EP2384679A2 - Display device for a filter, and vacuum cleaner with such a filter as waste air filter - Google Patents

Display device for a filter, and vacuum cleaner with such a filter as waste air filter Download PDF

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Publication number
EP2384679A2
EP2384679A2 EP11401060A EP11401060A EP2384679A2 EP 2384679 A2 EP2384679 A2 EP 2384679A2 EP 11401060 A EP11401060 A EP 11401060A EP 11401060 A EP11401060 A EP 11401060A EP 2384679 A2 EP2384679 A2 EP 2384679A2
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EP
European Patent Office
Prior art keywords
filter
vacuum cleaner
display device
thermal expansion
counter
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EP11401060A
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German (de)
French (fr)
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EP2384679B1 (en
EP2384679A3 (en
Inventor
Seyfettin Kara
Monika Seifert
Stefan Tiekötter
Cornelius Wolf
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Miele und Cie KG
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Miele und Cie KG
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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
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/19—Means for monitoring filtering operation

Definitions

  • the invention relates to a display device for a filter, in particular a filter acting as a vacuum cleaner exhaust filter.
  • the display device is provided for displaying a degree of saturation of the filter.
  • the invention relates to a filter with such a display device, that is, a filter combined with a display device or a system comprising the filter and the display device.
  • the invention relates to a vacuum cleaner with such a filter and the use of such a filter as a vacuum cleaner exhaust filter.
  • Vacuum cleaners in particular electric vacuum cleaners in a version as a household vacuum cleaner, work almost exclusively with multi-stage particle filters.
  • a vacuum cleaner fan prefilter - preferably designed as a dust bag - and behind an exhaust filter for removing fine dust that still passes the bag are usually provided.
  • the latter takes e.g. nor the abrasion of carbon brushes or the like of the drive motor of the fan.
  • Both filter stages must be replaced as consumables by the user of the vacuum cleaner.
  • a user must be reliably and conveniently signaled when the bag or the exhaust filter must be changed as a result of reaching an upper limit for a filling or saturation.
  • For the dust bag sensors are usually used, which operate on the differential pressure principle.
  • the exhaust filter is known to use an operating time of the filter as a criterion for a required replacement.
  • a time counter is considered, which is reset manually after inserting the exhaust filter by the user and the expiration of a fixed operating time signals the necessary change of the filter.
  • the algorithm for this and necessary operating and display elements are implemented in a vacuum cleaner control or part of the vacuum cleaner control.
  • the DE 102 29 796 describes a filter with a temperature-dependent integrating consumption indicator.
  • the color of the indicator changes depending on the temperature always when the vacuum cleaner is operated for a long time.
  • the DE 602 05 753 T2 describes time-dependent consumption indicators that must be activated by the user by opening a fluid store. A colored indicator liquid diffuses into an absorbent material in the consumption indicator, which then discolors over time and thus represents a measure of the useful life.
  • the operating time as a criterion for a required filter change does not take into account or not yet optimally an actual load situation of the filter, because the pure, linear time sequence is not able to represent the actual and over time varying usage behavior.
  • a filter in particular a vacuum cleaner exhaust filter, with means for generating a consumption or saturation-compliant filter change signal.
  • a filter change indicator that can be actuated due to thermal expansion, in particular a mechanically actuatable filter change indicator.
  • the operation of the display device that is, a filter that acts as Staubsaugerabluftfilter, during operation of the vacuum cleaner, resulting heat, in particular exhaust heat, is a good measure of a useful life and type of the filter, so that from a thermal expansion of a consumption and / or saturable filter change signal is derivable.
  • a derivation operable due to thermal expansion filter change indicator is provided for such a derivation operable due to thermal expansion filter change indicator.
  • the filter change indicator can, for. B. be read by the operator and thus acts as an optical signal for a necessary filter change to the user.
  • a filter of the type described here and hereinafter is, in particular, a vacuum cleaner exhaust filter, that is to say a filter which is arranged in the exhaust air flow of the suction fan of an electric vacuum cleaner, which is e.g. acts as a particulate matter or hygiene filter and is sometimes referred to as a blow-out or post-filter.
  • the display device for actuating the filter change indicator due to thermal expansion comprises an actuator that includes a heat-expandable medium.
  • the actuating element is flown together with the display device of the air to be filtered, so that during operation results in a heating, which leads to a thermal expansion of the existing medium in the actuator.
  • This thermal expansion is converted by the actuator into a mechanical actuation of the filter change indicator.
  • Such an actuator is simple and low maintenance despite the mechanical effect.
  • the actuating element comprises an actuating lever which is movable with thermal expansion of the medium.
  • the actuating lever is a particularly simple way for a mechanical contact between the actuating element and the filter change indicator, so that its actuation can be effected by the actuating lever of the actuating element.
  • a heat-expandable medium for the actuator wax comes into consideration. Such a medium reacts sufficiently for the intended application with a thermal expansion to a temperature increase.
  • a heat-expandable medium such as wax or the like is sufficiently viscous, so that z. B. for a movable with the wax at thermal expansion operating lever no special precautions for its positioning and adjustment are provided.
  • a filter change indicator is preferably a counter or the like into consideration.
