EP2979602A1 - Back-flushable air filter - Google Patents

Back-flushable air filter Download PDF

Info

Publication number
EP2979602A1
EP2979602A1 EP15177489.0A EP15177489A EP2979602A1 EP 2979602 A1 EP2979602 A1 EP 2979602A1 EP 15177489 A EP15177489 A EP 15177489A EP 2979602 A1 EP2979602 A1 EP 2979602A1
Authority
EP
European Patent Office
Prior art keywords
air
filter
clean
backwashable
valve element
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.)
Granted
Application number
EP15177489.0A
Other languages
German (de)
French (fr)
Other versions
EP2979602B1 (en
Inventor
Miron SERNECKI
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.)
Vorwerk and Co Interholding GmbH
Original Assignee
Vorwerk and Co Interholding GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vorwerk and Co Interholding GmbH filed Critical Vorwerk and Co Interholding GmbH
Publication of EP2979602A1 publication Critical patent/EP2979602A1/en
Application granted granted Critical
Publication of EP2979602B1 publication Critical patent/EP2979602B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • A47L9/20—Means for cleaning filters

Definitions

  • the invention relates to a backwashable air filter, in particular for a vacuum cleaner, with a dust air space from a clean air space separating filter element which is traversed in a filter operation of air to be cleaned from the direction of the dust air space in the direction of the clean air space, the clean air space is associated with a clean air outlet.
  • Backwashable air filters of the aforementioned type are known in the art. These are commonly used to clean dust and / or dirt-laden air. In the context of vacuum cleaners, these are used to protect the blower of the vacuum cleaner from occupying with absorbed dust / dirt. Due to the suction operation of the vacuum cleaner, there is regularly a progressive occupancy of the filter element with dust. The filter element contaminates with increasing operating time, so that at regular intervals a backwashing of the air filter is required.
  • the publication DE 195 17197 A1 describes, for example, a backwashable air filter for a vacuum cleaner, which has a cleaning nozzle arranged in the filter element, which is flowed through for the purpose of cleaning by means of a compressor of the vacuum cleaner against the usual flow direction for a filter operation.
  • the compressor has two valve blocks, with the help of the flow direction of filter operation is switched to backwash.
  • the valve blocks are to be switched manually.
  • a disadvantage of the above-mentioned air filters is that they only work in combination with devices with respect to a backwash, which a Have compressor with corresponding valve blocks for switching the flow direction.
  • the invention proposes a backwashable air filter according to the preamble of the main claim, the Reinluftauslass Symposium has a valve element which is formed in a backwash due to the opening of a Mau Kunststoffeinlassweges, which is downstream of the clean air outlet in the flow direction for a filter operation, a Allow backwashing of the filter element with ambient air.
  • the air filter is designed so that it can be backwashed regardless of the type and design of the device in which it is used.
  • the ambient air required for the backwash operation is drawn into the air filter through the secondary air inlet path, so that it is not necessary to provide a compressor with corresponding valve blocks for switching the flow direction from the clean air outlet area in the direction of the dust air space.
  • valve element close the clean air outlet region by means of a stream of air flowing in a backwash operation from the clean air space in the direction of the dust air space and at least one Releasing the secondary air inlet path, which connects the clean air space with the ambient air surrounding the air filter.
  • the air filter has a valve element which opens and closes depending on the direction of the air flow flowing through the air filter and thereby enables either the filter operation or the backwash operation.
  • the switching of the air filter from a filter operation to a backwash operation or vice versa is effected by the flow direction of the air flow flowing through the air filter itself.
  • the air filter is connected from the direction of the dust air space to a suction fan.
  • a suction fan for example the suction fan of a second vacuum cleaner.
  • the inventive design and arrangement of the valve element prevents the resulting during the suction of the air filter on the dust air space side suction air flow back to the non-operating suction fan of the backwashable air filter having device.
  • the suction fan is fluidly separated from the air filter, so that the suction fan can not be set in rotation and thus damage to the electronics is excluded.
  • the valve element according to the invention simultaneously fulfills two different functions, namely on the one hand the closing of the clean air outlet to avoid co-rotation of the suction fan, and on the other hand, the release of a Finelufteinlassweges between the clean air space and the environment of the filter element, so that Ambient air, which is needed to clean the air filter, can be sucked into the clean air space.
  • valve element is displaceably arranged on the clean air outlet region, in particular in the clean air outlet region.
  • valve element is arranged on or in the clean air outlet region, that this is displaced as a result of the air flow flowing from the clean air space in the direction of the dust-laden air space.
  • the valve element may be adapted to the shape of the clean air outlet area with respect to its geometric shape. If the clean air outlet region is, for example, cylindrical, the valve element may advantageously also be a cylindrical element which is displaceable coaxially within the clean air outlet region.
  • valve element and the clean air outlet region have mutually corresponding secondary air inlet openings which can be arranged relative to one another by displacement of the valve element relative to the clean air outlet region such that a secondary air inlet path is released.
  • the valve element can thus be displaced relative to the clean air outlet region so that secondary air inlet openings formed correspondingly in the valve element and the clean air outlet region lie next to one another, so that ambient air can enter the clean air chamber.
  • the valve element and the clean air outlet region are, for example, cylindrical elements
  • the valve element can be displaced coaxially with the clean air outlet region until the secondary air inlet openings lie next to each other in the radial direction and thus release a secondary air inlet path for the ambient air.
  • Both the valve element and the clean air outlet area may have a plurality of secondary air inlet openings or even each have a secondary air inlet opening.
  • the valve element has a check valve, which is arranged and designed such that it closes the clean air outlet region during a flow through the air filter by means of an air flow flowing from the clean air space in the direction of the dust air space.
  • the valve element closes the clean air outlet automatically when the clean air space is flowed through contrary to the usual flow direction for a filter operation.
  • the clean air outlet area is closed at a certain suction force of the air flow flowing in the direction of the dust air space, so that the air flow can not react on the suction fan.
  • the check valve has at least one pivotable non-return valve.
  • two symmetrical non-return flaps may be arranged within the clean air outlet area, which as a result of the reversal of the flow direction upon a change from a filter operation to a backwash operation in the direction of the clean air space, i. in the opening cross-section of the clean air outlet, are pivoted, which closes the Reinluftauslass Symposium.
  • valve member is connected by means of a return element, in particular a spring, with the clean air outlet that the valve element is displaced against the restoring force of the return element and in release of a Fine Kunststoffeinlassweges in the direction of the dust-laden air in closed during a graphairesiere Industriesauslass Symposium.
  • a return element in particular a spring
  • This particularly advantageous embodiment is the Valve element shifted with closed check valve in the direction of the dust air.
  • the suction force of the force acting on the valve element air flow is used, which acts on the check valve, eg.
  • the return element With the aid of the return element arranged between the clean air outlet area and the valve element, it is ensured that a predefined pressure within the clean air outlet area is reached or undershot before the valve element is displaced and thus ambient air can pass through the secondary air inlet path into the clean air space. If the pressure is sufficient to open the secondary air inlet, an equilibrium is advantageously established between the amount of ambient air flowing into the clean air space and the amount of air extracted by means of the external suction fan from the backwashable air filter.
  • the restoring element may advantageously be a spring, but other restoring elements which fulfill the same purpose are also conceivable.
  • the backwashable air filter is vented again and the valve element is moved by the restoring force of the return element back to its original position, at the same time the Maulufteinlassweg is closed again.
  • the check valve arranged in the clean air outlet area is also opened again at the same time, for example, the pivotable non-return flaps are again pivoted into an open position.
  • valve element and a cleaning nozzle are arranged in the backwashing of the air filter to each other so that ambient air sucked in by the Maulufteinlassweg is forced into the cleaning nozzle.
  • the valve element can be displaced within the clean air outlet region in such a way that it directly contacts the cleaning nozzle in a backwash position so that the air sucked through the secondary air inlet path can flow exclusively into the cleaning nozzle and thus clean the filter element.
  • the valve element and the cleaning nozzle bear against a common contact part, whereby a flow path into the cleaning nozzle is predetermined.
  • the cleaning nozzle is a rotary air nozzle rotatably mounted in the clean air space.
  • the cleaning nozzle has at least one pointing in the direction of the filter element nozzle opening, which is arranged and formed so that the outflowing air, the cleaning nozzle set in rotation and thus cleaning of the inner surface of the filter element over the entire circumference can be performed.
  • the cleaning nozzle is a stationary nozzle, which has such a plurality of nozzle openings, that thus also a cleaning comprising the entire peripheral surface is possible.
  • the invention also proposes a vacuum cleaner which has a backwashable air filter of the aforementioned type.
  • the inventive design of the backwashable air filter can be cleaned by the suction mouth of the vacuum cleaner is brought, for example, in contact with a suction mouth of a second vacuum cleaner.
  • the suction of the backwashable air filter then takes place immediately after switching on the second vacuum cleaner, wherein the dust collected in the filter element of the vacuum cleaner according to the invention is sucked into the second vacuum cleaner.
  • a method for operating a backwashable air filter in particular a backwashable air filter of the aforementioned type, proposed, wherein the backwashable air filter for a backwash is fluidly connected to a suction opening of the air filter opposite to a flow direction for a filter operation acting suction fan wherein a valve element associated with a clean air outlet region of the air filter closes the clean air outlet region by means of an air flow flowing from a clean air space in the direction of dust air space and releases at least one secondary air inlet path for the admission of ambient air into the clean air space.
  • the back-flushable air filter 2 has a cylindrical filter element 3, in which coaxially a likewise cylindrical cleaning nozzle 6 with nozzle openings 7 for backwashing the filter element 3 during a backwash operation is arranged.
  • the air filter 2 has a valve element 9 with check valves 13, which are open in the illustrated filter operation, so that the filtered air reaches a suction fan 16 of the vacuum cleaner 1.
  • FIG. 2 shows the in FIG. 1 shown air filter 2 with closed check valves 13th
  • FIG. 3 shows the in FIG. 1 illustrated air filter 2 during a backwash operation.
  • the check valves 13 are closed, wherein the valve element 9 is displaced in the direction of the cleaning nozzle 6, so that secondary air inlet openings 11 are released, through which ambient air can be drawn into the air filter 2 for cleaning the filter element 3.
  • Fig. 4 shows a detailed schematic diagram of in FIG. 1 illustrated backwashable air filter 2 in a filter operation.
  • the backwashable air filter 2 has the filter element 3, which, for example, a material with filter properties, for example.
  • a nonwoven includes.
  • the filter element 3 separates a clean air space 4 of the backwashable air filter 2 from a dust air space 8.
  • the clean air space 4 is that portion of the air filter 2, which lies in the flow direction of the dust-laden air in front of the filter element 3.
  • the dust-air chamber 8 is that region of the air filter 2 which lies behind the filter element 3 in the flow direction of the air which is exposed to dust.
  • the cleaning nozzle 6 is arranged with the nozzle openings 7. The cleaning nozzle 6 is not flowed through during the filtering operation of the air filter 2.
  • the clean air space 4 is assigned a clean air outlet area 5, by means of which the air cleaned by means of the filter element 3 can reach a suction blower 16 of the vacuum cleaner 1.
  • the suction fan 16 is not part of the air filter 2.
  • the valve element 9 is arranged, which is designed to close the clean air outlet 5 for a backwash operation of the air filter 2 and at least one clean air chamber 4 with release the secondary air inlet path 10 connecting the ambient air.
  • the valve element 9 has the secondary air inlet opening 11, which corresponds to a secondary air inlet opening 11 of the clean air outlet area 5.
  • the valve element 9 also has a check valve 12, which has the two check valves 13 in the present example.
  • a return element 14, here a spring is arranged between the valve element 9 and the clean air outlet region 5, a return element 14, here a spring, is arranged.
  • Fig. 5 shows the cleaning nozzle 6, which can be used to clean the filter element 3 coaxially into the clean air space 4 of the air filter 2.
  • the cleaning nozzle 6 has, for example, two nozzle openings 7 which extend in slot-like fashion in the axial direction of the cleaning nozzle 6.
  • the nozzle openings 7 have an air outlet direction, which with respect to the radial direction of the cleaning nozzle 6 substantially at an angle not equal to 0 °, so that the cleaning nozzle 6 is set in rotation with air in rotation.
  • Fig. 6 shows the backwashable air filter 2 according to Fig. 4 with closed check valves 13 (analog Fig. 2 ).
  • This position takes the air filter 2 in a change from a filter operation in a backwash one.
  • the air filter 2 is acted upon via the suction opening 15 by a suction fan, for example the suction fan of a second vacuum cleaner, with negative pressure, so that the arranged in the clean air outlet 5 check valve 12 closes.
  • the two non-return valves 13 of the check valve 12 are pivoted into the clean air outlet region 5, so that the clean air outlet region 5 is fluidly separated from the suction fan 16 of the vacuum cleaner 1.
  • the suction fan of the same vacuum cleaner can also be used by switching it to the suction opening 15 of the air filter 2.
  • Fig. 7 shows the in the FIGS. 4 and 6 illustrated back-flushable air filter 2 during the backwash operation (analog Fig. 3 ).
  • the check valve 12 is closed, wherein the suction air flow of the external suction blower seeks to pull the check valves 13 in the direction of the dust-laden air space 8.
  • it becomes movable at the clean air outlet portion 5 arranged valve element 9 is pulled in the direction of the cleaning nozzle 6, wherein the valve element 9 moves against the restoring force of the return element 14.
  • the secondary air inlet openings 11 formed inside the clean air outlet area 5 and the valve element 9 come next to each other with respect to a radial direction of the air filter 2, so that an air inlet path 10 is released.
  • the air filter 2 is, as exemplified in Fig. 1 shown integrated into a vacuum cleaner 1.
  • the air filter 2 is thereby installed in the vacuum cleaner 1 that it is disposed within the Saugluftweg, that is, between a suction mouth of the congestion suction device 1 and the suction fan 16 of the vacuum cleaner 1.
  • the air filter 2 is thereby cleaned, ie backwashed, by connecting a second vacuum cleaner to the suction mouth of the first vacuum cleaner 1.
  • the backwashable air filter 2 is in the in the Fig. 1 and 4 illustrated filter operation.
  • air is sucked through the suction opening 15 of the air filter 2 by means of the suction fan 16 of the vacuum cleaner 1.
  • the sucked air passes through the dust air chamber 8 of the air filter 2 to the filter element 3.
  • the air to be filtered flows through the filter element 3, wherein the dust contained in the air is filtered.
  • the filtered air then flows within the clean air space 4 past the (not in operation) cleaning nozzle 6, without enforcing them.
  • the filtered air passes from the clean air space 4 into the clean air outlet area 5 and to the suction fan 16.
  • the clean air outlet area 5 is opened in order to clear the path to the suction fan 16.
  • the valve element 9 is in an opening position, wherein the two check valves 13 on the inner wall of the clean air outlet region 5, so that a maximum flow cross section of the clean air outlet region 5 is available.
  • the suction mouth of the vacuum cleaner 1 and thus also the suction opening 15 of the air filter 2 is fluidically connected to a suction fan, such as a suction fan of a second vacuum cleaner, which acts on the suction port 15 with negative pressure.
  • a suction fan such as a suction fan of a second vacuum cleaner
  • the resulting suction air flow in the direction of the suction opening 15 acts on the check valves 13 of the check valve 12, so that they are pivoted into the clean air outlet region 5 and close the clean air outlet region 5. This situation is in Fig. 6 shown.
  • the sucked air passes from the Finelufteinlassweg 10 through the cleaning nozzle 6, the filter element 3 and finally the suction opening 15 to the suction fan.
  • the nozzle openings 7 of the cleaning nozzle 6 are not radially aligned, but rather are at a certain angle not equal to 0 °, the cleaning nozzle 6 rotates due to a flow of air.
  • the nozzle openings 7 rotate past the inner wall of the filter element 3, so that the filter element 3 can be cleaned over the entire circumference.
  • the dust contained in the filter element 3 is released from the filter element 3 and passes through the dust air space 8 to the suction opening 15th
  • the thus cleaned air filter 2 can now be used again for a filter operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Die Erfindung betrifft einen rückspülbaren Luftfilter (2), insbesondere für einen Staubsauger, mit einem einen Staubluftraum (8) von einem Reinluftraum (4) trennenden Filterelement (3), welches in einem Filterbetrieb von zu reinigender Luft aus Richtung des Staubluftraumes (8) in Richtung des Reinluftraumes (4) durchströmt wird, wobei dem Reinluftraum (4) ein Reinluftauslassbereich (5) zugeordnet ist. Um einen rückspülbaren Luftfilter zu schaffen, welcher unabhängig von einer besonderen Ausbildung des Gerätes, in welches er eingesetzt ist, rückspülbar ist und dadurch mit einer Vielzahl von Geräten kompatibel ist, wird vorgeschlagen, dass der Reinluftauslassbereich (5) ein Ventilelement (9) aufweist, welches ausgebildet ist, in einem Rückspülbetrieb infolge der Öffnung eines Nebenlufteinlassweges (10), welcher in Strömungsrichtung für einen Filterbetrieb dem Reinluftauslassbereich (5) nachgeordnet ist, eine Rückspülung des Filterelementes (3) mit Umgebungsluft zu ermöglichen. Außerdem betrifft die Erfindung ein Verfahren zum Betrieb eines rückspülbaren Luftfilters (2).The invention relates to a backwashable air filter (2), in particular for a vacuum cleaner, with a filter element (3) separating a dust air space (8) from a clean air space (4), which in a filter operation of air to be cleaned from the direction of dust air space (8) Direction of the clean air space (4) is flowed through, wherein the clean air space (4) is associated with a clean air outlet region (5). In order to provide a backwashable air filter, which is backwashable regardless of a particular design of the device in which it is used and is thus compatible with a variety of devices, it is proposed that the clean air outlet region (5) has a valve element (9), which is designed, in a backwashing operation as a result of the opening of a secondary air inlet path (10), which is downstream of the clean air outlet region (5) in the flow direction for filter operation, to allow backwashing of the filter element (3) with ambient air. In addition, the invention relates to a method for operating a backwashable air filter (2).

