WO2021230446A1 - 전력선 통신이 제공되는 진공 청소기 - Google Patents
전력선 통신이 제공되는 진공 청소기 Download PDFInfo
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- WO2021230446A1 WO2021230446A1 PCT/KR2020/015766 KR2020015766W WO2021230446A1 WO 2021230446 A1 WO2021230446 A1 WO 2021230446A1 KR 2020015766 W KR2020015766 W KR 2020015766W WO 2021230446 A1 WO2021230446 A1 WO 2021230446A1
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- control unit
- power line
- line communication
- motor
- voltage
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/24—Hand-supported suction cleaners
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/22—Mountings for motor fan assemblies
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2805—Parameters or conditions being sensed
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
- A47L9/2842—Suction motors or blowers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2868—Arrangements for power supply of vacuum cleaners or the accessories thereof
- A47L9/2884—Details of arrangements of batteries or their installation
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2894—Details related to signal transmission in suction cleaners
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/156—Arrangements in which a continuous pulse train is transformed into a train having a desired pattern
- H03K5/1565—Arrangements in which a continuous pulse train is transformed into a train having a desired pattern the output pulses having a constant duty cycle
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/548—Systems for transmission via power distribution lines the power on the line being DC
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2201/00—Robotic cleaning machines, i.e. with automatic control of the travelling movement or the cleaning operation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
- H03K9/08—Demodulating pulses which have been modulated with a continuously-variable signal of duration- or width-mudulated pulses or of duty-cycle modulated pulses
Definitions
- the present disclosure is an invention for a vacuum cleaner in which power line communication is performed between a body and a nozzle.
- a vacuum cleaner is a device that performs cleaning by sucking or wiping dust or foreign matter in an area to be cleaned.
- Such a vacuum cleaner may be divided into a manual cleaner in which the user directly moves the cleaner to perform cleaning, and an automatic cleaner in which the user performs cleaning while driving by themselves.
- the manual cleaner may be classified into a canister-type cleaner, an upright-type cleaner, a handy-type cleaner, a stick-type cleaner, and the like, depending on the shape of the cleaner.
- These manual vacuum cleaners suck external foreign substances through the nozzle, communicate with the nozzle, can adjust the length, and provide a passage for moving foreign substances, a motor that provides a foreign substance suction force to the head, and the moving speed and direction of the head, etc. It may include a state determination unit for determining the state of the motor, and a control unit for controlling the output of the motor.
- a user may attach and detach the nozzle and the main body including the motor providing suction power, and the type of the detachable head of the cleaner may vary depending on the use.
- the amount of foreign material suction can be reduced compared to the case of moving the vacuum cleaner slowly. intake may decrease.
- the present disclosure provides a vacuum cleaner capable of transmitting and receiving a predetermined signal between a main body and a head through a power line communication method instead of a wired/wireless communication method requiring additional wiring.
- a main body including a power supply unit configured to supply power, a first motor generating suction force, and a first PCB mounted with a first control unit; a nozzle having a cleaning unit, a second PCB equipped with a second motor for driving the cleaning unit, and a second control unit, and configured to suck air containing foreign substances by suction force;
- a vacuum cleaner may be provided wherein the first power line communication from the first control unit to the second control unit is voltage pulse width modulation (PWM) and the second power line communication from the second control unit to the first control unit is a current shaping method.
- PWM voltage pulse width modulation
- a vacuum cleaner capable of communicating between a main body and a head without using a wired/wireless communication method that requires a separate additional wiring in a situation where it is difficult to add additional hardware and there is a structural limitation.
- a vacuum cleaner capable of transmitting and receiving signals between a main body and a head even when a low-spec control unit is used.
- FIG. 1 is a block diagram of a vacuum cleaner in which a main body and a head communicate through a power line communication method according to an embodiment.
- FIG. 2 illustrates a process of transmitting a signal from the nozzle to the main body through second power line communication when a signal is transmitted from the main body to the nozzle through the first power line communication according to an embodiment.
- FIG 3 illustrates a process of transmitting a signal from the main body to the nozzle through the first power line communication when a signal is transmitted from the nozzle to the main body through the second power line communication according to an embodiment.
- FIG. 4 illustrates a process in which a body and a nozzle continuously communicate through a first power line communication and a second power line communication according to an embodiment.
- FIG. 5 is a diagram for explaining a power supply voltage compensation algorithm for compensating a voltage supplied to a nozzle according to a decrease in a voltage of the power supply unit according to an exemplary embodiment.
- FIG. 6 is a diagram for explaining a process in which a second control unit determines a pulse width of a voltage of a signal received through first power line communication, according to an exemplary embodiment.
- FIG. 7 is a diagram for explaining a method of a second controller performing power line communication and controlling a speed of a second motor when the second motor is a DC motor according to an exemplary embodiment.
- FIG. 8 is a diagram for explaining a method for a second controller to perform power line communication and control a speed of a second motor when the second motor is an AC motor, according to an exemplary embodiment.
- FIG 9 illustrates a configuration of a circuit included in a second PCB of a nozzle that receives a signal through first power line communication according to an embodiment.
