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
  • A47L9/02—Nozzles
  • A47L9/04—Nozzles with driven brushes or agitators
  • A47L9/0405—Driving means for the brushes or agitators
  • A47L9/0411—Driving means for the brushes or agitators driven by electric motor
• • 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
  • A47L9/2831—Motor parameters, e.g. motor load or speed
• • 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
  • A47L9/2836—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
  • A47L9/2847—Surface treating elements

Definitions

• the invention initially relates to a method for detecting the forward and backward movement of a, an electric motor driven brush having attachment of a vacuum cleaner, in particular a household vacuum cleaner.
• Brush is measured flowing motor current and is compared to detect the forward or backward movement with a reference motor current.
• a method of the type in question is given, which is substantially simplified. There is no need for a sensor or the like, which another, possibly interference-prone component would represent. Rather, the power consumption of the already continuously driven via the electric motor brush to determine the direction of movement is used to detect the movement.
• the brush of the vacuum cleaner or of the attachment device connected to the vacuum cleaner is driven about a rotational axis running transversely to the direction of movement.
• the drive direction of the brush is usually selected in the feed direction of the vacuum cleaner, so that the mechanically dissolved dirt is dropped with respect to a conventional feed movement of the device towards the rear in the direction of there arranged under pressure-loaded suction mouth. This results in the fact that the current consumption of the brush in the
• Forward movement of the device is lower than during a return movement of the device, in which the rotational movement of the brush acts counter to the direction of movement of the device.
• the rotating brush acts as a resistor in connection with the return movement of the device, which is reflected in an increased current consumption.
• the determined current level is compared with a reference motor current. If the determined motor current is lower than the reference motor current, then the above-described rotational movement of the electric motor-driven brush is a forward movement of the device. If the determined motor current is greater than the reference motor current, it is a return movement. Also, the standstill of the vacuum cleaner or connected to this, the electric motor driven brush having attachment can be detected by the method according to the invention. In this state, the determined motor current is approximately equal to the reference motor current.
• the reference motor current is a motor current averaged from a continuous measurement. Accordingly, the reference Motor current adapted to the prevailing conditions, such as. For example, the effect on the resistance at the brush carpet carpet height. Alternatively, a defined reference motor current value can also be stored. In a preferred embodiment, it is provided that the determined motor current is averaged with the aid of a low-pass filter, wherein the time constant of the low-pass compared to a typical forward and reverse time of the intent is large, so for example. 1 to 5 sec., Preferably about 3 sec. The motor current is further preferably determined by means of a shunt resistor. At this shunt resistor drops a voltage that is proportional to the motor current.
• the invention further relates to a vacuum cleaner, in particular household vacuum cleaner, with an electric motor driven brush.
• the object of the invention is to further improve a vacuum cleaner of the type in question.
• a measuring device which measures the motor current of the electric motor driving the brush, a comparison being made. is rather provided, which compares the measured motor current with a reference motor current.
• a vacuum cleaner is provided which has means for easy detection of the forward and backward movement of the device. The measuring device detects the already occurring motor current during operation of the device and compares this with a reference motor current. In a conventional rotational movement of the driven brush in the feed direction of the device compared to the reference motor current detected lower motor current corresponds to the forward movement of the vacuum cleaner or the attachment, since the rotating brush less than resistance, but rather even motion-supporting acts in this direction.
• the detected motor current is greater than the reference motor current
• the return movement of the device can be summed up from this.
• the case here against the device movement direction rotating brush acts accordingly as a resistor, which leads to an increased power consumption.
• even a standstill of the device or the vacuum cleaner can be detected by the proposed measuring device. This is the case when the detected motor current is approximately equal to the reference motor current.
• a shunt resistor is preferably provided, at which a voltage drops which is proportional to the motor current.
• the reference motor current can be stored as a comparison value in the measuring device.
• an averaging circuit is provided for providing the reference motor current, which has a low-pass filter. Accordingly, the reference motor current to be compared with the detected motor current is adapted to the prevailing conditions during the suction processing, such as carpet pile height, etc.
