EP1897479B1 - Procédé de commande d'un aspirateur - Google Patents

Procédé de commande d'un aspirateur Download PDF

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Publication number
EP1897479B1
EP1897479B1 EP07101390.8A EP07101390A EP1897479B1 EP 1897479 B1 EP1897479 B1 EP 1897479B1 EP 07101390 A EP07101390 A EP 07101390A EP 1897479 B1 EP1897479 B1 EP 1897479B1
Authority
EP
European Patent Office
Prior art keywords
dusts
dust collection
amount
unit
pressing member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP07101390.8A
Other languages
German (de)
English (en)
Other versions
EP1897479A2 (fr
EP1897479A3 (fr
Inventor
Gun Ho Ha
Jin Wook Seo
Chang Ho Yun
Jin Young Kim
Chang Hoon Lee
Yun Hee Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP1897479A2 publication Critical patent/EP1897479A2/fr
Publication of EP1897479A3 publication Critical patent/EP1897479A3/fr
Application granted granted Critical
Publication of EP1897479B1 publication Critical patent/EP1897479B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • A47L9/2889—Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user
    • 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
    • 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
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/106—Dust removal
    • A47L9/108—Dust compression means
    • 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
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/19—Means for monitoring filtering operation
    • 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
    • A47L9/281—Parameters or conditions being sensed the amount or condition of incoming dirt or dust
    • 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
    • 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
    • A47L9/2857—User input or output elements for control, e.g. buttons, switches or displays

Definitions

  • the present invention relates to a vacuum cleaner control method, and more particularly, to a vacuum cleaner control method that can allow the vacuum cleaner to suck dusts with a uniform suction by varying a driving force of the suction motor in accordance with an amount of the dusts stored in a dust collection unit.
  • a vacuum cleaner is a device that can suck air containing dusts using vacuum pressure generated by a suction motor mounted in a main body and filter off the dusts in a main body.
  • the vacuum cleaner is classified into a canister type and an upright type.
  • the canister type vacuum cleaner includes a main body and a suction nozzle connected to the main body by a connection pipe.
  • the upright type vacuum cleaner includes a main body and a suction nozzle integrally formed with the main body.
  • a dust collection unit mounted in a cyclone type vacuum cleaner separates dusts from air using a cyclone principle and the air whose dusts are removed is discharged out of the main body.
  • the cyclone dust collection unit includes a dust collection body, an air inlet through which the air is sucked into the dust collection body, a cyclone unit for separating dusts from the air sucked into the dust collection body, a dust storing unit for storing the separated dusts, and an air outlet through which the air whose dusts are filtered off in the cyclone unit is discharged.
  • the dusts stored in a lower space of the dust collection body i.e., in the dust storing unit, rotates along an inner circumference of the dust collection body by a rotational current generated in the dust collection body during the operation of the vacuum cleaner.
  • the suction force of the vacuum cleaner is reduced as an amount of the dusts sucked into the dust collection unit increases.
  • the suction motor is driven with a uniform driving force (e.g., 100kW).
  • EP 0373353 A1 discloses a method for controlling a vacuum cleaner including an air turbine that measures the airflow rate in the vacuum cleaner immediately behind a motor driven suction blower and behind a dust bag of the vacuum cleaner. A detected difference of the airflow rate is used as an indication of the filling rate of dust stored in the dust bag and is further used as a parameter to control the motor of the vacuum cleaner and to display the operation states to a user. An increased filling amount of the dust bag is compensated by an increase of the power of the motor of the suction blower.
  • the present invention is directed to a vacuum cleaner control method that substantially obviates one or more problems due to limitations and disadvantages of the related art.
  • An object of the present invention is to provide a vacuum cleaner control method that can uniformly maintain suction efficiency of the vacuum cleaner even when an amount of dusts collected in the dust collection unit increases.
  • a method of controlling a vacuum cleaner having a dust collection unit in which dusts separated from air sucked by a suction motor are stored including: the features of claim 1.
  • a method of controlling a vacuum cleaner having a dust collection unit in which dusts separated from air sucked by a suction motor is stored including: operating the suction motor; determining an amount of the dusts stored in the dust collection unit; and stopping the operation of the suction motor when the amount of the dusts is greater than a reference amount.
  • the dusts stored in the dust collection unit is compressed by a pair of the pressing members and thus the volume thereof can be minimized, the dust collection capacity in the dust collection unit can be maximized.
  • the compression state of the dusts in the dust collection unit can be maintained even when the operation of the vacuum cleaner is stopped, the dusts stored in the dust collection unit can be easily discharged during empting the dust collection unit.
  • the user can easily know the dust collection unit empty timing.
  • the vacuum cleaner since the driving force of the suction motor varies in accordance with a variation of an amount of dusts collected in the dust collection unit, the vacuum cleaner has a uniform suction force.