- FIG. 10 is a view for explaining a characteristic in which a signal received through second power line communication is filtered through a filter included in a first PCB of a main body of a vacuum cleaner according to an exemplary embodiment
- a main body including a power supply unit configured to supply power, a first motor generating suction force, and a first PCB mounted with a first control unit; a nozzle having a cleaning unit, a second PCB equipped with a second motor for driving the cleaning unit, and a second control unit, and configured to suck air containing foreign substances by suction force;
- a vacuum cleaner may be provided wherein the first power line communication from the first control unit to the second control unit is voltage pulse width modulation (PWM) and the second power line communication from the second control unit to the first control unit is a current shaping method.
- PWM voltage pulse width modulation
- the first power line communication is a method of modulating the frequency of the voltage transmitted from the first control unit to the second control unit, the vacuum cleaner may be provided.
- the second power line communication is a method of modulating at least one of a magnitude and a frequency of a current transmitted from the second control unit to the first control unit, a vacuum cleaner may be provided.
- the first control unit may be configured to control at least one of the operation of the second motor and the operation of the cleaning unit through the first power line communication.
- the second control unit provides at least one of the operation state information of the second motor, the operation state information of the cleaning unit, and information indicating that the control operation received from the first control unit is completed through the second power line communication. 1 may be configured to transmit to the control unit.
- the first control unit may be configured to adjust a duty rate of a voltage PWM signal input to the nozzle to compensate for a decrease in the voltage of the power supply unit.
- the first control unit may be configured to adjust the duty ratio of the voltage PWM signal in inverse proportion to the magnitude of the voltage of the power supply unit.
- the second controller may be configured to determine a duty ratio of a received voltage based on the number of clock signals counted between a change time of an input voltage.
- the first PCB further includes a filter for filtering a signal received through the second power line communication, and the filter is a low pass for passing a frequency band used in the second power line communication method. pass) filter.
- the second motor may be a DC motor
- the second controller may be configured to perform second power line communication based on an instantaneous value of a voltage input to the second motor.
- the second control unit may be configured to drive the second motor based on an average value of a voltage input to the second motor.
- the second motor is an AC motor
- the second control unit applies a current ripple to the current input to the second motor to change the magnitude and frequency of the driving current of the AC motor from the DC component signal to the AC component signal.
- it may be configured to perform second powerline communication.
- the first control unit is configured to perform first power line communication based on a trigger signal
- the trigger signal is at least one of a signal input by a user and a recognition signal generated by a state change of the vacuum cleaner.
- the second control unit may be configured to perform the second power line communication in order to transmit information indicating a performance state of an operation corresponding to the information received through the first power line communication.
- the first control unit is configured to perform first power line communication at a predetermined time interval
- the second control unit transmits information indicating a state of performing an operation corresponding to information received through the first power line communication It may be configured to perform a second power line communication to
- the second control unit may be configured to perform the second power line communication based on whether a predetermined condition related to the nozzle is satisfied.
- the first control unit and the second control unit may be configured to execute the first power line communication and the second power line communication in a time division manner.
- any components may be directly connected or connected, and other components may be “interposed” between each component or each component It should be understood that may be “connected”, “coupled” or “connected” through other components.
- components may be subdivided for convenience of description, but these components may be implemented in one device or module, or one component may include multiple devices or modules. It may be implemented by being divided into .
- FIG. 1 is a block diagram of a vacuum cleaner 10 in which a main body and a head communicate through a power line communication method according to an embodiment.
- the vacuum cleaner 10 includes a power supply unit 130 configured to supply power, a first motor 120 generating suction force, and a first PCB 110 on which the first control unit 112 is mounted.
- a main body 100 provided with, and a cleaning unit 180, a second motor 170 for driving the cleaning unit 180, and a second PCB 160 equipped with a second control unit 162 are provided, and It may be composed of a nozzle 150 that is configured to suck air containing foreign substances.
- the first power line communication from the first control unit 112 to the second control unit 162 is voltage PWM (Pulse Width Modulation) and the second power line communication from the second control unit 162 to the first control unit 112 .
- PWM Pulse Width Modulation
- the second power line communication from the second control unit 162 to the first control unit 112 may be a current shaping method.
- the first control unit 162 may be configured to control at least one of the operation of the second motor 170 and the operation of the cleaning unit 180 through the first power line communication.
- the second control unit 162 may control operation state information of the second motor 170 , operation state information of the cleaning unit 180 , and a control operation received from the first controller 162 through the second power line communication. It may be configured to transmit at least one piece of information indicating that the execution is completed to the first control unit 162 .
- the nozzle 150 is a part that sucks external foreign substances in the vacuum cleaner 10 .
- the nozzle 150 may suction the foreign material in close contact with or close to the area where the foreign material is located in the space to be cleaned.
- the first motor 120 may provide a foreign substance suction force to the nozzle 150 . When the first motor 120 operates, a foreign material suction force may be generated in the nozzle 150 , and the foreign material may be sucked into the nozzle 150 and stored in the foreign material storage device.
- the nozzle 150 may suck the foreign material while moving the part where the foreign material is located.
- the nozzle 150 may be connected to the body 100 through a stick (not shown).
- the stick (not shown) communicates with the nozzle 150 and may provide a passage through which the sucked foreign material moves.
- the foreign material sucked into the nozzle 150 may pass through a stick (not shown) to reach the foreign material storage device.
- the stick (not shown) may be provided so that a user can use the cleaner comfortably, and the length can be adjusted.
