EP0615718A1 - Self diagnosis device for a vacuum cleaner and operation process - Google Patents

Self diagnosis device for a vacuum cleaner and operation process Download PDF

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Publication number
EP0615718A1
EP0615718A1 EP94101916A EP94101916A EP0615718A1 EP 0615718 A1 EP0615718 A1 EP 0615718A1 EP 94101916 A EP94101916 A EP 94101916A EP 94101916 A EP94101916 A EP 94101916A EP 0615718 A1 EP0615718 A1 EP 0615718A1
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EP
European Patent Office
Prior art keywords
pressure
vacuum cleaner
arrangement according
self
diagnosis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP94101916A
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German (de)
French (fr)
Inventor
Kai Dr. Storjohann
Rainer Dr. Palm
Thomas Dipl.-Ing. Strehler
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Siemens AG
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Siemens AG
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Publication of EP0615718A1 publication Critical patent/EP0615718A1/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2894—Details related to signal transmission in suction cleaners
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/19—Means for monitoring filtering operation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2805—Parameters or conditions being sensed
    • A47L9/2821—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
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
    • A47L9/2842—Suction motors or blowers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2857—User input or output elements for control, e.g. buttons, switches or displays

Definitions

  • Dust-freeers are an integral part of every household these days.
  • the technical development of these devices has led to an ever greater variety of equipment and operation over the years.
  • the large number of equipment features also leads to an increased number of incorrect operation options and possible malfunctions of the devices. This fact makes a better display of device functions desirable for the operator and appears useful as an equipment feature.
  • microfilter that takes into account the increased hygiene needs of the consumer.
  • Previous diagnostic functions on vacuum cleaners have been limited to a dust bag fill indicator, which is coupled to a vacuum sensor.
  • the object on which the invention is based is to provide an improved self-diagnosis arrangement for a vacuum cleaner and a method for its operation.
  • An advantage of the arrangement according to the invention is the use of a plurality of pressure sensors, because this enables precise localization of the pressure drop. A display can then be controlled by a downstream evaluation unit.
  • a particularly favorable display for the operator is a symbolized vacuum cleaner, on which a suction tube, a dust bag and a microfilter are shown separately. These individual segments of a display can then be controlled by the evaluation unit and signal the user directly the location of the fault by lighting up or flashing or the like.
  • Figure 1 shows an example of an arrangement according to the invention.
  • Figure 2 shows an example of an operating method according to the invention for the arrangement.
  • Figure 3 shows the dependence of the engine power on the pressure in the intake manifold.
  • Figure 4 shows an exemplary embodiment of a display unit for such a vacuum cleaner.
  • FIG. 1 shows an exemplary embodiment of an arrangement according to the invention. It shows a vacuum cleaner shown schematically in longitudinal section, with dust bag space S, microfilter M and blower G. Furthermore, the pressure sensors P1 to P3 are shown, P1 being fitted in the suction tube, P2 in the dust bag space and P3 in the blower space. It is advantageous to design the pressure sensor P1 as an analog pressure sensor, since, as will be explained later, the display device can thus be refined. A digital pressure sensor can be advantageously used for the pressure sensors P2 and P3, which emits a signal below a certain pressure.
  • FIG. 2 shows an exemplary embodiment of a method according to the invention for operating the diagnostic arrangement.
  • the sensors which are attached to the arrangement according to the invention are interrogated cyclically and the method according to the invention is run from A to E during each cycle.
  • the question is asked whether the pressure in the intake manifold is greater than a certain power-dependent discrimination pressure, if this is the case, the intake manifold is clogged. If this is not the case, a query is made as to whether the pressure sensor P2 has switched in the dust bag compartment. If so, the dust bag is full and, for example, there is a display that signals that the dust bag is full. If the pressure sensor P3 has switched, this means that the microfilter is clogged and, for example, there is an indication on the display which indicates that a clogged microfilter is to be replaced.
  • FIG. 3 shows the dependency of the pressure measured at the pressure sensor P1 on a set blower output.
  • the pressure curve D1 represents a pressure curve as it occurs with an empty vacuum cleaner and an empty microfilter at maximum operating requirements, ie when vacuuming upholstery or vacuuming very dense, long-pile carpets depending on the suction power.
  • the pressure curve D2 shows the dependence of the pressure measured at the sensor 1 on the blower output Z when the nozzle is blocked, i.e. the suction pipe is blocked. It can be clearly seen that these two curves D1 and D2 run almost parallel and that there is a sufficiently large constant pressure difference between them. This pressure difference can be used to dynamically diagnose an intake manifold blockage as a function of the blower output Z.
  • a straight line G which shows the dependence of the pressure at the sensor P1 on the blower output Z. If a pressure sensor P1 measured pressure value now exceeds the value specified by the straight line at a certain blower output, the intake manifold is clogged and this fact can be displayed.
  • the value range below the straight line always indicates normal operation of the vacuum cleaner. This means that values measured at pressure sensor P1 do not lead to a display on the display, for example.
  • FIG. 4 shows an exemplary display for a diagnostic arrangement according to the invention and an operating method.
  • This display shows schematically a vacuum cleaner with suction tube, dust bag compartment and microfilter, as well as a performance display.
  • the individual symbols are self-explanatory.
  • the diagnostic arrangement determines a corresponding operating state in connection with the operating method, ie for example the suction tube, the dust bag or the microfilter are clogged, this is indicated to the user on this display, for example, by the corresponding display segments flashing.
  • the user can also read the current performance of the vacuum cleaner.
  • the operator can then disassemble the vacuum cleaner accordingly, i.e. either examine the suction tube or replace the dust bag or the microfilter.