Description

Die Erfindung betrifft einen rückspülbaren Luftfilter, insbesondere für einen Staubsauger, mit einem einen Staubluftraum von einem Reinluftraum trennenden Filterelement, welches in einem Filterbetrieb von zu reinigender Luft aus Richtung des Staubluftraumes in Richtung des Reinluftraumes durchströmt wird, wobei dem Reinluftraum ein Reinluftauslassbereich zugeordnet ist.The invention relates to a backwashable air filter, in particular for a vacuum cleaner, with a dust air space from a clean air space separating filter element which is traversed in a filter operation of air to be cleaned from the direction of the dust air space in the direction of the clean air space, the clean air space is associated with a clean air outlet.

Rückspülbare Luftfilter der vorgenannten Art sind im Stand der Technik bekannt. Diese werden üblicherweise verwendet, um mit Staub und/oder Schmutz belastete Luft zu reinigen. Im Zusammenhang mit Staubsaugern werden diese verwendet, um das Gebläse des Staubsaugers vor einer Belegung mit aufgesaugtem Staub/Schmutz zu schützen. Durch den Saugbetrieb des Staubsaugers kommt es regelmäßig zu einer fortschreitenden Belegung des Filterelementes mit Staub. Das Filterelement verschmutzt mit zunehmender Betriebsdauer, so dass in regelmäßigen Abständen ein Rückspülen des Luftfilters erforderlich ist.Backwashable air filters of the aforementioned type are known in the art. These are commonly used to clean dust and / or dirt-laden air. In the context of vacuum cleaners, these are used to protect the blower of the vacuum cleaner from occupying with absorbed dust / dirt. Due to the suction operation of the vacuum cleaner, there is regularly a progressive occupancy of the filter element with dust. The filter element contaminates with increasing operating time, so that at regular intervals a backwashing of the air filter is required.

Die Druckschrift DE 195 17197 A1 beschreibt bspw. einen rückspülbaren Luftfilter für einen Staubsauger, welcher eine in dem Filterelement angeordnete Reinigungsdüse aufweist, die zum Zwecke der Reinigung mittels eines Verdichters des Staubsaugers entgegen der für einen Filterbetrieb üblichen Strömungsrichtung durchströmt wird. Der Verdichter weist zwei Ventilblöcke auf, mit deren Hilfe die Strömungsrichtung von Filterbetrieb auf Rückspülbetrieb umstellbar ist. Die Ventilblöcke sind manuell umzuschalten.The publication DE 195 17197 A1 describes, for example, a backwashable air filter for a vacuum cleaner, which has a cleaning nozzle arranged in the filter element, which is flowed through for the purpose of cleaning by means of a compressor of the vacuum cleaner against the usual flow direction for a filter operation. The compressor has two valve blocks, with the help of the flow direction of filter operation is switched to backwash. The valve blocks are to be switched manually.

