WO2006069923A1 - Method for detecting the back-and-forth movement of a vacuum cleaner, and corresponding vacuum cleaner - Google Patents

Method for detecting the back-and-forth movement of a vacuum cleaner, and corresponding vacuum cleaner Download PDF

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Publication number
WO2006069923A1
WO2006069923A1 PCT/EP2005/056861 EP2005056861W WO2006069923A1 WO 2006069923 A1 WO2006069923 A1 WO 2006069923A1 EP 2005056861 W EP2005056861 W EP 2005056861W WO 2006069923 A1 WO2006069923 A1 WO 2006069923A1
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WO
WIPO (PCT)
Prior art keywords
vacuum cleaner
motor current
brush
attachment
motor
Prior art date
Application number
PCT/EP2005/056861
Other languages
German (de)
French (fr)
Inventor
Martin Fieseler
Carsten Zautke
Original Assignee
Vorwerk & Co. Interholding Gmbh
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 Vorwerk & Co. Interholding Gmbh filed Critical Vorwerk & Co. Interholding Gmbh
Priority to JP2007547468A priority Critical patent/JP2008525073A/en
Priority to EP05817402A priority patent/EP1827194B1/en
Priority to DE502005010428T priority patent/DE502005010428D1/en
Priority to AT05817402T priority patent/ATE484991T1/en
Priority to CN2005800439592A priority patent/CN101083932B/en
Publication of WO2006069923A1 publication Critical patent/WO2006069923A1/en

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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
    • A47L9/02—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.

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

Abstract

The invention relates to a method for detecting the back-and-forth movement of an attachment (2) of a vacuum cleaner (1), especially a household vacuum cleaner, comprising an electromotive brush (3), and to a vacuum cleaner, especially a household vacuum cleaner. The aim of the invention is to simplify one such method and to improve one such vacuum cleaner. To this end, the motor power (I M) for driving the brush (3) is measured and compared with a reference motor power (I R-M) in order to determine the back-and-forth movement, and the vacuum cleaner is provided with a measuring device (10) which measures the motor power (IM) of the electric motor (7) driving the brush (3). A comparator (13) is used to compare the measured motor power (IM) with a reference motor power (IR-M).

