CN112261896A

CN112261896A - Dust collector and control method thereof

Info

Publication number: CN112261896A
Application number: CN201980037626.0A
Authority: CN
Inventors: 文柄烈
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2018-04-06
Filing date: 2019-04-05
Publication date: 2021-01-22
Also published as: WO2019194654A1; KR20190117173A

Abstract

The invention provides a dust collector and a control method thereof, comprising the following steps: a suction mechanism including a brush and an operation portion arranged at a suction port for sucking dust; the present invention is configured to set a suction intensity corresponding to an input of an operation part, and change an applied operating power according to the suction intensity to change a rotation speed of the brush, thereby easily controlling the rotation speed of the brush, achieving a state of easily sucking foreign matters on a ground surface by controlling the rotation of the brush, and greatly improving a suction effect of the foreign matters.

Description

Dust collector and control method thereof

Technical Field

The present invention relates to a vacuum cleaner and a control method thereof, and more particularly, to a vacuum cleaner which moves along with movement of a handle and controls suction force to foreign substances, and a control method thereof.

Background

A vacuum cleaner is a device that sucks dust from a floor. In general, a vacuum cleaner includes: a suction mechanism having a suction port for sucking air; the body is connected with the suction mechanism through a hose forming a suction flow path. The body is provided with an air suction fan which forms negative pressure to enable air to be sucked through the suction inlet, and the suction mechanism or the body is provided with a dust collecting part for collecting dust flowing in through the hose.

The suction mechanism incorporates a brush or the like in the suction port so as to be able to effectively suck foreign substances.

The suction force is generated and the brush positioned at the suction port is rotated, thereby assisting the suction of the foreign matters on the ground surface more effectively.

Such a brush is rotated in response to a key input from the handle. The brush is separately provided with a drive for its rotation.

However, such a brush has a problem that the degree of rotation is not changed depending on the strength of the suction force, but simply rotates.

In order to cope with such a problem, there is a problem that a means for adjusting the speed needs to be additionally provided on the suction mechanism side in order to control the rotation speed of the brush.

Further, since the means for adjusting the speed may generate heat, it is necessary to additionally provide various components in a narrow suction mechanism for the purpose of additional heat dissipation design or the like, and it is also necessary to improve the problem that malfunction may occur due to electronic interference in the circuit.

Disclosure of Invention

Problems to be solved

The invention aims to provide a dust collector and a control method thereof, which not only controls suction force corresponding to the input of a handle, but also controls the rotation of a brush of a suction mechanism.

Technical scheme for solving problems

A vacuum cleaner according to an embodiment of the present invention includes: a suction mechanism including a suction nozzle including a brush arranged at a suction port for sucking dust and performing a rotating motion, and an operation part for adjusting a suction intensity; and a body connected to the suction mechanism by a hose to catch dust sucked from the suction mechanism, the body including: a first driving unit for applying a first voltage to the suction nozzle according to a suction intensity set in response to an input from the operation unit; and a second driving unit for applying a second voltage to the suction nozzle according to a suction intensity set according to an input from the operation unit, wherein the suction nozzle rotates the brush at a first speed or a second speed according to the operating power applied by one of the first driving unit and the second driving unit.

The suction device is characterized by further comprising a power supply part for supplying working power to the body and the suction mechanism, wherein the first driving part and the second driving part apply feedback signals to the power supply part, and the power supply part supplies the first voltage or the second voltage to the suction nozzle according to the feedback signal input from one of the first driving part and the second driving part.

Characterized in that the suction nozzle further comprises a suction nozzle motor for providing a rotating force to the brush, and the suction nozzle motor operates according to the magnitude of the working power supply.

The main body further includes a control unit for setting the suction intensity in response to an input from the operation unit, wherein the control unit operates the first driving unit when the suction intensity is smaller than a set value, and operates the second driving unit when the suction intensity is equal to or greater than the set value.

Wherein the body moves following the suction mechanism in accordance with the movement of the suction mechanism.

Further, the present invention includes: a suction mechanism including a suction nozzle including a brush arranged at a suction port through which dust is sucked and assisting suction of foreign matter by a rotational motion thereof, and an operation part adjusting a suction intensity; and a body connected to the suction mechanism by a hose to catch dust sucked from the suction mechanism, the body including: a suction force providing part forming a negative pressure for sucking dust; a control part which sets the suction intensity of the dust sucked through the suction inlet corresponding to the input of the operation part and controls the negative pressure of the suction providing part; and a nozzle driving unit that changes a rotation speed of the brush in accordance with the suction intensity.

The brush is rotated at a first speed or a second speed according to a voltage of the operating power supplied from the nozzle driving unit.

Wherein the suction nozzle further includes a suction nozzle motor for supplying a rotational force to the brush, and the suction nozzle motor operates according to a magnitude of the operating power supplied from the suction nozzle driving part.

The nozzle driving part includes: a first driving unit that applies a first voltage to the suction nozzle in accordance with the suction intensity; and a second driving unit for applying a second voltage to the suction nozzle according to the suction intensity.

Wherein the control unit applies a first signal to the first driving unit when the inhalation intensity is less than a set value, and applies a second signal to the second driving unit when the inhalation intensity is equal to or greater than the set value.