- the first control unit 112 may be connected to the first motor 120 and control the output of the first motor 120 .
- the output of the first motor 120 needs to be properly controlled. If the output of the first motor 120 is insufficient, the foreign substance suction power may be lowered, and thus the efficiency of the cleaner may decrease or the cleaning time may increase. If the output of the first motor 120 is excessive, more power than necessary may be consumed. In particular, when the power supply unit 130 of the vacuum cleaner 10 corresponds to the battery, if the output of the first motor 120 is excessive, power consumption increases and the charging cycle of the battery is shortened, which may cause inconvenience to the user. . Accordingly, the first motor 120 needs to have an appropriate output so that the nozzle 150 has sufficient foreign material suction power and at the same time reduces power consumption.
- the amount of foreign substances sucked by the nozzle 150 may vary depending on the type of the cleaner, the capacity of the first motor 120 , the size of the cleaner, and other various factors.
- the actual foreign material suction amount may be different from the target suction amount set by the user due to the load applied to the cleaning unit 180 , and in this case, it may cause inconvenience to the user. Therefore, information on the state of the nozzle 150 is transmitted to the main body 100 through power line communication between the main body 100 and the nozzle 150 , or the main body 100 changes the amount of foreign material suctioned according to the state of the nozzle 150 . It is necessary to transmit information to the nozzle 150 to do so.
- the desired use of the vacuum cleaner 10 can be achieved through communication of various information such as a command by a user, status information, and an ACK for receiving a command.
- the second motor 170 included in the nozzle 150 may be configured to remove foreign substances through the cleaning unit 180 .
- the cleaning unit 180 has a rotation shaft formed to be long left and right, a brush unit including a brush protrudingly disposed on the outer periphery of the rotation shaft, a rotation cleaning unit provided to rotate in parallel with the cleaning surface, and a first motor 120 ) may include various configurations that can be configured to clean the cleaning surface by removing foreign substances, such as a suction passage for sucking air and foreign substances, according to the foreign substance suction power supplied by the .
- the second motor 170 may include at least one motor for driving the cleaning unit 180 .
- the second motor 170 may include a motor for driving the rotating cleaning unit, a pump or a spray nozzle for discharging water to the cleaning unit 180 .
- a load applied to the cleaning unit 180 depending on the foreign substances or the cleaning environment may decrease the efficiency of removing the foreign substances.
- the second control unit 162 may measure a load applied to the cleaning unit 180 to determine whether the cleaning unit 180 is being driven according to a target.
- the vacuum cleaner 10 may further include an additional sensor for detecting the driving speed of the cleaning unit 180 , and the second control unit 162 controls the cleaning unit 180 detected by the sensor. By comparing the speed and the speed corresponding to the operation command received from the main body 100 , the state information of the nozzle 150 may be determined and transmitted to the main body 100 .
- the second control unit 162 may sense a current flowing through the second motor 170 .
- the second control unit 1620 determines whether the result of sensing the current flowing in the second motor 170 is equal to or greater than a predetermined threshold current value, determines the state information of the nozzle 150, and communicates the second power line. may be transmitted to the main body 100 through
- the second controller 162 may stop the operation of the second motor 170 when the sensed current of the second motor 170 is less than a threshold current value.
- the second control unit 162 the current of the sensed second motor 170 is less than the threshold current value, when the time sensed to be less than the threshold current value is greater than or equal to a predetermined threshold time, the second motor The operation of 170 can be stopped.
- information on the second changed state of the nozzle 150 may be transmitted to the main body 100 .
- the information indicating the operating state included in the nozzle 150 does not need to be interpreted as being limited to the above example, and various information indicating the current state or state change of the nozzle 150 can be transmitted and received through power line communication. have.
- the vacuum cleaner 10 is disposed between the main body 100 and the nozzle 150 by the first power line communication and the second power line communication performed by the first control unit 112 and the second control unit 162 . Additional wiring for separate wireless communication may not be required. That is, power is supplied from the main body 100 to the nozzle 150 through the power supply unit 130 to drive the second motor 170 and/or the cleaning unit 180, and a power line for supplying such power may be connected. Communication between the main body 100 and the nozzle 150 may be implemented through this. Power line communication is to transmit and receive information using a power line, and various speed communication technologies for controlling home appliances or transmitting and receiving information required for home networking and multimedia networks have been proposed.
- a data signal may be modulated into a specific signal (eg, a high frequency signal) and transmitted on a line carrying an AC current.
- a specific signal eg, a high frequency signal
- Power line communication has the advantage of being able to build a communication network at low cost without installing a special additional communication line using an already secured power line.
- the first power line communication and the second power line communication are different communication methods.
- the first control unit 112 may modulate a voltage to be transmitted to the nozzle 150 by using a voltage PWM.
- the first control unit 112 may modulate the frequency of the voltage to be transmitted to the nozzle 150 through the voltage PWM.
- the first control unit 112 may communicate with the second control unit 162 by presetting a relationship between the frequency band of the voltage PWM signal and information indicated by the corresponding frequency.
- the first controller 112 may modulate the frequency of the voltage based on a predetermined frequency for changing the operating speed of the second motor 170 .
- the signal for setting the speed of the motor of the second motor 170 to the first speed may be a voltage modulated with a frequency of 1.2 kHz, and the speed of the motor of the second motor 170 is set to the second speed.