Description

Verfahren zum Erfassen der Vor- und Rückbewegung eines Staubsaugers sowie Staubsauger hierzuMethod for detecting the forward and backward movement of a vacuum cleaner and vacuum cleaner for this purpose
Die Erfindung betrifft zunächst ein Verfahren zum Erfassen der Vor- und Rückbewegung eines, eine elektromotorisch angetriebene Bürste aufweisenden Vorsatzes eines Staubsaugers, insbesondere eines Haushaltsstaubsaugers.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.
Es besteht das Bedürfnis, die Bewegungsrichtung des Staubsaugers, insbesondere eines an diesen angeschlossenen Vorsatzgerätes mit einer elektromotorisch angetriebenen Bürste zu erfassen, um aus der ermittelten Schub- oder Zugrichtung Maßnahmen zur Beeinflussung des Staubsaugers bzw. des die Bürste aufweisenden Vorsatzgerätes abzuleiten. Diesbezüglich ist es bekannt, den Staubsauger bzw. das die elektromotorisch angetriebene Bürste aufweisende Vorsatzgerät mit einem Schlepphebel zu versehen, welcher gerätebodenseitig angeordnet ist. Durch Reibung mit dem zu saugenden Boden, insbesondere Teppichboden, wird der Schlepphebel entsprechend ausgelenkt, welche Schwenkstellung von einem Kippschalter oder dergleichen elektrisch erfasst wird.There is a need to detect the direction of movement of the vacuum cleaner, in particular a connected thereto attachment with an electric motor driven brush to derive measures from the determined pushing or pulling direction for influencing the vacuum cleaner or the brush having the attachment. In this regard, it is known to provide the vacuum cleaner or the electric motor driven brush having attachment with a cam follower, which is arranged on the device bottom side. By friction with the soil to be sucked, in particular carpeting, the drag lever is deflected accordingly, which pivot position is detected electrically by a toggle switch or the like.
Im Hinblick auf den zuvor beschriebenen Stand der Technik wird eine technische Problematik der Erfindung darin gesehen, ein Verfahren der in Rede stehenden Art zu vereinfachen.In view of the above-described prior art, a technical problem of the invention is seen in simplifying a method of the type in question.
Diese Problematik ist zunächst und im Wesentlichen durch den Gegenstand des Anspruches 1 gelöst, wobei darauf abgestellt ist, dass der zum Antrieb derThis problem is solved first and foremost by the subject matter of claim 1, wherein it is pointed out that the drive for the
Bürste fließende Motorstrom gemessen wird und zur Erkennung der Vor- bzw. Rückbewegung mit einem Referenzmotorstrom verglichen wird. Zufolge dieser erfindungsgemäßen Ausgestaltung ist ein Verfahren der in Rede stehenden Art angegeben, welches im Wesentlichen vereinfacht ist. Es bedarf keines Sensors oder dergleichen, welcher ein weiteres, gegebenenfalls störanfälliges Bauteil darstellen würde. Vielmehr wird zur Erkennung der Bewegung die Stromaufnahme der ohnehin über den Elektromotor stetig angetriebenen Bürste zur Ermittlung der Bewegungsrichtung herangezogen. In üblicher Weise ist die Bürste des Staubsaugers bzw. des an dem Staubsauger angeschlossenen Vorsatzge- rätes um eine quer zur Bewegungsrichtung verlaufende Rotationsachse angetrieben. Die Antriebsrichtung der Bürste ist in der Regel in Vorschubrichtung des Staubsaugers gewählt, so dass der mechanisch gelöste Schmutz mit Bezug auf eine übliche Vorschubbewegung des Gerätes nach hinten in Richtung auf den dort angeordneten, unter druckbelasteten Saugmund abgeworfen wird. Hieraus ergibt sich die Tatsache, dass die Stromaufnahme der Bürste in derBrush is measured flowing motor current and is compared to detect the forward or backward movement with a reference motor current. According to this embodiment of the invention, 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. In the usual way, 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