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

Abstract

The invention describes a diagnosis device and an operation process therefor, as well as a display for a vacuum cleaner. Particularly advantageous and novel is the combination of three pressure sensors, by means of which accurate localisation of an operating fault of the vacuum cleaner is possible. By evaluation of a connection between set fan power and pressure in the suction pipe, it is possible accurately to distinguish a suction-pipe blockage from a filled dustbag or blocked microfilters. <IMAGE>

Description

Staubstauger sind heutzutage aus keinem Haushalt mehr wegzudenken. Die technische Weiterentwicklung dieser Geräte führte im Laufe der Jahre zu einer immer größeren Ausstattungs- und Bedienungsvielfalt. Die große Zahl der Ausstattungsmerkmale führt auch zu einer gestiegenen Zahl an Fehlbedienungsmöglichkeiten und möglichen Fehlfunktionen der Geräte. Dieser Sachverhalt läßt eine bessere Anzeige von Gerätefunktionen für den Bediener wünschenswert und als Ausstattungsmerkmal sinnvoll erscheinen.Dust-freeers are an integral part of every household these days. The technical development of these devices has led to an ever greater variety of equipment and operation over the years. The large number of equipment features also leads to an increased number of incorrect operation options and possible malfunctions of the devices. This fact makes a better display of device functions desirable for the operator and appears useful as an equipment feature.

Ein Beispiel eines solchen hinzugekommmenen Ausstattungsmerkmals ist ein Mikrofilter, der den gestiegenen Hygienebedürfnissen des Verbrauchers Rechnung trägt. Bisherige Diagnosefunktionen an Staubsaugern beschränken sich auf eine Staubbeutelfüllanzeige, die mit einem Unterdrucksensor gekoppelt ist.An example of such an added feature is a microfilter that takes into account the increased hygiene needs of the consumer. Previous diagnostic functions on vacuum cleaners have been limited to a dust bag fill indicator, which is coupled to a vacuum sensor.

Die der Erfindung zugrundeliegende Aufgabe besteht darin, eine verbesserte Eigendiagnoseanordnung für einen Staubsauger und ein Verfahren für deren Betrieb anzugeben.The object on which the invention is based is to provide an improved self-diagnosis arrangement for a vacuum cleaner and a method for its operation.