  • a counter as a filter change indicator, this can register each actuation by the actuator and provide a display of a number of actuations above a predetermined or predeterminable threshold value, which alerts a user to the need for filter change.
  • the counter can assume a position acting as a change mark, wherein the counter is configured so that the change mark adjusts after a predetermined number of actuation operations by the actuator.
  • the counter can be configured as an up-counting or down-counting counter.
  • the counter In the delivery condition of the display device or a filter combined with such a display device, the counter is set to a start configuration correlated with the filter or can be set to such a start configuration.
  • the counter counts up or down on each actuation by the actuator until the counter assumes the position acting as a change mark.
  • the indication of the change flag by the counter then acts as a signal to the user for a required filter change.
  • the display device of the type described here and below can be combined with basically any filters, so that the invention accordingly also relates to a filter with a display device described here and below.
  • filter is especially a so-called vacuum cleaner exhaust filter into consideration.
  • the invention thus also relates to a vacuum cleaner with such a display device or a vacuum cleaner with a combined with such a display device filter, in particular a vacuum cleaner exhaust filter with a based on the approach of the invention display device.
  • the filter combined with the display device functions as a vacuum cleaner exhaust filter in an exhaust duct of a vacuum cleaner provided by the vacuum cleaner, thermal expansion for the thermal expansion actuatable filter change indicator results in operation of the vacuum cleaner due to the exhaust air flow of the suction fan.
  • the exhaust air flow of the suction fan is a good measure of the operating mode and the operating time of the vacuum cleaner and thus the load on the filter, so that a position of the filter change indicator after a number of actuation operations by the actuator information about a saturation of the filter or possibly already reached Saturation limit of the filter.
  • the invention finally also relates to a use of a filter with a display device, as described here and below, as a vacuum cleaner exhaust filter in the exhaust air stream of a suction fan of an electric vacuum cleaner.
  • Fig. 1 shows a vacuum cleaner 10 known per se, which has a dust chamber 12 with there attachable dust bag 14.
  • a dust bag 14 supplied dust via a suction hose 16 is collected.
  • the dust 18 in turn is transported by the suction flow 20, the blower 22 (vacuum cleaner fan) generated.
  • the dust chamber 12 is closed by means of a dust chamber cover 24. Finer components of the dust 18 that pass through the dust bag 14, pass through the exhaust air or the suction flow 20 of the blower 22 in a vacuum cleaner exhaust filter 26th
  • the vacuum cleaner 10 comprises a control computer 28, which is in operative connection with a vacuum cleaner 10 arranged on the operating and display unit 30. About the signals of the control and display unit 30, the suction power of the fan 22 and thus a quantity of recordable dust 18 is set by the control computer 28 through the vacuum cleaner 10.
  • Fig. 2 shows an embodiment of a display device 40 in a with a filter 42 shown only partially, for. B. a vacuum cleaner exhaust filter 26 ( Fig. 1 ), combined configuration.
  • the filter 42 is a so-called HEPA filter which comprises an activated carbon layer 44 on a filter input side and a filter medium 46 following this.
  • the display device 40 is integrated into the filter 42 so that it laterally adjoins the filter medium 46. Any other position is just as conceivable for the display device 40, z. As a surrounded on all sides by the filter medium 46 position.
  • the display device 40 includes a heat exchange actuatable filter change indicator 48 as a counter.
  • the operation of the filter change indicator 48 is carried out with an actuating element 50. This includes for actuating the filter change indicator 48 due to thermal expansion of a heat-expandable medium 52, z. B. wax.
  • an actuating lever 54 is held, which with appropriate thermal expansion of the heat-expandable medium 52 the Filter change indicator 48 is actuated.
  • a corresponding thereto and actuatable by the actuating lever 54 of the actuating element 50 counteracting lever is shown for actuating the filter change indicator 48.
  • the filter change indicator 48 is shown as a counter and, more particularly, it is a mechanical counter that performs a count step upon each actuation by the actuator 50. Notwithstanding the illustrated label of the counter with Arabic numerals is also a use of a color code or the like into consideration, so that z. B. when reaching a predetermined or predetermined counter reading of the counter at a functioning as a change display 56 visible side three, or depending on the number of rollers of the counter, one or more red fields are, which represent a filter change signal for the user of the filter 42 in combination.
  • a display device 40 for a filter 42, in particular a vacuum cleaner exhaust filter 26, with an actuatable due to thermal expansion filter change indicator 48 is given, so that the thermal expansion as a measure of the type of use and duration of Filters 42 can be used and with a particular mechanical actuation of the filter change indicator 48 due to such thermal expansion of a user perceptible signal, in particular in the form of an optical indication generated, the information about a degree of saturation or possibly already reached saturation upper limit of the filter 42 ,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Electric Vacuum Cleaner (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)

Abstract

The device (40) has a filter replacement indicator (48) operated by an operating element (50) based on thermal expansion, where the operating element includes a thermally expandable medium (52) i.e. wax. The operating element has an operating lever (54) that is moved with the thermal expansion of the medium. The indicator has a mechanical counter for adjusting change marking based on a predetermined number of operations by the operating element. A counter operating lever is operated by the operating lever, where the indicator device is arranged lateral to a filter medium. An independent claim is also included for a vacuum cleaner comprising a filter.