Nachteilig bei den vorgenannten Luftfiltern ist, dass diese in Bezug auf einen Rückspülbetrieb nur in Kombination mit Geräten funktionieren, welche einen Verdichter mit entsprechenden Ventilblöcken zur Umschaltung der Strömungsrichtung aufweisen.A disadvantage of the above-mentioned air filters is that they only work in combination with devices with respect to a backwash, which a Have compressor with corresponding valve blocks for switching the flow direction.

Es ist daher Aufgabe der Erfindung, einen rückspülbaren Luftfilter zu schaffen, welcher unabhängig von einer besonderen Ausbildung des Gerätes, in welches er eingesetzt ist, rückspülbar ist und dadurch mit einer Vielzahl von Geräten kompatibel ist.It is therefore an object of the invention to provide a backwashable air filter, which is backwashable regardless of a particular design of the device in which it is used and is thus compatible with a variety of devices.

Zur Lösung der vorgenanten Aufgabe wird mit der Erfindung ein rückspülbarer Luftfilter nach dem Oberbegriff des Hauptanspruchs vorgeschlagen, dessen Reinluftauslassbereich ein Ventilelement aufweist, welches ausgebildet ist, in einem Rückspülbetrieb infolge der Öffnung eines Nebenlufteinlassweges, welcher in Strömungsrichtung für einen Filterbetrieb dem Reinluftauslassbereich nachgeordnet ist, eine Rückspülung des Filterelementes mit Umgebungsluft zu ermöglichen.To achieve the above-mentioned object, the invention proposes a backwashable air filter according to the preamble of the main claim, the Reinluftauslassbereich has a valve element which is formed in a backwash due to the opening of a Nebenlufteinlassweges, which is downstream of the clean air outlet in the flow direction for a filter operation, a Allow backwashing of the filter element with ambient air.

Durch diese erfindungsgemäße Ausgestaltung ist der Luftfilter so ausgebildet, dass er unabhängig von der Art und Ausgestaltung des Gerätes, in welches er eingesetzt ist, rückgespült werden kann. Die für den Rückspülbetrieb benötigte Umgebungsluft wird durch den Nebenlufteinlassweg in den Luftfilter gesaugt, so dass es nicht notwendig ist, einen Verdichter mit entsprechenden Ventilblöcken zur Umschaltung der Strömungsrichtung von dem Reinluftauslassbereich in Richtung des Staubluftraumes vorzusehen.By this embodiment of the invention, the air filter is designed so that it can be backwashed regardless of the type and design of the device in which it is used. The ambient air required for the backwash operation is drawn into the air filter through the secondary air inlet path, so that it is not necessary to provide a compressor with corresponding valve blocks for switching the flow direction from the clean air outlet area in the direction of the dust air space.

Es wird vorgeschlagen, dass das Ventilelement den Reinluftauslassbereich mittels eines in einem Rückspülbetrieb von dem Reinluftraum in Richtung des Staubluftraumes strömenden Luftstroms zu verschließen und mindestens einen Nebenlufteinlassweg freizugeben, welcher den Reinluftraum mit der den Luftfilter umgebenden Umgebungsluft verbindet.It is proposed that the valve element close the clean air outlet region by means of a stream of air flowing in a backwash operation from the clean air space in the direction of the dust air space and at least one Releasing the secondary air inlet path, which connects the clean air space with the ambient air surrounding the air filter.

Der Luftfilter weist gemäß dieser Ausgestaltung ein Ventilelement auf, welches abhängig von der Richtung des den Luftfilter durchströmenden Luftstroms öffnet und schließt und dadurch entweder den Filterbetrieb oder den Rückspülbetrieb ermöglicht.According to this embodiment, the air filter has a valve element which opens and closes depending on the direction of the air flow flowing through the air filter and thereby enables either the filter operation or the backwash operation.

Die Schaltung des Luftfilters von einem Filterbetrieb zu einem Rückspülbetrieb oder umgekehrt erfolgt durch die Strömungsrichtung des den Luftfilter durchströmenden Luftstroms selbst. Um den Rückspülbetrieb zu initiieren wird der Luftfilter aus der Richtung des Staubluftraumes an ein Sauggebläse angeschlossen. Dies erfolgt beispielsweise dadurch, dass das Gerät, in welches der Luftfilter eingesetzt ist, zum Beispiel ein Staubsauger, an ein Sauggebläse, beispielsweise das Sauggebläse eines zweiten Staubsaugers, angeschlossen wird. Durch die erfindungsgemäße Ausbildung und Anordnung des Ventilelementes wird verhindert, dass der beim Absaugen des Luftfilters über die Staubluftraumseite entstehende Saugluftstrom auf das nicht in Betrieb befindliche Sauggebläse des den rückspülbaren Luftfilter aufweisenden Gerätes zurückwirkt. Mit Hilfe des erfindungsgemäßen Ventilelementes wird das Sauggebläse strömungstechnisch von dem Luftfilter getrennt, so dass das Sauggebläse nicht in Rotation versetzt werden kann und somit eine Schädigung der Elektronik ausgeschlossen ist. Besonders vorteilhaft ist dabei, dass das erfindungsgemäße Ventilelement gleichzeitig zwei verschiedene Funktionen erfüllt, nämlich zum einen das Verschließen des Reinluftauslassbereiches, um ein Mitdrehen des Sauggebläses zu vermeiden, und zum anderen das Freigeben eines Nebenlufteinlassweges zwischen dem Reinluftraum und der Umgebung des Filterelementes, so dass Umgebungsluft, welche zur Reinigung des Luftfilters benötigt wird, in den Reinluftraum eingesaugt werden kann.The switching of the air filter from a filter operation to a backwash operation or vice versa is effected by the flow direction of the air flow flowing through the air filter itself. To initiate the backwash operation, the air filter is connected from the direction of the dust air space to a suction fan. This is done, for example, in that the device in which the air filter is used, for example a vacuum cleaner, is connected to a suction fan, for example the suction fan of a second vacuum cleaner. The inventive design and arrangement of the valve element prevents the resulting during the suction of the air filter on the dust air space side suction air flow back to the non-operating suction fan of the backwashable air filter having device. With the aid of the valve element according to the invention, the suction fan is fluidly separated from the air filter, so that the suction fan can not be set in rotation and thus damage to the electronics is excluded. It is particularly advantageous that the valve element according to the invention simultaneously fulfills two different functions, namely on the one hand the closing of the clean air outlet to avoid co-rotation of the suction fan, and on the other hand, the release of a Nebenlufteinlassweges between the clean air space and the environment of the filter element, so that Ambient air, which is needed to clean the air filter, can be sucked into the clean air space.

Es wird vorgeschlagen, dass das Ventilelement verschiebbar an dem Reinluftauslassbereich, insbesondere in dem Reinluftauslassbereich, angeordnet ist. Dabei empfiehlt es sich insbesondere, dass das Ventilelement so an bzw. in dem Reinluftauslassbereich angeordnet ist, dass dieses infolge des von dem Reinluftraum in Richtung des Staubluftraumes strömenden Luftstroms verschoben wird. Das Ventilelement kann bezüglich seiner geometrischen Form an die Form des Reinluftauslassbereiches angepasst sein. Sofern der Reinluftauslassbereich bspw. zylinderförmig ausgebildet ist, kann das Ventilelement vorteilhaft ein ebenfalls zylinderförmiges Element sein, welches koaxial innerhalb des Reinluftauslassbereiches verschiebbar ist.It is proposed that the valve element is displaceably arranged on the clean air outlet region, in particular in the clean air outlet region. In this case, it is particularly recommended that the valve element is arranged on or in the clean air outlet region, that this is displaced as a result of the air flow flowing from the clean air space in the direction of the dust-laden air space. The valve element may be adapted to the shape of the clean air outlet area with respect to its geometric shape. If the clean air outlet region is, for example, cylindrical, the valve element may advantageously also be a cylindrical element which is displaceable coaxially within the clean air outlet region.

Es empfiehlt sich, dass das Ventilelement und der Reinluftauslassbereich zueinander korrespondierende Nebenlufteinlassöffnungen aufweisen, welche durch eine Verschiebung des Ventilelementes relativ zu dem Reinluftauslassbereich so zueinander anordenbar sind, dass ein Nebenlufteinlassweg freigegeben ist. Das Ventilelement kann somit relativ zu dem Reinluftauslassbereich so verschoben werden, dass korrespondierend in dem Ventilelement und dem Reinluftauslassbereich ausgebildete Nebenlufteinlassöffnungen nebeneinander liegen, so dass Umgebungsluft in den Reinluftraum gelangen kann. In dem Fall dass es sich bei dem Ventilelement und dem Reinluftauslassbereich bspw. um zylinderförmige Elemente handelt, kann das Ventilelement koaxial zu dem Reinluftauslassbereich verschoben werden bis die Nebenlufteinlassöffnungen in radialer Richtung nebeneinander liegen und somit einen Nebenlufteinlassweg für die Umgebungsluft freigeben. Sowohl das Ventilelement als auch der Reinluftauslassbereich können mehrere Nebenlufteinlassöffnungen oder auch nur je eine Nebenlufteinlassöffnung aufweisen.It is recommended that the valve element and the clean air outlet region have mutually corresponding secondary air inlet openings which can be arranged relative to one another by displacement of the valve element relative to the clean air outlet region such that a secondary air inlet path is released. The valve element can thus be displaced relative to the clean air outlet region so that secondary air inlet openings formed correspondingly in the valve element and the clean air outlet region lie next to one another, so that ambient air can enter the clean air chamber. In the event that the valve element and the clean air outlet region are, for example, cylindrical elements, the valve element can be displaced coaxially with the clean air outlet region until the secondary air inlet openings lie next to each other in the radial direction and thus release a secondary air inlet path for the ambient air. Both the valve element and the clean air outlet area may have a plurality of secondary air inlet openings or even each have a secondary air inlet opening.