Die verbesserte Anordnung ergibt sich gemäß den Merkmalen des Anspruchs 1 und das Verfahren aus den Merkmalen des Anspruchs 4.The improved arrangement results from the features of claim 1 and the method from the features of claim 4.

Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.Further developments of the invention result from the subclaims.

Vorteilhaft an der erfindungsgemäßen Anordnung ist die Verwendung von mehreren Drucksensoren, weil damit eine genaue Lokalisation des Druckabfalls möglich ist. Durch eine nachgeschaltete Auswerteeinheit kann dann eine Anzeige angesteuert werden.An advantage of the arrangement according to the invention is the use of a plurality of pressure sensors, because this enables precise localization of the pressure drop. A display can then be controlled by a downstream evaluation unit.

Vorteilhaft ist es drei Drucksensoren zu verwenden, weil dann auch zwischen einem Druckabfall in dem Staubbeutelraum und einem Druckabfall der durch den Mikrofilter verursacht wird, unterschieden werden kann.It is advantageous to use three pressure sensors, because a distinction can then also be made between a pressure drop in the dust bag space and a pressure drop caused by the microfilter.

Vorteilhaft ist es, bei der erfindungsgemäßen Anordnung einen proportionalen Drucksensor zu verwenden, weil die absolute Höhe des Druckes in Abhängigkeit von der eingestellten Gebläseleistung des Staubsaugers charakteristisch ist für eine Saugrohrverstopfung bzw. einen gefüllten Staubbeutel.It is advantageous to use a proportional pressure sensor in the arrangement according to the invention, because the absolute level of the pressure as a function of the set blower output of the vacuum cleaner is characteristic of a suction pipe blockage or a filled dust bag.

Vorteilhaft kann mit dem erfindungsgemäßen Verfahren die Tatsache ausgenutzt werden, daß die einzelnen Sensoren im Strömungskanal nacheinander geschaltet sind. So kann mit dem sukzessiven Ansprechen der einzelnen Sensoren genau der Ort einer Störung lokalisiert werden.The fact that the individual sensors are connected in series in the flow channel can advantageously be used with the method according to the invention. With the successive activation of the individual sensors, the exact location of a fault can be localized.

Besonders vorteilhaft ist die Verwendung des erfindungsgemäßen Verfahrens in Verbindung mit einem Drucksensor der ein druckproportionales Ausgangssignal liefert. Damit ist es möglich, in der Auswerteeinheit zwischen einer Saugrohrverstopfung und einem gefüllten Staubbeutel zu unterscheiden. Dies ergibt sich daraus, daß in Abhängigkeit von der eingestellten Gebläseleistung ein bestimmter Mindestdruck im Saugrohr vorherrschen muß. Falls dieser Druck überschritten wird, liegt eine Saugrohrverstopfung vor.It is particularly advantageous to use the method according to the invention in connection with a pressure sensor which delivers a pressure-proportional output signal. This makes it possible to distinguish between an intake manifold blockage and a filled dust bag in the evaluation unit. This results from the fact that, depending on the fan power set, a certain minimum pressure must prevail in the intake manifold. If this pressure is exceeded, the intake manifold is blocked.

Besonders günstig ist es die für eine Diskriminierung verwendete Abhängigkeit vom Mindestdruck zur Leistung linear zu gestalten, da der Schaltungsaufwand dafür gering ist.It is particularly favorable to make the dependency on the minimum pressure to the power used for discrimination linear, since the circuitry involved is low.

Besonders günstig ist es, die erfindungsgemäße Anordnung und das Betriebsverfahrens dazu zu kombinieren, um den Benutzer eine genaue Meldung über eine Betriebsstörung zukommen zu lassen.It is particularly expedient to combine the arrangement according to the invention and the operating method in order to provide the user with an accurate message about an operating fault.