Description

Die Erfindung betrifft eine Anzeigevorrichtung für einen Filter, insbesondere einen als Staubsaugerabluftfilter fungierenden Filter. Die Anzeigevorrichtung ist zur Darstellung eines Sättigungsgrads des Filters vorgesehen. Weiter betrifft die Erfindung einen Filter mit einer solchen Anzeigevorrichtung, also einen mit einer Anzeigevorrichtung kombinierten Filter oder ein System, das den Filter und die Anzeigevorrichtung umfasst. Weiter betrifft die Erfindung einen Staubsauger mit einem solchen Filter und die Verwendung eines solchen Filters als Staubsaugerabluftfilter.The invention relates to a display device for a filter, in particular a filter acting as a vacuum cleaner exhaust filter. The display device is provided for displaying a degree of saturation of the filter. Furthermore, the invention relates to a filter with such a display device, that is, a filter combined with a display device or a system comprising the filter and the display device. Furthermore, the invention relates to a vacuum cleaner with such a filter and the use of such a filter as a vacuum cleaner exhaust filter.

Staubsauger, insbesondere Elektrostaubsauger in einer Ausführung als Haushaltsstaubsauger, arbeiten fast ausschließlich mit mehrstufigen Partikelfiltern. So sind in der Regel vor einem Staubsaugergebläse ein Vorfilter - vorzugsweise als Staubbeutel ausgeführt - und dahinter ein Abluftfilter zur Beseitigung von Feinstaub, der den Beutel noch passiert, vorgesehen. Letzterer nimmt z.B. noch den Abrieb von Kohlebürsten oder dergleichen des Antriebsmotors des Gebläses auf. Beide Filterstufen müssen als Verbrauchsmaterial vom Benutzer des Staubsaugers ausgetauscht werden. Einem Benutzer muss dazu zuverlässig und gebrauchsgerecht signalisiert werden, wann der Beutel oder der Abluftfilter in Folge einer erreichten Obergrenze für eine Füllung oder Sättigung gewechselt werden muss. Für den Staubbeutel werden üblicherweise Sensoren verwendet, die nach dem Differenzdruckprinzip arbeiten. Für den Abluftfilter ist bekannt, eine Betriebszeit des Filters als Kriterium für einen erforderlichen Austausch heranzuziehen. Hierzu kommt ein Zeitzähler in Betracht, der nach dem Einlegen des Abluftfilters manuell durch den Benutzer zurückgesetzt wird und der nach Ablauf einer fest vorgegebenen Betriebszeit den notwendigen Wechsel des Filters signalisiert. Der Algorithmus hierfür sowie notwendige Bedien- und Anzeigeelemente sind in einer Staubsaugersteuerung implementiert bzw. Bestandteil der Staubsaugersteuerung.Vacuum cleaners, in particular electric vacuum cleaners in a version as a household vacuum cleaner, work almost exclusively with multi-stage particle filters. So before a vacuum cleaner fan prefilter - preferably designed as a dust bag - and behind an exhaust filter for removing fine dust that still passes the bag are usually provided. The latter takes e.g. nor the abrasion of carbon brushes or the like of the drive motor of the fan. Both filter stages must be replaced as consumables by the user of the vacuum cleaner. A user must be reliably and conveniently signaled when the bag or the exhaust filter must be changed as a result of reaching an upper limit for a filling or saturation. For the dust bag sensors are usually used, which operate on the differential pressure principle. For the exhaust filter is known to use an operating time of the filter as a criterion for a required replacement. For this purpose, a time counter is considered, which is reset manually after inserting the exhaust filter by the user and the expiration of a fixed operating time signals the necessary change of the filter. The algorithm for this and necessary operating and display elements are implemented in a vacuum cleaner control or part of the vacuum cleaner control.

Die DE 102 29 796 beschreibt einen Filter mit einem temperaturabhängig integrierenden Verbrauchsindikator. Die Farbe des Indikators ändert sich temperaturabhängig immer dann, wenn der Staubsauger längere Zeit betrieben wird. Die DE 602 05 753 T2 beschreibt zeitabhängige Verbrauchsindikatoren, die vom Benutzer durch Öffnen eines Flüssigkeitsspeichers aktiviert werden müssen. Eine farbige Indikatorflüssigkeit diffundiert in ein im Verbrauchsindikator befindliches saugfähiges Material, das sich dann zeitabhängig verfärbt und damit einen Maßstab für die Nutzungsdauer darstellt.The DE 102 29 796 describes a filter with a temperature-dependent integrating consumption indicator. The color of the indicator changes depending on the temperature always when the vacuum cleaner is operated for a long time. The DE 602 05 753 T2 describes time-dependent consumption indicators that must be activated by the user by opening a fluid store. A colored indicator liquid diffuses into an absorbent material in the consumption indicator, which then discolors over time and thus represents a measure of the useful life.

Die Betriebszeit als Kriterium für einen erforderlichen Filterwechsel berücksichtigt allerdings nicht oder noch nicht optimal eine tatsächliche Belastungssituation des Filters, weil der reine, lineare Zeitablauf nicht das tatsächliche und über der Zeit variierende Benutzungsverhalten abzubilden vermag.The operating time as a criterion for a required filter change, however, does not take into account or not yet optimally an actual load situation of the filter, because the pure, linear time sequence is not able to represent the actual and over time varying usage behavior.

Eine Aufgabe der vorliegenden Erfindung besteht entsprechend darin, einen Filter, insbesondere einen Staubsaugerabluftfilter, mit Mitteln zur Generierung eines verbrauchs- bzw. sättigungskonformen Filterwechselsignals anzugeben.Accordingly, it is an object of the present invention to specify a filter, in particular a vacuum cleaner exhaust filter, with means for generating a consumption or saturation-compliant filter change signal.

Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Anspruchs 1 gelöst. Dazu ist bei einer Anzeigevorrichtung für einen Filter, insbesondere einen Staubsaugerabluftfilter, ein aufgrund von Wärmeausdehnung betätigbarer, insbesondere mechanisch betätigbarer Filterwechselindikator, vorgesehen. Die sich im Betrieb der Anzeigevorrichtung, also bei einem Filter, der als Staubsaugerabluftfilter fungiert, beim Betrieb des Staubsaugers, ergebende Wärme, insbesondere Abluftwärme, ist ein gutes Maß für eine Nutzungsdauer und -art des Filters, so dass aus einer Wärmeausdehnung ein Verbrauchs- und/oder sättigungskonformes Filterwechselsignal ableitbar ist. Beim Ansatz gemäß der Erfindung ist für eine derartige Ableitung ein aufgrund von Wärmeausdehnung betätigbarer Filterwechselindikator vorgesehen. Bei einem bestimmten Wärmeeintrag, also einer bestimmten Nutzungsdauer oder -art, ergibt sich eine Wärmeausdehnung, die eine Betätigung des Filterwechselindikators nach sich zieht. Der Filterwechselindikator kann z. B. vom Bediener abgelesen werden und fungiert damit als optisches Signal für einen notwendigen Filterwechsel an den Benutzer.This object is achieved with the features of claim 1. For this purpose, in the case of a display device for a filter, in particular a vacuum cleaner exhaust filter, a filter change indicator that can be actuated due to thermal expansion, in particular a mechanically actuatable filter change indicator, is provided. The operation of the display device, that is, a filter that acts as Staubsaugerabluftfilter, during operation of the vacuum cleaner, resulting heat, in particular exhaust heat, is a good measure of a useful life and type of the filter, so that from a thermal expansion of a consumption and / or saturable filter change signal is derivable. In the approach according to the invention is provided for such a derivation operable due to thermal expansion filter change indicator. At a certain heat input, so a certain period of use or type, results in a thermal expansion, which entails an operation of the filter change indicator. The filter change indicator can, for. B. be read by the operator and thus acts as an optical signal for a necessary filter change to the user.

Ein Filter der hier und nachfolgend beschriebenen Art ist insbesondere ein Staubsaugerabluftfilter, also ein Filter, der im Abluftstrom des Sauggebläses eines Elektrostaubsaugers angeordnet ist, der z.B. als Feinstaub- oder Hygienefilter fungiert und mitunter auch als Ausblas- oder Nachfilter bezeichnet wird.A filter of the type described here and hereinafter is, in particular, a vacuum cleaner exhaust filter, that is to say a filter which is arranged in the exhaust air flow of the suction fan of an electric vacuum cleaner, which is e.g. acts as a particulate matter or hygiene filter and is sometimes referred to as a blow-out or post-filter.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. Dabei verwendete Rückbeziehungen weisen auf die weitere Ausbildung des Gegenstands des Hauptanspruchs durch die Merkmale des jeweiligen Unteranspruchs hin. Sie können auch selbständige Erfindungen enthalten, die eine von den Gegenständen der vorhergehenden Ansprüche unabhängige Gestaltung aufweisen und sind nicht als ein Verzicht auf die Erzielung eines selbständigen, gegenständlichen Schutzes für deren Merkmale zu verstehen. Des Weiteren ist im Hinblick auf eine Auslegung der Ansprüche bei einer näheren Konkretisierung eines Merkmals in einem nachgeordneten Anspruch davon auszugehen, dass eine derartige Beschränkung in den jeweils vorangehenden Ansprüchen nicht vorhanden ist.Advantageous embodiments of the invention are the subject of the dependent claims. Relationships used here point to the further development of the subject-matter of the main claim by the features of the respective sub-claim. They may also contain independent inventions having a design independent of the objects of the preceding claims and are not to be understood as a waiver of obtaining independent, objective protection of their characteristics. Furthermore, with a view to an interpretation of the claims in a closer specification of a feature in a subordinate claim, it is to be assumed that such a restriction does not exist in the respective preceding claims.

Bevorzugt umfasst die Anzeigevorrichtung zum Betätigen des Filterwechselindikators aufgrund von Wärmeausdehnung ein Betätigungselement, das ein wärmeausdehnungsfähiges Medium beinhaltet. Das Betätigungselement wird zusammen mit der Anzeigevorrichtung von der zu filternden Luft angeströmt, so dass sich im Betrieb eine Erwärmung ergibt, die zu einer Wärmeausdehnung des in dem Betätigungselement vorhandenen Mediums führt. Diese Wärmeausdehnung wird durch das Betätigungselement in eine mechanische Betätigung des Filterwechselindikators umgesetzt. Ein solches Betätigungselement ist trotz der mechanischen Wirkungsweise einfach und wartungsarm.Preferably, the display device for actuating the filter change indicator due to thermal expansion comprises an actuator that includes a heat-expandable medium. The actuating element is flown together with the display device of the air to be filtered, so that during operation results in a heating, which leads to a thermal expansion of the existing medium in the actuator. This thermal expansion is converted by the actuator into a mechanical actuation of the filter change indicator. Such an actuator is simple and low maintenance despite the mechanical effect.