Bevorzugt weist das Ventilelement ein Rückschlagventil auf, welches so angeordnet und ausgebildet ist, dass dieses den Reinluftauslassbereich bei einer Durchströmung des Luftfilters mittels eines von dem Reinluftraum in Richtung des Staubluftraumes strömenden Luftstroms verschließt. Insofern verschließt das Ventilelement den Reinluftauslassbereich automatisch, wenn der Reinluftraum entgegen der für einen Filterbetrieb üblichen Strömungsrichtung durchströmt wird. In Abhängigkeit von den Eigenschaften des Rückschlagventils wird der Reinluftauslassbereich bei einer bestimmten Saugkraft des in Richtung des Staubluftraumes strömenden Luftstroms verschlossen, so dass der Luftstrom nicht auf das Sauggebläse zurückwirken kann.Preferably, the valve element has a check valve, which is arranged and designed such that it closes the clean air outlet region during a flow through the air filter by means of an air flow flowing from the clean air space in the direction of the dust air space. In this respect, the valve element closes the clean air outlet automatically when the clean air space is flowed through contrary to the usual flow direction for a filter operation. Depending on the characteristics of the check valve, the clean air outlet area is closed at a certain suction force of the air flow flowing in the direction of the dust air space, so that the air flow can not react on the suction fan.

Es empfiehlt sich insbesondere, dass das Rückschlagventil mindestens eine schwenkbare Rückschlagklappe aufweist. In diesem Sinne können innerhalb des Reinluftauslassbereiches beispielsweise zwei symmetrische Rückschlagklappen angeordnet sein, welche in Folge der Umkehr der Strömungsrichtung bei einem Wechsel von einem Filterbetrieb zu einem Rückspülbetrieb in Richtung des Reinluftraumes, d.h. in den Öffnungsquerschnitt des Reinluftauslassbereiches, geschwenkt werden, wodurch sich der Reinluftauslassbereich schließt.It is particularly recommended that the check valve has at least one pivotable non-return valve. In this sense, for example, two symmetrical non-return flaps may be arranged within the clean air outlet area, which as a result of the reversal of the flow direction upon a change from a filter operation to a backwash operation in the direction of the clean air space, i. in the opening cross-section of the clean air outlet, are pivoted, which closes the Reinluftauslassbereich.

Es ist weiterhin vorgesehen, dass das Ventilelement mittels eines Rückstellelementes, insbesondere einer Feder, so mit dem Reinluftauslassbereich verbunden ist, dass das Ventilelement bei während eines Rückspülbetriebs verschlossenem Reinluftauslassbereich entgegen der Rückstellkraft des Rückstellelementes und unter Freigabe eines Nebenlufteinlassweges in Richtung des Staubluftraumes verschoben ist. Durch diese besonders vorteilhafte Ausgestaltung wird das Ventilelement bei geschlossenem Rückschlagventil in Richtung des Staubluftraumes verschoben. Dabei wird die Saugkraft des auf das Ventilelement wirkenden Luftstroms genutzt, welche an dem Rückschlagventil, bspw. den schwenkbaren Rückschlagklappen angreift und diese in Richtung des Staubluftraumes zu ziehen sucht, wobei gleichermaßen das gesamte Ventilelement in Richtung des Staubluftraumes verschoben wird. Mit Hilfe des zwischen Reinluftauslassbereich und Ventilelement angeordneten Rückstellelementes wird sichergestellt, dass ein vordefinierter Druck innerhalb des Reinluftauslassbereiches erreicht ist bzw. unterschritten wird, bevor das Ventilelement verschoben wird und somit Umgebungsluft durch den Nebenlufteinlassweg in den Reinluftraum gelangen kann. Sofern der Druck ausreicht, um den Nebenlufteinlassweg zu öffnen, stellt sich vorteilhaft ein Gleichgewicht zwischen der in den Reinluftraum einströmenden Umgebungsluftmenge und der mittels des externen Sauggebläses aus dem rückspülbaren Luftfilter abgesaugten Luftmenge ein. Das Rückstellelement kann vorteilhaft eine Feder sein, jedoch sind auch andere Rückstellelemente, welche den gleichen Zweck erfüllen, denkbar. Sofern das externe Sauggebläse abgeschaltet wird, wird der rückspülbare Luftfilter wieder belüftet und das Ventilelement durch die Rückstellkraft des Rückstellelementes wieder in seine Ausgangsstellung verschoben, wobei gleichzeitig auch der Nebenlufteinlassweg wieder geschlossen wird. In Folge der Belüftung wird gleichzeitig auch das in dem Reinluftauslassbereich angeordnete Rückschlagventil wieder geöffnet, bspw. werden die schwenkbaren Rückschlagklappen wieder in eine Öffnungsposition verschwenkt.It is further contemplated that the valve member is connected by means of a return element, in particular a spring, with the clean air outlet that the valve element is displaced against the restoring force of the return element and in release of a Nebenlufteinlassweges in the direction of the dust-laden air in closed during a Rückspülbetriebs Reinluftauslassbereich. This particularly advantageous embodiment is the Valve element shifted with closed check valve in the direction of the dust air. In this case, the suction force of the force acting on the valve element air flow is used, which acts on the check valve, eg. The pivotable check valves and seeks to pull in the direction of the dust air space, wherein equally the entire valve element is displaced in the direction of dust air. With the aid of the return element arranged between the clean air outlet area and the valve element, it is ensured that a predefined pressure within the clean air outlet area is reached or undershot before the valve element is displaced and thus ambient air can pass through the secondary air inlet path into the clean air space. If the pressure is sufficient to open the secondary air inlet, an equilibrium is advantageously established between the amount of ambient air flowing into the clean air space and the amount of air extracted by means of the external suction fan from the backwashable air filter. The restoring element may advantageously be a spring, but other restoring elements which fulfill the same purpose are also conceivable. If the external suction fan is switched off, the backwashable air filter is vented again and the valve element is moved by the restoring force of the return element back to its original position, at the same time the Nebenlufteinlassweg is closed again. As a result of the ventilation, the check valve arranged in the clean air outlet area is also opened again at the same time, for example, the pivotable non-return flaps are again pivoted into an open position.

Es ist darüber hinaus vorgesehen, dass das Ventilelement und eine Reinigungsdüse im Rückspülbetrieb des Luftfilters so zueinander angeordnet sind, dass durch den Nebenlufteinlassweg eingesaugte Umgebungsluft in die Reinigungsdüse gezwungen wird. Gemäß einer besonders einfachen Ausgestaltung kann das Ventilelement so innerhalb des Reinluftauslassbereiches verschoben werden, dass dieses in einer Rückspülstellung die Reinigungsdüse unmittelbar kontaktiert, so dass die durch den Nebenlufteinlassweg angesaugte Luft ausschließlich in die Reinigungsdüse strömen kann und somit die Reinigung des Filterelementes bewirkt. Alternativ zu einem unmittelbaren Kontakt von Ventilelement und Reinigungsdüse kann es auch vorgesehen sein, dass Ventilelement und Reinigungsdüse an einem gemeinsamen Anlageteil anliegen, wodurch ein Strömungsweg in die Reinigungsdüse vorgegeben ist.It is further provided that the valve element and a cleaning nozzle are arranged in the backwashing of the air filter to each other so that ambient air sucked in by the Nebenlufteinlassweg is forced into the cleaning nozzle. According to a particularly simple embodiment For example, the valve element can be displaced within the clean air outlet region in such a way that it directly contacts the cleaning nozzle in a backwash position so that the air sucked through the secondary air inlet path can flow exclusively into the cleaning nozzle and thus clean the filter element. As an alternative to direct contact of the valve element and the cleaning nozzle, it can also be provided that the valve element and the cleaning nozzle bear against a common contact part, whereby a flow path into the cleaning nozzle is predetermined.

Schließlich ist vorgesehen, dass die Reinigungsdüse eine in dem Reinluftraum drehbar gelagerte Rotationsluftdüse ist. Die Reinigungsdüse weist mindestens eine in Richtung des Filterelementes weisende Düsenöffnung auf, welche so angeordnet und ausgebildet ist, dass die ausströmende Luft die Reinigungsdüse in Rotation versetzt und somit eine Reinigung der Innenfläche des Filterelementes über den gesamten Umfang durchgeführt werden kann. Alternativ dazu kann jedoch auch vorgesehen sein, dass die Reinigungsdüse eine feststehende Düse ist, welche eine solche Vielzahl von Düsenöffnungen aufweist, dass damit ebenfalls eine die gesamte Umfangsfläche umfassende Reinigung möglich ist.Finally, it is provided that the cleaning nozzle is a rotary air nozzle rotatably mounted in the clean air space. The cleaning nozzle has at least one pointing in the direction of the filter element nozzle opening, which is arranged and formed so that the outflowing air, the cleaning nozzle set in rotation and thus cleaning of the inner surface of the filter element over the entire circumference can be performed. Alternatively, however, it may also be provided that the cleaning nozzle is a stationary nozzle, which has such a plurality of nozzle openings, that thus also a cleaning comprising the entire peripheral surface is possible.

Neben dem zuvor dargestellten rückspülbaren Luftfilter wird mit der Erfindung ebenso ein Staubsauger vorgeschlagen, welcher einen rückspülbaren Luftfilter der vorgenannten Art aufweist. Durch die erfindungsgemäße Ausgestaltung kann der rückspülbare Luftfilter gereinigt werden, indem die Saugmündung des Staubsaugers beispielsweise in Kontakt mit einer Saugmündung eines zweiten Staubsaugers gebracht wird. Die Absaugung des rückspülbaren Luftfilters erfolgt dann unmittelbar nach dem Einschalten des zweiten Staubsaugers, wobei der in dem Filterelement des erfindungsgemäßen Staubsaugers gesammelte Staub in den zweiten Staubsauger eingesaugt wird.In addition to the backwashable air filter previously described, the invention also proposes a vacuum cleaner which has a backwashable air filter of the aforementioned type. The inventive design of the backwashable air filter can be cleaned by the suction mouth of the vacuum cleaner is brought, for example, in contact with a suction mouth of a second vacuum cleaner. The suction of the backwashable air filter then takes place immediately after switching on the second vacuum cleaner, wherein the dust collected in the filter element of the vacuum cleaner according to the invention is sucked into the second vacuum cleaner.