Vorbewegung des Gerätes geringer ist als bei einer Rückbewegung des Gerätes, bei welcher die Rotationsbewegung der Bürste entgegen der Bewegungsrichtung des Gerätes wirkt. Die rotierende Bürste wirkt hier in Verbindung mit der Rückbewegung des Gerätes als Widerstand, was sich in einer erhöhten Strom- aufnähme widerspiegelt. Die ermittelte Stromhöhe wird mit einem Referenz- Motorstrom verglichen. Ist der ermittelte Motorstrom geringer als der Referenz- Motorstrom, so handelt es sich bei der vorbeschriebenen Rotationsbewegung der elektromotorisch angetriebenen Bürste um eine Vorbewegung des Gerätes. Ist der ermittelte Motorstrom größer als der Referenz-Motorstrom, handelt es sich um eine Rückbewegung. Auch der Stillstand des Staubsaugers bzw. des an diesem angeschlossenen, die elektromotorisch angetriebene Bürste aufweisenden Vorsatzgerätes ist mittels des erfindungsgemäßen Verfahrens erfassbar. In diesem Zustand ist der ermittelte Motorstrom annähernd gleich dem Referenz- Motorstrom.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.
Die Gegenstände der weiteren Ansprüche sind nachstehend in Bezug zu dem Gegenstand des Anspruches 1 erläutert, können aber auch in ihrer unabhängigen Formulierung von Bedeutung sein.The subjects of the further claims are explained below in relation to the subject matter of claim 1, but may also be significant in their independent formulation.
So ist weiter vorgesehen, dass der Referenz-Motorstrom ein aus einer fortlaufenden Messung gemittelter Motorstrom ist. Entsprechend ist der Referenz- Motorstrom angepasst an die vorherrschenden Bedingungen, wie bspw. die auf den Widerstand an der Bürste Einfluss nehmende Teppichflorhöhe. Alternativ kann auch ein festgelegter Referenz-Motorstromwert hinterlegt sein. In einer bevorzugten Weiterbildung ist vorgesehen, dass der ermittelte Motorstrom mit Hilfe eines Tiefpasses gemittelt wird, wobei die Zeitkonstante des Tiefpasses gegenüber einer typischen Vor- und Rücklauf zeit des Vorsatzes groß ist, so bspw. 1 bis 5 Sek., bevorzugt etwa 3 Sek.. Der Motorstrom wird weiter bevorzugt mit Hilfe eines Shunt- Widerstandes ermittelt. An diesem Shunt- Widerstand fällt eine Spannung ab, die proportional zum Motorstrom ist.It is further provided that 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.
Die Erfindung betrifft des Weiteren einen Staubsauger, insbesondere Haushaltsstaubsauger, mit einer elektromotorisch angetriebenen Bürste.The invention further relates to a vacuum cleaner, in particular household vacuum cleaner, with an electric motor driven brush.
Bei Staubsaugern der in Rede stehenden Art besteht das Bedürfnis zwischen einer Vor- und einer Rückbewegung des Staubsaugers bzw. eines an diesem angeschlossenen Vorsatzgerätes mit elektromotorisch angetriebener Bürste zu unterscheiden, um gegebenenfalls aus der ermittelten Bewegungsrichtung heraus Maßnahmen bspw. zur Regelung des Bürstenmotors oder des Gebläsemotors abzuleiten. Diesbezüglich sind mechanische Lösungen bekannt, bei wel- chen bspw. gerätebodenunterseitig ein Schlepphebel angeordnet ist, welcher unter Mitnahme durch den überf ahrenen Teppichboden in die eine oder andere Stellung verschwenkt wird. Die Schwenkstellung wird bspw. über einen Kippschalter elektrisch erfasst.In vacuum cleaners of the type in question, there is a need to differentiate between a forward and a return movement of the vacuum cleaner or a connected thereto attachment with electric motor driven brush, if necessary from the determined direction of movement measures, for example. For controlling the brush motor or the fan motor derive. In this regard, mechanical solutions are known in which, for example, the apparatus bottom side, a drag lever is arranged, which is pivoted under entrainment through the überfarnished carpet in one or the other position. The pivot position is detected electrically, for example, via a toggle switch.