Eine besonders günstige Anzeige für den Bediener stellt ein symbolisierter Staubsauger dar, auf der ein Saugrohr einen Staubbeutel und ein Mikrofilter separat dargestellt sind. Diese einzelnen Segmente einer Anzeige können dann von der Auswerteeinheit angesteuert werden und signalisieren dem Benutzer direkt den Ort der Störung durch Aufleuchten oder Blinken oder ähnliches.A particularly favorable display for the operator is a symbolized vacuum cleaner, on which a suction tube, a dust bag and a microfilter are shown separately. These individual segments of a display can then be controlled by the evaluation unit and signal the user directly the location of the fault by lighting up or flashing or the like.

Im folgenden wird die Erfindung anhand von Figuren weiter erläutert.The invention is explained in more detail below with reference to figures.

Figur 1 zeigt ein Beispiel einer erfindungsgemäßen Anordnung.
Figur 2 zeigt ein Beispiel eines erfindungsgemäßen Betriebsverfahrens für die Anordnung.
Figur 3 zeigt die Abhängigkeit der Motorleistung von dem Druck im Saugrohr.
Figur 4 zeigt eine beispielhafte Ausführungsform einer Anzeigeeinheit für einen solchen Staubsauger.Figure 1 shows an example of an arrangement according to the invention.
Figure 2 shows an example of an operating method according to the invention for the arrangement.
Figure 3 shows the dependence of the engine power on the pressure in the intake manifold.
Figure 4 shows an exemplary embodiment of a display unit for such a vacuum cleaner.

In Figur 1 ist eine beispielhafte Ausführungsform einer erfinduungsgemäßen Anordnung dargestellt. Sie zeigt einen schematisiert im Längsschnitt dargestellten Staubsauger, mit Staubbeutelraum S, Mikrofilter M und Gebläse G. Weiterhin sind dargestellt die Drucksensoren P1 bis P3, wobei P1 im Saugrohr, P2 im Staubbeutelraum und P3 im Gebläseraum angebracht ist. Vorteilhaft ist es, den Drucksensor P1 als analogen Drucksensor auszuführen, da wie später noch erläutert wird, die Anzeigeeinrichtung damit verfeinert werden kann. Für die Drucksensoren P2 und P3 kann vorteilhaft ein digitaler Drucksensor eingesetzt werden, der unterhalb eines bestimmten Druckes ein Signal abgibt.1 shows an exemplary embodiment of an arrangement according to the invention. It shows a vacuum cleaner shown schematically in longitudinal section, with dust bag space S, microfilter M and blower G. Furthermore, the pressure sensors P1 to P3 are shown, P1 being fitted in the suction tube, P2 in the dust bag space and P3 in the blower space. It is advantageous to design the pressure sensor P1 as an analog pressure sensor, since, as will be explained later, the display device can thus be refined. A digital pressure sensor can be advantageously used for the pressure sensors P2 and P3, which emits a signal below a certain pressure.