  • Fig. 1 is a perspective view of a dust collection unit of a vacuum cleaner according to an embodiment of the present invention, when the dust collection unit is separated from the vacuum cleaner;
  • Fig. 2 is a perspective view of a dust collection mounting portion and a dust collection unit of the vacuum cleaner of Fig. 1 , when the dust collection unit is separated from the dust collection unit mounting portion;
  • Fig. 3 is a partially-cutaway perspective view of the dust collection unit
  • Fig. 4 is an enlarged view of a portion A in Fig. 3 ;
  • Fig. 5 is a perspective view illustrating a coupling arrangement between a dust collection unit and a driving unit provided to compress the dusts stored in the dust collection unit;
  • Fig. 6 is a perspective view of a dust separating unit and a dust collection container of the dust collection unit
  • Fig. 7 is a lower perspective view of Fig. 6 ;
  • Figs. 8 and 9 is a flowchart illustrating a compression process of dusts in the dust collection unit
  • Fig. 10 is a top view illustrating an operation state of a first pressing member when a dust discharge alarming is performed
  • Fig. 11 a block diagram illustrating a control unit of a vacuum cleaner according to an embodiment of the present invention
  • Fig. 12 is a flowchart illustrating a dust compressing process in the dust collection unit and a dust discharge alarming
  • Fig. 13 is a waveform of a pulse signal that varies in accordance with an amount of the dusts collected in the dust collection unit;
  • Fig. 14 is a flowchart illustrating a control method of a suction motor according to an embodiment of the present invention.
  • Fig. 15 is a view illustrating a relationship between an amount of dusts and a suction force of a suction motor according to the prior art.
  • Fig. 16 is a view illustrating a relationship between an amount of dusts and a suction force of a suction motor according to an embodiment of the present invention.
  • Fig. 1 is a perspective view of a dust collection unit of a vacuum cleaner according to an embodiment of the present invention, when the dust collection unit is separated from the vacuum cleaner.
  • a vacuum cleaner includes a main body 100 in which a suction for generation unit for generating vacuum pressure in the vacuum cleaner is provided and a dust collection unit 200 for separating the dusts in air and storing the same.
  • the vacuum cleaner includes a suction nozzle 20 sucking the air containing the dusts, a handle 40 allowing the user to manipulate the operation of the vacuum cleaner, an extension pipe 30 connecting the suction nozzle 20 to the handle 40, and a connection hose 50 connecting the suction nozzle 20 to the main body 100.
  • suction nozzle 20 the extension 30, the handle 40, and the connection hose 50 are well known in the art, the detailed description thereof will be omitted herein.
  • suction nozzle and the extension pipe are well known in the art, the detailed description thereof will be omitted herein.
  • a main body suction portion 110 through which the air containing the dusts are sucked through a suction nozzle 20 is formed at a front-lower end of the main body 100.
  • the dust collection unit 200 includes a dust separation portion 210 for separating the dusts from the air and a dust collection container 220 for storing the dusts separated from the dusts.
  • the dust separation unit 210 includes a cyclone unit 211 that separate the dusts from the air using a cyclone theory, i.e., a centrifugal force difference. Therefore, the dusts separated by the cyclone unit 211 are stored in the dust collection container 220.
  • a cyclone theory i.e., a centrifugal force difference. Therefore, the dusts separated by the cyclone unit 211 are stored in the dust collection container 220.
  • the dust collection unit 200 is designed to maximize the dust collection capacity of the dusts stored therein. Therefore, the dust collection unit 200 is preferably provided with additional unit for minimizing the volume of the dusts stored in the dust collection container 220.
  • Fig. 2 is a perspective view of a dust collection mounting portion and a dust collection unit of the vacuum cleaner of Fig. 1 , when the dust collection unit is separated from the dust collection unit mounting portion,
  • Fig. 3 is a partially-cutaway perspective view of the dust collection unit,
  • Fig. 4 is an enlarged view of a portion A in Fig. 3 , and
  • Fig. 5 is a perspective view illustrating a coupling arrangement between a dust collection unit and a driving unit provided to compress the dusts stored in the dust collection unit;
  • the dust collection unit 200 is detachably mounted on the main body 100.
  • the main body 100 is provided with a dust collection unit mounting portion 130 on which the dust collection unit 200 is mounted.
  • a pair of pressing members 310 and 320 are provided in the dust collection unit 200 to reduce the volume of the dusts stored in the dust collection container 220, thereby increasing the dust collection capacity.
  • the pair of pressing members 310 and 320 compress the dusts by the interaction thereof and thus reduce the volume of the dusts. Therefore, the density of the dusts stored in the dust collection container 220 increases and thus the maximum dust collection capacity of the dust collection container 220 increases.
  • the pair of the pressing members 310 and 320 are respectively referred as first and second pressing members 310 and 320.
  • At least one of the first and second pressing members 310 and 320 is movably provided in the dust collection container 220 so that the dusts are effectively compressed by the pressing members 310 and 320.