- the signal to be set to may be a voltage modulated with a frequency of 1.5 kHz.
- the first control unit 112 may modulate the frequency of the voltage based on a predetermined frequency for changing the operating speed of the cleaning unit 180 .
- the signal for setting the operation of the cleaning unit 180 to the on state may be a voltage modulated with a frequency of 1.1 kHz
- the signal for setting the operation of the cleaning unit 180 to the off state is 1.4 kHz It may be a voltage modulated with a frequency of .
- the command operation or frequency indicated by the above frequency-modulated signal is only an example for explaining the first power line communication method of the voltage PWM method, the relationship between the specific operation and the frequency does not need to be interpreted as being limited to the above.
- the second control unit 162 may communicate with the first control unit 112 through a current in which at least one of a magnitude and a frequency is modulated through a current shaping method.
- the second control unit 162 may communicate with the first control unit 112 by presetting a frequency band indicated by the frequency of the current flowing from the nozzle 150 to the main body 100 .
- the second control unit 162 may modulate the frequency of the current based on a predetermined frequency for transmitting the operating state of the second motor 170 to the main body 100 .
- a signal for indicating that the motor of the second motor 170 is operating at the first speed may be a current modulated with a frequency of 150 kHz, and the motor of the second motor 170 operates at the second speed.
- the signal for indicating that it is in the middle may be a current modulated at a frequency of 250 kHz.
- the second control unit 162 may modulate the frequency of the current based on a predetermined frequency for transmitting the operating state of the cleaning unit 180 to the main body 100 .
- a signal for indicating that the cleaning unit 180 is in an on state may be a current modulated with a frequency of 100 kHz
- a signal indicating that the cleaning unit 180 is in an off state may be a current modulated with a frequency of 200 kHz
- the first power line communication and the second power line communication may be implemented in a time division communication scheme.
- the power line communication signal transmitted from the first control unit 112 and the second control unit 162 does not occupy the power line 2-Wire at the same time, and any communication protocol having a predetermined signal transmission order
- the first power line communication and the second power line communication can be implemented in a way that has Accordingly, in the power line communication process between the main body 100 and the nozzle 150 , the transmission/reception signal does not always occupy the power line and may be used for intermittent communication only when necessary.
- the first power line communication and the second power line communication may be implemented in an asynchronous communication method.
- a clock signal for synchronizing timing for signal transmission and reception is not shared between the main body 100 and the nozzle 150 through the first power line communication and the second power line communication performed asynchronously according to an embodiment. you don't have to As the asynchronous communication method is implemented, the main body 100 and the nozzle 150 do not need to match each work processing unit at the same time, so the processing time based on the signal transmitted and received by the main body 100 and the nozzle 150 through the power line communication does not match. It is possible to efficiently perform the operation of the vacuum cleaner 10 is not required.
- the first power line communication and the second power line communication may be implemented using an asymmetric communication method.
- the first power line communication is a method using voltage PWM
- the second power line communication uses a current shaping method.
- the current shaping method is a method of performing mutual communication based on a predetermined frequency for a signal recognized by the receiving side and preset information corresponding thereto by modulating the magnitude and/or frequency of the transmitted and received current.
- FIG. 2 illustrates a process of transmitting a signal from the nozzle to the main body through second power line communication when a signal is transmitted from the main body to the nozzle through the first power line communication according to an embodiment.
- the first control unit 112 may transmit a predetermined signal to the second control unit through the first power line communication.
- the frequency modulation of the voltage may be performed when the voltage PWM is performed due to the first power line communication.
- the second control unit 162 may receive the voltage PWM signal, and may control the operation of the nozzle 150 based on the received voltage signal.
- the signal received by the second control unit 162 through the first power line communication may be a signal for controlling the operation of the second motor 170 and/or the cleaning unit 180 .
- the first control unit 112 is configured to perform first power line communication based on a trigger signal, and the trigger signal is a signal input by a user and recognition generated by a change in state of the vacuum cleaner 10 . It may include at least one of the signals.
- the second control unit 162 may be configured to perform the second power line communication in order to transmit information indicating a state of performing an operation corresponding to the information received through the first power line communication.
- the second control unit 162 generates a signal indicating that the operation of the second motor 170 and/or the cleaning unit 180 is completed on the basis of receiving the voltage PWM signal from the first control unit 112 . 1 In order to transmit to the control unit 112, a second power line communication may be performed.
- the second control unit 162 may perform second power line communication to transmit an ACK signal indicating that the voltage PWM signal has been received from the first control unit 112 to the first control unit 112 .
- the first control unit 112 is configured to perform first power line communication at a predetermined time interval
- the second control unit 162 performs an operation corresponding to information received through the first power line communication.
- the main body 100 may acquire predetermined information from the nozzle 150 through the second power line communication corresponding thereto by periodically performing the first power line communication at a predetermined time interval.
- Information transmitted and received through the first and second power line communication performed at predetermined time intervals is various may contain information.
- FIG 3 is a process of transmitting a signal from the main body 100 to the nozzle 150 through the first power line communication when a signal is transmitted from the nozzle 150 to the main body 100 through the second power line communication according to an embodiment. shows
- the second control unit 162 may perform second power line communication for transmitting information indicating the current state of the nozzle 150 to the first control unit 112 .