Figur 2 zeigt eine beispielhafte Ausführungsform eines erfindungsgemäßen Verfahrens zum Betrieb der Diagnoseanordnung. Die Abfrage der Sensoren, welche an der erfindungsgemäßen Anordnung angebracht sind, erfolgt zyklisch und während jedes Zyklus wird das erfindungsgemäße Verfahren von A nach E durchlaufen. Zunächst wird von A ausgehend abgefragt, ob der Druck im Saugrohr größer als ein bestimmter leistungsabhängiger Diskriminierungsdruck ist, falls dies der Fall ist, ist das Saugrohr verstopft. Falls dies nicht der Fall ist, wird abgefragt, ob der Drucksensor P2 im Staubbeutelraum geschaltet hat. Falls ja ist der Staubbeutel voll und es erfolgt beispielsweise eine Anzeige auf dem Display, die signalisiert, daß der Staubbeutel voll ist. Falls der Drucksensor P3 geschaltet hat, bedeutet dies, daß der Mikrofilter verstopft ist und es erfolgt beispielsweise eine Anzeige auf dem Display, welche anzeigt, daß ein verstopfter Mikrofilter auszutauschen ist.FIG. 2 shows an exemplary embodiment of a method according to the invention for operating the diagnostic arrangement. The sensors which are attached to the arrangement according to the invention are interrogated cyclically and the method according to the invention is run from A to E during each cycle. First, starting from A, the question is asked whether the pressure in the intake manifold is greater than a certain power-dependent discrimination pressure, if this is the case, the intake manifold is clogged. If this is not the case, a query is made as to whether the pressure sensor P2 has switched in the dust bag compartment. If so, the dust bag is full and, for example, there is a display that signals that the dust bag is full. If the pressure sensor P3 has switched, this means that the microfilter is clogged and, for example, there is an indication on the display which indicates that a clogged microfilter is to be replaced.

Für den Fall, daß keine dieser Bedingungen vorliegt, ist alles in Ordnung und es wird nach E verzweigt.In the event that none of these conditions are present, everything is OK and a branch is made to E.

In Figur 3 ist die Abhängigkeit des am Drucksensor P1 gemessenen Druckes von einer eingestellten Gebläseleistung dargestellt. Mit der Druckkurve D1 ist ein Druckverlauf dargestellt, wie er beim leeren Staubsauger und leerem Mikrofilter bei maximalen Betriebserfordernissen, d.h. beim Saugen von Polstern bzw. bei Saugen von sehr dichten langfloorigen Teppichböden in Abhängigkeit von der Saugleistung auftritt.FIG. 3 shows the dependency of the pressure measured at the pressure sensor P1 on a set blower output. The pressure curve D1 represents a pressure curve as it occurs with an empty vacuum cleaner and an empty microfilter at maximum operating requirements, ie when vacuuming upholstery or vacuuming very dense, long-pile carpets depending on the suction power.

Die Druckkurve D2 zeigt die Abhängigkeit des am Sensor 1 gemessenen Druckes von der Gebläseleistung Z, wenn die Düse verstopft wird, d.h. das Saugrohr verstopft wird. Deutlich ist zu erkennen, daß diese beiden Kurven D1 und D2 nahezu parallel verlaufen und daß sich zwischen ihnen ein genügend großer konstanter Druckunterschied befindet. Über diesen Druckunterschied kann in Abhängigkeit von der Gebläseleistung Z dynamisch eine Saugrohrverstopfung diagnostiziert werden.The pressure curve D2 shows the dependence of the pressure measured at the sensor 1 on the blower output Z when the nozzle is blocked, i.e. the suction pipe is blocked. It can be clearly seen that these two curves D1 and D2 run almost parallel and that there is a sufficiently large constant pressure difference between them. This pressure difference can be used to dynamically diagnose an intake manifold blockage as a function of the blower output Z.

Besonders einfach ist es, der Auswerteeinheit, welche diese Diagnose vornehmen kann, eine Gerade G vorzugeben, welche die Abhängigkeit des Druckes am Sensor P1 von der Gebläseleistung Z wiedergibt. Überschreitet nun ein Drucksensor P1 gemessener Druckwert den Wert der durch die Gerade vorgegeben wird bei einer bestimmten Gebläseleistung, so ist das Saugrohr verstopft und dieser Sachverhalt kann angezeigt werden. Der Wertebereich unterhalb der Gerade markiert immer einen Normalbetrieb des Staubsaugers. Das heißt am Drucksensor P1 gemessene Werte führen beispielsweise nicht zu einer Anzeige auf dem Display.It is particularly simple to give the evaluation unit, which can carry out this diagnosis, a straight line G, which shows the dependence of the pressure at the sensor P1 on the blower output Z. If a pressure sensor P1 measured pressure value now exceeds the value specified by the straight line at a certain blower output, the intake manifold is clogged and this fact can be displayed. The value range below the straight line always indicates normal operation of the vacuum cleaner. This means that values measured at pressure sensor P1 do not lead to a display on the display, for example.