Further, a control method of the present invention includes: a step of setting suction intensity for sucking dust according to input of an operation part formed on the handle; generating suction force corresponding to the suction intensity and collecting the dust sucked by the suction mechanism to the body; rotating a brush disposed in the suction mechanism at a first speed in accordance with the suction intensity; and rotating the brush at a second speed faster than the first speed when the suction intensity is increased by the operation unit.

Further comprising: a step of applying a first voltage to a nozzle motor for supplying a rotational force to the brush in correspondence to the suction intensity; and a step of rotating the brush at the first speed using the operating power source of the first voltage.

Further comprising: a step of applying a second voltage to a nozzle motor for supplying a rotational force to the brush when the suction intensity increases; and rotating the brush at the second speed by using the working power supply of the second voltage.

Effects of the invention

According to the vacuum cleaner and the control method thereof of the present invention, the suction force through the suction mechanism is controlled according to the signal input from the handle of the suction mechanism of the vacuum cleaner, and the rotation of the brush provided on the suction mechanism is controlled, thereby having an effect of improving the cleaning performance by the brush.

The invention can supply different working power supplies to the suction mechanism.

The invention can change the rotating speed of the brush arranged on the suction mechanism according to the suction intensity.

The invention arranges a small number of power lines in the hose connecting the suction mechanism and the body, and can supply working power supplies with different sizes to the suction mechanism.

The present invention removes unnecessary structural elements and can easily change the rotation speed of the brush by changing the working power supply for operating the brush.

The invention achieves the state of easily sucking the foreign matters on the ground surface by the rotation of the brush, thereby having the effect of greatly improving the suction effect of the foreign matters.

Drawings

Fig. 1 is a perspective view showing a structure of a vacuum cleaner according to an embodiment of the present invention.

Fig. 2 is a perspective view illustrating the structure of the inhalation mechanism of fig. 1.

Fig. 3 is a diagram showing a configuration for supplying power to the suction mechanism of fig. 1.

Fig. 4 is a block diagram schematically showing a control structure of a vacuum cleaner according to an embodiment of the present invention.

Fig. 5 is a block diagram showing a control structure for controlling the suction nozzle of an embodiment of the present invention.

Fig. 6 is a diagram illustrating a first embodiment of the nozzle driving part of fig. 5.

Fig. 7 is a diagram illustrating a second embodiment of the nozzle driving part of fig. 5.

Fig. 8 is a flowchart illustrating a control method of a vacuum cleaner according to an embodiment of the present invention.

Detailed Description

The advantages, features and methods for achieving the same of the present invention will be more apparent by referring to the drawings and detailed embodiments described later. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and the embodiments are only for the purpose of more fully disclosing the present invention, so as to more fully suggest the scope of the present invention to those skilled in the art to which the present invention pertains, and the present invention is defined only by the scope of the claims. Throughout the specification, like reference numerals denote like structural elements. The control unit and each part of the present invention may be realized by one or more processors, and may be realized by a hardware device.

Embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

Fig. 1 is a perspective view showing the structure of a vacuum cleaner of a first embodiment of the present invention.

As shown in fig. 1, the cleaner of the present invention comprises: a suction mechanism 100 movably provided and sucking dust; the main body 200 collects dust sucked by the suction mechanism 100 and can travel. The body 200 follows the suction mechanism 100 to travel.

The suction mechanism 100 and the main body 200 are connected by a hose 300, and air sucked by the suction mechanism 100 flows into the main body 200 through the hose 300. The body 200 may be provided with a dust collection barrel 219 for collecting dust floating in the air flown through the hose 300.

The suction mechanism 100 is formed with a suction port (not shown) through which outside air is sucked, and the main body 200 can supply suction force through the hose 300 to suck outside air through the suction port. The inhalation mechanism 100 is moved along the floor by the action of the user.

The inhalation mechanism 100 may include: a suction nozzle 120 formed with a suction port through which dust is sucked; an air suction pipe 130 extending from the suction nozzle 120 and forming a passage for moving dust sucked through the suction inlet; the handle 140 is disposed above the suction pipe 130. The movement of the inhalation mechanism 100 can be achieved by pushing or pulling in a state where the user holds the handle 140. The suction nozzle 120 moves in a state where the suction port faces the floor of the cleaning region, thereby sucking dust on the floor.

The air suction pipe 130 forms a passage for moving air sucked through the suction nozzle 120. The air suction duct 130 may include: a lower pipe 131 connected to the suction nozzle 120; the upper pipe 132 is slidably provided with respect to the lower pipe 131. The entire length of the suction pipe 130 can be changed by sliding the upper pipe 132 along the lower pipe 131. When cleaning is performed, the handle 140 is preferably located at a position higher than the user's waist, which is provided in the upper tube 132 in this embodiment.

The hose 300 is configured to allow air to flow in through one end connected to the air suction pipe 130 and to allow air to be discharged through the other end connected to the body 200. The hose 300 is flexible so as to be bendable with movement of the inhalation mechanism 100. Accordingly, the position of the suction mechanism 100 with respect to the body 200 may be changed according to the user's operation, but since the suction mechanism 100 moves within the length of the hose 300, the suction mechanism 100 does not move away from the body 200 by more than a predetermined distance.

The hose 300 includes a body connection part 320 connected with the body 200. The body connection part 320 is a rigid body that moves integrally with the body 200. The body connection part 320 may be detachably combined with the body 200.