- the first control unit 112 that receives the information indicating the current state of the nozzle 150 through the second power line communication analyzes the current state of the nozzle 150 and the second control unit included in the nozzle 150 .
- the first power line communication may be performed to control the operation of the controller 162 and/or the cleaning unit 180 .
- a process in which the second control unit 162 transmits information indicating the current state of the nozzle 150 to the first control unit 112 through the second power line communication may be performed at any or predetermined time intervals.
- the process in which the second control unit 162 transmits information indicating the current state of the nozzle 150 to the first control unit 112 through the second power line communication is performed by the second motor 170 of the nozzle 150 .
- a state change occurring in the cleaning unit 180 is recognized and may be performed when a predetermined condition is satisfied. For example, when it is determined that the current flowing through the second motor 170 is equal to or greater than the threshold current value, the second control unit 162 performs a second power line communication to inform the first control unit 112 of the state of the nozzle 150 . information can be transmitted.
- FIG 4 illustrates a process in which the main body 100 and the nozzle 150 continuously communicate through a first power line communication and a second power line communication according to an embodiment.
- the first control unit 112 and the second control unit 162 may continuously transmit and receive signals through the first power line communication and the second power line communication. That is, the transmission of a predetermined signal between the first control unit 112 and the second control unit 162 may be performed based on information received through power line communication of the other party.
- the second control unit 162 may transmit information on the state of the nozzle 150 to the first control unit 112 through the second power line communication.
- the first control unit 112 receiving the information on the state of the nozzle 150 is a predetermined signal (eg, the state of the nozzle 150 ) based on the information on the state of the nozzle 150 .
- a signal for changing the operating state of the second control unit 170 and/or the cleaning unit 180) based on the information on ' may be transmitted to the second control unit 162 through first power line communication.
- the second control unit 162 that has received the above predetermined signal through the first power line communication controls the nozzle 150 based on the ACK signal indicating that the predetermined signal has been received and the received predetermined signal.
- a signal indicating that the operation state has been changed or a signal indicating that the operation state of the nozzle 150 cannot be changed based on a received predetermined signal may be transmitted to the first control unit 112 through the second power line communication. have.
- the first power line communication and the second power line communication may perform an operation control process between the main body 100 and the nozzle 150 by transmitting each signal to the other party in a time division communication method.
- FIG. 5 is a diagram for explaining a power supply voltage compensation algorithm for compensating for a voltage supplied to a nozzle according to a decrease in the voltage of the power supply unit 130 according to an embodiment.
- the first control unit 112 adjusts the voltage supplied to the second PCB 160 included in the nozzle 150 based on the change in the voltage of the power supply unit 130 in performing the voltage PWM. It enables the control of the second motor 170 stably and secures a maximum duty rate to perform power line communication adaptive to the magnitude of the input voltage of the power supply unit 130 for the second power line communication.
- a voltage compensation algorithm of the power supply unit 130 may be performed.
- the first control unit 112 may increase the voltage supplied to the nozzle 150 by increasing the duty ratio when PWM of the voltage is performed.
- the first control unit 112 may reduce the voltage supplied to the nozzle 150 by reducing the duty ratio when PWM of the voltage is performed. As such, the first control unit 112 may secure the performance of the first power line communication by adaptively adjusting the duty ratio of the voltage supplied to the nozzle 150 through the first power line communication to the voltage of the power supply unit 130 . .
- the first control unit 112 when the voltage from the power supply unit 130 is 20V, the first control unit 112 performs voltage PWM by setting the duty ratio as high as 97%, and the voltage from the power supply unit 130 is 30V. In this case, voltage PWM can be performed by setting the duty ratio as low as 90%. According to an embodiment, the first control unit 112 may adjust the voltage and the duty ratio of the power supply unit 130 according to a preset slope S.
- the voltage and duty ratio of the power supply unit 130 is adjusted according to the slope (S) of -2.73047, and the first control unit 112 controls the voltage and slope ( Voltage PWM may be performed with a duty ratio calculated based on S).
- Voltage PWM may be performed with a duty ratio calculated based on S.
- the power supply voltage compensation algorithm performed by the first control unit 112 does not need to be interpreted as being limited to the values of the voltage, duty ratio, and slope of FIG. 5 and the above-described embodiment, and the voltage PWM is based on the voltage of the power supply unit 130 .
- Various embodiments capable of adjusting the duty ratio may be broadly interpreted as being included therein.
- the first control unit 112 may perform a compensation algorithm for ensuring the second power line communication for each condition related to the current input performance or the frequency of the input signal.
- FIG. 6 is a diagram for explaining a process in which a second control unit determines a pulse width of a voltage of a signal received through first power line communication, according to an exemplary embodiment.
- the second control unit 162 may measure the frequency of the voltage PWM signal received through the first power line communication. According to an exemplary embodiment, the second control unit 162 may measure a time interval between time points at which the input voltage is changed. According to an embodiment, the second control unit 162 may determine the pulse width of the received signal based on how many times the clock signal is counted between the times when the received voltage PWM signal is changed. According to an embodiment, the second control unit 162 may be configured to determine the duty ratio of the received voltage PWM signal based on the number of clock signals counted between the change times of the input voltage.