Im Hinblick auf den zuvor beschriebenen Stand der Technik stellt sich der Erfindung die Aufgabe, einen Staubsauger der in Rede stehenden Art weiter zu verbessern.With regard to the prior art described above, the object of the invention is to further improve a vacuum cleaner of the type in question.
Diese Problematik ist zunächst und im Wesentlichen durch den Gegenstand des Anspruches 5 gelöst, wobei auf eine Messeinrichtung abgestellt ist, die den Motorstrom des die Bürste antreibenden Elektromotors misst, wobei ein Verglei- eher vorgesehen ist, der den gemessenen Motorstrom mit einem Referenz- Motorstrom vergleicht. Zufolge dieser Ausgestaltung ist ein Staubsauger angegeben, welcher Mittel aufweist, zur einfachen Erfassung der Vor- und Rückbewegung des Gerätes. Die Messeinrichtung erfasst den ohnehin anfallenden Mo- torstrom während des Betriebs des Gerätes und vergleicht diesen mit einem Referenz-Motorstrom. Bei einer üblichen Rotationsbewegung der angetriebenen Bürste in Vorschubrichtung des Gerätes entspricht ein gegenüber dem Referenz-Motorstrom geringerer erfasster Motorstrom der Vorbewegung des Staubsaugers bzw. des Vorsatzgerätes, da die rotierende Bürste weniger als Wider- stand, sondern vielmehr sogar bewegungsunterstützend in diese Richtung wirkt. Ist hingegen der erfasste Motorstrom größer als der Referenz- Motorstrom, so kann hieraus die Rückbewegung des Gerätes resümiert werden. Die hierbei entgegen der Gerätebewegungsrichtung rotierende Bürste wirkt entsprechend als Widerstand, was zu einer erhöhten Stromaufnahme führt. Darüber hinaus kann mittels der vorgeschlagenen Messeinrichtung sogar ein Stillstand des Gerätes bzw. des Staubsaugers erkannt werden. Dies ist dann der Fall, wenn der erfasste Motorstrom annähernd gleich dem Referenz- Motorstrom ist.This problem is solved first and foremost by the subject matter of claim 5, wherein a measuring device is used 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. According to this embodiment, 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. If, on the other hand, 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. In addition, 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.
Die Gegenstände der weiteren Ansprüche sind nachstehend in Bezug zu dem Gegenstand des Anspruchs 5 erläutert, können aber auch in ihrer unabhängigen Formulierung von Bedeutung sein.The subjects of the further claims are explained below in relation to the subject matter of claim 5, but may also be significant in their independent formulation.
In der Motorstrom-Messeinrichtung ist bevorzugt ein Shunt- Widerstand vor- gesehen, an welchem eine Spannung abfällt, die proportional zum Motorstrom ist. Der Referenz-Motorstrom kann als Vergleichswert in der Messeinrichtung hinterlegt sein. Bevorzugt wird jedoch eine Ausgestaltung, bei welcher zur Bereitstellung des Referenz-Motorstroms eine Mittlungsschaltung vorgesehen ist, die einen Tiefpass aufweist. Entsprechend ist der mit dem erf assten Motorstrom zu vergleichende Referenzmotorstrom angepasst an die während der Saugbearbeitung vorherrschenden Gegebenheiten, wie bspw. Teppichflorhöhe usw. Die Zeitkonstante des Tiefpasses ist gegenüber einer typischen Vor- und Rücklaufzeit des Staubsaugers bzw. des Vorsatzgerätes groß eingestellt, so insbesondere zwischen 1 bis 5 Sek., bevorzugt 3 Sek.In the motor current measuring device, 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. However, an embodiment is preferred in which 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.
Nachstehend ist die Erfindung anhand der beigefügten Zeichnung, welche lediglich zwei Ausführungsbeispiele darstellt, näher erläutert. Es zeigt:The invention with reference to the accompanying drawings, which illustrates only two embodiments, explained in more detail. It shows:
