EP2598008B1 - Device and method for using a vacuum cleaner - Google Patents

Device and method for using a vacuum cleaner Download PDF

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Publication number
EP2598008B1
EP2598008B1 EP11731345.2A EP11731345A EP2598008B1 EP 2598008 B1 EP2598008 B1 EP 2598008B1 EP 11731345 A EP11731345 A EP 11731345A EP 2598008 B1 EP2598008 B1 EP 2598008B1
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EP
European Patent Office
Prior art keywords
main filter
vacuum cleaner
detection unit
differential pressure
pressure sensor
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EP11731345.2A
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German (de)
French (fr)
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EP2598008A2 (en
Inventor
Silvio Hamm
Roland Illig
Stefan Kraft
Thomas Strehler
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.)
BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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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
    • A47L9/2805—Parameters or conditions being sensed
    • A47L9/2821—Pressure, vacuum level or airflow
    • 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
    • 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
    • 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

Definitions

  • the invention relates to an apparatus and a method for operating a vacuum cleaner.
  • Known vacuum cleaners are usually operated with an insertable into a dust chamber of the vacuum cleaner filter paper filter bag as the main filter.
  • Vacuum cleaners are also known in which reusable dust collecting containers are used as the main filter. If it is forgotten in such vacuum cleaners to use a main filter in the form of a replaceable filter bag or a dust collector, there is a risk that the sucked dirt, especially lint and threads, get into the engine fan and cause damage there. In addition, a dirt-filled dust chamber in the vacuum cleaner is very difficult to empty and clean.
  • various embodiments of mechanical filter locks are known, which are essentially all based on either preventing the starting of the fan motor when the main filter is missing or preventing the dust chamber cover from closing.
  • Such a mechanical filter lock is for example in the DE 101 63 525 A1 described.
  • the present invention seeks to provide a vacuum cleaner and a method for operating a vacuum cleaner, which can be detected easily and safely, whether a main filter is inserted into the vacuum cleaner or not.
  • a vacuum cleaner comprises a pressure sensor system for detecting a variable which characterizes a negative pressure in a first region lying in the suction flow direction to the receiving space, a detection unit which detects depending on the detected size, whether a main filter is used, and a control unit which Preventing a startup of the vacuum cleaner and / or outputs a warning information to an operator of the vacuum cleaner, if it is detected that no main filter is used.
  • the method according to the invention provides that a variable is detected which characterizes a negative pressure in a first region lying in the suction flow direction after the receiving space, is detected as a function of the detected variable, whether a main filter is inserted, and prevents a startup of the vacuum cleaner and / or warning information is issued to an operator of the vacuum cleaner if it is detected that no main filter is inserted.
  • the main filter forms in the inserted state a resistance in the suction air flow (suction flow), which leads to a change in the pressure conditions in the area after the main filter.
  • suction flow suction flow
  • a much higher (absolute) negative pressure in the area after the main filter forms.
  • commissioning can not be allowed.
  • a controllable switching element may be provided, with the aid of an electrical supply line to the fan motor can be interrupted.
  • warning information for example in the form of an advertisement on a display or by activating a warning lamp, can be output, so that the operator of the vacuum cleaner is informed of the missing main filter.
  • the detection by means of a pressure sensor system offers the additional advantage that pressure sensor systems are already present in many vacuum cleaners, e.g. for detecting the degree of filling of the main filter. In this case, no additional hardware components are required for the "electronic filter barrier" realized according to the invention, which leads to considerable cost savings.
  • the pressure sensor system can detect the negative pressure in the first area lying in the suction flow direction after the receiving space directly by means of an analog pressure sensor.
  • the detection unit compares the detected negative pressure with a predefinable negative pressure threshold value and detects that no main filter is used when the negative pressure is below the negative pressure threshold value.
  • a similar functionality of the pressure sensor system is realized according to the invention with the aid of a pressure switch, which transmits an output signal to the detection unit, when the negative pressure in the first region is above a predeterminable negative pressure threshold.
  • the detection unit detects that no main filter is inserted when no output signal is received from the pressure switch.
  • the negative pressure in the area downstream of the receiving space for the main filter need not be detected directly. It is also sufficient to measure a quantity which characterizes the negative pressure in this area. For example, a differential pressure between a lying in Saugstromraum before receiving the second area and the in Suction current direction after the receiving space lying first area to be detected.
  • the detection unit can then compare the detected differential pressure with a predefinable differential pressure threshold value and, depending on the result of the comparison, detect whether or not a main filter has been inserted (differential pressure threshold exceeded).
  • the differential pressure can be determined particularly easily with the aid of an analog differential pressure sensor. Alternatively, however, at least two pressure sensors may be provided, wherein a first pressure sensor measures a first negative pressure in the first region and a second pressure sensor measures a second negative pressure in the second region. An evaluation unit can then determine the differential pressure as the difference between the first and the second negative pressure.
  • a further embodiment of the invention provides that the pressure sensor system comprises at least one differential pressure switch, which transmits an output signal to the detection unit when the differential pressure is above a predefinable differential pressure threshold, and the detection unit detects that no main filter is used when no output signal from the pressure switch is received.
  • FIG. 1 is a vacuum cleaner, in particular a vacuum cleaner, shown schematically and designated by the reference numeral 10.
  • the canister vacuum cleaner 10 has a housing 12. A arranged on the front side of the vacuum cleaner 10 connecting piece 14 is attached to the housing 2. At the connecting piece 14, a suction hose 16 is connected, which is connected to a floor nozzle 18, which is pushed over this for cleaning a bottom surface.
  • a dust chamber 20 In the housing 2 is a dust chamber 20, which also includes a receiving space 22 for a main filter 24 in the form of an exchangeable filter bag or a reusable dust collection container.
  • a non-illustrated fan motor is included in the housing 12. Since the general structure of such a vacuum cleaner is well known, it will not be discussed further.
  • the sucked by the blower motor air passes while sucking on the floor nozzle 18 and the hose 16 in the main filter, which filters out the dust and / or dirt particles, then passes the fan motor and passes through outlet openings, also not shown again from the vacuum cleaner housing 12 to the outside.
  • the vacuum cleaner 10 is therefore equipped with a system that allows to reliably detect whether a main filter 24 is used or not.
  • the vacuum cleaner 10 comprises a pressure sensor system 30, 30 ', 30 "(see. FIGS. 2 to 4 ) for detecting a magnitude, which characterizes a negative pressure in a lying in Saugstromraum after the receiving space 22 first region.
  • FIG. 2 shows a schematic representation of a first embodiment of the device according to the invention.
  • the control device comprises the pressure sensor system 30 which has a pressure sensor 32 which detects the negative pressure in the first region lying in the suction flow direction after the receiving region 22 and thus also in the inserted state of the main filter 24 after the main filter 24.
  • the suction flow direction is represented by corresponding arrows.
  • the pressure sensor 32 is designed as a pressure switch.
  • a detection unit 34 electrically connected to the pressure sensor 32 can compare the detected negative pressure with a predefinable negative pressure threshold value and, in the event that the negative pressure is below the negative pressure threshold value, detect that no main filter 24 has been inserted .
  • a pressure switch is used as the pressure sensor 32, which transmits an output signal to the detection unit 34 when the negative pressure in the first region is above the predeterminable negative pressure threshold value. If the detection unit 34 does not receive an output signal from the pressure switch, it detects that no main filter 24 is inserted.
  • a control unit 36 coupled to the detection unit 34 prevents the start-up of the vacuum cleaner, e.g. by actively interrupting the supply line to the blower motor, and / or outputs a warning information to an operator of the vacuum cleaner.
  • the detection unit 34 is in FIG. 2 shown as part of the control unit 36, but can also be realized separately from this. This also applies to the following further embodiments of the invention.
  • FIG. 3 shows a schematic representation of a second embodiment of the device according to the invention.
  • the control device comprises the pressure sensor system 30 'which comprises a differential pressure sensor 40 which detects a differential pressure between the first region lying in the suction flow direction after the receiving space 22 and a second region lying in the suction flow direction in front of the receiving space 22. As shown, this second region can be in the region between the dust chamber 20 and the outlet openings or even within the dust chamber 20.
  • the differential pressure sensor 40 is designed as a differential pressure switch.
  • a detection unit 34 'coupled to the differential pressure sensor 40 can detect the detected negative pressure with a compare predetermined differential pressure threshold and for the case that the differential pressure is below the differential pressure threshold, detect that no main filter 24 is inserted.
  • a differential pressure switch is used as a pressure sensor 40, which transmits an output signal to the detection unit 34 'when the negative pressure in the first range is above the predefinable differential pressure threshold value. If the detection unit 34 'does not receive an output signal from the differential pressure switch, it detects that no main filter 24 is inserted.
  • Analogous to the first embodiment according to Fig. 2 prevents a control unit 36 'coupled to the detection unit 34' to start up the vacuum cleaner and / or issues warning information to an operator of the vacuum cleaner.
  • FIG. 4 shows a schematic representation of a non-claimed third embodiment.
  • This embodiment differs from the second embodiment according to FIG Fig. 3 only in that the differential pressure is not detected by a single differential pressure sensor 40, but the pressure sensor system 30 "comprises two analog pressure sensors 50 and 52, wherein a first pressure sensor 52 has a first negative pressure in the first range and the second pressure sensor 50 a second negative pressure in the The differential pressure is then determined by an evaluation unit 54 as the difference between the first and the second negative pressure.
  • the evaluation unit 54 is in FIG. 4 shown as part of the control unit 36, but can also be realized separately from this, or also be integrated into the detection unit.