- the second control unit 162 determines that the pulse width and/or frequency value of the received voltage PWM signal is only on time between a rising edge time and a falling edge time point. measurement, only the off-time between the time of the falling edge and the time of the rising edge may be measured, or the period in which the on-time and the off-time are combined. Accordingly, the second control unit 162 controls the pulse width and/or frequency of the voltage PWM signal received by the second control unit 162 based on at least one of the measured on-time, off-time, on-time, and off-time periods. can be decided
- FIG. 7 is a diagram for explaining a method for the second control unit 162 to perform power line communication and control the speed of the second motor 170 when the second motor 170 is a DC motor according to an embodiment .
- the DC motor may be controlled in such a way that it has a change in PWM duty with time.
- the rotation speed of the DC motor may be determined according to the input voltage of the second motor 170 determined based on the average value of the PWM duty.
- the second control unit 162 may be configured to increase the average value of the PWM duty in order to increase the rotation speed of the DC motor.
- the second control unit 162 determines the frequency for the second power line communication based on the instantaneous value of the PWM duty. According to an embodiment, the second controller 162 controls the speed of the second motor 170 by controlling the average value of the voltage input to the second motor 170 , and controls the speed of the voltage input to the second motor 170 . Second power line communication can be performed through frequency modulation of the current caused by controlling the instantaneous value. Even if the voltage input to the second motor 170 is constant, the second control unit 162 uses a change in the duty of the voltage, the average value of the voltage input to the second motor 170 and the input to the second motor 170 . Since it is possible to control the change in the frequency of the current, respectively, it is possible to control the operation of the second motor 170 and perform the second power line communication at the same time.
- FIG 8 is a diagram for explaining a method for the second control unit 162 to perform power line communication and control the speed of the second motor 170 when the second motor 170 is an AC motor according to an embodiment .
- the second control unit 162 injects a current (or torque) ripple when inputting a current to an AC motor (ie, an AC motor) to generate a signal of an AC component instead of DC to generate a power line current. It is possible to implement power line communication of a current shaping method.
- the second control unit 162 directly changes the output torque among the Q-axis current for controlling the output torque of the second motor 170 and the D-axis current for controlling the magnetic flux of the second motor 170 .
- a method of generating a signal to be transmitted through power line communication can be used based on the magnitude and frequency of the Q-axis current that causes .
- a harmonic component is included in the phase current of the second motor 170 .
- superimposed waveforms may appear.
- the frequency of the current having the individual phases is generated by the first frequency determining the driving speed of the second motor 170, and the frequency component injected for the second power line communication may include two frequency components (ie, second and third frequency components).
- the remaining harmonic components eg, PWM switching, distortion component by 1-shunt phase current measurement method
- PWM switching e.g., PWM switching, distortion component by 1-shunt phase current measurement method
- the second and third frequency components injected for the second power line communication may be determined by subtracting or adding a power line frequency value from the first frequency component.
- the magnitude of the frequency used for shaping the current in the second power line communication is less than the driving frequency magnitude of the second motor 170 .
- the relationship between the first, second, and third frequency components may correspond to the relationship shown in Equation 1 below.
- the first frequency component is the largest
- the second and third frequency components have smaller values than the first frequency component
- the remaining The magnitude of the harmonic component may be understood to have a smaller value than the magnitude of the second and third frequency components.
- f e represents a first frequency that is a driving frequency of the second motor 170
- f PLC represents a frequency injected for the second power line communication
- FIG. 9 illustrates a configuration of a circuit included in the second PCB 950 of the nozzle 150 for receiving a signal through the first power line communication according to an embodiment.
- the first PCB 900 and the second PCB 950 may correspond to the first PCB 110 and the second PCB 160 shown in FIG. 1 and may be spaced apart from each other.
- components such as C Line and C DS shown in FIG. 9 may be understood as parasitic components existing between the first PCB 900 and the second PCB 950 .
- the first PCB 900 including the first control unit 112 is a power supply to the second PCB 950 including the second control unit 162 through the first power line communication using the voltage PWM method.
- a switch element eg, MOSFET for supplying an average voltage may be provided.
- the first PCB 900 includes a diode D3 for forcing the direction of the current in order to prevent deterioration of the capacitor (C o ) reliability caused by the flow of the large-capacity charge/discharge current by the voltage PWM. can do.
- the first PCB 900 may include distribution resistors R1 and R2 for reducing the voltage of the power supply unit 130 to the level of the supply voltage of the second control unit 162 .
- the first PCB 900 may include divider resistors R3 and R4 for generating a reference voltage of the comparator.
- the analog voltage signal V sen input to the comparator through the reference voltage of the comparator may be converted into a digital signal V out in the form of a pulse.
- the pulse width of the signal converted to the pulse form may be measured through a timer counter or encoder module function of the second controller 162 .
- a signal (V out ) obtained by converting a voltage PWM signal that is an analog voltage signal (V sen ) into a digital signal is to be connected to a pin (Pin) configured to allow the second control unit 162 to perform the above-described embodiments.
- FIG. 10 is a view for explaining a characteristic in which a signal received through second power line communication is filtered through a filter included in the first PCB 160 of the main body 100 of the vacuum cleaner 10 according to an embodiment. .
- a frequency component used for the second power line communication may pass through the filter 1100 .