Schließlich wird im Rahmen der Erfindung auch ein Verfahren zum Betrieb eines rückspülbaren Luftfilters, insbesondere eines rückspülbaren Luftfilters der vorgenannten Art, vorgeschlagen, wobei der rückspülbare Luftfilter für einen Rückspülbetrieb strömungstechnisch mit einem eine Saugöffnung des Luftfilters entgegengesetzt zu einer Strömungsrichtung für einen Filterbetrieb beaufschlagenden Sauggebläse verbunden wird, wobei ein einem Reinluftauslassbereich des Luftfilters zugeordnetes Ventilelement den Reinluftauslassbereich mittels eines von einem Reinluftraum in Richtung eines Staubluftraumes strömenden Luftstroms verschließt und mindestens einen Nebenlufteinlassweg zum Einlass von Umgebungsluft in den Reinluftraum freigibt.Finally, in the invention, a method for operating a backwashable air filter, in particular a backwashable air filter of the aforementioned type, proposed, wherein the backwashable air filter for a backwash is fluidly connected to a suction opening of the air filter opposite to a flow direction for a filter operation acting suction fan wherein a valve element associated with a clean air outlet region of the air filter closes the clean air outlet region by means of an air flow flowing from a clean air space in the direction of dust air space and releases at least one secondary air inlet path for the admission of ambient air into the clean air space.

Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels näher erläutert. Es zeigen:

Fig. 1
eine perspektivische Darstellung eines Staubsaugers mit einem rückspülbaren Luftfilter während eines Filterbetriebs,
Fig. 2
eine perspektivische Darstellung des Staubsaugers gemäß Fig. 1 mit einem geschlossenen Rückschlagventil,
Fig. 3
eine perspektivische Darstellung des Staubsaugers gemäß Fig. 1 während eines Rückspülbetriebs,
Fig. 4
eine Prinzipskizze eines erfindungsgemäßen rückspülbaren Luftfilters während eines Filterbetriebs,
Fig. 5
eine Reinigungsdüse,
Fig. 6
eine Prinzipskizze des rückspülbaren Luftfilters gemäß Fig. 4 mit einem geschlossenen Rückschlagventil,
Fig. 7
eine Prinzipskizze des rückspülbaren Luftfilters gemäß Fig. 4 während eines Rückspülbetriebs.
In the following the invention will be explained in more detail with reference to an embodiment. Show it:
Fig. 1
a perspective view of a vacuum cleaner with a backwashable air filter during a filter operation,
Fig. 2
a perspective view of the vacuum cleaner according to Fig. 1 with a closed check valve,
Fig. 3
a perspective view of the vacuum cleaner according to Fig. 1 during a backwashing operation,
Fig. 4
a schematic diagram of a back-flushable air filter according to the invention during a filter operation,
Fig. 5
a cleaning nozzle,
Fig. 6
a schematic diagram of the backwash air filter according to Fig. 4 with a closed check valve,
Fig. 7
a schematic diagram of the backwash air filter according to Fig. 4 during a backwash operation.

Fig. 1 zeigt einen Staubsauger 1, nämlich einen Handstaubsauger, mit einem rückspülbaren Luftfilter 2. Der rückspülbare Luftfilter 2 verfügt über ein zylindrisches Filterelement 3, in welchem koaxial eine ebenfalls zylindrische Reinigungsdüse 6 mit Düsenöffnungen 7 zur Rückspülung des Filterelementes 3 während eines Rückspülbetriebs angeordnet ist. Der Luftfilter 2 weist ein Ventilelement 9 mit Rückschlagklappen 13 auf, welche in dem dargestellten Filterbetrieb geöffnet sind, so dass die gefilterte Luft zu einem Sauggebläse 16 des Staubsaugers 1 gelangt. Fig. 1 The back-flushable air filter 2 has a cylindrical filter element 3, in which coaxially a likewise cylindrical cleaning nozzle 6 with nozzle openings 7 for backwashing the filter element 3 during a backwash operation is arranged. The air filter 2 has a valve element 9 with check valves 13, which are open in the illustrated filter operation, so that the filtered air reaches a suction fan 16 of the vacuum cleaner 1.

Fig. 2 zeigt den in Figur 1 dargestellten Luftfilter 2 mit geschlossenen Rückschlagklappen 13. Fig. 2 shows the in FIG. 1 shown air filter 2 with closed check valves 13th

Fig. 3 zeigt den in Figur 1 dargestellten Luftfilter 2 während eines Rückspülbetriebs. In dem Rückspülbetrieb sind die Rückschlagklappen 13 geschlossen, wobei das Ventilelement 9 in Richtung der Reinigungsdüse 6 verschoben ist, so dass Nebenlufteinlassöffnungen 11 freigegeben sind, durch welche Umgebungsluft zur Reinigung des Filterelementes 3 in den Luftfilter 2 eingezogen werden kann. Fig. 3 shows the in FIG. 1 illustrated air filter 2 during a backwash operation. In the backwashing operation, the check valves 13 are closed, wherein the valve element 9 is displaced in the direction of the cleaning nozzle 6, so that secondary air inlet openings 11 are released, through which ambient air can be drawn into the air filter 2 for cleaning the filter element 3.

Fig. 4 zeigt eine detaillierte Prinzipskizze des in Figur 1 dargestellten rückspülbaren Luftfilters 2 in einem Filterbetrieb. Während des Filterbetriebs reinigt der rückspülbare Luftfilter 2 die über eine Saugöffnung 15 in den Luftfilter 2 gesaugte Luft, welche regelmäßig mit Staub und/ oder Schmutz beaufschlagt ist. Der rückspülbare Luftfilter 2 weist das Filterelement 3 auf, welches bspw. ein Material mit Filtereigenschaften, bspw. ein Vlies, beinhaltet. Das Filterelement 3 trennt einen Reinluftraum 4 des rückspülbaren Luftfilters 2 von einem Staubluftraum 8. Der Reinluftraum 4 ist derjenige Teilbereich des Luftfilters 2, welcher in Strömungsrichtung der mit Staub beaufschlagten Luft vor dem Filterelement 3 liegt. Der Staubluftraum 8 ist derjenige Bereich des Luftfilters 2, welcher in Strömungsrichtung der mit Staub beaufschlagten Luft hinter dem Filterelement 3 liegt. In dem Reinluftraum 4 des Luftfilters 2 ist die Reinigungsdüse 6 mit den Düsenöffnungen 7 angeordnet. Die Reinigungsdüse 6 ist während des Filterbetriebs des Luftfilters 2 nicht durchströmt. Fig. 4 shows a detailed schematic diagram of in FIG. 1 illustrated backwashable air filter 2 in a filter operation. During the filter operation cleans the backwashable air filter 2, the air sucked through a suction port 15 into the air filter 2, which is regularly subjected to dust and / or dirt. The backwashable air filter 2 has the filter element 3, which, for example, a material with filter properties, for example. A nonwoven includes. The filter element 3 separates a clean air space 4 of the backwashable air filter 2 from a dust air space 8. The clean air space 4 is that portion of the air filter 2, which lies in the flow direction of the dust-laden air in front of the filter element 3. The dust-air chamber 8 is that region of the air filter 2 which lies behind the filter element 3 in the flow direction of the air which is exposed to dust. In the clean air space 4 of the air filter 2, the cleaning nozzle 6 is arranged with the nozzle openings 7. The cleaning nozzle 6 is not flowed through during the filtering operation of the air filter 2.

Dem Reinluftraum 4 ist ein Reinluftauslassbereich 5 zugeordnet, durch welchen die mittels des Filterelementes 3 gereinigte Luft zu einem Sauggebläse 16 des Staubsaugers 1 gelangen kann. Das Sauggebläse 16 ist nicht Teil des Luftfilters 2. An dem Reinluftauslassbereich 5, hier beispielsweise innerhalb des Reinluftauslassbereiches 5, ist das Ventilelement 9 angeordnet, welches ausgebildet ist, für einen Rückspülbetrieb des Luftfilters 2 den Reinluftauslassbereich 5 zu verschließen und mindestens einen den Reinluftraum 4 mit der Umgebungsluft verbindenden Nebenlufteinlassweg 10 freizugeben. Zu diesem Zweck verfügt das Ventilelement 9 über die Nebenlufteinlassöffnung 11, welche mit einer Nebenlufteinlassöffnung 11 des Reinluftauslassbereiches 5 korrespondiert. Das Ventilelement 9 verfügt zudem über ein Rückschlagventil 12, welches im vorliegenden Beispiel die beiden Rückschlagklappen 13 aufweist. Zwischen dem Ventilelement 9 und dem Reinluftauslassbereich 5 ist ein Rückstellelement 14, hier eine Feder, angeordnet.The clean air space 4 is assigned a clean air outlet area 5, by means of which the air cleaned by means of the filter element 3 can reach a suction blower 16 of the vacuum cleaner 1. The suction fan 16 is not part of the air filter 2. At the clean air outlet 5, here for example within the clean air outlet 5, the valve element 9 is arranged, which is designed to close the clean air outlet 5 for a backwash operation of the air filter 2 and at least one clean air chamber 4 with release the secondary air inlet path 10 connecting the ambient air. For this purpose, the valve element 9 has the secondary air inlet opening 11, which corresponds to a secondary air inlet opening 11 of the clean air outlet area 5. The valve element 9 also has a check valve 12, which has the two check valves 13 in the present example. Between the valve element 9 and the clean air outlet region 5, a return element 14, here a spring, is arranged.

Fig. 5 zeigt die Reinigungsdüse 6, welche zur Reinigung des Filterelementes 3 koaxial in den Reinluftraum 4 des Luftfilters 2 eingesetzt werden kann. Die Reinigungsdüse 6 verfügt bspw. über zwei Düsenöffnungen 7, welche sich schlitzförmig in axiale Richtung der Reinigungsdüse 6 erstrecken. Die Düsenöffnungen 7 weisen eine Luftaustrittsrichtung auf, welche in Bezug auf die radiale Richtung der Reinigungsdüse 6 im Wesentlichen einen Winkel ungleich 0° aufweist, so dass die Reinigungsdüse 6 bei Durchströmung mit Luft in Rotation versetzt wird. Fig. 5 shows the cleaning nozzle 6, which can be used to clean the filter element 3 coaxially into the clean air space 4 of the air filter 2. The cleaning nozzle 6 has, for example, two nozzle openings 7 which extend in slot-like fashion in the axial direction of the cleaning nozzle 6. The nozzle openings 7 have an air outlet direction, which with respect to the radial direction of the cleaning nozzle 6 substantially at an angle not equal to 0 °, so that the cleaning nozzle 6 is set in rotation with air in rotation.