  • the first and second pressing members 310 and 320 when the first and second pressing members 310 and 320 are rotatably provided in the dust collection container 220, the first and second pressing members 310 and 320 rotate and move toward each other so that a gap between the first and second plates 310 and 320 is reduced and thus the dusts between the first and second plates 310 and 320 are compressed.
  • the first pressing member 310 is rotatably provided in the dust collection container 220 and the second pressing member 220 is fixed in the dust collection container 220.
  • the first pressing member 310 becomes a rotational plate and the second pressing member 310 becomes a stationary plate.
  • the dust collection container 220 is provided with a dust storing portion 221 defining a space on which the dusts are stored.
  • the dust storing unit 221 is formed surrounding a rotational locus of a free end 311 of the first pressing member 310.
  • the second pressing member 320 may be provided between an axis of the rotational shaft 312, which is a rotational center of the first pressing member 310, and an inner circumference of the dust storing portion 221.
  • the second pressing member 320 is provided on a plan connecting the axis of the rotational shaft 312 to the inner circumference of the dust storing portion 221. At this point, the second pressing member 320 shields partly or completely the space defined between the inner circumference of the dust storing portion 221 and the axis of the rotational shaft 312 so that the dusts are pushed and compressed against the first pressing member 310.
  • a first end 321 of the second pressing member 320 is integrally formed on the inner circumference of the dust storing portion 221 and a second end of the second pressing member 320 is integrally formed on the fixing shaft 322 provided on a common axis with the rotational shaft 312 of the first pressing member 310.
  • the second pressing member 320 is integrally formed on the inner circumference of the dust storing portion 221 or only the second end of the second pressing member is integrally formed on the fixing shaft 322. That is, the second pressing member 320 is fixed on at least one of the inner circumference of the dust storing portion 221 and the fixing shaft 322.
  • the first end of the second pressing member 320 is not integrally formed on the inner circumference of the dust storing portion 221, it is preferably that the first end of the second pressing member 320 is positioned near the inner circumference of the dust storing portion 221.
  • the second end of the second pressing member 320 is not integrally connected to the fixing shaft 322, it is preferable that the second end of the second pressing member 320 is positioned near the fixing shaft 322.
  • the reason for positioning the second pressing member 320 is to prevent the dusts rushing in by the first pressing member 310 from leaking through a gap formed in a side direction of the second pressing member 320.
  • the first and second pressing members 310 and 320 are formed of rectangular plates.
  • the rotational shaft 312 of the first pressing member 310 may be provided on a common axis with the axis defining the center of the dust storing portion 221.
  • the fixing shaft 322 protrudes inward from an end of the dust storing portion 221.
  • the fixing shaft 322 is provided with a hollow portion extending in the axial direction.
  • the rotational shaft 312 is assembled in the hollow portion. That is, a portion of the rotational shaft 312 is inserted downward into the hollow portion of the fixing shaft 322.
  • the vacuum cleaner of this embodiment further includes a driving unit 400 connected to a rotational shaft 312 of the first pressing member 310 and rotating the first pressing member 310.
  • the driving unit 400 includes a compression motor 430 generating driving power, and power transmission units 410 and 420 rotating the first pressing member 310 by transmitting the driving power of the compression motor 430 to the first pressing member 310.
  • a micro switch 440 that is turned on/off in response to rotation of the driving gear 420 is provided under the dust collection unit mounting portion 130.
  • the power transmission units 410 and 420 includes a driven gear 410 coupled to the rotational shaft 312 of the first pressing member 310 and a driving gear 420 transmitting power to the driven gear 410.
  • the driving gear 420 is coupled to the rotational shaft 870 of the compression motor 430 to rotate by the compression motor 430.
  • the compression motor 430 rotates, the driving gear 420 coupled to the compression motor 430 rotates.
  • the rotational force of the compression motor 430 is transmitted to the driven gear 410 and thus to the first plate 310, thereby rotating the first pressing member 310.
  • a plurality of gear teeth 422 are formed along an outer circumference of the driving gear 420 at predetermined intervals.
  • portions where the gear teeth 422 are formed will be referred as “top lands” and portions where the gear teeth 422 are not formed will be referred as “bottom-lands.”
  • a terminal extending from a side of the micro switch 440 is positioned corresponding to a lower portion of each of the top-lands of the driving gear 420.
  • the terminal extending from the micro switch 440 periodically detects the top-lands and bottom-lands as the driving gear 420 rotates.
  • the micro switch 440 When the terminal is positioned at the top-land, the micro switch 440 is turned on. When the terminal is positioned at the bottom-land, the micro switch 440 is turned off.
  • the on-off signal of the micro switch is applied to a counter 880 so that a predetermined pulse signal is output. That is, the counter 880 outputs a high level pulse signal when the micro switch 440 is turned on and outputs a low level pulse signal when the micro switch 440 is turned off.