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

Description

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Betreiben eines Staubsaugers.The invention relates to an apparatus and a method for operating a vacuum cleaner.

Bekannte Staubsauger werden üblicherweise mit einem in einen Staubraum des Staubsaugers einsetzbaren Wechselfilterbeutel aus Papier als Hauptfilter betrieben. Es sind auch Staubsauger bekannt, bei welchen wieder verwendbare Staubsammelbehälter als Hauptfilter zum Einsatz kommen. Wird bei derartigen Staubsaugern vergessen, einen Hauptfilter in Form eines Wechselfilterbeutels oder eines Staubsammelbehälters einzusetzen, so besteht die Gefahr, dass der angesaugte Schmutz, insbesondere Flusen und Fäden, in das Motorgebläse gelangen und dort zu Beschädigungen führen. Zudem ist ein mit Schmutz gefüllter Staubraum im Staubsauger nur sehr schlecht zu entleeren und zu reinigen. Zur Vermeidung dieser Probleme sind verschiedene Ausführungsformen von mechanischen Filtersperren bekannt, die im Wesentlichen alle darauf beruhen, bei fehlendem Hauptfilter entweder das Anlaufen des Gebläsemotors zu verhindern oder aber ein Verschließen des Staubraumdeckels zu verhindern.Known vacuum cleaners are usually operated with an insertable into a dust chamber of the vacuum cleaner filter paper filter bag as the main filter. Vacuum cleaners are also known in which reusable dust collecting containers are used as the main filter. If it is forgotten in such vacuum cleaners to use a main filter in the form of a replaceable filter bag or a dust collector, there is a risk that the sucked dirt, especially lint and threads, get into the engine fan and cause damage there. In addition, a dirt-filled dust chamber in the vacuum cleaner is very difficult to empty and clean. To avoid these problems, various embodiments of mechanical filter locks are known, which are essentially all based on either preventing the starting of the fan motor when the main filter is missing or preventing the dust chamber cover from closing.