The body 200 may include: a housing 211 forming an external appearance; at least one

wheel

212, 213 is rotatably disposed in the housing 211. The body 200 can not only go straight but also change direction using the

wheels

212, 213. In the present embodiment, a left wheel 212 and a right wheel 213 are respectively provided on left and right sides of the housing 211, and the direction switching is implemented according to a difference in rotation speed of the left wheel 212 and the right wheel 213.

The body 200 may include a traveling part 250 for rotating the left and

right wheels

212 and 213, and the traveling part 250 may include at least one motor. According to the embodiment, a pair of motors that drive the left and

right wheels

212 and 213, respectively, may be provided, and variously, one motor and a transmission unit that transmits the driving force of the motor to the left and

right wheels

212 and 213 may be included. In the former case, the direction change of the body 200 may be implemented according to the rotational speed difference of the respective motors, and in the latter case, the direction change of the body 200 is implemented according to the rotational speed difference of the left and

right wheels

212 and 213 transmitted from the transmission unit. The traveling unit 250 may include a clutch that transmits the driving force of the motor to the

wheels

212 and 213.

The body 200 may include a suction providing part 240. The suction force providing part 240 may form a negative pressure to enable the suction mechanism 100 to suck the external air, and includes a fan motor (not shown) and a fan (not shown) rotated by the fan motor. The fan motor can be operated under the control of the suction control section 234 of the control section 230. The suction force providing part 240 may be provided in the housing 211, and in addition to this, a dust collection barrel 219 that collects dust sucked through the hose 300 may be disposed in the housing 211.

The inhalation mechanism 100 may include an operating portion 110. The operation unit 110 is used for inputting various control instructions from a user, and particularly, the operation control of the suction force providing unit 240 can be realized by the operation unit 110. The operation section 110 is preferably arranged at a position defined so as to be operable with the thumb of the user holding the handle 140, and on such a level, the operation section 110 is disposed on the handle 140 in the embodiment, but is not limited thereto. The suction control part 234 may control the operation of the suction force providing part 240 according to a control command input through the operation part 110.

The body 200 follows the suction mechanism 100 to travel.

The body 200 can track the suction mechanism to travel by calculating the position of the suction mechanism by analyzing the tension of the hose 300 and the direction of the hose.

The main body 200 may include an image acquiring unit (not shown) and photograph a mark (not shown) irradiated from the inhalation mechanism 100, thereby analyzing the position and form of the mark to estimate the position of the inhalation mechanism 100 and to track the inhalation mechanism to travel.

The main body 200 may receive a position signal transmitted from the suction mechanism 100, calculate the position of the suction mechanism, and track the suction mechanism to travel. The suction mechanism may transmit a position signal by using a signal in the form of UWB, infrared ray, ultrasonic wave, laser, or the like, and the main body 200 may track the suction mechanism and travel by calculating the position and distance of the suction mechanism based on the received position signal.

The body 200 may track the suction mechanism to travel in combination with one or more of the above-described tracking means, and may track the suction mechanism to travel in various ways not explicitly shown.

As shown in fig. 2, the suction mechanism 100 includes a suction nozzle 120 forming a suction port.

The suction nozzle 120 includes: a nozzle housing 121 forming an external appearance; a brush 123 disposed in the suction nozzle and disposed inside the suction nozzle housing 121; and a nozzle motor 124 for rotating the brush.

The suction nozzle housing 121 is formed with a suction nozzle at a lower portion thereof, and protects a brush 123 provided inside from external impact. The nozzle case 121 forms a space in which the brush 123 can rotate.

A part of the upper surface of the nozzle housing 121 may be formed of a transparent material to expose the brush 123 disposed therein.

A certain side of the nozzle housing 121 may be separated to be opened. The suction nozzle housing is opened when a fixing portion provided at one side surface is released, and the brush arranged inside is separated from the suction nozzle housing.

The brush 123 performs a rotating operation in the suction nozzle case, and moves foreign substances on the floor surface toward the suction nozzle. The brush 123 rotates around a rotation shaft formed at the left and right sides of the suction nozzle housing.

The brush 123 may be a brush having a plurality of brushes made of a bristle material or a brush having a pile attached thereto as a fabric.

As the brush 123 rotates, foreign matter on the floor surface is swept and moved toward the suction port, and the foreign matter is collected in the dust collecting portion by suction. Further, an air flow can be formed inside the nozzle housing 121 by a centrifugal force acting on the brush during the rotation operation of the brush 123. Thereby, the suction force can be increased based on the physical force generated by the rotation of the brush and the air flow generated by the centrifugal force.

The brush 123 may be separated from the nozzle housing.

The nozzle motor 124 is formed at one of the left or right sides of the nozzle housing 121 where the rotation shaft of the brush is formed. The nozzle motor may be provided at both sides of the nozzle housing as needed. The nozzle motor is operated by the working power supplied from the main body, and is operated or stopped according to the key input of the handle.

The nozzle motor 124 is configured such that a drive shaft (not shown) thereof is coupled to the brush, thereby rotating the brush as the drive shaft rotates. The nozzle motor may change its rotation speed corresponding to the suction force set by the handle.

As shown in fig. 3, a hose 300 connects the suction mechanism 100 and the body 200.