Fig. 6 zeigt den rückspülbaren Luftfilter 2 gemäß Fig. 4 mit geschlossenen Rückschlagklappen 13 (analog Fig. 2). Diese Stellung nimmt der Luftfilter 2 bei einem Wechsel von einem Filterbetrieb in einen Rückspülbetrieb ein. Dabei wird der Luftfilter 2 über die Saugöffnung 15 von einem Sauggebläse, beispielsweise dem Sauggebläse eines zweiten Staubsaugers, mit Unterdruck beaufschlagt, so dass sich das in dem Reinluftauslassbereich 5 angeordnete Rückschlagventil 12 schließt. Hier werden die beiden Rückschlagklappen 13 des Rückschlagventils 12 in den Reinluftauslassbereich 5 verschwenkt, so dass der Reinluftauslassbereich 5 strömungstechnisch von dem Sauggebläse 16 des Staubsaugers 1 getrennt wird. Alternativ zu der Rückspülung mittels des Sauggebläses eines zweiten Staubsaugers kann selbstverständlich auch das Sauggebläse desselben Staubsaugers verwendet werden, indem dieses auf die Saugöffnung 15 des Luftfilters 2 geschaltet wird. Fig. 6 shows the backwashable air filter 2 according to Fig. 4 with closed check valves 13 (analog Fig. 2 ). This position takes the air filter 2 in a change from a filter operation in a backwash one. In this case, the air filter 2 is acted upon via the suction opening 15 by a suction fan, for example the suction fan of a second vacuum cleaner, with negative pressure, so that the arranged in the clean air outlet 5 check valve 12 closes. Here, the two non-return valves 13 of the check valve 12 are pivoted into the clean air outlet region 5, so that the clean air outlet region 5 is fluidly separated from the suction fan 16 of the vacuum cleaner 1. As an alternative to the backwashing by means of the suction fan of a second vacuum cleaner, naturally the suction fan of the same vacuum cleaner can also be used by switching it to the suction opening 15 of the air filter 2.

Fig. 7 zeigt den in den Figuren 4 und 6 dargestellten rückspülbaren Luftfilter 2 während des Rückspülbetriebs (analog Fig. 3). Während des Rückspülbetriebs ist das Rückschlagventil 12 verschlossen, wobei der Saugluftstrom des externen Sauggebläses die Rückschlagklappen 13 in Richtung des Staubluftraumes 8 zu ziehen sucht. Dadurch wird das beweglich an dem Reinluftauslassbereich 5 angeordnete Ventilelement 9 in Richtung der Reinigungsdüse 6 gezogen, wobei sich das Ventilelement 9 gegen die Rückstellkraft des Rückstellelementes 14 verschiebt. Die innerhalb des Reinluftauslassbereiches 5 und des Ventilelementes 9 ausgebildeten Nebenlufteinlassöffnungen 11 gelangen in Bezug auf eine radiale Richtung des Luftfilters 2 nebeneinander, so dass ein Lufteinlassweg 10 freigegeben wird. Fig. 7 shows the in the FIGS. 4 and 6 illustrated back-flushable air filter 2 during the backwash operation (analog Fig. 3 ). During the backwashing operation, the check valve 12 is closed, wherein the suction air flow of the external suction blower seeks to pull the check valves 13 in the direction of the dust-laden air space 8. As a result, it becomes movable at the clean air outlet portion 5 arranged valve element 9 is pulled in the direction of the cleaning nozzle 6, wherein the valve element 9 moves against the restoring force of the return element 14. The secondary air inlet openings 11 formed inside the clean air outlet area 5 and the valve element 9 come next to each other with respect to a radial direction of the air filter 2, so that an air inlet path 10 is released.

Der Luftfilter 2 wird, wie beispielhaft in Fig. 1 dargestellt, in einen Staubsauger 1 integriert. Der Luftfilter 2 ist dabei so in den Staubsauger 1 eingebaut, dass er innerhalb dessen Saugluftweg angeordnet ist, das heißt zwischen einem Saugmund des Stausaugers 1 und dem Sauggebläse 16 des Staubsaugers 1. Besonders vorteilhaft kann der Luftfilter 2 dadurch gereinigt, d.h. rückgespült, werden, indem ein zweiter Staubsauger an den Saugmund des ersten Staubsaugers 1 angeschlossen wird.The air filter 2 is, as exemplified in Fig. 1 shown integrated into a vacuum cleaner 1. The air filter 2 is thereby installed in the vacuum cleaner 1 that it is disposed within the Saugluftweg, that is, between a suction mouth of the congestion suction device 1 and the suction fan 16 of the vacuum cleaner 1. Particularly advantageously, the air filter 2 is thereby cleaned, ie backwashed, by connecting a second vacuum cleaner to the suction mouth of the first vacuum cleaner 1.

Bei einer üblichen Benutzung des Staubsaugers 1 zu Reinigungszwecken befindet sich der rückspülbare Luftfilter 2 in dem in den Fig. 1 und 4 dargestellten Filterbetrieb. Dabei wird mittels des Sauggebläses 16 des Staubsaugers 1 Luft durch die Saugöffnung 15 des Luftfilters 2 gesaugt. Die angesaugte Luft gelangt über den Staubluftraum 8 des Luftfilters 2 zu dem Filterelement 3. Die zu filternde Luft strömt durch das Filterelement 3, wobei der in der Luft enthaltene Staub gefiltert wird. Die gefilterte Luft strömt anschließend innerhalb des Reinluftraumes 4 an der (nicht in Betrieb befindlichen) Reinigungsdüse 6 vorbei, ohne diese zu durchsetzen. Schließlich gelangt die gefilterte Luft von dem Reinluftraum 4 in den Reinluftauslassbereich 5 und zu dem Sauggebläse 16. Der Reinluftauslassbereich 5 ist dabei geöffnet, um den Weg zu dem Sauggebläse 16 freizugeben. Zu diesem Zweck befindet sich das Ventilelement 9 in einer Öff-nungsstellung, wobei die beiden Rückschlagklappen 13 an der Innenwandung des Reinluftauslassbereiches 5 anliegen, so dass ein maximaler Strömungsquerschnitt des Reinluftauslassbereiches 5 zur Verfügung steht.In a conventional use of the vacuum cleaner 1 for cleaning purposes, the backwashable air filter 2 is in the in the Fig. 1 and 4 illustrated filter operation. In this case, air is sucked through the suction opening 15 of the air filter 2 by means of the suction fan 16 of the vacuum cleaner 1. The sucked air passes through the dust air chamber 8 of the air filter 2 to the filter element 3. The air to be filtered flows through the filter element 3, wherein the dust contained in the air is filtered. The filtered air then flows within the clean air space 4 past the (not in operation) cleaning nozzle 6, without enforcing them. Finally, the filtered air passes from the clean air space 4 into the clean air outlet area 5 and to the suction fan 16. The clean air outlet area 5 is opened in order to clear the path to the suction fan 16. For this purpose, the valve element 9 is in an opening position, wherein the two check valves 13 on the inner wall of the clean air outlet region 5, so that a maximum flow cross section of the clean air outlet region 5 is available.

Durch den fortschreitenden Filterbetrieb des Luftfilters 2 lagern sich Staub und Schmutz auf dem Filterelement 3 ab. Um die Saugleistung des Staubsaugers 1 aufrecht zu erhalten, ist es daher erforderlich, den Luftfilter 2 zu reinigen, indem das Filterelement 3 von dem Staub und Schmutz befreit wird. Dazu wird der Saugmund des Staubsaugers 1 und damit auch die Saugöffnung 15 des Luftfilters 2 strömungstechnisch mit einem Sauggebläse, beispielsweise einem Sauggebläse eines zweiten Staubsaugers, verbunden, welches die Saugöffnung 15 mit Unterdruck beaufschlagt. Der resultierende Saugluftstrom in Richtung der Saugöffnung 15 greift an den Rückschlagklappen 13 des Rückschlagventils 12 an, so dass diese in den Reinluftauslassbereich 5 verschwenkt werden und den Reinluftauslassbereich 5 verschließen. Diese Situation ist in Fig. 6 dargestellt.Due to the progressive filtering operation of the air filter 2, dust and dirt deposit on the filter element 3. In order to maintain the suction power of the vacuum cleaner 1, it is therefore necessary to clean the air filter 2 by freeing the filter element 3 from the dust and dirt. For this purpose, the suction mouth of the vacuum cleaner 1 and thus also the suction opening 15 of the air filter 2 is fluidically connected to a suction fan, such as a suction fan of a second vacuum cleaner, which acts on the suction port 15 with negative pressure. The resulting suction air flow in the direction of the suction opening 15 acts on the check valves 13 of the check valve 12, so that they are pivoted into the clean air outlet region 5 and close the clean air outlet region 5. This situation is in Fig. 6 shown.

Bei fortschreitender Evakuierung des Luftfilters 2 über die Saugöffnung 15 erhöht sich die an dem Rückschlagventil 12 angreifende Kraft derart, dass das Ventilelement 9 in Richtung der Reinigungsdüse 6 gezogen wird. Diese Situation ist in Fig. 7 dargestellt. Das Ventilelement 9 gelangt dabei derart in Wirkverbindung mit der Reinigungsdüse 6, dass der abgesaugte Luftstrom ausschließlich via der Reinigungsdüse 6 zu der Saugöffnung 15 gelangen kann. Durch die Verschiebung des Ventilelementes 9 innerhalb des Reinluftauslassbereiches 5 sind die korrespondierenden Nebenlufteinlassöffnungen 11 des Ventilelementes 9 und des Reinluftauslassbereiches 5 so nebeneinander geschoben, dass ein Nebenlufteinlassweg 10 freigegeben ist. Durch diesen Nebenlufteinlassweg 10 kann nun Umgebungsluft aus der Umgebung des Luftfilters 2 eingesaugt werden, welche zur Reinigung des Filterelementes 3 dient. Die eingesaugte Luft gelangt von dem Nebenlufteinlassweg 10 durch die Reinigungsdüse 6, das Filterelement 3 und schließlich die Saugöffnung 15 zu dem Sauggebläse. Dadurch, dass die Düsenöffnungen 7 der Reinigungsdüse 6 nicht radial ausgerichtet sind, sondern vielmehr in einem bestimmten Winkel ungleich 0° dazu stehen, rotiert die Reinigungsdüse 6 in Folge einer Durchströmung mit Luft. Durch die Rotation der Reinigungsdüse 6 rotieren die Düsenöffnungen 7 an der Innenwandung des Filterelementes 3 vorbei, so dass das Filterelement 3 über den gesamten Umfang gereinigt werden kann. Der in dem Filterelement 3 enthaltene Staub wird aus dem Filterelement 3 herausgelöst und gelangt durch den Staubluftraum 8 zu der Saugöffnung 15.As the evacuation of the air filter 2 progresses via the suction opening 15, the force acting on the check valve 12 increases such that the valve element 9 is pulled in the direction of the cleaning nozzle 6. This situation is in Fig. 7 shown. In this case, the valve element 9 comes into operative connection with the cleaning nozzle 6 such that the extracted air flow can reach the suction opening 15 exclusively via the cleaning nozzle 6. Due to the displacement of the valve element 9 within the clean air outlet area 5, the corresponding secondary air inlet openings 11 of the valve element 9 and the clean air outlet area 5 are pushed next to one another such that a secondary air inlet path 10 is released. By this Nebenlufteinlassweg 10 ambient air can now be sucked from the environment of the air filter 2, which serves to clean the filter element 3. The sucked air passes from the Nebenlufteinlassweg 10 through the cleaning nozzle 6, the filter element 3 and finally the suction opening 15 to the suction fan. Characterized in that the nozzle openings 7 of the cleaning nozzle 6 are not radially aligned, but rather are at a certain angle not equal to 0 °, the cleaning nozzle 6 rotates due to a flow of air. By the rotation of the cleaning nozzle 6, the nozzle openings 7 rotate past the inner wall of the filter element 3, so that the filter element 3 can be cleaned over the entire circumference. The dust contained in the filter element 3 is released from the filter element 3 and passes through the dust air space 8 to the suction opening 15th