Fig. 1 in perspektivischer Darstellung einen stielgeführten Haushaltsstaubsauger mit einem, eine nicht näher dargestellte elektromoto- risch angetriebene Bürste aufweisenden Vorsatzgerätes;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 in einer partiell geschnittenen Schema-Seitenansicht das Vorsatzgerät während des Saugbetriebs, bei Vorverlagerung desselben;Fig. 2 is a partially sectioned schematic side view of the attachment during the suction operation, when advancing the same;
Fig. 3 eine der Fig. 2 entsprechende Darstellung, jedoch bei Rückverlagerung des Vorsatzgerätes;Fig. 3 is a representation corresponding to Figure 2, but in return displacement of the attachment.
Fig. 4 eine idealisierte Darstellung eines Motorstromaufnahme-4 shows an idealized representation of a motor current consumption
Diagrammes;diagram;
Fig. 5 die in analoger Schaltung aufgebaute Messeinrichtung;5 shows the measuring device constructed in analog circuit;
Fig. 6 die Messeinrichtung in einer zweiten Ausführungsform, digital aufgebaut.Fig. 6, the measuring device in a second embodiment, constructed digitally.
In Fig. 1 ist ein Staubsauger 1 in Form eines stielgeführten Haushaltsstaubsaugers dargestellt, an welchem ein Vorsatzgerät 2 sowohl elektrisch als auch strömungsmäßig angeschlossen ist. Letzteres weist eine walzenförmige Bürste 3 auf, deren Rotationsachse x parallel ausgerichtet ist zur stirnseitigen Randkante des Vorsatzgerätes 2 und somit quer zu einer üblichen Verfahrrichtung r, welcher einer Vorbewegung des Gerätes 2 entspricht. Die walzenförmige Bürste 3 weist radial abstehende Borstenbüschel 4 auf, die unterseitig über den Geräteboden 5 hinausragen, zur mechanischen Bürstbearbeitung des zu reinigenden Teppichbodens 6.In Fig. 1, 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.
Die Bürste 3 ist elektromotorisch angetrieben. Der diesbezügliche Elektromotor 7 ist in den Figuren 2 und 3 lediglich schematisch dargestellt. Die Kraftübertragung erfolgt über einen nicht näher dargestellten Riementrieb 8.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.
Der Elektromotor 7 versetzt über den Riementrieb 8 die Bürste 3 in eine Rotationsbewegung um die Achse x mit einer Drehrichtung d, die so gewählt ist, dass bei üblicher Vorbewegung des Vorsatzgerätes 2 in Verfahrrichtung r eine unterstützende Schubwirkung erreicht ist. Wie insbesondere aus der Darstellung in Fig. 2 zu erkennen, ist die Drehrichtung der Bürste 3 so gewählt, dass durch Reibung mit dem Teppichboden 6 eine Bewegungskomponente in Verfahrrichtung r erreicht ist. Mit Bezug zu den Darstellungen ist eine Drehrichtung der Bürste 3 entgegen dem Uhrzeigersinn gewählt.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. As can be seen in particular from the illustration in FIG. 2, the 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. With reference to the illustrations, a direction of rotation of the brush 3 is selected counterclockwise.
Der durch die rotierende Bürste 3 aus dem Teppichboden 6 gelöste Staub bzw. Schmutz wird in üblicher Weise durch den von der Bürste 3 durchtretenen Saugmund 9 und über eine nicht näher dargestellte Saugkanalleitung abtransportiert.The dissolved by the rotating brush 3 from the carpet 6 dust or dirt is transported away in the usual manner by the penetrated by the brush 3 suction port 9 and a Saugkanalleitung not shown.
Bei einer Rückbewegung - wie in Fig. 3 dargestellt - wird das Vorsatzgerät 2 bzw. der Staubsauger 1 entgegen der üblichen Verfahrrichtung r in Rückfahrrichtung r1 bewegt, dies bei weiterhin in Rotationsrichtung d laufender Bürste 3. Letztere wirkt in Zusammenwirkung mit dem Teppichboden 6 entsprechend entgegen dieser Rückbewegungsrichtung r1, womit ein erhöhter Widerstand an der Bürste 3 erreicht wird. Eine Erhöhung des Widerstandes geht einher mit einer Erhöhung des entsprechenden Motorstroms. Dieser Motorstrom wird zur Erfassung der Vor- und Rückbewegung des Vorsatzgerätes 2 genutzt. Hierzu ist eine Messeinrichtung wie bspw. anhand einer ersten