The hose 300 allows foreign matter such as dust sucked from the suction mechanism 100 to flow into the main body 200. The hose 300 is flexible so as to be bendable with movement of the inhalation mechanism 100. The hose 300 is in the form of a bellows that can be lengthened or shortened by a predetermined distance within the length of the hose.

The hose 300 is provided with a power cord 321 inside thereof for supplying power to the suction mechanism. The power supply line 321 is provided with at least two.

The power cord 321 may be inserted inside along the bellows of the hose 300 so as to rotate along the circumference of the hose. The power cord is rotatably disposed along the circumference of the hose, whereby the power cord is not broken even if the hose is elongated or bent. In some cases, the power cord 321 may include a power supply case (not shown) that is disconnected to prevent the power cord from being impacted from the outside, and the power cord 321 may be inserted into the power supply case.

The power cord 321 supplies power to the operation portion of the handle. Power can be supplied to the

nozzle motors

124 and 150 provided at the suction ports of the suction mechanism.

The main body 200 supplies operating power for the operations of the handle operating unit 110, the position information transmitting unit 190, and the sensor unit 180, and supplies operating power for the nozzle motor 150 through a power cord. The nozzle motor 150 may be connected with at least two power lines so as to operate at different speeds according to respective different voltages of the operating power. The action of the brush 123 will change corresponding to the operation speed of the nozzle motor.

Thus, the position of the inhalation mechanism 100 with respect to the body 200 can be changed according to the user's operation, but since the inhalation mechanism 100 moves within the length of the hose 300, the inhalation mechanism 100 does not move away from the body 200 by a predetermined distance or more.

As shown in fig. 4, the cleaner includes a suction mechanism 100 and a body 200.

The suction mechanism 100 includes a position information transmitting unit 190, a sensor unit 180, an operation unit 110, and a nozzle motor 150.

The operation part 110 is used to input various control instructions from a user, and particularly, it includes a switch for setting a suction force. The operation unit 110 transmits the input control command to the control unit 230, and the control unit 230 controls the operation of the suction force providing unit 240 according to the control command. The operation portion 110 is preferably prescribed in its arrangement position so as to be operable with the thumb of the user holding the grip 140.

For example, the operation portion 110 may be constituted by a slide key or a plus key and a minus key. In the case of the slide key, the suction intensity is set according to the position of the slide key. Also, in the case where the plus key and the minus key are provided, the inhalation intensity may be increased in proportion to the number of times the plus key is pressed and decreased in proportion to the number of times the minus key is pressed.

The sensor part 180 includes a plurality of sensors and senses the movement of the inhalation mechanism 100. The sensor unit 180 senses whether the handle is moved or not and whether the user holds the handle or not. As the user operates the inhalation mechanism 100, the sensor portion 180 senses the slope of the inhalation mechanism 100, particularly, the change in the slope of the inhalation tube 130, and inputs the same to the control portion 230.

The position information transmitting unit 190 transmits a position information signal indicating the position of the inhalation mechanism 100. The location information transmitting unit 190 may transmit one or more location information signals.

The position information transmitting unit 190 may transmit the position information signal in the form of infrared ray, ultrasonic wave, laser, UWB.

The position information transmitting unit 190 may transmit the position information signal at predetermined time intervals and may transmit the position information signal according to a change or movement of the position of the inhalation mechanism 100.

The position information transmitting unit 190 may output a marker of a predetermined form as a position information signal as necessary. The technique of moving the body 200 to follow the movement of the inhalation mechanism 100 is not limited thereto, and various methods may be employed.

The main body 200 may receive the position information signal to determine the movement of the inhalation mechanism 100 and move following the movement of the inhalation mechanism.

The main body 200 includes a position information receiving part 220, an obstacle sensing part 260, a traveling part 250, a suction force providing part 240, a nozzle driving part 280, and a power supply part 290, and includes a control part 230 for controlling the overall operation.

The main body 200 may further include a storage unit (not shown) for storing data for calculating and tracking the position of the inhalation mechanism 100 based on the position information signal or data sensed by the sensor unit.

The storage unit stores various information required for controlling the cleaner, and the storage unit stores an operation mode of the cleaner, data sensed during traveling, and data for calculating a travel distance and a position corresponding to the traveling of the cleaner. The storage section may include a volatile or nonvolatile recording medium. The recording medium is used to store data that can be read by a microprocessor (micro processor), and may include an hdd (hard Disk drive), an ssd (solid State Disk), an sdd (silicon Disk drive), a ROM, a RAM, a CD-ROM, a magnetic tape, a flexible Disk, an optical data storage device, and the like.

The traveling unit 250 controls the body 200 to move by rotating the left wheel 212 and the right wheel 213. The traveling unit 250 includes at least one motor and controls the operation thereof.

The suction force providing part 240 forms a negative pressure to enable the suction mechanism 100 to suck outside air. The suction providing part 240 may include a fan motor (not shown) and a fan (not shown) rotated by the fan motor.

The obstacle sensing part 260 senses an obstacle located in the moving direction of the body and inputs it to the control part. At this time, the obstacle sensing part 260 may sense an obstacle using ultrasonic waves, laser light, or pattern light.

The power supply unit 290 charges the battery with a commercial power supply, and supplies operating power of a predetermined size from the charged battery to each component. The power supply part 290 may include an SMPS that supplies a constant voltage required for each constituent part.