Bevorzugt umfasst das Betätigungselement einen Betätigungshebel, der mit einer Wärmeausdehnung des Mediums beweglich ist. Der Betätigungshebel ist eine besonders einfache Möglichkeit für einen mechanischen Kontakt zwischen Betätigungselement und Filterwechselindikator, so dass dessen Betätigung durch den Betätigungshebel des Betätigungselements erfolgen kann.Preferably, the actuating element comprises an actuating lever which is movable with thermal expansion of the medium. The actuating lever is a particularly simple way for a mechanical contact between the actuating element and the filter change indicator, so that its actuation can be effected by the actuating lever of the actuating element.

Als wärmeausdehnungsfähiges Medium für das Betätigungselement kommt Wachs in Betracht. Ein solches Medium reagiert in für die geplante Anwendung ausreichender Art und Weise mit einer Wärmeausdehnung auf eine Temperaturerhöhung. Zudem ist ein wärmeausdehnungsfähiges Medium wie Wachs oder dergleichen ausreichend viskos, so dass z. B. für einen mit dem Wachs bei Wärmeausdehnung beweglichen Betätigungshebel keine besonderen Vorkehrungen für dessen Positionierung und Justierung vorzusehen sind.As a heat-expandable medium for the actuator wax comes into consideration. Such a medium reacts sufficiently for the intended application with a thermal expansion to a temperature increase. In addition, a heat-expandable medium such as wax or the like is sufficiently viscous, so that z. B. for a movable with the wax at thermal expansion operating lever no special precautions for its positioning and adjustment are provided.

Als Filterwechselindikator kommt bevorzugt ein Zählwerk oder dergleichen in Betracht. Bei einem Zählwerk als Filterwechselindikator kann dieses jede Betätigung durch das Betätigungselement registrieren und ab einer Anzahl von Betätigungen oberhalb eines vorgegebenen oder vorgebbaren Schwellwerts eine Anzeige liefern, die einen Benutzer auf die Notwendigkeit zum Filterwechsel aufmerksam macht. Dafür kann das Zählwerk eine als Wechselmarkierung fungierende Stellung einnehmen, wobei das Zählwerk so konfiguriert ist, dass sich die Wechselmarkierung nach einer vorgegebenen Anzahl von Betätigungsvorgängen durch das Betätigungselement einstellt. Das Zählwerk kann dabei als aufwärts zählendes oder abwärts zählendes Zählwerk konfiguriert sein. Im Auslieferungszustand der Anzeigevorrichtung oder eines mit einer solchen Anzeigevorrichtung kombinierten Filters ist das Zählwerk auf eine mit dem Filter korrelierte Startkonfiguration eingestellt oder auf eine solche Startkonfiguration einstellbar. Im Betrieb zählt das Zählwerk bei jeder Betätigung durch das Betätigungselement aufwärts oder abwärts, bis das Zählwerk die als Wechselmarkierung fungierende Stellung einnimmt. Die Anzeige der Wechselmarkierung durch das Zählwerk fungiert dann als Signal an den Benutzer für einen erforderlichen Filterwechsel.As a filter change indicator is preferably a counter or the like into consideration. In a counter as a filter change indicator, this can register each actuation by the actuator and provide a display of a number of actuations above a predetermined or predeterminable threshold value, which alerts a user to the need for filter change. For this purpose, the counter can assume a position acting as a change mark, wherein the counter is configured so that the change mark adjusts after a predetermined number of actuation operations by the actuator. The counter can be configured as an up-counting or down-counting counter. In the delivery condition of the display device or a filter combined with such a display device, the counter is set to a start configuration correlated with the filter or can be set to such a start configuration. In operation, the counter counts up or down on each actuation by the actuator until the counter assumes the position acting as a change mark. The indication of the change flag by the counter then acts as a signal to the user for a required filter change.

Die Anzeigevorrichtung der hier und nachfolgend beschriebenen Art kann mit grundsätzlich beliebigen Filtern kombiniert werden, so dass die Erfindung entsprechend auch einen Filter mit einer hier und nachfolgend beschriebenen Anzeigevorrichtung betrifft. Als Filter kommt besonders ein so genannter Staubsaugerabluftfilter in Betracht. Insgesamt betrifft die Erfindung damit auch einen Staubsauger mit einer solchen Anzeigevorrichtung oder einen Staubsauger mit einem mit einer solchen Anzeigevorrichtung kombinierten Filter, insbesondere einem Staubsaugerabluftfilter mit einer auf dem Ansatz gemäß der Erfindung basierenden Anzeigevorrichtung. Wenn der mit der Anzeigevorrichtung kombinierte Filter als Staubsaugerabluftfilter in einem Abluftkanal eines vom Staubsauger umfassten Sauggebläses fungiert, ergibt sich die Wärmeausdehnung für den aufgrund von Wärmeausdehnung betätigbaren Filterwechselindikator im Betrieb des Staubsaugers aufgrund des Abluftstroms des Sauggebläses. Der Abluftstrom des Sauggebläses ist ein gutes Maß für die Betriebsart und die Betriebsdauer des Staubsaugers und damit für die Belastung des Filters, so dass eine Stellung des Filterwechselindikators nach einer Anzahl von Betätigungsvorgängen durch die Betätigungsvorrichtung Auskunft über eine Sättigung des Filters oder eine evtl. bereits erreichte Sättigungsgrenze des Filters gibt.The display device of the type described here and below can be combined with basically any filters, so that the invention accordingly also relates to a filter with a display device described here and below. As filter is especially a so-called vacuum cleaner exhaust filter into consideration. Overall, the invention thus also relates to a vacuum cleaner with such a display device or a vacuum cleaner with a combined with such a display device filter, in particular a vacuum cleaner exhaust filter with a based on the approach of the invention display device. When the filter combined with the display device functions as a vacuum cleaner exhaust filter in an exhaust duct of a vacuum cleaner provided by the vacuum cleaner, thermal expansion for the thermal expansion actuatable filter change indicator results in operation of the vacuum cleaner due to the exhaust air flow of the suction fan. The exhaust air flow of the suction fan is a good measure of the operating mode and the operating time of the vacuum cleaner and thus the load on the filter, so that a position of the filter change indicator after a number of actuation operations by the actuator information about a saturation of the filter or possibly already reached Saturation limit of the filter.