Sobald der Luftfilter 2 nicht mehr über die Saugöffnung 15 mit Unterdruck beaufschlagt wird, sinkt die an dem Rückschlagventil 12 angreifende Saugkraft. Infolgedessen überwiegt die Rückstellkraft des Rückstellelementes 14 die an dem Rückschlagventil 12 angreifende Saugkraft, so dass das Ventilelement 9 wieder in seine Ausgangsposition für einen Filterbetrieb zurückgezogen wird. Durch die Verschiebung des Ventilelementes 9 innerhalb des Reinluftauslassbereiches 5 werden die Nebenlufteinlassöffnungen 11 wieder zueinander verschoben, so dass gleichzeitig auch der Nebenlufteinlassweg 10 versperrt wird. Ebenso wird das Ventilelement 9 auch von der Reinigungsdüse 6 getrennt, so dass der direkte Weg zwischen Filterelement 3 und Reinluftauslassbereich 5, ohne den Umweg über die Reinigungsdüse 6, wieder freigegeben ist.As soon as the air filter 2 is no longer subjected to negative pressure via the suction opening 15, the suction force acting on the non-return valve 12 decreases. As a result, the restoring force of the return element 14 outweighs the suction force acting on the check valve 12, so that the valve element 9 is withdrawn back into its starting position for a filter operation. As a result of the displacement of the valve element 9 within the clean air outlet region 5, the secondary air inlet openings 11 are again displaced relative to one another, so that the secondary air inlet path 10 is also blocked at the same time. Likewise, the valve element 9 is also separated from the cleaning nozzle 6, so that the direct path between the filter element 3 and clean air outlet 5, without the detour via the cleaning nozzle 6, is released again.

Der somit gereinigte Luftfilter 2 kann nun wieder für einen Filterbetrieb eingesetzt werden.The thus cleaned air filter 2 can now be used again for a filter operation.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Staubsaugervacuum cleaner
22
Luftfilterair filter
33
Filterelementfilter element
44
ReinluftraumClean air chamber
55
ReinluftauslassbereichReinluftauslassbereich
66
Reinigungsdüsecleaning nozzle
77
Düsenöffnungnozzle opening
88th
StaubluftraumDust airspace
99
Ventilelementvalve element
1010
NebenlufteinlasswegNebenlufteinlassweg
1111
NebenlufteinlassöffnungIn addition to air inlet opening
1212
Rückschlagventilcheck valve
1313
Rückschlagklappecheck valve
1414
RückstellelementReturn element
1515
Saugöffnungsuction opening
1616
Sauggebläseaspirator

Claims (10)

Rückspülbarer Luftfilter (2), insbesondere für einen Staubsauger (1), mit einem einen Staubluftraum (8) von einem Reinluftraum (4) trennenden Filterelement (3), welches in einem Filterbetrieb von zu reinigender Luft aus Richtung des Staubluftraumes (8) in Richtung des Reinluftraumes (4) durchströmt wird, wobei dem Reinluftraum (4) ein Reinluftauslassbereich (5) zugeordnet ist, dadurch gekennzeichnet, dass der Reinluftauslassbereich (5) ein Ventilelement (9) aufweist, welches ausgebildet ist, in einem Rückspülbetrieb infolge der Öffnung eines Nebenlufteinlassweges (10), welcher in Strömungsrichtung für einen Filterbetrieb dem Reinluftauslassbereich (5) nachgeordnet ist, eine Rückspülung des Filterelementes (3) mit Umgebungsluft zu ermöglichen.Backwashable air filter (2), in particular for a vacuum cleaner (1), with a filter element (3) separating a dusty air space (8) from a clean air space (4), which in a filter operation of air to be cleaned from the direction of dust air space (8) in the direction the clean air space (4) is flowed through, wherein the clean air chamber (4) a Reinluftauslassbereich (5) is associated, characterized in that the Reinluftauslassbereich (5) comprises a valve element (9) which is formed in a backwash operation due to the opening of a bleed air inlet path (10), which downstream of the clean air outlet region (5) is arranged in the flow direction for a filter operation to allow a backwashing of the filter element (3) with ambient air. Rückspülbarer Luftfilter (2) nach Anspruch 1, dadurch gekennzeichnet, dass das Ventilelement (9) ausgebildet ist, den Reinluftauslassbereich (5) mittels eines in einem Rückspülbetrieb von dem Reinluftraum (4) in Richtung des Staubluftraumes (8) strömenden Luftstroms zu verschließen und mindestens einen Nebenlufteinlassweg (10) freizugeben, welcher den Reinluftraum (4) mit der den Luftfilter (2) umgebenden Umgebungsluft verbindet.Backwashable air filter (2) according to claim 1, characterized in that the valve element (9) is designed to close the clean air outlet region (5) by means of a in a backwash operation of the clean air space (4) in the direction of dust air space (8) flowing air flow and at least to release a secondary air inlet path (10) which connects the clean air space (4) with the ambient air surrounding the air filter (2). Rückspülbarer Luftfilter (2) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Ventilelement (9) verschiebbar an dem Reinluftauslassbereich (5), insbesondere in dem Reinluftauslassbereich, angeordnet ist.Backwashable air filter (2) according to claim 1 or 2, characterized in that the valve element (9) is displaceably arranged on the clean air outlet region (5), in particular in the clean air outlet region. Rückspülbarer Luftfilter (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Ventilelement (9) und der Reinluftauslassbereich (5) zueinander korrespondierende Nebenlufteinlassöffnungen (11) aufweisen, welche durch eine Verschiebung des Ventilelementes (9) relativ zu dem Reinluftauslassbereich (5) so zueinander anordenbar sind, dass ein Nebenlufteinlassweg (10) freigegeben ist.Backwashable air filter (2) according to one of the preceding claims, characterized in that the valve element (9) and the clean air outlet region (5) have mutually corresponding secondary air inlet openings (11) which are displaced by a displacement of the valve element (9) relative to the clean air outlet region (5). can be arranged to each other, that a Nebenlufteinlassweg (10) is released. Rückspülbarer Luftfilter (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Ventilelement (9) ein Rückschlagventil (12) aufweist, welches so angeordnet und ausgebildet ist, dass dieses den Reinluftauslassbereich (5) bei einer Durchströmung des Luftfilters (2) mittels eines von dem Reinluftraum (4) in Richtung des Staubluftraumes (8) strömenden Luftstroms verschließt.Backwashable air filter (2) according to any one of the preceding claims, characterized in that the valve element (9) has a check valve (12) which is arranged and designed such that this the clean air outlet (5) by a flow through the air filter (2) one of the clean air space (4) in the direction of the dust air space (8) flowing air flow closes. Rückspülbarer Luftfilter (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Ventilelement (9) mittels eines Rückstellelementes (14), insbesondere einer Feder, so mit dem Reinluftauslassbereich (5) verbunden ist, dass das Ventilelement (9) bei während eines Rückspülbetriebs verschlossenem Reinluftauslassbereich (5) entgegen der Rückstellkraft des Rückstellelementes und unter Freigabe eines Nebenlufteinlassweges (10) in Richtung des Staubluftraumes (8) verschoben ist.Backwashable air filter (2) according to one of the preceding claims, characterized in that the valve element (9) by means of a return element (14), in particular a spring, so with the clean air outlet (5) is connected, that the valve element (9) during during a Backwashing mode closed clean air outlet (5) against the restoring force of the return element and the release of a Nebenlufteinlassweges (10) in the direction of dust air space (8) is shifted. Rückspülbarer Luftfilter (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Ventilelement (9) und eine Reinigungsdüse (6) im Rückspülbetrieb des Luftfilters (2) so zueinander angeordnet sind, dass durch den Nebenlufteinlassweg (10) eingesaugte Umgebungsluft in die Reinigungsdüse (6) gezwungen wird.Backflushing the air filter (2) according to any one of the preceding claims, characterized in that the valve element (9) and a cleaning nozzle (6) in backflushing operation the air filter (2) are arranged relative to one another that by Nebenlufteinlassweg (10) sucked ambient air in the cleaning nozzle (6) is forced. Rückspülbarer Luftfilter (2) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Reinigungsdüse (6) eine in dem Reinluftraum (4) drehbar gelagerte Rotationsluftdüse ist.Backwashable air filter (2) according to one of the preceding claims, characterized in that the cleaning nozzle (6) in the clean air space (4) rotatably mounted rotary air nozzle. Staubsauger (1) mit einem rückspülbaren Luftfilter (2) nach einem der Ansprüche 1 bis 8.Vacuum cleaner (1) with a back-flushable air filter (2) according to one of claims 1 to 8. Verfahren zum Betrieb eines rückspülbaren Luftfilters (2), insbesondere eines rückspülbaren Luftfilters (2) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der rückspülbare Luftfilter (2) für einen Rückspülbetrieb strömungstechnisch mit einem eine Saugöffnung (15) des Luftfilters (2) entgegengesetzt zu einer Strömungsrichtung für einen Filterbetrieb beaufschlagenden Sauggebläse verbunden wird, wobei ein einem Reinluftauslassbereich (5) des Luftfilters (2) zugeordnetes Ventilelement (9) den Reinluftauslassbereich (5) mittels eines von einem Reinluftraum (4) in Richtung eines Staubluftraumes (8) strömenden Luftstroms verschließt und mindestens einen Nebenlufteinlassweg (10) zum Einlass von Umgebungsluft in den Reinluftraum (4) freigibt.Method for operating a backwashable air filter (2), in particular a backwashable air filter (2) according to one of claims 1 to 8, characterized in that the backwashable air filter (2) for a backwash operation fluidly with a suction opening (15) of the air filter (2 A valve element (9) associated with a clean-air outlet region (5) of the air filter (2) controls the clean-air outlet region (5) by means of one of a clean-air chamber (4) in the direction of a dust-laden air chamber (8). closing air flow and at least one Nebenlufteinlassweg (10) for the admission of ambient air into the clean air space (4) releases.
EP15177489.0A 2014-08-01 2015-07-20 Back-flushable air filter Active EP2979602B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014110940.6A DE102014110940A1 (en) 2014-08-01 2014-08-01 Backwashable air filter