The nozzle driving part 280 changes the operation power supplied from the power supply part 290 according to the setting of the operation part 110, and supplies the changed operation power to the nozzle motor 150.

The nozzle driving part 280 applies voltages of different magnitudes to the nozzle motors in accordance with the setting of the operation part 110, particularly in accordance with the suction intensity. The nozzle driving part 280 divides the suction intensity into a plurality of stages and applies a voltage of a predetermined magnitude to the nozzle motor 150 according to the stages.

Thereby, the brush 123 connected to the nozzle motor 150 operates at different rotational speeds according to the suction intensity.

The control unit 230 controls the traveling unit 250 so that the main body 200 travels following the suction mechanism 100 in accordance with the change in the position of the suction mechanism 100 based on the position information signal received by the position information receiving unit 220. The control unit 230 controls the suction force providing unit 240 to collect dust by the suction mechanism 100 and to change the moving direction of the main body according to the sensing result of the obstacle sensing unit 260.

The control section 230 includes: a position setting unit 231, a travel operation setting unit 232, a travel control unit 233, a suction control unit 234, and a nozzle control unit 235.

The positional information receiving unit 220 receives the positional information signal transmitted from the positional information transmitting unit 190 of the inhalation mechanism 100. The position information receiving part 220 may be provided with one or a plurality of. When the position information receiving unit 220 is provided in plural, one signal transmitted from the position information transmitting unit may be received by the plural position information receiving units.

The positional information receiving unit 220 includes a receiving module for receiving at least one of the infrared ray, the ultrasonic wave, the laser, and the UWB signal corresponding to the positional information transmitting unit 190.

The position setting unit 231 analyzes the position information signal received by the position information receiving unit 220, and calculates the position of the suction mechanism.

For example, in the case where the position information receiving unit 220 is provided in plural numbers, the position setting unit 231 may calculate the distance from the suction mechanism and the relative position of the suction mechanism based on the mounting position and mounting pitch of the position information receiving unit 220 by receiving a signal transmitted from the position information transmitting unit 190 when the plural number of position information receiving units receive the signal, and based on the mounting position of the position information receiving unit.

The distance between the suction mechanism and the main body is the distance from the position information transmitting unit of the suction mechanism to the main body. Further, in the case where one position information receiving unit is provided, it may be a distance to the position information receiving unit, and in the case where a plurality of position information receiving units are provided, it may be a center point of a point where the plurality of position information receiving units are connected to each other.

The position setting unit 231 transmits the calculated position of the suction mechanism to the travel operation setting unit 232.

The travel operation setting unit 232 sets the travel direction and the travel route based on the position of the suction mechanism calculated by the position setting unit 231, and causes the main body to travel while following the suction mechanism. The travel operation may be a movement distance and/or a movement direction of the main body 200 set based on the distance information and/or the direction information.

The travel operation setting unit 232 sets the travel operation or the travel route based on the obstacle information acquired by the obstacle sensing unit 260, so that the main body 200 can trace the suction mechanism 100 while avoiding an obstacle.

The travel operation setting unit 232 inputs the setting relating to the travel operation of the main body 200 to the travel control unit 233.

The travel control unit 233 controls the travel unit 250 according to the set travel operation, and the main body 200 follows the suction mechanism 100 accordingly.

By controlling the traveling unit 250 by the traveling control unit 233, the main body 200 moves or changes the moving direction according to the set traveling operation and follows the suction mechanism 100.

Wherein the movement of the body 200 does not need to be performed until reaching the inhalation mechanism 100. Since the user is typically located between the body 200 and the inhalation mechanism 100, the body 200 need only be moved to a position spaced a predetermined distance from the inhalation mechanism 100. For example, in the case where the hose 300 has a length of 1 meter (m), the body 200 may be moved to a position spaced apart from the suction mechanism 100 by about 40 to 60 centimeters (cm) and then stopped. The distance from the main body 200 to the suction mechanism 100 is based on the distance measured on the floor surface, and the distance can be determined based on the position of the suction mechanism calculated from the position information signal.

When an operation start command is input through the operation unit 110, the suction control unit 234 operates the suction force supply unit 240 to generate a suction force. Also, when the suction intensity (level) is changed by the operation portion 110, the suction control portion 234 controls the suction force providing portion 240 to change the suction force.

The nozzle control unit 235 changes the rotation speed of the brush connected to the nozzle motor in accordance with the suction intensity set by the operation unit 110.

The nozzle control part 235 divides the set suction intensity into a plurality of stages and applies control signals to the nozzle driving part 280 at different stages.

The nozzle driving part 280 includes a plurality of driving parts, and thus applies a voltage of a predetermined magnitude to the nozzle motor 150 according to a control signal applied from the nozzle control part 235.

For example, when the suction force is less than a predetermined value, the nozzle control part 235 applies a first signal to the nozzle driving part 280, and when the suction force is greater than or equal to the predetermined value, the nozzle control part 235 applies a second signal to the nozzle driving part 280. Thus, the nozzle driving part operates one driving part according to the control signal, and applies the operation power of the first voltage or the second voltage corresponding thereto to the nozzle motor 150.