Damit betrifft die Erfindung schließlich auch eine Verwendung eines Filters mit einer Anzeigevorrichtung, wie hier und nachfolgend beschrieben, als Staubsaugerabluftfilter im Abluftstrom eines Sauggebläses eines Elektrostaubsaugers.Thus, the invention finally also relates to a use of a filter with a display device, as described here and below, as a vacuum cleaner exhaust filter in the exhaust air stream of a suction fan of an electric vacuum cleaner.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher erläutert. Einander entsprechende Gegenstände oder Elemente sind in allen Figuren mit den gleichen Bezugszeichen versehen.An embodiment of the invention will be explained in more detail with reference to the drawing. Corresponding objects or elements are provided in all figures with the same reference numerals.

Das oder jedes Ausführungsbeispiel ist nicht als Einschränkung der Erfindung zu verstehen. Vielmehr sind im Rahmen der vorliegenden Offenbarung zahlreiche Abänderungen und Modifikationen möglich, insbesondere solche Varianten, Elemente und Kombinationen und/oder Materialien, die zum Beispiel durch Kombination oder Abwandlung von einzelnen in Verbindung mit den in der allgemeinen Beschreibung, der oder jeder Ausführungsform sowie den Ansprüchen beschriebenen und in den Zeichnungen enthaltenen Merkmalen bzw. Elementen oder Verfahrensschritten für den Fachmann im Hinblick auf die Lösung der Aufgabe entnehmbar sind und durch kombinierbare Merkmale zu einem neuen Gegenstand oder zu neuen Verfahrensschritten oder Verfahrensschrittfolgen führen, auch soweit sie Herstell-, Prüf- und Arbeitsverfahren betreffen.The or each embodiment is not to be understood as limiting the invention. Rather, numerous modifications and variations are possible within the scope of the present disclosure, in particular those variants, elements and combinations and / or materials, for example, by combination or modification of individual in conjunction with those in the general description, the or each embodiment and the claims described and contained in the drawings features or elements or method steps for the skilled in the art with a view to solving the problem and lead by combinable features to a new subject or to new process steps or process steps, even if they manufacturing, testing and working procedures affect.

Es zeigen

Fig. 1
einen an sich bekannten Staubsauger und
Fig. 2
eine Ausführungsform einer Anzeigevorrichtung gemäß der Erfindung in einer mit einem nur teilweise dargestellten Filter wie er z. B. in einem Staubsauger verwendbar ist.
Show it
Fig. 1
a vacuum cleaner known per se and
Fig. 2
an embodiment of a display device according to the invention in a with a partially illustrated filter such as. B. is usable in a vacuum cleaner.

Fig. 1 zeigt einen an sich bekannten Staubsauger 10, der einen Staubraum 12 mit dort anbringbarem Staubbeutel 14 aufweist. In dem Staubbeutel 14 wird über einen Saugschlauch 16 zugeführter Staub 18 gesammelt. Der Staub 18 wiederum wird vom Saugstrom 20 transportiert, den ein Gebläse 22 (Staubsaugergebläse) erzeugt. Der Staubraum 12 wird mittels eines Staubraumdeckels 24 verschlossen. Feinere Bestandteile des Staubs 18, die den Staubbeutel 14 passieren, gelangen über die Abluft oder den Saugstrom 20 des Gebläses 22 in einen Staubsaugerabluftfilter 26. Fig. 1 shows a vacuum cleaner 10 known per se, which has a dust chamber 12 with there attachable dust bag 14. In the dust bag 14 16 supplied dust via a suction hose 16 is collected. The dust 18 in turn is transported by the suction flow 20, the blower 22 (vacuum cleaner fan) generated. The dust chamber 12 is closed by means of a dust chamber cover 24. Finer components of the dust 18 that pass through the dust bag 14, pass through the exhaust air or the suction flow 20 of the blower 22 in a vacuum cleaner exhaust filter 26th

Der Staubsauger 10 umfasst einen Steuerrechner 28, der mit einer am Staubsauger 10 angeordneten Bedien- und Anzeigeeinheit 30 in Wirkverbindung steht. Über die Signale der Bedien- und Anzeigeeinheit 30 wird vom Steuerrechner 28 die Saugleistung des Gebläses 22 und damit eine Menge aufnehmbaren Staubs 18 durch den Staubsauger 10 eingestellt.The vacuum cleaner 10 comprises a control computer 28, which is in operative connection with a vacuum cleaner 10 arranged on the operating and display unit 30. About the signals of the control and display unit 30, the suction power of the fan 22 and thus a quantity of recordable dust 18 is set by the control computer 28 through the vacuum cleaner 10.