Publications (2)

Publication Number Publication Date
EP2979602A1 true EP2979602A1 (en) 2016-02-03
EP2979602B1 EP2979602B1 (en) 2020-02-12

Family

ID=54065655

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15177489.0A Active EP2979602B1 (en) 2014-08-01 2015-07-20 Back-flushable air filter

Country Status (5)

Country Link
EP (1) EP2979602B1 (en)
JP (1) JP6655902B2 (en)
CN (1) CN105311890B (en)
DE (1) DE102014110940A1 (en)
ES (1) ES2774338T3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016118807A1 (en) 2015-12-21 2017-06-22 Vorwerk & Co. Interholding Gmbh Backwashable air filter and vacuum cleaner with a backwashable air filter
DE102016119194A1 (en) 2016-10-10 2018-04-12 Vorwerk & Co. Interholding Gmbh Vacuum cleaner with a filter element
DE102016119196A1 (en) 2016-10-10 2018-04-12 Vorwerk & Co. Interholding Gmbh Vacuum cleaner with a filter element
DE102016119195A1 (en) 2016-10-10 2018-04-12 Vorwerk & Co. Interholding Gmbh Vacuum cleaner with a filter element
JP2021151483A (en) * 2014-12-10 2021-09-30 アイロボット・コーポレーション Debris evacuation for cleaning robot

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015108558A1 (en) * 2015-05-29 2016-12-01 Vorwerk & Co. Interholding Gmbh air filter
CN206792357U (en) * 2016-12-01 2017-12-26 天佑电器（苏州）有限公司 Dust catcher
SE542082C2 (en) * 2017-05-02 2020-02-18 Husqvarna Ab Valve, use of such valve, separator comprising such valve and method of cleaning a separator body
JP7103373B2 (en) 2017-12-14 2022-07-20 工機ホールディングス株式会社 Dust collector
DE102017223172A1 (en) * 2017-12-19 2019-06-19 Vorwerk & Co. Interholding Gmbh Control of an air cleaning device
CN108309141A (en) * 2018-02-08 2018-07-24 南通航运职业技术学院 A kind of dust-extraction unit applied to harbour
EP3788926A4 (en) * 2018-05-04 2021-10-13 Tineco Intelligent Technology Co., Ltd. Filter cleaning apparatus and filter cleaning system
JP7492318B2 (en) * 2019-06-05 2024-05-29 東芝ライフスタイル株式会社 Vacuum cleaner
EP3772310A1 (en) * 2019-08-05 2021-02-10 Hilti Aktiengesellschaft Device for compensating for pressure variations
CN110665300A (en) * 2019-11-06 2020-01-10 上海蓝科石化环保科技股份有限公司 Continuous gas-solid filtering device and process
CN113540551B (en) * 2021-06-22 2022-09-06 万向一二三股份公司 Pole piece adsorption clamping hand of laminating machine
CN113566343A (en) * 2021-09-07 2021-10-29 韦氏（苏州）医疗科技有限公司 Medical air purification type air conditioning system
JP2023056894A (en) * 2021-10-08 2023-04-20 パナソニックＩｐマネジメント株式会社 Cleaner connectable to collection device
CN114631753B (en) * 2022-02-25 2023-06-06 深圳银星智能集团股份有限公司 Cleaning apparatus
GB2618379A (en) * 2022-05-06 2023-11-08 Dyson Technology Ltd Vacuum cleaning system
GB2628564A (en) 2023-03-29 2024-10-02 Inheriting Earth Ltd Filter system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19517197A1 (en) 1995-05-11 1996-11-14 Manfred Butsch Self-cleaning industrial vacuum cleaner
EP1092382A2 (en) * 1999-10-12 2001-04-18 WAP Reinigungssysteme GmbH & Co. Dedusting filters in a suction cleaner
WO2009031961A1 (en) * 2007-09-07 2009-03-12 Aktiebolaget Electrolux Vacuum cleaner
WO2010028787A1 (en) * 2008-09-13 2010-03-18 Nilfisk-Advance A/S Filter cleaning in a vacuum having a flap element

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5222694Y2 (en) * 1972-01-25 1977-05-24
JPS5242620Y2 (en) * 1972-05-04 1977-09-27
JPS5251485Y2 (en) * 1972-05-04 1977-11-22
JPS4997569U (en) * 1972-12-09 1974-08-22
US5951746A (en) * 1995-11-30 1999-09-14 Alfred Karcher Gmbh & Co. Suction device for cleaning purposes
JP3316476B2 (en) * 1999-05-31 2002-08-19 株式会社アンレット Filter cleaning device in fume recovery machine
JP3457929B2 (en) * 2000-07-13 2003-10-20 日本クリーナー販売株式会社 Cleaning equipment
JP4980401B2 (en) * 2009-09-16 2012-07-18 三菱電機株式会社 Electric vacuum cleaner
CN202538463U (en) * 2012-02-23 2012-11-21 胡高中 Multipurpose efficient energy-saving backwashing full-automatic filter device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19517197A1 (en) 1995-05-11 1996-11-14 Manfred Butsch Self-cleaning industrial vacuum cleaner
EP1092382A2 (en) * 1999-10-12 2001-04-18 WAP Reinigungssysteme GmbH & Co. Dedusting filters in a suction cleaner
WO2009031961A1 (en) * 2007-09-07 2009-03-12 Aktiebolaget Electrolux Vacuum cleaner
WO2010028787A1 (en) * 2008-09-13 2010-03-18 Nilfisk-Advance A/S Filter cleaning in a vacuum having a flap element

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021151483A (en) * 2014-12-10 2021-09-30 アイロボット・コーポレーション Debris evacuation for cleaning robot
JP7342061B2 (en) 2014-12-10 2023-09-11 アイロボット・コーポレーション Debris discharge for cleaning robots
US12004704B2 (en) 2014-12-10 2024-06-11 Irobot Corporation Debris evacuation for cleaning robots
DE102016118807A1 (en) 2015-12-21 2017-06-22 Vorwerk & Co. Interholding Gmbh Backwashable air filter and vacuum cleaner with a backwashable air filter
DE102016119194A1 (en) 2016-10-10 2018-04-12 Vorwerk & Co. Interholding Gmbh Vacuum cleaner with a filter element
DE102016119196A1 (en) 2016-10-10 2018-04-12 Vorwerk & Co. Interholding Gmbh Vacuum cleaner with a filter element
DE102016119195A1 (en) 2016-10-10 2018-04-12 Vorwerk & Co. Interholding Gmbh Vacuum cleaner with a filter element

Also Published As

Publication number Publication date
DE102014110940A1 (en) 2016-02-04
ES2774338T3 (en) 2020-07-20
JP2016034484A (en) 2016-03-17
JP6655902B2 (en) 2020-03-04
CN105311890B (en) 2020-06-16
CN105311890A (en) 2016-02-10
EP2979602B1 (en) 2020-02-12

Similar Documents

Publication Publication Date Title
EP2979602B1 (en) Back-flushable air filter
EP3033983B1 (en) Base station for a vacuum cleaner
EP3644816B1 (en) Filter cleaning
EP1092382B1 (en) Dedusting filter apparatus for a suction cleaner
DE102016124786A1 (en) Vacuum cleaner as well as system of a vacuum cleaner and a base station
WO2018149544A1 (en) Method for filtration of gases loaded with particles, and filter device for carrying out such a method
DE102016118807A1 (en) Backwashable air filter and vacuum cleaner with a backwashable air filter
EP4216785A1 (en) Filter device, and method for cleaning same
DE102016119196A1 (en) Vacuum cleaner with a filter element
DE102015108558A1 (en) air filter
DE102015108559A1 (en) Backwashable air filter
EP2835089B1 (en) A method of operating a vacuum cleaner for cleaning a from the vacuum cleaner comprised filter element
DE102010006556B4 (en) Air filter of an internal combustion engine
DE2254490C3 (en) Device for separating waste fibers from an air stream
DE102016119195A1 (en) Vacuum cleaner with a filter element
WO2017076392A1 (en) Dust removal system
DE102016119194A1 (en) Vacuum cleaner with a filter element
DE102015109999A1 (en) Air filtration system
DE102016100820A1 (en) vacuum cleaning
DE102011083449B4 (en) Collecting container for a cyclone vacuum cleaner
EP0956806B1 (en) Suction device for sucking in dirt or suction material containing dirt
EP2446794B1 (en) Filter cleaning system for a vacuum cleaner
EP3205249B1 (en) Vacuum cleaner, in particular hand-held vacuum cleaner
DE202011002455U1 (en) Filter device and suction with filter device
EP2123204B1 (en) Device for regulating the suction air stream of a suction device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20160321

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20171124

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20190830

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1230987

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200215

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502015011676

Country of ref document: DE

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2774338

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20200720

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200512

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20200212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200512

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200612

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200513

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200705

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CZ

Payment date: 20200714

Year of fee payment: 6

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502015011676

Country of ref document: DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20200720

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20201113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20200720

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20200731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200731

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200720

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200731

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200720

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200720

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1230987

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210720

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210720

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: CZ

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210720

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200212

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230517

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20230731

Year of fee payment: 9

Ref country code: ES

Payment date: 20230821

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230720

Year of fee payment: 9

Ref country code: DE

Payment date: 20230720

Year of fee payment: 9