- the signal input to the first control unit 112 through the OP-Amp amplification circuit detects the frequency of the current received through the second power line communication through high-speed ADC sampling (Analog-to-Digital Conversion Sampling).
- the filter may be designed by minimizing the difference between the power line communication frequency and the cutoff frequency f c of the filter so that the maximum frequency value for power line communication is not attenuated by -3 dB or more.
- the range of the communication frequency at which the first control unit 112 can receive predetermined information through the second power line communication may be 100 Hz to 400 Hz, and the cut-off frequency f c of the filter 1100 is 500 Hz.
- the frequency used for power line communication is passed using the filter 1100, and other frequency components (eg, PWM switching frequency, current fluctuation frequency by the phase current measurement method (1-Shunt), etc.)
- a time constant value based on R and C included in the filter 1100 may be preset to block .
- recognition of simple information such as a state such as mounting/dismounting of the nozzle 150 or an abnormal state such as restraint/failure may be performed through low-speed ADC sampling of several ms level, and relatively large amounts of data
- relatively high-speed ADC sampling may be performed to detect the frequency of the received current.
- the first control unit 112 and/or the second control unit 162 have low specifications, it is possible to shorten and minimize the execution time through the optimization of the code for the power line communication, so information through the second power line communication is possible.
- the elements on the first PCB 160 that receive the ? can be implemented at low cost.
- the vacuum cleaner 10 may further include a computer-readable recording medium or memory (not shown) for recording programs for performing the various methods described above.
- the power line communication method of the vacuum cleaner 10 according to the present disclosure described above may be provided by being recorded in a computer-readable recording medium as a program for execution by a computer.
- the method of the present disclosure may be executed through software.
- the constituent means of the present disclosure are code segments that perform necessary tasks.
- the program or code segments may be stored on a processor-readable medium.
- the computer-readable recording medium includes all kinds of recording devices in which data readable by a computer system is stored. Examples of the computer-readable recording device include ROM, RAM, CD-ROM, DVD ⁇ ROM, DVD-RAM, magnetic tape, floppy disk, hard disk, and optical data storage device. In addition, the computer-readable recording medium may be distributed in network-connected computer devices so that the computer-readable code can be stored and executed in a distributed manner.
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Abstract
Description
Claims (15)
- 진공 청소기에 있어서,전력을 공급하도록 구성되는 전원부, 흡입력을 발생시키는 제1 모터, 및 제1 제어부가 장착된 제1 PCB를 구비하는 본체; 및청소 유닛, 상기 청소 유닛을 구동시키기 위한 제2 모터 및 제2 제어부가 장착된 제2 PCB를 구비하고 상기 흡입력에 의해 이물질을 포함하는 공기를 흡입하도록 구성되는 노즐을 포함하고,상기 제1 제어부로부터 상기 제2 제어부로의 제1 전력선 통신은 전압 PWM(Pulse Width Modulation)이고 상기 제2 제어부로부터 상기 제1 제어부로의 제2 전력선 통신은 전류 형상화(shaping) 방식인, 진공 청소기.
- 제 1 항에 있어서,상기 제1 전력선 통신은 상기 제1 제어부에서 상기 제2 제어부로 전달되는 전압의 주파수를 변조하는 방식인, 진공 청소기.
- 제 1 항에 있어서,상기 제2 전력선 통신은 상기 제2 제어부에서 상기 제1 제어부로 전달되는 전류의 크기 및 주파수 중 적어도 하나를 변조하는 방식인, 진공 청소기.
- 제 1 항에 있어서,상기 제1 제어부는 상기 제1 전력선 통신을 통해 상기 제2 모터의 동작 및 상기 청소 유닛의 동작 중 적어도 하나를 제어하도록 구성되는, 진공 청소기.
- 제 1 항에 있어서,상기 제2 제어부는 상기 제2 전력선 통신을 통해 상기 제2 모터의 동작 상태 정보, 상기 청소 유닛의 동작 상태 정보, 상기 제1 제어부로부터 수신된 제어 동작이 수행 완료됨을 나타내는 정보 중 적어도 하나를 상기 제1 제어부로 전송하도록 구성되는, 진공 청소기.
- 제 1 항에 있어서,상기 제1 제어부는 상기 전원부의 전압의 크기가 감소하게 되는 것을 보상하기 위해 상기 노즐로 입력되는 전압 PWM 신호의 듀티 비(duty rate)를 조절하도록 구성되는, 진공 청소기.
- 제 6 항에 있어서,상기 제1 제어부는 상기 전원부의 전압의 크기와 반비례하게 상기 전압 PWM 신호의 듀티 비를 조절하도록 구성되는, 진공 청소기.
- 제 1 항에 있어서,상기 제2 제어부는 입력되는 전압의 변화 시간 사이에 카운팅되는 클럭(clock) 신호를 개수에 기초하여 수신되는 전압의 듀티 비를 결정하도록 구성되는, 진공 청소기.
- 제 1 항에 있어서,상기 제1 PCB는 상기 제2 전력선 통신을 통해 수신되는 신호를 필터링하기 위한 필터를 더 포함하고,상기 필터는 상기 제2 전력선 통신에서 이용되는 주파수 대역을 통과시키기 위한 로우 패스(low pass) 필터인, 진공 청소기.