Ferner signalisiert bei einzelnen Ausführungsformen bekannter Staubsauger 10 die Bedien-und Anzeigeeinheit 30 einen notwendig werdenden Wechsel des Staubsaugerabluftfilters 26 in Abhängigkeit z. B. von einer vom Steuerrechner 28 ermittelten Betriebszeit des Staubsaugers 10. Bei einem Staubsauger 10 mit einer solchen Funktionalität wird nach erfolgtem Wechsel des Staubsaugerabluftfilters 26 über die Bedien- und Anzeigeeinheit 30 der Betriebszeitzähler zurückgesetzt.Furthermore, signals in individual embodiments of known vacuum cleaner 10, the control and display unit 30 a necessary becoming replacement of the vacuum cleaner exhaust filter 26 depending on z. In a vacuum cleaner 10 with such functionality after the replacement of the vacuum cleaner exhaust filter 26 via the control and display unit 30 of the operating time counter is reset.

Fig. 2 zeigt eine Ausführungsform einer Anzeigevorrichtung 40 in einer mit einem nur teilweise dargestellten Filter 42, z. B. einem Staubsaugerabluftfilter 26 (Fig. 1), kombinierten Konfiguration. Bei dem Filter 42 handelt es sich um einen so genannten HEPA-Filter, der an einer Filtereingangsseite eine Aktivkohleschicht 44 und im Anschluss an diese ein Filtermedium 46 umfasst. Die Anzeigevorrichtung 40 ist so in den Filter 42 integriert, dass diese sich seitlich an das Filtermedium 46 anschließt. Jede andere Position ist für die Anzeigevorrichtung 40 genauso denkbar, z. B. eine allseitig vom Filtermedium 46 umgebene Position. Fig. 2 shows an embodiment of a display device 40 in a with a filter 42 shown only partially, for. B. a vacuum cleaner exhaust filter 26 ( Fig. 1 ), combined configuration. The filter 42 is a so-called HEPA filter which comprises an activated carbon layer 44 on a filter input side and a filter medium 46 following this. The display device 40 is integrated into the filter 42 so that it laterally adjoins the filter medium 46. Any other position is just as conceivable for the display device 40, z. As a surrounded on all sides by the filter medium 46 position.

Die Anzeigevorrichtung 40 umfasst als aufgrund von Wärmeausdehnung betätigbaren Filterwechselindikator 48 ein Zählwerk. Die Betätigung des Filterwechselindikators 48 erfolgt mit einem Betätigungselement 50. Dieses beinhaltet zum Betätigen des Filterwechselindikators 48 aufgrund von Wärmeausdehnung ein wärmeausdehnungsfähiges Medium 52, z. B. Wachs. In dem wärmeausdehnungsfähigen Medium 52, und ansonsten durch ein Gehäuse des Betätigungselements 50, wird ein Betätigungshebel 54 gehalten, der bei entsprechender Wärmeausdehnung des wärmeausdehnungsfähigen Mediums 52 den Filterwechselindikator 48 betätigt. Beim dargestellten Ausführungsbeispiel ist zur Betätigung des Filterwechselindikators 48 ein zu diesem gehöriger und vom Betätigungshebel 54 des Betätigungselements 50 betätigbarer Gegenbetätigungshebel dargestellt.The display device 40 includes a heat exchange actuatable filter change indicator 48 as a counter. The operation of the filter change indicator 48 is carried out with an actuating element 50. This includes for actuating the filter change indicator 48 due to thermal expansion of a heat-expandable medium 52, z. B. wax. In the heat-expandable medium 52, and otherwise by a housing of the actuating element 50, an actuating lever 54 is held, which with appropriate thermal expansion of the heat-expandable medium 52 the Filter change indicator 48 is actuated. In the illustrated embodiment, a corresponding thereto and actuatable by the actuating lever 54 of the actuating element 50 counteracting lever is shown for actuating the filter change indicator 48.

Bei der dargestellten Ausführungsform ist der Filterwechselindikator 48 als Zählwerk gezeigt, und insbesondere handelt es sich um ein mechanisches Zählwerk, das bei jeder Betätigung durch das Betätigungselement 50 einen Zählschritt ausführt. Abweichend von der dargestellten Beschriftung des Zählwerks mit arabischen Ziffern kommt auch eine Verwendung eines Farbcodes oder dergleichen in Betracht, so dass sich z. B. beim Erreichen eines vorgegebenen oder vorgebbaren Zählerstands des Zählwerks an einer als Wechselanzeige 56 fungierenden Sichtseite drei, oder je nach Walzenanzahl des Zählwerks, ein oder mehrere rote Felder befinden, die in Kombination für den Benutzer des Filters 42 ein Filterwechselsignal darstellen.In the illustrated embodiment, the filter change indicator 48 is shown as a counter and, more particularly, it is a mechanical counter that performs a count step upon each actuation by the actuator 50. Notwithstanding the illustrated label of the counter with Arabic numerals is also a use of a color code or the like into consideration, so that z. B. when reaching a predetermined or predetermined counter reading of the counter at a functioning as a change display 56 visible side three, or depending on the number of rollers of the counter, one or more red fields are, which represent a filter change signal for the user of the filter 42 in combination.