Ausführungsform in Fig. 5 dargestellt vorgesehen, die den Motorstrom des die Bürste 3 antreibenden Elektromotors 7 misst und diesen ermittelten Mo- torstromwert mit einem Referenz-Motorstromwert vergleicht.In a return movement - as shown in Fig. 3 - the attachment 2 and the vacuum cleaner 1 is moved against the usual direction of travel r in the return direction r 1 , this in further in the direction of rotation d running brush 3. The latter acts in conjunction with the carpet 6 accordingly against this return direction r 1 , whereby an increased resistance to the brush 3 is achieved. Increasing the resistance is accompanied by an increase in the corresponding motor current. This motor current is used to detect the forward and backward movement of the attachment 2. For this purpose, 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.
Der Referenz-Motorstrom I R-M ist ein aus einer fortlaufenden Messung gemit- telter Motorstrom, wobei zur Bereitstellung des Referenz-Motorstroms I R-M eine Mittlungsschaltung vorgesehen ist, die einen Tiefpass 11 aufweist. Die Zeitkon- stante des Tiefpasses 11 ist gegenüber einer typischen Vor- und Rücklaufzeit des Vorsatzgerätes 2 groß bemessen, so bspw. mit drei Sekunden. Innerhalb dieser Zeit ist in der Regel das Vorsatzgerät 2 zumindest einmal in Vorlaufrichtung r und einmal in Rücklaufrichtung r1 bewegt worden. Der hieraus gemittel- te Wert I R-M ist aktuell angepasst an die Gegebenheiten, so bspw. an den zwi- sehen den Borsten 4 der Bürste 3 und dem Teppichboden 6 aufgebauten Reibwiderstand, welcher wiederum unter anderem abhängig ist von der Teppichflorhöhe.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.
Der relevante Motorstrom I M wird mit Hilfe eines Shunt- Widerstandes 12 er- mittelt, an welchem eine Spannung abfällt, die proportional zum Motorstrom ist.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.
Der momentane Motorstrom I Mwird mit Hilfe eines Komparators 13 mit dem gemittelten Motorstrom I R-M verglichen. Ist der momentane Motorstrom I M geringer als der gemittelte Motorstrom I R, SO ist hieraus auf eine Bewegung des Vorsatzgerätes 2 in üblicher Vorwärtsrichtung r zu schließen. Ist hingegen der momentane Motorstrom I M größer als der gemittelte Motorstrom I R-M, lässt dies auf eine Verlagerung des Vorsatzgerätes 2 in Rückbewegungsrichtung r1 schließen. Selbst der Stillstand des Vorsatzgerätes 2 ist mittels dieser Messein- richtung 10 erfassbar, da hierbei der momentane Motorstrom I M annähernd dem gemittelten Motorstrom I R-M entspricht. In Figur 6 ist eine alternative Schaltungsanordnung dargestellt. Hierbei erfolgt die Signalverarbeitung digital mittels eines Mikroprozessors 14, nachdem das Stromsignal mit Hilfe eines Analog-Digital-Umsetzers 15 digitalisiert wurde.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.
Das gewonnene Bewegungsrichtungssignal kann zur Regelung des Bürstenmotors 7 und/oder des Gebläsemotors im Staubsauger und/oder zur Steuerung von Nebenluf töffnungen in dem den Saugmund 9 des Vorsatzgerätes 2 begrenzenden Bereich benutzt werden. Die Bewegungserfassung erfolgt auf elekt- risch/ elektronischem Wege ohne Inanspruchnahme von insbesondere verschleißanfälligen mechanischen oder optischen/ akustischen Sensorelementen oder dergleichen.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 Nebenluf töffnungen 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.
Alle offenbarten Merkmale sind (für sich) erfindungswesentlich. In die Offen- barung der Anmeldung wird hiermit auch der Offenbarungsinhalt der zugehörigen/beigefügten Prioritätsunterlagen (Abschrift der Voranmeldung) vollinhaltlich mit einbezogen, auch zu dem Zweck, Merkmale dieser Unterlagen in Ansprüche vorliegender Anmeldung mit aufzunehmen. All disclosed features are essential to the invention. The disclosure content of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application.