  • the degree of the rotation of the driving gear 420 can be measured.
  • the compression motor 430 is provided at a lower portion of the dust collection unit mounting portion 130 and the driving gear 420 is coupled to the rotational shaft of the compression motor 430 and provided on a bottom of the dust collection unit mounting portion 130.
  • a portion of the outer circumference of the driving gear 420 is exposed at the bottom of the dust collection unit mounting portion 130.
  • a motor receiving portion (not shown) in which the compression motor 430 is installed is provided under the bottom of the dust collection unit mounting portion 130.
  • the dust collection unit mounting portion 130 is provided at an approximately-center of the bottom with an opening 131 through which a portion of the outer circumference of the driving gear 420 is exposed.
  • the rotational shaft 312 of the first pressing member 310 is inserted downward into the hollow portion of the fixing shaft 322 and the driven gear 410 is inserted upward into the hollow portion of the fixing shaft 322, thereby being coupled to the rotational shaft 312.
  • the rotational shaft 312 is provided with a stepped portion 312c supported on the upper end of the fixing shaft 322.
  • the rotational shaft 312 is divided into upper and lower shafts 312a and 312b with reference to the stepped portion 312c.
  • the upper shaft 312a is coupled to the first pressing member 310 and the lower shaft 312b is coupled to the driven gear 410.
  • the lower shaft 312b is provided with a groove 312d in which a gear shaft of the driven gear 410 is inserted.
  • the groove 312d may be formed in a variety of shapes such as circle, square and the like.
  • the gear shaft of the driven gear 410 is formed in a shape corresponding to the groove 312d.
  • the driven gear 410 As the driven gear 410 is exposed to an external side of the dust collection container 220, the driven gear 410 is engaged with the driving gear 420 when the dust collection unit mounting portion 130 is mounted on the dust collection unit 200.
  • the compression motor 430 may be a reversible motor.
  • the compression motor 430 may be a synchronous motor (since the synchronous motor is well known in the art, the detailed description thereof will be omitted herein.
  • the feature that the reversible motor 430 is the synchronous motor is one of the sprit of the present invention).
  • the direction conversion point of time of the compression motor 430 is set by determining a point of time when the driving gear 420 cannot rotate at the predetermined period by the first pressing member 310 that cannot rotate by the dusts.
  • the compression motor 420 stops temporarily with reference to a point of time where the micro switch 440 detects a point of time where the driving gear 420 cannot rotate no longer due to the dusts and then the compression motor 430 rotates in a reverse direction.
  • the first pressing member 31 keeps pressing the dusts for a predetermined time.
  • the power rotating the first pressing member 310 i.e., electric power applied to the compression motor 430 is cut off for a predetermined time so that the first pressing member 310 keeps the pressing state of the dusts.
  • the electric power is applied again to the compression motor 430 so that the first pressing member 31 moves.
  • indications 510 and 520 for allowing the user to empty the dust collection container 220 is displayed in order to prevent the deterioration of the dust collection performance and the overload of the motor.
  • the indicators 510 and 520 are provided on the main body 100 or the handle 40.
  • the indication for letting the user to know the empty timing is displayed on the indicator.
  • indicators 510 and 520 are provided on the main body 100 or the handle 40.
  • the rotational range of the first pressing member 310 is a predetermined level or less.
  • the indication for allowing the user to empty the dust collection container 220 is transmitted to the user through the indicators 510 and 520.
  • the indicator may be a light emitting diode (LED) 510 for visually letting the user know that it is time to empty the dust collection container.
  • the indicator may be a speaker 520 for aurally letting the user know when it is time to empty the dust collection container.
  • the LED 510 and the speaker 520 may be simultaneously applied so that the indication for allowing the user to empty the dust collection container 220 can be more effectively transmitted to the user.
  • the LED 510 may be provided on the handle 40 while the speaker 520 may be provided any one of the main body 100 and the handle 40.
  • Fig. 6 is a perspective view of the dust separating unit and dust collection container of the dust collection unit and Fig. 7 is a bottom perspective view of Fig. 6 .
  • the dust separation unit 210 is coupled to an upper portion of the dust collection container 220 and thus the dusts are separated in the dust separation unit 210 are directed downward and stored in the dust collection container 220.
  • the dust separation unit 210 is provided at an outer circumference with an air inlet 211a formed on a normal direction of the dust separation portion 210.
  • a cover 221d is detachably provided on a top of the dust separation unit 210.
  • the cover 211d is provided at a center with an air outlet 211b through which the air whose dusts are separated by the cyclone unit 211 in the separation unit 210.
  • a hollow air exhaust member 211c is coupled to the air outlet 211b and the hollow air exhaust member 211c is provided at a circumference with a plurality of through holes for exhausting the air directed from the cyclone unit 211.