In Figur 4 ist ein beispielhaftes Display für eine erfindungsgemäße Diagnoseanordnung und ein Betriebsverfahren dargestellt. Diese Anzeige zeigt schematisch einen Staubsauger mit Saugrohr, Staubbeutelraum und Mikrofilter, sowie eine Leistungsanzeige. Die einzelnen Symbole sind selbsterklärend. In dieser beispielhaften Ausführungsform des Displays ist es möglich einzelne Segmente unterschiedlich anzusteuern und blinken zu lassen. Falls nun die Diagnoseanorndung in Verbindung mit dem Betriebsverfahren einen entsprechenden Betriebszustand feststellt, d.h. beispielsweise das Saugrohr, der Staubbeutel oder der Mikrofilter sind verstopft, wird dies auf diesem Display beispielsweise durch ein Blinken der entsprechenden Anzeigensegmente dem Benutzer kenntlich gemacht. Weiterhin kann der Benutzer die augenblickliche Leistung des Staubsaugers ablesen.FIG. 4 shows an exemplary display for a diagnostic arrangement according to the invention and an operating method. This display shows schematically a vacuum cleaner with suction tube, dust bag compartment and microfilter, as well as a performance display. The individual symbols are self-explanatory. In this exemplary embodiment of the display, it is possible to control individual segments differently and to have them flash. If the diagnostic arrangement determines a corresponding operating state in connection with the operating method, ie for example the suction tube, the dust bag or the microfilter are clogged, this is indicated to the user on this display, for example, by the corresponding display segments flashing. The user can also read the current performance of the vacuum cleaner.

Als Folge der angezeigten Betriebsstörung kann der Bediener dann den Staubsauger entsprechend zerlegen, d.h. entweder das Saugrohr untersuchen bzw. den Staubbeutel oder den Mikrofilter austauschen.As a result of the indicated malfunction, the operator can then disassemble the vacuum cleaner accordingly, i.e. either examine the suction tube or replace the dust bag or the microfilter.

Claims (9)