Zusammenfassend lässt sich die vorliegende Erfindung damit kurz wie folgt darstellen: Es wird eine Anzeigevorrichtung 40 für einen Filter 42, insbesondere einen Staubsaugerabluftfilter 26, mit einem aufgrund von Wärmeausdehnung betätigbaren Filterwechselindikator 48 angegeben, so dass die Wärmeausdehnung als Maß für die Nutzungsart und -dauer des Filters 42 herangezogen werden kann und mit einer insbesondere mechanischen Betätigung des Filterwechselindikators 48 aufgrund einer solchen Wärmeausdehnung ein vom Benutzer wahrnehmbares Signal, insbesondere in Form eines optischen Hinweises, generiert wird, das Auskunft über einen Sättigungsgrad oder eine evtl. bereits erreichte Sättigungsobergrenze des Filters 42 gibt.In summary, the present invention can thus be described briefly as follows: A display device 40 for a filter 42, in particular a vacuum cleaner exhaust filter 26, with an actuatable due to thermal expansion filter change indicator 48 is given, so that the thermal expansion as a measure of the type of use and duration of Filters 42 can be used and with a particular mechanical actuation of the filter change indicator 48 due to such thermal expansion of a user perceptible signal, in particular in the form of an optical indication generated, the information about a degree of saturation or possibly already reached saturation upper limit of the filter 42 ,

Claims (10)

Anzeigevorrichtung (40) für einen Filter (42), insbesondere einen Staubsaugerabluftfilter (26), mit einem aufgrund von Wärmeausdehnung betätigbaren Filterwechselindikator (48).Display device (40) for a filter (42), in particular a vacuum cleaner exhaust filter (26), with a due to thermal expansion operable filter change indicator (48). Anzeigevorrichtung (40) nach Anspruch 1, mit einem Betätigungselement (50) zum Betätigen des Filterwechselindikators (48) aufgrund von Wärmeausdehnung, wobei das Betätigungselement (50) ein wärmeausdehnungsfähiges Medium (52) beinhaltet.A display device (40) according to claim 1, including an actuator (50) for actuating said filter change indicator (48) due to thermal expansion, said actuator (50) including a heat expansive medium (52). Anzeigevorrichtung (40) nach Anspruch 2, wobei das Betätigungselement (50) einen Betätigungshebel (54) umfasst, der mit einer Wärmeausdehnung des Mediums (52) beweglich ist.A display device (40) according to claim 2, wherein the actuator (50) comprises an actuating lever (54) movable with thermal expansion of the medium (52). Anzeigevorrichtung (40) nach Anspruch 2 oder 3, mit einem Wachs als Medium (52).Display device (40) according to claim 2 or 3, with a wax as medium (52). Anzeigevorrichtung (40) nach einem der vorangehenden Ansprüche, mit einem Zählwerk als Filterwechselindikator (48).Display device (40) according to one of the preceding claims, with a counter as a filter change indicator (48). Anzeigevorrichtung (40) nach einem der Ansprüche 2 bis 4 und Anspruch 5, wobei das Zählwerk eine als Wechselmarkierung fungierende Stellung einnehmen kann und wobei das Zählwerk so konfiguriert ist, dass sich die Wechselmarkierung nach einer vorgegebenen Anzahl von Betätigungsvorgängen durch das Betätigungselement (50) einstellt.A display device (40) as claimed in any one of claims 2 to 4 and claim 5, wherein the counter is operable to act as a change tag and wherein the counter is configured to adjust the change flag after a predetermined number of operations by the actuator (50) , Filter (42) mit einer Anzeigevorrichtung (40) nach einem der vorangehenden Ansprüche.Filter (42) with a display device (40) according to one of the preceding claims. Staubsauger (10) mit einem Filter (42) nach Anspruch 7.Vacuum cleaner (10) with a filter (42) according to claim 7. Staubsauger (10) nach Anspruch 8, wobei der Filter (42) als Staubsaugerabluftfilter (26) in einem Abluftstromkanal eines vom Staubsauger (10) umfassten Sauggebläses fungiert und wobei sich die Wärmeausdehnung für den aufgrund von Wärmeausdehnung betätigbaren Filterwechselindikator (48) sich im Betrieb des Staubsaugers (10) aufgrund des Abluftstroms des Sauggebläses ergibt.A vacuum cleaner (10) according to claim 8, wherein the filter (42) functions as a vacuum cleaner exhaust filter (26) in an exhaust air duct of an aspirator included in the vacuum cleaner (10) and wherein the thermal expansion of the thermal expansion actuatable filter change indicator (48) is in operation Vacuum cleaner (10) due to the exhaust air flow of the suction fan results. Verwendung eines Filters (42) nach Anspruch 7 als Staubsaugerabluftfilter (26) im Abluftstrom eines Sauggebläses eines Elektrostaubsaugers.Use of a filter (42) according to claim 7 as a vacuum cleaner exhaust filter (26) in the exhaust air stream of a suction fan of an electric vacuum cleaner.
EP11401060.6A 2010-05-05 2011-04-13 Display device for a filter, and vacuum cleaner with such a filter as waste air filter Not-in-force EP2384679B1 (en)

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US20110271832A1 (en) 2011-11-10
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EP2384679A3 (en) 2013-09-04
US8647408B2 (en) 2014-02-11

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