  • a partition plate 230 is formed at a lower portion of the dust separation unit 210.
  • the partition plate 230 functions to divide the dust separation unit 210 and the dust collection unit 220.
  • the partition plate 230 prevents the dusts from flying into the dust collection container 220 in a state where the dust separation unit 210 is coupled to the dust collection container 220.
  • the partition plate 230 is provided with a dust discharge hole 231 for discharging the dusts from the cyclone unit 211 to the dust collection container 220.
  • the dust discharge hole 231 may be formed at an opposite side of the second pressing member 320.
  • the reason for forming the dust discharge holes 231 at the opposite side of the second pressing member 320 is to maximize an amount of the dusts compressed by the opposite sides of the second pressing member 320 to maximize the dust collection capacity and to prevent the dusts from flying during the collection of the dusts.
  • the dust separation unit 210 and the dust collection container 220 are respectively provided with upper and lower handles 212 and 223.
  • the dust collection unit 200 is provided with a hook device so that the dust collection container 220 can be coupled to the dust separation unit 210 in a state where the dust collection container 220 is mounted on the dust separation unit 210.
  • a hook receiver 241 is provided on the lower end of the dust separation unit 210 and a hook 242 hooked on the receiver 241 is formed on an upper end of the outer circumference of the dust collection container 220.
  • the dust collection unit 200 may further includes at least one sub-cyclone unit provided on the main body and a sub-storing unit 224 provided on the dust collection unit 200.
  • the sub-storing unit 224 functions to secondarily separate the dusts contained in the air exhausted from the main cyclone 211 and the sub-storing unit 224 functions to store the dusts separated by the sub-cyclone unit.
  • the sub-storing unit 224 is provided on an outer circumference of the dust collection unit 200 in a state where an upper end thereof is opened.
  • the sub-storing unit 224 is provided on the outer circumference of the dust collection container 220 and a sub-dust inlet portion 213a communicating with the sub-storing unit 224 is provided on the circumference of the dust separation portion 210.
  • a sub-dust inlet portion 213a selectively communicating with the dust discharge hole 141 of the sub-cyclone unit 140 is formed on an outer wall of the sub-dust inlet portion 213.
  • a bottom of the sub-dust inlet portion 213a is opened to communicate with the sub-storing unit 224.
  • the sub-dust inlet hole 213a is connected to the dust discharge hole 140 of the sub-cyclone unit.
  • the dust collection container 220 is mounted on the main body 100 under the main cyclone unit 211, the sub-dust inlet portion 213 communicates with the sub-storing portion 224.
  • the dusts separated in the sub-cyclone unit are stored in the sub-storing unit 224 through the sub-dust inlet portion 213a.
  • the air directed into the suction nozzle 40 is introduced into the main cyclone unit through the air inlet 211a via the main body suction unit 110.
  • the air introduced into the main cyclone unit is guided in a tangential direction of the inner wall of the main cyclone unit 211 to create spiral current. Therefore, the dusts contained in the air are separated from the air by a centrifugal difference between them.
  • the dusts spirally moving downward along the inner wall of the main cyclone unit 211 are stored in the main storing unit 221 after passing through the dust discharge hole 231 of the partition plate 230.
  • the air whose dusts are primarily separated by the main cyclone unit 211 is exhausted through the air outlet 211b via the air exhaust member 211c and then directed into the sub-cyclone unit.
  • the dusts separated in the sub-cyclone unit are stored in the sub-storing unit 224 and the dusts separated in the sub-cyclone unit are discharged from the sub-cyclone unit. Then, the dusts are introduced into the main body 100 and discharged from the main body through the main body discharge unit 120.
  • the main storing unit 221 most of the dusts introduced into the vacuum cleaner are stored in the main storing unit 221 during cleaning.
  • the dusts stored in the main storing unit 221 are compressed by the first and second pressing members 310 and 320 to a minimum volume. Therefore, a large amount of dusts can be stored in the main storing unit 221.
  • the indicators 510 and 520 operate so that the user knows the fact that the dust collection container 220 must be empted.
  • the user separates the dust collection unit 200 from the main body 100 and empties the same.
  • Figs. 8 and 9 are top views of the dust collection container, illustrating a compression process of the dusts in the dust collection unit and Fig. 10 is a top view illustrating an operation state of the first pressing member during a dust discharge indication is performed.
  • Fig. 8 illustrates a dust compressing state of the first pressing member 310 rotating counterclockwise.
  • Fig. 8 illustrates a dust compressing state of the first pressing member 310 rotating clockwise.
  • Fig. 10 shows that a large amount of dusts are filled in the dust collection container 220 at left and right spaces with reference to the second pressing member 320 by repeating the operations of Figs. 8 and 9 .
  • the following will describe a method for controlling the indication of the dust discharge timing and the compression of the dusts collected in the dust collection container 220.