Eine derartige mechanische Filtersperre ist zum Beispiel in der DE 101 63 525 A1 beschrieben.Such a mechanical filter lock is for example in the DE 101 63 525 A1 described.

Nachteilig an den bekannten mechanischen Filtersperren ist aber, dass.sie aufwendige konstruktive Maßnahmen bedingen, welche einen zusätzlichen Kostenaufwand bedeuten.A disadvantage of the known mechanical filter locks, however, is that they require complex constructive measures, which mean an additional cost.

Schließlich sei noch auf die EP 03 62 894 A2 sowie der DE 689 16 607 T2 hingewiesen, welche jeweils einen Staubsauger beschreiben, der ein Drucksensorsystem zum Erfassen einer Größe, welche einen Unterdruck in einem in Saugstromrichtung nach dem Aufnahmeraum für den Hauptfilter liegenden Bereich charakterisiert. Gemäß der EP 03 62 894 A2 soll mit diesem Drucksensorsystem der Betriebsstand erfasst werden.Finally, be on the EP 03 62 894 A2 as well as the DE 689 16 607 T2 , each of which describes a vacuum cleaner, which characterizes a pressure sensor system for detecting a magnitude, which characterizes a negative pressure in a lying in Saugstromrichtung after the receiving space for the main filter area. According to the EP 03 62 894 A2 The operating status should be recorded with this pressure sensor system.

In der internationalen Offenlegungsschrift WO 2007/084543 A2 , die einen Staubsauger mit einem Gehäuse, einem rückwärtigen Griff, einem Lufteinlass, einem Gebläse, einer Staubaufnahme und einem oder mehreren vorderseitigen Griffen betrifft, wird erwähnt, dass es bekannt sei, die an einem dem Motor nachgeschalteten oder einem anderen Filter anliegende Druckdifferenz mit konventionellen Drucksensoren zu messen. Hierdurch könne festgestellt werden, ob der betreffende Filter verstopft ist oder fehlt, wobei Letzteres durch die Feststellung eines geringen oder keines Druckabfalls an den Sensoren angezeigt würde. Durch eine entsprechende Elektronik könne ein Benutzer darauf aufmerksam gemacht werden, dass der Filter fehlt oder eine Wartungsmaßnahme notwendig ist.In the international publication WO 2007/084543 A2 relating to a vacuum cleaner with a housing, a rear handle, an air inlet, a blower, a dust receiver and one or more front handles is mentioned, that it is known to measure at a downstream of the engine or another filter pressure difference with conventional pressure sensors. In this way it can be determined whether the filter in question is clogged or missing, the latter being indicated by the detection of little or no pressure drop across the sensors. Through appropriate electronics, a user can be made aware that the filter is missing or a maintenance measure is necessary.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, einen Staubsauger und ein Verfahren zum Betreiben eines Staubsaugers anzugeben, wobei einfach und sicher detektiert werden kann, ob ein Hauptfilter in den Staubsauger eingesetzt ist oder nicht.Proceeding from this, the present invention seeks to provide a vacuum cleaner and a method for operating a vacuum cleaner, which can be detected easily and safely, whether a main filter is inserted into the vacuum cleaner or not.

Diese Aufgabe wird erfindungsgemäß durch einen Staubsauger und ein Verfahren mit den Merkmalen gemäß der unabhängigen Patentansprüche gelöst.This object is achieved by a vacuum cleaner and a method having the features according to the independent claims.

Demgemäß umfasst ein erfindungsgemäßer Staubsauger ein Drucksensorsystem zum Erfassen einer Größe, welche einen Unterdruck in einem in Saugstromrichtung nach dem Aufnahmeraum liegenden ersten Bereich charakterisiert, eine Detektionseinheit, welche in Abhängigkeit von der erfassten Größe detektiert, ob ein Hauptfilter eingesetzt ist, und eine Steuereinheit, welche eine Inbetriebnahme des Staubsaugers verhindert und/oder eine Warninformation an eine Bedienperson des Staubsaugers ausgibt, falls detektiert wird, dass kein Hauptfilter eingesetzt ist.Accordingly, a vacuum cleaner according to the invention comprises a pressure sensor system for detecting a variable which characterizes a negative pressure in a first region lying in the suction flow direction to the receiving space, a detection unit which detects depending on the detected size, whether a main filter is used, and a control unit which Preventing a startup of the vacuum cleaner and / or outputs a warning information to an operator of the vacuum cleaner, if it is detected that no main filter is used.

Das erfindungsgemäße Verfahren sieht vor, dass eine Größe erfasst wird, welche einen Unterdruck in einem in Saugstromrichtung nach dem Aufnahmeraum liegenden ersten Bereich charakterisiert, in Abhängigkeit von der erfassten Größe detektiert wird, ob ein Hauptfilter eingesetzt ist, und eine Inbetriebnahme des Staubsaugers verhindert und/oder eine Warninformation an eine Bedienperson des Staubsaugers ausgegeben wird, falls detektiert wird, dass kein Hauptfilter eingesetzt ist.The method according to the invention provides that a variable is detected which characterizes a negative pressure in a first region lying in the suction flow direction after the receiving space, is detected as a function of the detected variable, whether a main filter is inserted, and prevents a startup of the vacuum cleaner and / or warning information is issued to an operator of the vacuum cleaner if it is detected that no main filter is inserted.