Claims

ANSPRÜCHE
1. Verfahren zum Erfassen der Vor- und Rückbewegung eines, eine elektromotorisch angetriebene Bürste (3) aufweisenden Vorsatzes (2) eines Staubsau- gers (1), insbesondere eines Haushaltsstaubsaugers, dadurch gekennzeichnet, dass der zum Antrieb der Bürste (3) fließende Motorstrom (I M) gemessen wird und zur Erkennung der Vor- bzw. Rückbewegung mit einem Referenz-Motorstrom (I R-M) verglichen wird.1. A method for detecting the forward and backward movement of a, an electric motor driven brush (3) attachment (2) of a Staubsau- (1), in particular a household vacuum cleaner, characterized in that the motor for driving the brush (3) flowing motor current (IM) is measured and compared with a reference motor current (I RM) for detecting the forward or backward movement.
2. Verfahren nach Anspruch 1 oder insbesondere danach, dadurch gekennzeichnet, dass der Referenz-Motorstrom (I R-M) ein aus einer fortlaufenden Messung gemittelter Motorstrom ist.2. Method according to claim 1 or in particular according thereto, characterized in that the reference motor current (I R-M) is a motor current averaged from a continuous measurement.
3. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche oder insbesondere danach, dadurch gekennzeichnet, dass der ermittelte Motorstrom mit Hilfe eines Tiefpasses (11) gemittelt wird, wobei die Zeitkonstante des Tiefpasses (11) gegenüber eine typischen Vor- und Rücklaufzeit des Vorsatzes (2) groß ist.3. The method according to one or more of the preceding claims or in particular according thereto, characterized in that the determined motor current by means of a low-pass filter (11) is averaged, wherein the time constant of the low-pass filter (11) against a typical forward and return time of the attachment (2 ) is big.
4. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche oder insbesondere danach, dadurch gekennzeichnet, dass der Motorstrom (I M) mit Hilfe eines Shunt- Widerstandes (12) ermittelt wird.4. The method according to one or more of the preceding claims or in particular according thereto, characterized in that the motor current (I M) by means of a shunt resistor (12) is determined.
5. Staubsauger (1), insbesondere Haushaltsstaubsauger, mit einer elektromoto- risch angetriebenen Bürste (3), gekennzeichnet durch eine Messeinrichtung (10), die den Motorstrom (I M) des die Bürste (3) antreibenden Elektromotors (7) misst, wobei ein Vergleicher (13) vorgesehen ist, der den gemessenen Motorstrom (I M) mit einem Referenz-Motorstron (I R-M) vergleicht. 5. Vacuum cleaner (1), in particular household vacuum cleaner, with an electric motor-driven brush (3), characterized by a measuring device (10) which measures the motor current (IM) of the brush (3) driving the electric motor (7), wherein a Comparator (13) is provided, which compares the measured motor current (IM) with a reference motor current (I RM).
6. Staubsauger nach Anspruch 5 oder insbesondere danach, dadurch gekennzeichnet, dass in der Motorstrom-Messeinrichtung (10) ein Shunt- Widerstand (12) vorgesehen ist.6. Vacuum cleaner according to claim 5 or in particular according thereto, characterized in that in the motor current measuring device (10), a shunt resistor (12) is provided.
7. Staubsauger nach einem oder mehreren der Ansprüche 5 bis 6 oder insbesondere danach, dadurch gekennzeichnet, dass zur Bereitstellung des Referenz-Motorstroms (I R-M) eine Mittlungsschaltung vorgesehen ist, die einen Tiefpass (11) aufweist.7. Vacuum cleaner according to one or more of claims 5 to 6 or in particular according thereto, characterized in that for the provision of the reference motor current (I R-M), an averaging circuit is provided which has a low pass (11).
8. Staubsauger nach einem oder mehreren der Ansprüche 5 bis 7 oder insbesondere danach, dadurch gekennzeichnet, dass die Zeitkonstante des Tiefpasses (11) gegenüber einer typischen Vor- und Rücklaufzeit des Staubsaugers (1) groß eingestellt ist. 8. Vacuum cleaner according to one or more of claims 5 to 7 or in particular according thereto, characterized in that the time constant of the low-pass filter (11) compared to a typical flow and return time of the vacuum cleaner (1) is set large.
PCT/EP2005/056861 2004-12-24 2005-12-16 Method for detecting the back-and-forth movement of a vacuum cleaner, and corresponding vacuum cleaner WO2006069923A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2007547468A JP2008525073A (en) 2004-12-24 2005-12-16 Method for discriminating and detecting forward movement and backward movement of a vacuum cleaner, and vacuum cleaner therefor
EP05817402A EP1827194B1 (en) 2004-12-24 2005-12-16 Method for detecting the back-and-forth movement of a vacuum cleaner, and corresponding vacuum cleaner
DE502005010428T DE502005010428D1 (en) 2004-12-24 2005-12-16 METHOD FOR DETECTING THE ROTATION AND RETRACT OF A VACUUM CLEANER AND VACUUM CLEANER THEREFOR
AT05817402T ATE484991T1 (en) 2004-12-24 2005-12-16 METHOD FOR DETECTING THE FORWARD AND BACK MOTION OF A VACUUM CLEANER AND VACUUM CLEANER THEREOF
CN2005800439592A CN101083932B (en) 2004-12-24 2005-12-16 Method for detecting the back-and-forth movement of a vacuum cleaner, and corresponding vacuum cleaner

Applications Claiming Priority (2)

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DE102004062536A DE102004062536A1 (en) 2004-12-24 2004-12-24 Method for detecting the forward and backward movement of a vacuum cleaner and vacuum cleaner for this purpose
DE102004062536.0 2004-12-24

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DE102013102847A1 (en) * 2013-03-20 2014-09-25 Miele & Cie. Kg Method for adjusting the performance of a vacuum cleaner fan, control device for implementing the method and vacuum cleaner with such a control device
DE102014111720A1 (en) * 2014-08-18 2016-02-18 Miele & Cie. Kg Electric brush for a vacuum cleaner with eddy current brake
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CN109276184B (en) 2017-07-21 2022-03-29 添可电器有限公司 Handheld dust collector and control method thereof
CN112493920A (en) * 2020-11-25 2021-03-16 深圳拓邦股份有限公司 Work control method and device of cleaning equipment and cleaning equipment
CN112515578B (en) * 2020-11-25 2022-06-17 深圳拓邦股份有限公司 Work control method and device of cleaning equipment and cleaning equipment
CN115474865A (en) * 2021-06-16 2022-12-16 创科无线普通合伙 Floor cleaner
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ATE484991T1 (en) 2010-11-15
CN101083932B (en) 2010-12-15
EP1827194A1 (en) 2007-09-05
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DE502005010428D1 (en) 2010-12-02
DE102004062536A1 (en) 2006-07-06
RU2007128343A (en) 2009-01-27

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