  • Fig. 11 a block diagram illustrating a control unit of the vacuum cleaner according to an embodiment of the present invention
  • Fig. 12 is a flowchart illustrating the dust compression process in the dust collection unit and the dust discharge request indication
  • Fig. 13 is a waveform of a pulse signal varying according to an amount of the dusts collected in the dust collection unit.
  • the vacuum cleaner of this embodiment includes a control unit 810 formed of a microcomputer, an operation signal input unit 820 for selecting a suction power of the dusts (e.g., high, middle, low power modes), a dust discharge signal display unit 830 formed of a light emitting device, a suction motor driver 840 for operating the suction motor 850 that is a driving motor for sucking the dusts into the dust collection unit according to the operation mode, a compression motor driver 860 for operating the compression motor 430 used for compressing the dusts collected in the dust collection unit, and a counter unit 880 for measuring a degree of the rotation clockwise and counterclockwise (e.g., reciprocal rotation time) of the compression motor 430.
  • a control unit 810 formed of a microcomputer
  • an operation signal input unit 820 for selecting a suction power of the dusts (e.g., high, middle, low power modes)
  • a dust discharge signal display unit 830 formed of a light emitting device
  • a suction motor driver 840 for
  • the control unit 810 controls the suction motor driver 840 so that the suction motor 850 can be operated with the suction power corresponding to the selected power mode. That is, the suction motor driver 840 operates the suction motor 850 with the suction power according to a signal transmitted from the control unit 810.
  • control unit 810 operates the compression motor 430 simultaneously with or right after the operation of the suction motor driver 840.
  • the suction motor 850 When the suction motor 850 operates, the dusts starts being sucked into the dust collection unit through the suction nozzle 20.
  • the dusts introduced into the dust collection unit are compressed by the first compressing member 310 rotating clockwise and counterclockwise by the compression motor 430.
  • the counter unit 880 measures the reciprocal time (period) of the compression motor 430 and transmits the corresponding signal to the control unit 810.
  • the reciprocal rotation time of the compression motor is reduced.
  • the control unit 810 displays an empty request signal through the indicator 830.
  • Fig. 12 is a flowchart illustrating a method of controlling the vacuum cleaner. That is, Fig. 12 shows the operation concept of the block diagram of Fig. 11 in more detail.
  • the user operates the vacuum cleaner by selecting one of the high, middle and low modes of the operation signal input unit 820.
  • the control unit 810 controls the suction motor driver 840 so that the suction motor 850 can be operated with the suction power corresponding to the selected power mode (S110).
  • the suction motor 850 When the suction motor 850 operates, the dusts starts being sucked into the dust collection unit through the suction nozzle 20. The sucked dusts are collected in the dust collection unit, i.e., in the dust collection container 220.
  • the dusts collected in the dust collection container 220 are compressed by the pressing members 310 and 320.
  • control unit 810 drives the compression motor 430 to compress the dusts sucked in the dust collection container (S120).
  • the compression motor 430 is driven after the suction motor 850 is driven, the suction and compression motors 850 and 870 may be simultaneously operated.
  • step S120 when the compression motor 430 is driven, the driving gear 420 coupled to the rotational shaft of the compression motor 430 rotates.
  • the driving gear 410 rotates
  • the driven gear 410 starts rotating.
  • the rotational shaft 312 coupled to the driven gear 410 and the first pressing member 310 rotate toward the second pressing member 320 to compress the dusts.
  • the counter 880 receives the on-off signal of the micro switch to output a pulse signal corresponding to the received on-off signal to the control unit 810.
  • the reciprocal rotation time of the driven gear 410 is reduced and thus the reciprocal rotation time of the driving gear 420 engaged with the driven gear 410 is also reduced.
  • the reduction of the reciprocal rotation time of the driving gear 420 means that the number of on-off operations of the micro switch M is reduced. That is, the number of the pulse signals output from the counter unit 880 is reduced.
  • the driven and driving gears 410 and 420 rotate with a predetermined period and thus the micro switch 440 is turned on and off with a predetermined period according to the rotation of the driving gear 420.
  • the control unit determines that the dusts are fully compressed by the rotation of the first pressing member 310. This determining process is done with reference to whether the pulse signal is regularly generated.
  • control unit determines if the regular pulses are generated from the counter unit 880.
  • control unit 810 stops the operation of the compression motor 430.
  • the control unit 810 detects this and stops the compression motor 430 using the compression motor driver 860. Therefore, the rotation of the first pressing member 310 is stopped.
  • the control unit 870 maintains the stopped state of the compression motor 430 for a predetermined time (e.g., 3 seconds).
  • This predetermined time is a stand by time for driving the compression motor 430 in a reverse direction and is a time for keeping a dust compression state by the stopped first pressing member 310.
  • control unit 810 determines if the number N of the pulses from the former compression motor stop point (time T1) to the current compression motor stop point (time T2) is less than a reference number. For example, when an amount of the dusts is greater than a reference amount, the reciprocal time of the first pressing member 310 is reduced in response to the reduction of the number of the pulses output from the counter unit 880 during the period.