Der Hauptfilter bildet im eingesetzten Zustand einen Widerstand im Saugluftstrom (Saugstrom), was zu einer Veränderung der Druckverhältnisse im Bereich nach dem Hauptfilter führt. Konkret bildet sich mit eingesetztem Hauptfilter ein weitaus höherer (absoluter) Unterdruck im Bereich nach dem Hauptfilter aus. Durch Auswertung dieses Unterdrucks kann folglich einfach und sicher detektiert werden, ob ein Hauptfilter in Form eines Wechselfilterbeutels oder eines Staubsammelbehälters eingesetzt ist oder nicht. Um eine Schädigung des Staubsaugers, insbesondere des Gebläsemotors, zu verhindern, kann für den Fall, dass kein Hauptfilter detektiert wird, eine Inbetriebnahme gar nicht zugelassen werden. Dazu kann z.B. ein steuerbares Schaltelement vorgesehen sein, mit dessen Hilfe eine elektrische Versorgungsleitung zum Gebläsemotor unterbrochen werden kann. Alternativ oder zusätzlich kann aber auch eine Warninformation, z.B. in Form einer Anzeige auf einem Display oder durch Aktivieren einer Warnlampe, ausgegeben werden, so dass die Bedienperson des Staubsaugers auf den fehlenden Hauptfilter hingewiesen wird.The main filter forms in the inserted state a resistance in the suction air flow (suction flow), which leads to a change in the pressure conditions in the area after the main filter. Specifically, with the main filter inserted, a much higher (absolute) negative pressure in the area after the main filter forms. By evaluating this negative pressure, it is consequently possible to detect simply and reliably whether a main filter in the form of an exchangeable filter bag or a dust collection container is inserted or not. In order to prevent damage to the vacuum cleaner, in particular the blower motor, in the event that no main filter is detected, commissioning can not be allowed. For this example, a controllable switching element may be provided, with the aid of an electrical supply line to the fan motor can be interrupted. Alternatively or additionally, however, warning information, for example in the form of an advertisement on a display or by activating a warning lamp, can be output, so that the operator of the vacuum cleaner is informed of the missing main filter.

Die Detektion mit Hilfe eines Drucksensorsystems bietet den zusätzlichen Vorteil, dass Drucksensorsysteme in vielen Staubsaugern ohnehin vorhanden sind, z.B. zur Detektion des Füllgrades des Hauptfilters. In diesem Fall sind für die erfindungsgemäß realisierte "elektronische Filtersperre" keinerlei zusätzlichen Hardwarekomponenten erforderlich, was zu einer erheblichen Kostenersparnis führt.The detection by means of a pressure sensor system offers the additional advantage that pressure sensor systems are already present in many vacuum cleaners, e.g. for detecting the degree of filling of the main filter. In this case, no additional hardware components are required for the "electronic filter barrier" realized according to the invention, which leads to considerable cost savings.

Das Drucksensorsystem kann den Unterdruck in dem in Saugstromrichtung nach dem Aufnahmeraum liegenden ersten Bereich direkt mit Hilfe eines analogen Drucksensors erfassen. Die Detektionseinheit vergleicht dann den erfassten Unterdruck mit einem vorgebbaren Unterdruck-Schwellwert und detektiert, dass kein Hauptfilter eingesetzt ist, wenn der Unterdruck unterhalb des Unterdruck-Schwellwertes liegt.The pressure sensor system can detect the negative pressure in the first area lying in the suction flow direction after the receiving space directly by means of an analog pressure sensor. The detection unit then compares the detected negative pressure with a predefinable negative pressure threshold value and detects that no main filter is used when the negative pressure is below the negative pressure threshold value.

Eine ähnliche Funktionalität des Drucksensorsystems wird erfindungsgemäß mit Hilfe eines Druckschalters realisiert, welcher ein Ausgangssignal an die Detektionseinheit überträgt, wenn der Unterdruck in dem ersten Bereich über einem vorgebbaren Unterdruck-Schwellwert liegt. In diesem Fall detektiert die Detektionseinheit, dass kein Hauptfilter eingesetzt ist, wenn kein Ausgangssignal von dem Druckschalter empfangen wird.A similar functionality of the pressure sensor system is realized according to the invention with the aid of a pressure switch, which transmits an output signal to the detection unit, when the negative pressure in the first region is above a predeterminable negative pressure threshold. In this case, the detection unit detects that no main filter is inserted when no output signal is received from the pressure switch.

Diese Ausführungsformen haben den Vorteil, dass ein einziger Drucksensor zur sicheren Detektion des Hauptfilters ausreicht.These embodiments have the advantage that a single pressure sensor is sufficient for reliable detection of the main filter.

Der Unterdruck im Bereich nach dem Aufnahmeraum für den Hauptfilter muss aber nicht direkt erfasst werden. Es ist auch ausreichend, eine Größe zu messen, welchen den Unterdruck in diesem Bereich charakterisiert. So kann z.B. ein Differenzdruck zwischen einem in Saugstromrichtung vor dem Aufnahmeraum liegenden zweiten Bereich und dem in Saugstromrichtung nach dem Aufnahmeraum liegenden ersten Bereich erfasst werden. Die Detektionseinheit kann dann den erfassten Differenzdruck mit einem vorgebbaren Differenzdruck-Schwellwert vergleichen und abhängig vom Vergleichsergebnis detektieren, ob ein Hauptfilter eingesetzt ist (Differenzdruck-Schwellwert überschritten) oder nicht.However, the negative pressure in the area downstream of the receiving space for the main filter need not be detected directly. It is also sufficient to measure a quantity which characterizes the negative pressure in this area. For example, a differential pressure between a lying in Saugstromrichtung before receiving the second area and the in Suction current direction after the receiving space lying first area to be detected. The detection unit can then compare the detected differential pressure with a predefinable differential pressure threshold value and, depending on the result of the comparison, detect whether or not a main filter has been inserted (differential pressure threshold exceeded).