• the time constant of the low-pass filter is set large compared with a typical forward and return time of the vacuum cleaner or of the attachment, in particular between 1 to 5 seconds, preferably 3 seconds.
• Figure 1 is a perspective view of a stalk-guided household vacuum cleaner with a, an unspecified electric motor-driven brush having attachment.
• Fig. 2 is a partially sectioned schematic side view of the attachment during the suction operation, when advancing the same;
• Fig. 3 is a representation corresponding to Figure 2, but in return displacement of the attachment.
• Fig. 6 the measuring device in a second embodiment, constructed digitally.
• a vacuum cleaner 1 is shown in the form of a stalk-guided household vacuum cleaner to which a header 2 is connected both electrically and fluidly.
• the latter has a roller-shaped brush 3, the axis of rotation x is aligned parallel to the front edge edge of the attachment 2 and thus transversely to a conventional travel direction r, which corresponds to a forward movement of the device 2.
• the roller-shaped brush 3 has radially protruding bristle tufts 4, which project beyond the bottom of the device 5 on the underside, for mechanical brushing of the carpet to be cleaned 6.
• the brush 3 is driven by an electric motor.
• the relevant electric motor 7 is shown only schematically in Figures 2 and 3.
• the power transmission takes place via a belt drive 8, not shown.
• the electric motor 7 is offset via the belt drive 8, the brush 3 in a rotational movement about the axis x with a rotational direction d, which is chosen so that during conventional advancement of the attachment 2 in the direction of travel r a supporting thrust effect is reached.
• a direction of rotation of the brush 3 is selected so that a component of movement in the direction of travel r is achieved by friction with the carpet 6.
• a direction of rotation of the brush 3 is selected counterclockwise.
• a measuring device such as, for example, based on a first embodiment in Fig. 5 is provided, which measures the motor current of the brush 3 driving electric motor 7 and compares this determined motor torstromwert with a reference motor current value.
• the reference motor current I RM is a motor current determined from a continuous measurement, an averaging circuit having a low-pass filter 11 being provided to provide the reference motor current I RM.
• the time constant of the low-pass filter 11 is dimensioned large compared to a typical forward and backward time of the attachment 2, so for example. With three seconds. Within this time, the header 2 has been moved at least once in the forward direction r and once in the return direction r 1 usually.
• the value I RM averaged out of this is currently adapted to the circumstances, for example, the frictional resistance built up between the bristles 4 of the brush 3 and the carpet 6, which in turn is dependent on the carpet pile height, among other factors.
• the relevant motor current I M is determined by means of a shunt resistor 12, at which a voltage which is proportional to the motor current drops.
• the instantaneous motor current I Mwird is compared by means of a comparator 13 with the averaged motor current I RM. If the instantaneous motor current IM is lower than the averaged motor current IR, then this is to be inferred from a movement of the attachment 2 in the usual forward direction r. If, however, the instantaneous motor current IM is greater than the average motor current I RM, this can be concluded from a displacement of the attachment 2 in the direction of return r 1 . Even the standstill of the attachment 2 can be detected by means of this measuring device 10, since in this case the instantaneous motor current IM approximately corresponds to the averaged motor current I RM.
• FIG. 6 shows an alternative circuit arrangement. In this case, the signal processing takes place digitally by means of a microprocessor 14 after the current signal has been digitized with the aid of an analog-to-digital converter 15.
• the obtained movement direction signal can be used for controlling the brush motor 7 and / or the fan motor in the vacuum cleaner and / or for controlling Mauluf tö réelleen in the suction mouth 9 of the attachment 2 limiting area.
• the motion is detected by electronic / electronic means without the use of mechanical or optical / acoustic sensor elements which are particularly prone to wear or the like.

Landscapes

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

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=36061454

Family Applications (1)

Country Status (8)

Families Citing this family (11)

Citations (5)

Family Cites Families (2)

• 2004
  • 2004-12-24 DE DE102004062536A patent/DE102004062536A1/de not_active Withdrawn
• 2005
  • 2005-12-16 JP JP2007547468A patent/JP2008525073A/ja active Pending
  • 2005-12-16 CN CN2005800439592A patent/CN101083932B/zh not_active Expired - Fee Related
  • 2005-12-16 EP EP05817402A patent/EP1827194B1/de not_active Not-in-force
  • 2005-12-16 WO PCT/EP2005/056861 patent/WO2006069923A1/de active Application Filing
  • 2005-12-16 DE DE502005010428T patent/DE502005010428D1/de active Active
  • 2005-12-16 RU RU2007128343/12A patent/RU2007128343A/ru not_active Application Discontinuation
  • 2005-12-16 AT AT05817402T patent/ATE484991T1/de not_active IP Right Cessation
  • 2005-12-23 TW TW094146109A patent/TW200631541A/zh unknown

Patent Citations (5)

Non-Patent Citations (3)

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