- 제 1 항에 있어서,상기 제2 모터는 DC 모터이고,상기 제2 제어부는 상기 제2 모터로 입력되는 전압의 순시값(instantaneous value)에 기초하여 상기 제2 전력선 통신을 수행하도록 구성되는, 진공 청소기.
- 제 10 항에 있어서,상기 제2 제어부는 상기 제2 모터로 입력되는 전압의 평균값에 기초하여 상기 제2 모터를 구동시키도록 구성되는, 진공 청소기.
- 제 1 항에 있어서,상기 제2 모터는 AC 모터이고,상기 제2 제어부는 상기 AC 모터의 구동 전류의 크기 및 주파수를 DC 성분 신호에서 AC 성분 신호로 변경하기 위해 상기 제2 모터에 입력되는 전류에 전류 리플을 추가하여 상기 제2 전력선 통신을 수행하도록 구성되는, 진공 청소기.
- 제 1 항에 있어서,상기 제1 제어부는 트리거 신호에 기초하여 상기 제1 전력선 통신을 수행하도록 구성되고,상기 트리거 신호는 사용자에 의해 입력된 신호 및 상기 진공 청소기의 상태 변화에 의해 발생된 인지신호 중 적어도 하나를 포함하는, 진공 청소기.
- 제 13 항에 있어서,상기 제2 제어부는 상기 제1 전력선 통신을 통해 수신한 정보에 대응되는 동작의 수행 상태를 나타내는 정보를 전송하기 위해 상기 제2 전력선 통신을 수행하도록 구성되는, 진공 청소기.
- 제 1 항에 있어서,상기 제1 제어부는 미리 결정된 시간 간격으로 상기 제1 전력선 통신을 수행하도록 구성되고,상기 제2 제어부는 상기 제1 전력선 통신을 통해 수신한 정보에 대응되는 동작의 수행 상태를 나타내는 정보를 전송하기 위해 상기 제2 전력선 통신을 수행하도록 구성되는, 진공 청소기.
Priority Applications (4)
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US17/910,866 US20230104985A1 (en) | 2020-05-12 | 2020-11-11 | Vacuum cleaner capable of power line communication |
CN202080100704.XA CN115515463B (zh) | 2020-05-12 | 2020-11-11 | 提供有电力线通信的真空吸尘器 |
AU2020447556A AU2020447556B2 (en) | 2020-05-12 | 2020-11-11 | Vacuum cleaner capable of power line communication |
EP20935398.6A EP4079207A4 (en) | 2020-05-12 | 2020-11-11 | VACUUM CLEANER THAT CAN COMMUNICATE BY POWER LINE |
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KR10-2020-0056558 | 2020-05-12 | ||
KR1020200056558A KR102389311B1 (ko) | 2020-05-12 | 2020-05-12 | 전력선 통신이 제공되는 진공 청소기 |
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WO2021230446A1 true WO2021230446A1 (ko) | 2021-11-18 |
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US (1) | US20230104985A1 (ko) |
EP (1) | EP4079207A4 (ko) |
KR (2) | KR102389311B1 (ko) |
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WO2023200174A1 (ko) * | 2022-04-15 | 2023-10-19 | 삼성전자 주식회사 | 청소기 본체 및 브러시 장치 간에 통신 가능한 무선 청소기 |
WO2024043718A1 (ko) * | 2022-08-26 | 2024-02-29 | 삼성전자 주식회사 | 무선 청소기 및 무선 청소기의 동작 방법 |
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2020
- 2020-05-12 KR KR1020200056558A patent/KR102389311B1/ko active IP Right Grant
- 2020-11-11 EP EP20935398.6A patent/EP4079207A4/en active Pending
- 2020-11-11 CN CN202080100704.XA patent/CN115515463B/zh active Active
- 2020-11-11 WO PCT/KR2020/015766 patent/WO2021230446A1/ko unknown
- 2020-11-11 AU AU2020447556A patent/AU2020447556B2/en active Active
- 2020-11-11 US US17/910,866 patent/US20230104985A1/en active Pending
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2022
- 2022-04-18 KR KR1020220047677A patent/KR102522614B1/ko active IP Right Grant
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KR100798325B1 (ko) * | 2006-08-07 | 2008-01-28 | 주식회사 대우일렉트로닉스 | 스팀-진공 겸용 청소기 |
JP2008113961A (ja) * | 2006-11-07 | 2008-05-22 | Toshiba Corp | 電気掃除機 |
KR20160019932A (ko) * | 2013-06-13 | 2016-02-22 | 다이슨 테크놀러지 리미티드 | 표면 청소 기구 |
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KR20200039348A (ko) * | 2018-10-05 | 2020-04-16 | 엘지전자 주식회사 | 청소기 및 그것의 제어방법 |
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Also Published As
Publication number | Publication date |
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CN115515463B (zh) | 2024-03-01 |
EP4079207A1 (en) | 2022-10-26 |
CN115515463A (zh) | 2022-12-23 |
KR102389311B1 (ko) | 2022-04-21 |
KR102522614B1 (ko) | 2023-04-18 |
AU2020447556A1 (en) | 2022-08-18 |
AU2020447556B2 (en) | 2024-01-25 |
EP4079207A4 (en) | 2023-11-22 |
KR20220054268A (ko) | 2022-05-02 |
US20230104985A1 (en) | 2023-04-06 |
KR20210138342A (ko) | 2021-11-19 |
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