  • the determination if the amount of the dusts compressed in the dust collection container 220 is higher than the reference amount is done by measuring the reciprocal time of the first pressing member (the number of the pulses generated from the counter unit 880).
  • step S170 it is determined that the number N of the pulses from the former compression motor stop point (time T1) to the current compression motor stop point (time T2) is greater than the reference number, it means that there is still a space for further compressing the dusts in the dust collection container. Therefore, the process is returned to the step S120.
  • the compression motor 430 is controlled by the control unit 810 such that it rotates in a direction opposite to that of step S150.
  • the control unit 810 determines if the number of the results where the number of the pulses determined in the step S170 is less than the predetermined number reaches a reference number of times (e.g., 3 times). By doing this, it is possible to more accurately determine if the amount of the dusts in the dust collection container 220 is higher than the reference amount. Furthermore, an error that may occur as the first pressing member 310 cannot normally rotate in both directions due to the affection of the dusts can be prevented.
  • step S180 when the number of the results is less than the reference number of times, the process is returned to the step S130.
  • the control unit 810 stops the operation of the suction motor 850.
  • control unit 810 transmits an empty request signal to a dust discharge request signal display unit 830 so that the user can concern this.
  • the dust discharge request signal may be represented by sound using a buzzer circuit.
  • Fig. 13 is an example of a waveform of the pulse signal that varies in accordance with the amount of the dusts collected in the dust collection unit.
  • Fig. 13a shows a case where few dusts are in the dust collection container 220.
  • Fig. 13b shows a case where the dusts are being filled in the dust collection container 220, and
  • Fig. 13c shows a case where the amount of the dusts reaches the reference amount.
  • the pulse waveform is a signal that is output from the counter unit 880 and input to the control unit 810.
  • the pulse signal is output from the counter unit 880 receiving a signal of the micro switch 440 that is turned on and off according to the rotation of the driving gear 420.
  • the control unit starts normally operating from a point A where the compression motor 430 rotates counterclockwise and initially stops (here, a section a-b is 3 seconds). That is, after reaching the point A, the control unit determines that the pulse signals input from the counter unit 880 are the normal pulse signals.
  • the first pressing member 310 can rotate to the maximum clockwise and counterclockwise and thus 10 pulses will be output as shown in Fig. 13a .
  • the reciprocal rotation time of the first pressing member will be gradually reduced (i.e., the rotational angle of the first pressing member 310 will be reduced).
  • the control unit when the number of the pulse signals is three and the generation of these pulse signals is repeated by a reference number of times (3 times in this embodiment), the control unit generates an empty request signal.
  • the dust compression process in the dust collection unit and the empty request timing display process are controlled as described above.
  • the following will describe a method of controlling a driving force of the suction motor in accordance with an amount of the dusts introduced into the vacuum cleaner.
  • Fig. 13 is a waveform of a pulse signal which varies in accordance with an amount of the dusts collected in the dust collection unit
  • Fig. 14 is a flowchart illustrating a control method of a suction motor according to an embodiment of the present invention
  • Fig. 15 is a view illustrating a relationship between an amount of dusts and a suction force of a suction motor according to the prior art
  • Fig. 16 is a view illustrating a relationship between an amount of dusts and a suction force of a suction motor according to an embodiment of the present invention.
  • a predetermined driving force (a first driving force) is generated by the suction motor 850 (S320).
  • the first driving force is controlled by the control unit 810 during the initial operation of the vacuum cleaner.
  • the first driving force may vary depending on a maximum driving force of the suction motor 850.
  • the first driving force may be 90% of the maximum driving force.
  • control unit measures an amount of dusts accumulated in the dust collection unit using the above described dust amount measuring manner (S330). That is, the control unit 810 measures the amount of the dusts accumulated in the dust collection unit with reference to the number of the pulse signals input from the counter unit 880.
  • the control unit 810 allows the suction motor to keep operating with the first driving force and keeps measuring the amount of the dusts stored in the dust collection unit.
  • the control unit 810 increases the driving force of the suction motor 850 at a predetermined rate in response to the increase of the amount of the dusts.
  • the driving force that is increasing is referred as "second driving force.”
  • the second driving force may increase in proportion to the increase of the amount of the dusts.
  • the second driving force may increase step by step in accordance with the amount of the dusts.
  • the amount of the dusts as the driving force of the suction motor is increasing is less than that of the dusts as the suction motor stops driving in Fig. 12 .
  • the determination if the amount of the dusts is greater than the reference amount can be done with reference to the number of the pulses generated from the counter unit 880.
  • the driving force of the suction motor is constantly maintained regardless of the amount of the dusts stored in the dust collection unit. Therefore, when the amount of the dusts accumulated in the dust collection unit is greater than the reference amount, the actual suction force for sucking dusts from an external side is reduced.