Besonders einfach lässt sich der Differenzdruck mit Hilfe eines analogen Differenzdrucksensors ermitteln. Alternativ können aber auch mindestens zwei Drucksensoren vorgesehen sein, wobei ein erster Drucksensor einen ersten Unterdruck in dem ersten Bereich und ein zweiter Drucksensor einen zweiten Unterdruck in dem zweiten Bereich misst. Eine Auswerteeinheit kann dann den Differenzdruck als Differenz zwischen dem ersten und dem zweiten Unterdruck ermitteln.The differential pressure can be determined particularly easily with the aid of an analog differential pressure sensor. Alternatively, however, at least two pressure sensors may be provided, wherein a first pressure sensor measures a first negative pressure in the first region and a second pressure sensor measures a second negative pressure in the second region. An evaluation unit can then determine the differential pressure as the difference between the first and the second negative pressure.

Eine weitere Ausführungsform der Erfindung sieht vor, dass das Drucksensorsystem mindestens einen Differenzdruckschalter umfasst, welcher ein Ausgangssignal an die Detektionseinheit überträgt, wenn der Differenzdruck über einem vorgebbaren Differenzdruck-Schwellwert liegt, und die Detektionseinheit detektiert, dass kein Hauptfilter eingesetzt ist, wenn kein Ausgangssignal von dem Druckschalter empfangen wird.A further embodiment of the invention provides that the pressure sensor system comprises at least one differential pressure switch, which transmits an output signal to the detection unit when the differential pressure is above a predefinable differential pressure threshold, and the detection unit detects that no main filter is used when no output signal from the pressure switch is received.

Weitere Merkmale und Vorteile der Erfindung werden nachfolgend anhand von Ausführungsbeispielen mit Bezugnahme auf die beigefügten Figuren erläutert.Further features and advantages of the invention will be explained below with reference to embodiments with reference to the accompanying figures.

Es zeigen:

Fig. 1
eine schematische Darstellung eines Staubsaugers,
Fig. 2
ein schematisches Blockdiagramm einer ersten Ausführungsform des erfindungsgemäßen Staubsaugers,
Fig. 3
ein schematisches Blockdiagramm einer zweiten Ausführungsform des erfindungsgemäßen Staubsaugers und
Fig. 4
ein schematisches Blockdiagramm einer dritten, nicht beanspruchten Ausführungsform
Show it:
Fig. 1
a schematic representation of a vacuum cleaner,
Fig. 2
a schematic block diagram of a first embodiment of the vacuum cleaner according to the invention,
Fig. 3
a schematic block diagram of a second embodiment of the vacuum cleaner according to the invention and
Fig. 4
a schematic block diagram of a third, not claimed embodiment

In Figur 1 ist ein Staubsauger, insbesondere ein Bodenstaubsauger, schematisch dargestellt und mit dem Bezugszeichen 10 gekennzeichnet. Der Bodenstaubsauger 10 weist ein Gehäuse 12 auf. Ein an der Frontseite des Staubsaugers 10 angeordneter Anschlussstutzen 14 ist am Gehäuse 2 befestigt. Am Anschlussstutzen 14 ist ein Saugschlauch 16 angeschlossen, der mit einer Bodendüse 18 verbunden ist, welche zum Reinigen einer Bodenfläche über diese geschoben wird. Im Gehäuse 2 befindet sich ein Staubraum 20, welcher auch einen Aufnahmeraum 22 für einen Hauptfilter 24 in Form eines Wechselfilterbeutels oder eines wieder verwendbaren Staubsammelbehälters umfasst. Darüber hinaus ist in dem Gehäuse 12 ein nicht dargestellter Gebläsemotor enthalten. Da der allgemeine Aufbau eines solchen Bodenstaubsaugers allgemein bekannt ist, wird darauf nicht weiter eingegangen.In FIG. 1 is a vacuum cleaner, in particular a vacuum cleaner, shown schematically and designated by the reference numeral 10. The canister vacuum cleaner 10 has a housing 12. A arranged on the front side of the vacuum cleaner 10 connecting piece 14 is attached to the housing 2. At the connecting piece 14, a suction hose 16 is connected, which is connected to a floor nozzle 18, which is pushed over this for cleaning a bottom surface. In the housing 2 is a dust chamber 20, which also includes a receiving space 22 for a main filter 24 in the form of an exchangeable filter bag or a reusable dust collection container. In addition, a non-illustrated fan motor is included in the housing 12. Since the general structure of such a vacuum cleaner is well known, it will not be discussed further.

Die vom Gebläsemotor angesaugte Luft gelangt beim Saugen über die Bodendüse 18 und den Schlauch 16 in den Hauptfilter, der die Staub- und/oder Schmutzpartikel herausfiltert, passiert dann den Gebläsemotor und gelangt über ebenfalls nicht dargestellte Auslassöffnungen wieder aus dem Staubsaugergehäuse 12 nach außen.The sucked by the blower motor air passes while sucking on the floor nozzle 18 and the hose 16 in the main filter, which filters out the dust and / or dirt particles, then passes the fan motor and passes through outlet openings, also not shown again from the vacuum cleaner housing 12 to the outside.