Eigendiagnoseanordnung für einen Staubsauger, a) bei der mindestens ein erster Drucksensor zur Aufnahme eines Saugrohrdruckes in einem Saugrohr des Staubsaugers vorgesehen ist, b) bei der mindestens ein zweiter Drucksensor zur Aufnahme eines Staubbeutelraumdruckes in einem Staubbeutelraum des Staubsaugers vorgesehen ist, c) und bei der eine Auswerteeinheit vorgesehen ist, die zu Diagnosezwecken einen Vergleich von Drucksignalen durchgeführt, welche von mindestens dem ersten und zweiten Drucksensor abgegeben werden. Self-diagnosis arrangement for a vacuum cleaner, a) in which at least one first pressure sensor is provided for recording a suction pipe pressure in a suction pipe of the vacuum cleaner, b) in which at least one second pressure sensor is provided for recording a dust bag compartment pressure in a dust bag compartment of the vacuum cleaner, c) and in which an evaluation unit is provided which, for diagnostic purposes, carries out a comparison of pressure signals which are emitted by at least the first and second pressure sensors. Anordnung nach Anspruch 1, bei der mindestens der erste Drucksensor ein einem vorherrschenden Meßdruck proportionales Drucksignal abgibt.Arrangement according to Claim 1, in which at least the first pressure sensor emits a pressure signal proportional to a prevailing measurement pressure. Anordnung nach einem der Ansprüche 1 oder 2, bei der alle Drucksensoren bezüglich einer Saugströmung hintereinander angeordnet sind.Arrangement according to one of claims 1 or 2, in which all pressure sensors are arranged one behind the other with respect to a suction flow. Eigendiagnoseanordnung nach einem der Ansprüche 1 bis 3, bei der mindestens ein dritter Drucksensor zur Aufnahme eines Gebläseraumdruckes in einem Gebläseraum des Staubsaugers vorgesehen ist, wobei ein Mikrofilter den Staubbeutelraum und den Gebläseraum des Staubsaugers voneinander trennt, dessen Drucksignal auch von der Auswerteeinheit ausgewertet wird.Self-diagnosis arrangement according to one of Claims 1 to 3, in which at least one third pressure sensor is provided for recording a blower chamber pressure in a blower chamber of the vacuum cleaner, a microfilter separating the dust bag chamber and the blower chamber of the vacuum cleaner, the pressure signal of which is also evaluated by the evaluation unit. Verfahren zum Betrieb einer Eigendiagnoseanordnung nach Anspruch 4, a) bei dem der dritte Drucksensor einen Wechsel des Mikrofilters anzeigt, b) bei dem der zweite und dritte Drucksensor einen Staubbeutelwechsel anzeigt, c) bei dem der erste und zweite und dritte Drucksensor eine Saugrohrverstopfung anzeigt. Method for operating a self-diagnosis arrangement according to claim 4, a) in which the third pressure sensor indicates a change of the microfilter, b) in which the second and third pressure sensors indicate a change of dust bag, c) in which the first and second and third pressure sensors indicate an intake manifold blockage. Verfahren zum Betrieb einer Eigendiagnoseanordnung nach Anspruch 5,
bei dem in Abhängigkeit einer wählbar vorgegebenen Gebläseleistung ein Mindestmeßdruck am ersten Drucksensor überschritten werden muß, um eine Saugrohrverstopfung anzuzeigen.Method for operating a self-diagnosis arrangement according to claim 5,
at which a minimum measuring pressure at the first pressure sensor has to be exceeded as a function of a selectively predetermined blower output in order to indicate that the intake manifold is blocked. Verfahren nach Anspruch 6, bei dem die Abhängigkeit zwischen Mindestmeßdruck und Gebläseleistung linear ist.Method according to Claim 6, in which the relationship between the minimum measuring pressure and the blower output is linear. Anordnung nach einem der Ansprüche 1 bis 4, die nach einem der Verfahren nach Anspruch 5 bis 7 betrieben wird, bei der eine Anzeigevorrichtung vorgesehen ist mit der einem Bediener eine Eigendiagnose signalisiert wird.Arrangement according to one of claims 1 to 4, which is operated according to one of the methods according to claims 5 to 7, in which a display device is provided with which a self-diagnosis is signaled to an operator. Anordnung nach Anspruch 8, bei der die Anzeigevorrichtung einen Staubsauger symbolisiert und bei der die Eigendiagnose über das entsprechende Staubsaugerteil angezeigt wird.Arrangement according to claim 8, in which the display device symbolizes a vacuum cleaner and in which the self-diagnosis is displayed via the corresponding vacuum cleaner part.
EP94101916A 1993-02-12 1994-02-08 Self diagnosis device for a vacuum cleaner and operation process Withdrawn EP0615718A1 (en)

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DE19934304264 DE4304264A1 (en) 1993-02-12 1993-02-12 Self-diagnosis for a vacuum cleaner and method for its operation
DE4304264 1993-02-12

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Publication number Priority date Publication date Assignee Title
WO1995028122A1 (en) * 1994-04-15 1995-10-26 Vorwerk & Co. Interholding Gmbh Vacuum cleaner with suction power indicator
DE10124234B4 (en) * 2001-05-18 2007-02-01 Wilhelm Fette Gmbh Rotary milling tool
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EP3678787A4 (en) * 2017-09-05 2021-06-02 Husqvarna AB Separator, separator system and methods of their operation
US11607640B2 (en) 2017-09-05 2023-03-21 Husqvarna Ab Separator, separator system and methods of their operation

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