  • the suction force can be uniformly maintained regardless of the amount of the dusts collected in the dust collection unit.
  • the suction force of the vacuum cleaner can be uniformly maintained by gradually increasing the driving force of the suction motor 850 from a point of time where the amount of the dusts sucked into the air cleaner becomes greater than the reference amount.
  • the suction motor 850 stops operating and the empty request signal is transmitted to the external side.
  • the present invention is applied to the canister type vacuum cleaner by way of example, the present invention can be also applied to an upright type vacuum cleaner as well as a robot vacuum cleaner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Electric Vacuum Cleaner (AREA)

Claims (11)

  1. Procédé de commande d'un aspirateur ayant une unité (200) de collecte de poussière, dans laquelle des poussières séparées de l'air aspiré par un moteur (850) d'aspiration sont emmagasinées, procédé dans lequel :
    on fait fonctionner le moteur (850) d'aspiration à une première force d'entraînement ;
    on détermine une quantité des poussières emmagasinées dans l'unité (200) de collecte de poussière et
    on fait fonctionner le moteur (850) d'aspiration à une deuxième force d'entraînement plus grande que la première force d'entraînement au fur et à mesure qu'augmente la quantité des poussières,
    caractérisé en ce que le procédé comprend, en outre, un stade de pressage des poussières emmagasinées dans l'unité (200) de collecte des poussières, au moins lorsque le moteur d'aspiration fonctionne en faisant tourner au moins un premier élément (310) de pressage au moyen d'un moteur (430) de pressage.
  2. Procédé suivant la revendication 1, dans lequel la deuxième force d'entraînement augmente au fur et à mesure qu'augmente la quantité de la poussière.
  3. Procédé suivant la revendication 1, dans lequel la deuxième force d'entraînement augmente pas à pas en fonction de la quantité des poussières.
  4. Procédé suivant la revendication 1, dans lequel, lorsque la quantité des poussières est plus grande qu'une quantité de référence, le moteur d'aspiration cesse de fonctionner.
  5. Procédé suivant la revendication 1, dans lequel, lorsque la quantité des poussières est plus grande qu'une quantité de référence, un signal de demande de déchargement de la poussière est affiché.
  6. Procédé suivant la revendication 1, dans lequel on détecte continuellement un temps de mouvement de l'élément de pressage et on effectue la détermination de la quantité des poussières en se reportant au temps de mouvement.
  7. Procédé suivant la revendication 1, dans lequel on transforme le temps de mouvement en un signal à impulsion par une unité (880) de compteur.
  8. Procédé suivant la revendication 6, dans lequel l'élément (310) de pressage peut tourner dans les deux sens et on détermine le sens de rotation de l'élément (310) de pressage en fonction du temps de mouvement.
  9. Procédé suivant la revendication 1, dans lequel la première force d'entraînement est fixée par un utilisateur.
  10. Procédé suivant la revendication 1, dans lequel on effectue la détermination de la quantité des poussières emmagasinées dans l'unité (200) de collecte par l'intermédiaire d'une unité (880) de compteur mesurant un nombre de signal à impulsions, les signaux à impulsions étant créés en réaction à une détection de dents (422) d'engrenage formées le long d'une circonférence extérieure d'un engrenage (420) d'entraînement tournant par un micro interrupteur, l'engrenage (420) d'entraînement transmettant la rotation du moteur (430) de pressage à l'élément (310) de pressage tournant et le nombre compté de signaux à impulsions permettant de mesurer la plage de rotation de l'élément (310) de pressage, dans lequel, lorsque la plage de rotation de l'élément (310) de pressage est inférieure ou égale à une valeur déterminée à l'avance, il est déterminé qu'il y a une quantité déterminée à l'avance ou plus de poussières collectées dans le récipient (220) de collecte de poussière.
  11. Procédé suivant la revendication 10, dans lequel on affiche une indication permettant à l'utilisateur de vider le récipient (220) de collecte de poussière, lorsque la plage de rotation de l'élément (310) de pressage est à la valeur déterminée à l'avance ou lui est inférieure.
EP07101390.8A 2006-09-06 2007-01-30 Procédé de commande d'un aspirateur Active EP1897479B1 (fr)

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RU2007103560A (ru) 2008-08-10
AU2007200408B2 (en) 2009-06-18
CN101138478A (zh) 2008-03-12
CN101138478B (zh) 2010-09-29
AU2007200408A1 (en) 2008-03-20
EP1897479A2 (fr) 2008-03-12
EP1897479A3 (fr) 2012-04-18
KR20080022468A (ko) 2008-03-11
JP2008062017A (ja) 2008-03-21
JP4705052B2 (ja) 2011-06-22
KR100876694B1 (ko) 2008-12-31
RU2346643C2 (ru) 2009-02-20

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