Wird bei derartigen Staubsaugern vergessen, einen Hauptfilter 22 einzusetzen, so besteht die Gefahr, dass angesaugter Schmutz, insbesondere Flusen und Fäden, in den Gebläsemotor gelangen und diesen beschädigen. Zudem ist ein mit Schmutz gefüllter Staubraum 20 im Staubsauger 10 nur sehr schlecht zu entleeren und zu reinigen. Der Staubsauger 10 ist daher mit einem System ausgestattet, das es erlaubt, sicher zu detektieren, ob ein Hauptfilter 24 eingesetzt ist oder nicht.If you forget to use a main filter 22 in such vacuum cleaners, so there is a risk that sucked dirt, especially lint and threads, get into the blower motor and damage it. In addition, a filled with dirt dust chamber 20 in the vacuum cleaner 10 is very difficult to empty and clean. The vacuum cleaner 10 is therefore equipped with a system that allows to reliably detect whether a main filter 24 is used or not.

Dazu umfasst der Staubsauger 10 ein Drucksensorsystem 30, 30', 30" (vgl. Figuren 2 bis 4) zum Erfassen einer Größe, welche einen Unterdruck in einem in Saugstromrichtung nach dem Aufnahmeraum 22 liegenden ersten Bereich charakterisiert.For this purpose, the vacuum cleaner 10 comprises a pressure sensor system 30, 30 ', 30 "(see. FIGS. 2 to 4 ) for detecting a magnitude, which characterizes a negative pressure in a lying in Saugstromrichtung after the receiving space 22 first region.

Figur 2 zeigt eine schematische Darstellung einer ersten Ausführungsform der erfindungsgemäßen Vorrichtung. Die Steuerungsvorrichtung umfasst das Drucksensorsystem 30, welches einen Drucksensor 32 aufweist, welcher den Unterdruck in dem in Saugstromrichtung nach dem Aufnahmebereich 22 und damit im eingesetzten Zustand des Hauptfilters 24 auch nach dem Hauptfilter 24 liegenden ersten Bereich erfasst. Die Saugstromrichtung ist durch entsprechende Pfeile dargestellt. Der Drucksensor 32 ist dabei als Druckschalter ausgestaltet. FIG. 2 shows a schematic representation of a first embodiment of the device according to the invention. The control device comprises the pressure sensor system 30 which has a pressure sensor 32 which detects the negative pressure in the first region lying in the suction flow direction after the receiving region 22 and thus also in the inserted state of the main filter 24 after the main filter 24. The suction flow direction is represented by corresponding arrows. The pressure sensor 32 is designed as a pressure switch.

Wird ein analoger Drucksensor eingesetzt, so kann eine mit dem Drucksensor 32 elektrisch verbundene Detektionseinheit 34 den erfassten Unterdruck mit einem vorgebbaren Unterdruck-Schwellwert vergleichen und für den Fall, dass der Unterdruck unterhalb des Unterdruck-Schwellwertes liegt, detektieren, dass kein Hauptfilter 24 eingesetzt ist. Gemäß einer Ausführungsform der Erfindung wird ein Druckschalter als Drucksensor 32 eingesetzt, welcher ein Ausgangssignal an die Detektionseinheit 34 überträgt, wenn der Unterdruck in dem ersten Bereich über dem vorgebbaren Unterdruck-Schwellwert liegt. Empfängt die Detektionseinheit 34 kein Ausgangssignal von dem Druckschalter, so detektiert sie, dass kein Hauptfilter 24 eingesetzt ist.If an analog pressure sensor is used, then a detection unit 34 electrically connected to the pressure sensor 32 can compare the detected negative pressure with a predefinable negative pressure threshold value and, in the event that the negative pressure is below the negative pressure threshold value, detect that no main filter 24 has been inserted , According to one embodiment of the invention, a pressure switch is used as the pressure sensor 32, which transmits an output signal to the detection unit 34 when the negative pressure in the first region is above the predeterminable negative pressure threshold value. If the detection unit 34 does not receive an output signal from the pressure switch, it detects that no main filter 24 is inserted.

Wird von der Detektionseinheit 34 festgestellt, dass kein Hauptfilter 24 eingesetzt ist, so verhindert eine mit der Detektionseinheit 34 gekoppelte Steuereinheit 36 die Inbetriebnahme des Staubsaugers, z.B. durch aktive Unterbrechung der Versorgungsleitung zum Gebläsemotor, und/oder gibt eine Warninformation an eine Bedienperson des Staubsaugers aus.If it is determined by the detection unit 34 that no main filter 24 is used, then a control unit 36 coupled to the detection unit 34 prevents the start-up of the vacuum cleaner, e.g. by actively interrupting the supply line to the blower motor, and / or outputs a warning information to an operator of the vacuum cleaner.

Die Detektionseinheit 34 ist in Figur 2 als Bestandteil der Steuereinheit 36 dargestellt, kann aber auch getrennt von dieser realisiert sein. Dies gilt auch für die noch folgenden weiteren Ausführungsformen der Erfindung.The detection unit 34 is in FIG. 2 shown as part of the control unit 36, but can also be realized separately from this. This also applies to the following further embodiments of the invention.