The nozzle driving part 280 may apply a first voltage to the nozzle motor corresponding to the first signal and apply a second voltage to the nozzle motor corresponding to the second signal. In this case, the first voltage and the second voltage applied to the nozzle motor are merely examples, and the third voltage or the fourth voltage may be applied in stages. The nozzle driving part 280 applies different feedback signals to the power supply part 290 according to the control signal of the nozzle control part 235, thereby supplying the operation power of the first voltage or the second voltage from the power supply part to the nozzle motor.

As shown in fig. 5, the nozzle driving unit 280 is connected to the power supply unit 290, and thus, the operating power supplied from the power supply unit 290 is converted according to the control signal of the nozzle control unit 235, and a voltage of a predetermined magnitude is applied to the nozzle motor 150 through the power output terminal VO.

The nozzle driving part 280 includes a plurality of driving parts outputting different voltages, respectively.

The nozzle driving part 280 includes: a first driving part 281 outputting a first voltage to the nozzle motor 150; the second driving unit 282 outputs a second voltage to the nozzle motor 150. The second voltage is a voltage higher than the first voltage.

In the following, the nozzle driving unit 280 is described as including the first driving unit and the second driving unit, but the present invention is not limited to the embodiments shown in the drawings, and may include a third driving unit or a fourth driving unit according to the magnitude of the voltage applied to the nozzle motor.

The nozzle control unit 236 applies the first signal S1 or the second signal S2 to the nozzle driving unit 280 in accordance with the suction intensity set by the operation unit 110.

When the first signal S1 is applied, the first driving part 281 operates to output the operation power of the first voltage to the nozzle motor 150, and when the second signal S2 is applied, the second driving part 282 operates to output the operation power of the second voltage to the nozzle motor.

The nozzle driving part 280 may convert the operation power of the power supply part 290 and apply it to the nozzle motor. The nozzle driving unit 280 may apply a predetermined signal to the power supply unit so that the power supply unit 290 outputs the operating power of the first voltage or the second voltage.

The nozzle driving part 280 may be provided in a feedback circuit of the power part to apply a feedback signal FS to the power part 290.

Thereby, the nozzle motor 150 operates by the operating power supply of the first voltage or the second voltage. The brush 123 is rotated at a first speed by a first voltage and rotated at a second speed by a second voltage. The second speed is a rotational speed higher than the first speed.

The nozzle driving part 280 may be configured as shown in fig. 6 and 7.

The nozzle driving part 280 includes a first switch TR1, a second switch TR2, a plurality of resistors (R1 to R6), a diode S4, and a capacitor C1 connected to the power supply part 290. The nozzle driving unit 280 may further include a photodiode D5 for applying a feedback signal FS to the power supply unit 290 at a connection point connected to the power supply unit 290. A circuit including a plurality of resistors and capacitors may be further provided between the photodiode D5 and the power supply unit 290.

The first driving portion 281a of the first embodiment includes: the circuit comprises a first switch TR1, a first resistor R1, a third resistor R3 and a fourth resistor R4.

The second driving portion 282a of the first embodiment includes: a second switch TR2, a second resistor R2, a third resistor R3 and a fourth resistor R4.

A third resistor, a fourth resistor, and other resistors, diodes, and capacitors are commonly applied to the first driving portion 281a and the second driving portion 282 a.

The first switch TR1 is operated by a first signal S1 applied from the nozzle control unit 235. A first resistor R1 is connected to one end of the first switch, and a third resistor R3 and a fourth resistor R4 are connected to the other end of the first switch.

The second switch TR2 has one end connected to the second resistor R2 and the other end connected to the third resistor R3 and the fourth resistor R4.

The fourth resistor is connected to capacitor C1. One end of the third resistor and one end of the fourth resistor are respectively connected with the diode D4. Diode D4 is a zener diode. The diode D4 has an anode connected to ground and the third resistor, and a cathode connected to the sixth resistor R6 and the capacitor C1.

The first resistor R1 and the second resistor R2 are connected to the power output terminal VO of the power supply section 290.

The first switch is turned ON (ON) when the first signal S1 is applied to flow a current from the first resistor R1 to the third resistor R3, and applies a current according to a resistance ratio of the first resistor R1 and the third resistor R3.

The photodiode D5 operates by the current applied by the operation of the first switch TR1 and applies a signal for outputting the first voltage to the power supply unit 290 as the feedback signal FS, whereby the operating power of the first voltage from the power supply unit 290 is supplied to the nozzle motor through the power output terminal VO.

When the second signal S2 is applied, the second switch TR2 is turned ON (ON), a current flows from the second resistor R2 to the third resistor R3, and a current is applied according to a resistance ratio of the second resistor and the third resistor.

The photodiode D5 connected to the power supply unit 290 is operated by the current applied by the first and second driving units, and the operating power of the second voltage from the power supply unit 290 is supplied to the nozzle motor through the power output terminal VO as the feedback signal FS is applied to the power supply unit.

The nozzle driving part 280 may be configured to operate the photodiode D5 by a current applied according to a resistance ratio of the first resistance and the third resistance, and a resistance ratio of the second resistance and the third resistance, and to apply a feedback signal FS having different magnitudes to the power supply part 290, thereby outputting voltages having different magnitudes to the nozzles.

Since the feedback signal FS applied to the power supply 290 by the first and second driving units has different magnitudes, the operation power supply of the first voltage or the second voltage can be output to the nozzle motor.

The nozzle driving part 280 of the second embodiment includes: the 11 th switch TR11, the 12 th switch TR12, the 11 th through 12 th resistors R11 through R12, the 11 th diode ZD1, the 12 th diode ZD2, and the 13 th diode D3.

The first driving part 281b of the nozzle driving part of the second embodiment includes: an 11 th switch TR11, an 11 th diode ZD1, an 11 th resistor R11, and a 12 th resistor R12.

The second driving unit 282b includes: a 12 th switch TR12, a 12 th diode ZD2, an 11 th resistor R11, and a 12 th resistor R12.

The 13 th diode D3, the 11 th resistor R11, and the 12 th resistor R12 are commonly applied to the first driving unit and the second driving unit.

The 11 th switch TR11 has one terminal connected to the 11 th diode ZD1 and the other terminal connected to the 11 th resistor R11. The 11 th diode ZD1 has one end connected to the 11 th switch TR11 and the other end connected to the 13 th diode D3.

The 12 th switch TR12 has one terminal connected to the 12 th diode ZD2 and the other terminal connected to the 11 th resistor R11. The 12 th diode ZD2 has one end connected to the 12 th switch TR12 and the other end connected to the 13 th diode D3.

The 11 th resistor R11 has one end connected to the 11 th switch TR11 and the 12 th switch TR12, and the other end connected to the 12 th resistor R12 and the power supply unit 290. One end of the 12 th resistor R12 is connected to the 11 th resistor, and the other end is connected to the power supply unit 290. A plurality of resistors, capacitors, and diodes may be further connected between the 11 th resistor and the 12 th resistor and the power supply unit.

When the first signal S1 is applied from the nozzle control part to the nozzle driving part, the 11 th switch TR11 is Operated (ON), and thereby the feedback signal FS is applied to the power supply part through the 11 th resistor or the 12 th resistor according to whether the 11 th diode ZD1 is ON or off.

When the second signal S2 is applied from the nozzle control unit to the nozzle driving unit, the 12 th switch TR12 is Operated (ON), and thereby the feedback signal FS is applied to the power supply unit through the 11 th resistor or the 12 th resistor according to whether the 12 th diode ZD12 is ON or off.

The magnitudes of voltages at which the 11 th diode ZD1 and the 12 th diode ZD2 are turned on are set to different Zener diodes (Zener diodes). Anodes of the 11 th diode ZD1 and the 12 th diode ZD2 are connected to switches, respectively, and cathodes thereof are connected to the cathode of the 13 th diode D3.

That is, when the 11 th switch or the 12 th switch is turned on, a voltage is reversely applied from the 13 th diode to the 11 th diode ZD1 or the 12 th diode ZD 2.

When the reverse applied voltage is greater than the set breakdown voltage, the 11 th diode ZD1 and the 12 th diode ZD2 are turned on, and thus, a current flows from the 13 th diode to the 11 th resistor. Since the on voltages (breakdown voltages) of the 11 th diode ZD1 and the 12 th diode ZD2 are different in magnitude, different feedback signals can be applied to the power supply section.

The nozzle driving unit can change the magnitude of the feedback signal FS by operating the 11 th switch or the 12 th switch according to the control signal using the 11 th diode ZD1 and the 12 th diode ZD 2. The power supply unit supplies an operating power supply of a first voltage or a second voltage to a nozzle motor of the nozzle in response to the feedback signal.

As shown in fig. 8, the power supply unit supplies operating power to each unit of the vacuum cleaner by the operation unit 110, and the vacuum cleaner starts operating (step S310).

The suction intensity through the suction port of the suction mechanism is input by the setting of the operation unit 110 (step S320). The suction intensity may be set according to the configuration of the operation unit, the degree of sliding of the operation unit, the number of times of key depression of the operation unit, and the type of key selected by the operation unit.

For example, in the case where the operation portion is constituted by a plus key and a minus key, the suction intensity may be increased in proportion to the number of times of pressing the plus key and decreased in proportion to the number of times of pressing the minus key.

The suction control part 234 controls the suction providing part 240 according to the input of the operation part 110. The suction force providing unit 240 forms a negative pressure, and thereby the suction mechanism 100 sucks in the outside air through the suction port.

Then, the nozzle control unit 235 operates the nozzle driving unit 280 in accordance with the suction intensity by the input of the operation unit 110. The nozzle driving part 280 applies a voltage corresponding to the suction intensity to the nozzle motor 150.

Thereby, the nozzle motor 150 of the nozzle 120 rotates at a predetermined speed according to the applied voltage, and the brush 123 rotates by the operation of the nozzle motor (step S330).

At this time, the nozzle control part 235 applies the second signal to the nozzle driving part when the suction intensity is the set value or more (step S340), and applies the first signal to the nozzle driving part when the suction intensity is less than the set value.

The nozzle driving part applies a first voltage to the nozzle motor under the action of the first signal, and applies a second voltage to the nozzle motor under the action of the second signal.

When the first signal is applied, the nozzle motor is rotated at a first speed (step S350), and when the second signal is applied, the nozzle motor is rotated at a second speed (step S360).

The brush 123 rotates at a predetermined rotation speed in accordance with the suction intensity set by the operation unit, and sucks foreign matter on the floor while sucking outside air.