Figur 3 zeigt eine schematische Darstellung einer zweiten Ausführungsform der erfindungsgemäßen Vorrichtung. Die Steuerungsvorrichtung umfasst das Drucksensorsystem 30', welches einen Differenzdrucksensor 40 umfasst, welcher einen Differenzdruck zwischen dem in Saugstromrichtung nach dem Aufnahmeraum 22 liegenden ersten Bereich, und einem in Saugstromrichtung vor dem Aufnahmeraum 22 liegenden zweiten Bereich erfasst. Dieser zweite Bereich kann, wie dargestellt, im Bereich zwischen Staubraum 20 und Auslassöffnungen liegen oder auch noch innerhalb des Staubraums 20. Der Differenzdrucksensor 40 ist dabei als Differenzruckschalter ausgestaltet. FIG. 3 shows a schematic representation of a second embodiment of the device according to the invention. The control device comprises the pressure sensor system 30 'which comprises a differential pressure sensor 40 which detects a differential pressure between the first region lying in the suction flow direction after the receiving space 22 and a second region lying in the suction flow direction in front of the receiving space 22. As shown, this second region can be in the region between the dust chamber 20 and the outlet openings or even within the dust chamber 20. The differential pressure sensor 40 is designed as a differential pressure switch.

Wird ein analoger Differenzdrucksensor eingesetzt, so kann eine mit dem Differenzdrucksensor 40 gekoppelte Detektionseinheit 34' den erfassten Unterdruck mit einem vorgebbaren Differenzdruck-Schwellwert vergleichen und für den Fall, dass der Differenzdruck unterhalb des Differenzdruck-Schwellwertes liegt, detektieren, dass kein Hauptfilter 24 eingesetzt ist. Gemäß einer Ausführungsform der Erfindung wird ein Differenzdruckschalter als Drucksensor 40 eingesetzt, welcher ein Ausgangssignal an die Detektionseinheit 34' überträgt, wenn der Unterdruck in dem ersten Bereich über dem vorgebbaren Differenzdruck-Schwellwert liegt. Empfängt die Detektionseinheit 34' kein Ausgangssignal von dem Differenzdruckschalter, so detektiert sie, dass kein Hauptfilter 24 eingesetzt ist.If an analog differential pressure sensor is used, then a detection unit 34 'coupled to the differential pressure sensor 40 can detect the detected negative pressure with a compare predetermined differential pressure threshold and for the case that the differential pressure is below the differential pressure threshold, detect that no main filter 24 is inserted. According to one embodiment of the invention, a differential pressure switch is used as a pressure sensor 40, which transmits an output signal to the detection unit 34 'when the negative pressure in the first range is above the predefinable differential pressure threshold value. If the detection unit 34 'does not receive an output signal from the differential pressure switch, it detects that no main filter 24 is inserted.

Analog zur ersten Ausführungsform gemäß Fig. 2 verhindert eine mit der Detektionseinheit 34' gekoppelte Steuereinheit 36' die Inbetriebnahme des Staubsaugers und/oder gibt eine Warninformation an eine Bedienperson des Staubsaugers aus.Analogous to the first embodiment according to Fig. 2 prevents a control unit 36 'coupled to the detection unit 34' to start up the vacuum cleaner and / or issues warning information to an operator of the vacuum cleaner.

Figur 4 zeigt eine schematische Darstellung einer nicht beanspruchten dritten Ausführungsform. Diese Ausführungsform unterscheidet sich von der zweiten Ausführungsform gemäß Fig. 3 lediglich dadurch, dass der Differenzdruck nicht durch einen einzelnen Differenzdrucksensor 40 erfasst wird, sondern das Drucksensorsystem 30" zwei analoge Drucksensoren 50 und 52 umfasst, wobei ein erster Drucksensor 52 einen ersten Unterdruck in dem ersten Bereich und der zweite Drucksensor 50 einen zweiten Unterdruck in dem zweiten Bereich misst. Der Differenzdruck wird dann durch eine Auswerteeinheit 54 als Differenz zwischen dem ersten und dem zweiten Unterdruck ermittelt. FIG. 4 shows a schematic representation of a non-claimed third embodiment. This embodiment differs from the second embodiment according to FIG Fig. 3 only in that the differential pressure is not detected by a single differential pressure sensor 40, but the pressure sensor system 30 "comprises two analog pressure sensors 50 and 52, wherein a first pressure sensor 52 has a first negative pressure in the first range and the second pressure sensor 50 a second negative pressure in the The differential pressure is then determined by an evaluation unit 54 as the difference between the first and the second negative pressure.

Die Auswerteeinheit 54 ist in Figur 4 als Bestandteil der Steuereinheit 36 dargestellt, kann aber auch getrennt von dieser realisiert sein, oder auch in die Detektionseinheit integriert sein.The evaluation unit 54 is in FIG. 4 shown as part of the control unit 36, but can also be realized separately from this, or also be integrated into the detection unit.

Bezugszeichenreference numeral

1010
Staubsaugervacuum cleaner
1212
Gehäusecasing
1414
Anschlussstutzenspigot
1616
Saugschlauchsuction
1818
Bodendüsefloor nozzle
2020
Staubraumdust chamber
2222
Aufnahmeraumaccommodation space
2424
Hauptfiltermain filter
30, 30', 30"30, 30 ', 30 "
DrucksensorsystemPressure Sensor System
3232
Drucksensorpressure sensor
34, 34'34, 34 '
Detektionseinheitdetection unit
36, 36'36, 36 '
Steuereinheitcontrol unit
4040
DifferenzdrucksensorDifferential Pressure Sensor
50, 5250, 52
Drucksensorenpressure sensors
5454
Auswerteeinheitevaluation

Claims (4)