Thus, in the present invention, the main body moves following the suction mechanism, and the rotation speed of the brush of the suction nozzle can be controlled in accordance with the suction force changed in accordance with the setting of the operation portion. As the rotational speed of the brush is variable, suction of foreign matter will be easily achieved.

The above description is only exemplary of the technical idea of the present invention, and those skilled in the art to which the present invention pertains can make various modifications and variations within a scope not departing from the essential characteristics of the present invention.

Description of the reference numerals

100: the suction mechanism 110: operation part

120: the suction nozzle 123: brush with brush head

124. 150: nozzle motor 200: body

220: position information receiving unit 230: control unit

231: position setting unit 232: travel operation setting unit

233: travel control unit 234: suction control unit

235: nozzle control unit 240: suction force providing part

250: the traveling unit 260: obstacle sensing unit

280: suction nozzle driving part

Claims

1. A vacuum cleaner, comprising:

a suction mechanism including a suction nozzle including a brush arranged at a suction port for sucking dust and performing a rotating motion, and an operation part for adjusting a suction intensity; and

a body connected with the suction mechanism by a hose for catching the dust sucked from the suction mechanism,

the body includes:

a first driving unit for applying a first voltage to the suction nozzle according to the suction intensity set by the operation unit; and

a second driving part for applying a second voltage to the suction nozzle according to the suction intensity set by the operation part,

the brush is rotated at a first speed or a second speed faster than the first speed according to an operating power applied to the suction nozzle by one of the first and second driving parts.

2. The vacuum cleaner of claim 1,

also comprises a power supply part for providing working power supply for the body and the suction mechanism,

the first and second driving portions apply a feedback signal to the power supply portion,

the power supply unit supplies the first voltage or the second voltage to the suction nozzle according to a feedback signal input from one of the first driving unit and the second driving unit.

3. The vacuum cleaner of claim 1,

the suction nozzle further includes a nozzle motor providing a rotational force to the brush,

the suction nozzle motor acts according to the size of the working power supply.

4. The vacuum cleaner of claim 1,

the body further includes a control part for setting the suction intensity corresponding to the input of the operation part,

the control unit operates the first driving unit when the inhalation intensity is less than a set value, and operates the second driving unit when the inhalation intensity is greater than or equal to the set value.

5. The vacuum cleaner of claim 4,

the first driving unit includes a first switch and a plurality of resistors that operate according to a control signal applied from the control unit, and the second driving unit includes a second switch and a plurality of resistors that operate according to a control signal applied from the control unit.

6. The vacuum cleaner of claim 2,

the first driving part includes:

a first switch that operates according to a first signal of the control signals for operation; and

a plurality of resistors connected to the first switch,

the second driving part includes:

a second switch that operates according to a second signal of the control signals; and

and the plurality of resistors are connected with the second switch.

7. The vacuum cleaner of claim 6,

in the first and second driving units, when one of the first and second switches is turned on in response to the control signal, a resistance ratio formed by the plurality of resistors is changed, and the feedback signal based on a current of a predetermined magnitude is applied to the power supply unit.

8. The vacuum cleaner of claim 2,

the first driving part includes:

a first switch that operates according to a first signal of the control signals for operation;

the first diode is connected with the first switch; and

a plurality of resistors connected to the first switch,

the second driving part includes:

a second switch that operates according to a second signal of the control signals;

a second diode connected to the second switch; and

and the plurality of resistors are connected with the second switch.

9. The vacuum cleaner of claim 8,

in the first and second driving units, when one of the first and second switches is turned on in response to the control signal, the first diode or the second diode operates to apply the feedback signal based on a current of a predetermined magnitude to the power supply unit.

10. The vacuum cleaner of claim 2,

the power supply part supplies working power to the suction nozzle through a plurality of power supply lines inserted in the hose according to the feedback signal input from one of the first driving part and the second driving part.

11. The vacuum cleaner of claim 10,

the power cord is rotatably disposed along a circumference of the hose.

12. A control method of a vacuum cleaner, comprising:

a step of setting suction intensity for sucking dust according to input of an operation part formed on a handle of the suction mechanism;

generating a suction force corresponding to the suction intensity;

rotating a brush disposed in the suction mechanism at a first speed in accordance with the suction intensity;

a step of collecting the dust sucked by the suction mechanism into the body; and

and a step of rotating the brush at a second speed faster than the first speed when the suction intensity is increased by the operation unit.

13. The control method of a vacuum cleaner according to claim 12, further comprising: a step of applying a first voltage to a nozzle motor for supplying a rotational force to the brush in correspondence to the suction intensity; and

and a step of rotating the brush at the first speed by using the operating power source of the first voltage.

14. The control method of a vacuum cleaner according to claim 12, further comprising:

a step of applying a second voltage to a nozzle motor for supplying a rotational force to the brush when the suction intensity is increased; and

and a step of rotating the brush at the second speed by using the operating power supply of the second voltage.

15. The control method of a vacuum cleaner according to claim 12, further comprising:

and operating one of a first driving part and a second driving part for operating a nozzle driving part of the brush when the suction intensity is set.

16. The control method of a vacuum cleaner according to claim 15, further comprising:

inputting a feedback signal to a power supply unit by using one of the first driving unit and the second driving unit of the nozzle driving unit; and

and a step of supplying a working power source of a first voltage or a second voltage to the nozzle motor corresponding to the feedback signal.