  1. Vacuum cleaner (10) with a receptacle (22) for a main filter (24) with
    - a pressure sensor system (30; 30'; 30") for detecting a variable which characterises a vacuum in a first area lying in the suction flow direction after the receptacle (22),
    - a detection unit (34; 34') which detects, as a function of the detected variable, whether a main filter (24) is inserted, and
    - a control unit (36; 36'), which prevents the vacuum cleaner (10) being put into operation and/or outputs warning information to a person operating the vacuum cleaner (10) if it is detected that no main filter (24) is inserted,
    characterised in that
    - the pressure sensor system (30) comprises at least one pressure switch (32) which transmits an output signal to the detection unit (34) if the vacuum in the first area lies above a predeterminable vacuum threshold value and
    - the detection unit (34) detects that no main filter (24) is inserted if no output signal is received from the pressure switch (32).
  2. Vacuum cleaner according to the preamble of claim 1, characterised in that
    - the pressure sensor system (30') comprises at least one differential pressure switch (40), which transmits an output signal to the detection unit (34') if the differential pressure lies above a predeterminable differential pressure threshold value, and
    - the detection unit (34) detects that no main filter (24) is inserted if no output signal is received from the differential pressure switch (40).
  3. Method for operating a vacuum cleaner (10) with a receptacle (22) for a main filter (24), in which
    - a variable is detected which characterises a vacuum in a first area lying in the suction flow direction after the compartment (22),
    - it is detected, as a function of the detected variable, whether a main filter (24) is inserted, and
    - the vacuum cleaner (10) is prevented from being put into operation and/or warning information is output to a person operating the vacuum cleaner (10) if it is detected that no main filter (24) is inserted,
    characterised in that
    - the pressure sensor system (30) comprises at least one pressure switch (32) which transmits an output signal to the detection unit (34) if the vacuum in the first area lies above a predeterminable vacuum threshold value and
    - the detection unit (34) detects that no main filter (24) is inserted if no output signal is received from the pressure switch (32).
  4. Method for operating a vacuum cleaner (10) according to the preamble of claim 3, characterised in that
    - the pressure sensor system (30') comprises at least one differential pressure switch (40), which transmits an output signal to the detection unit (34'), if the differential pressure lies above a predeterminable differential pressure threshold value, and
    - the detection unit (34') detects that no main filter (24) is inserted if no output signal is received from the differential pressure switch (40).
EP11731345.2A 2010-07-28 2011-07-12 Device and method for using a vacuum cleaner Active EP2598008B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010038577 DE102010038577B4 (en) 2010-07-28 2010-07-28 Apparatus and method for operating a vacuum cleaner
PCT/EP2011/061809 WO2012013483A2 (en) 2010-07-28 2011-07-12 Device and method for operating a vacuum cleaner

Publications (2)

Publication Number Publication Date
EP2598008A2 EP2598008A2 (en) 2013-06-05
EP2598008B1 true EP2598008B1 (en) 2015-03-04

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Application Number Title Priority Date Filing Date
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DE (1) DE102010038577B4 (en)
WO (1) WO2012013483A2 (en)

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WO2019025566A1 (en) 2017-08-03 2019-02-07 Alfred Kärcher SE & Co. KG Method for operating a suction unit, and suction unit
US10660497B2 (en) 2017-06-12 2020-05-26 Emerson Electric Co. Upright vacuum cleaner having switch to detect a filter assembly

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WO2021251871A1 (en) * 2020-06-11 2021-12-16 Husqvarna Ab Filter arrangements for industrial dust extractors
SE545877C2 (en) * 2020-06-11 2024-02-27 Husqvarna Ab Filter arrangements for industrial dust extractors
WO2022216257A1 (en) * 2021-04-05 2022-10-13 Karaca Züccaci̇ye Ti̇caret Ve Sanayi̇ Anoni̇m Şi̇rketi̇ Electric vacuum cleaner

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US5155885A (en) * 1988-10-07 1992-10-20 Hitachi, Ltd. Vacuum cleaner and method for operating the same
DE8901003U1 (en) * 1989-01-21 1989-04-06 Interlava AG, Lugano Device for automatically controlling the suction power of a vacuum cleaner
DE69107119D1 (en) * 1990-04-16 1995-03-16 Hitachi Ltd Method of operating a vacuum cleaner.
US5920043A (en) * 1997-08-19 1999-07-06 Kinergy Industrial Co., Ltd. Circuit breaker control device for a vacuum cleaners dust hopper
DE10163525B4 (en) * 2001-12-21 2004-03-25 BSH Bosch und Siemens Hausgeräte GmbH Filter lock for a vacuum cleaner
WO2007084543A2 (en) * 2006-01-17 2007-07-26 Electrolux Home Care Products North America Stair cleaning vacuum cleaner

Cited By (4)

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Publication number Priority date Publication date Assignee Title
US10660497B2 (en) 2017-06-12 2020-05-26 Emerson Electric Co. Upright vacuum cleaner having switch to detect a filter assembly
US11185202B2 (en) 2017-06-12 2021-11-30 Emerson Electric Co. Upright vacuum cleaner having microswitch and filter assembly
WO2019025566A1 (en) 2017-08-03 2019-02-07 Alfred Kärcher SE & Co. KG Method for operating a suction unit, and suction unit
DE102017117684A1 (en) * 2017-08-03 2019-02-07 Alfred Kärcher SE & Co. KG Method for operating a suction device and suction device

Also Published As

Publication number Publication date
DE102010038577B4 (en) 2012-02-23
WO2012013483A2 (en) 2012-02-02
EP2598008A2 (en) 2013-06-05
DE102010038577A1 (en) 2012-02-02
WO2012013483A3 (en) 2012-03-29

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