EP2835089B1 - Procédé de fonctionnement d'un aspirateur pour le nettoyage d'un élément de filtre enfermé dans l'aspirateur - Google Patents

Procédé de fonctionnement d'un aspirateur pour le nettoyage d'un élément de filtre enfermé dans l'aspirateur Download PDF

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Publication number
EP2835089B1
EP2835089B1 EP14180192.8A EP14180192A EP2835089B1 EP 2835089 B1 EP2835089 B1 EP 2835089B1 EP 14180192 A EP14180192 A EP 14180192A EP 2835089 B1 EP2835089 B1 EP 2835089B1
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EP
European Patent Office
Prior art keywords
gas valve
vacuum cleaner
filter element
clean gas
filter
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EP14180192.8A
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German (de)
English (en)
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EP2835089A3 (fr
EP2835089A2 (fr
Inventor
Andre Bertram
Stefan Tiekötter
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Miele und Cie KG
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Miele und Cie KG
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Publication of EP2835089A3 publication Critical patent/EP2835089A3/fr
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/20—Means for cleaning filters

Definitions

  • the invention relates firstly to a method for operating a vacuum cleaner for cleaning a filter element enclosed by the vacuum cleaner during operation of the suction device, wherein a pressure reading of a pressure sensor associated with a volume in which the filter element is located is detected and compared with a threshold value and a downstream of the filter element arranged clean gas valve is opened in response to exceeding the threshold value to the ambient air.
  • the invention further relates to a vacuum cleaner with a filter element in a volume surrounding the filter element, a clean gas valve which is downstream of the volume comprising the filter element and upstream of the fan, by means of the clean gas valve between an airway in the vacuum cleaner to a blower of the vacuum cleaner and an airway is switchable to the ambient air.
  • Bagless household vacuum cleaners comprise in a dust chamber a filter element, on which accumulates dust collected during operation of the vacuum cleaner.
  • Bagless household vacuum cleaners comprise a centrifugal separator and a filter element connected downstream of the centrifugal separator.
  • the filter element stores the emission of the centrifugal separator, namely the dust fraction passing through the centrifugal separator.
  • Both the centrifugal separator and the filter element are located in front of the vacuum cleaner fan.
  • central filter systems a special embodiment of a centrifugal separator, the filter element is located as a so-called central filter within the centrifugal separator.
  • the filter element must be freed and cleaned regularly and at relatively short intervals in the course of its use in order to keep the suction power of the vacuum cleaner largely constant.
  • a motor-driven scraper which is arranged in the interior of the central filter, is used to knock off the dust from the filter folds, as described, for example, in US Pat WO 2011/12479 A is described.
  • a disadvantage of this approach for back-cleaning the filter element encompassed by the vacuum cleaner is the mechanical loading of the filter folds by the scraper as a result of the deformation of the filter folds and the comparatively intensive operating noise of the scraper in the form of a "rattle" during the rotation.
  • the DE 12 45 550 B describes a method for operating a vacuum cleaner for cleaning back a filter element (3) enclosed by the vacuum cleaner during operation of the vacuum cleaner, wherein a pressure reading of a pressure sensor associated with a volume in which the filter element is located is detected and compared with the threshold value, and wherein a downstream of the filter element arranged clean gas valve is opened in response to exceeding the threshold value to the ambient air.
  • a pressure reading of a pressure sensor associated with a volume in which the filter element is located is detected and compared with the threshold value, and wherein a downstream of the filter element arranged clean gas valve is opened in response to exceeding the threshold value to the ambient air.
  • the invention thus presents the problem, for household vacuum cleaners, in particular for commercially available bagless vacuum cleaners, to provide a solution for the efficient, but at the same time material-saving, cleaning of a filter element encompassed by the respective vacuum cleaner.
  • a pressure reading of a pressure sensor associated with a volume in which the filter element is located is detected and compared with a threshold value in that a clean gas valve arranged downstream of the filter element is opened as a function of an exceeding of the threshold value to the ambient air.
  • the volume in which the filter element is located is either the dust chamber of the respective vacuum cleaner or, in the case of a bagless vacuum cleaner with a central filter, the centrifugal separator comprised by such a vacuum cleaner, which is often referred to as a separator in the following.
  • Flow direction information refers, unless otherwise stated, to the normal direction of air flow in the vacuum cleaner during suction operation due to the negative pressure created by the blower of the vacuum cleaner. This also applies to the above position specification of the clean gas valve.
  • the method for back cleaning of the filter element is therefore based, similar to that in the DE 10 2010 029 518 A described approach, on an at least temporary reversal of the flow of air through the filter element and thus causing "backwashing" of the filter, which causes the dust deposited on the filter element and the filter element thus cleaned (regenerated) is.
  • a pressure measured value is detected and compared with a predetermined or predefinable threshold value.
  • the pressure reading shows either a sufficient negative pressure in the volume in which the filter element is located, ie in the dust chamber or in the interior of the separator, or a high degree of contamination of the filter element or both.
  • volume in which the filter element is located instead of the term "volume in which the filter element is located", reference will only be made to a separator as an example of such a volume. Other volumes in which the filter element may be located, for example the dust chamber of a vacuum cleaner, are to be read along with each mention of a separator.
  • the return cleaning of the filter element can be effected by reversing the direction of flow through the filter element.
  • the clean gas valve arranged downstream of the filter element is opened, specifically as a function of an exceeding of the abovementioned threshold value.
  • ambient air is drawn into the separator due to the negative pressure in the separator. This causes the reversal of the air flow through the filter element.
  • the filter element is flushed with ambient air quasi. This filter backwashing releases dust deposited on the filter element and the filter element is regenerated.
  • the clean gas valve is designed and arranged so that it blocks the air path to the vacuum cleaner fan when opening to the ambient air. This ensures a complete reversal of the air flow and thus leads to a particularly efficient cleaning of the filter element.
  • the vacuum cleaner according to the invention which comprises a filter element in a volume surrounding the filter element, for example in a separator, as well as a clean gas valve and a raw gas valve, is further characterized in that by means of the raw gas valve during suction operation of the vacuum cleaner an influx of raw gas into the Volume / the separator is blockable, wherein the raw gas valve is located upstream of the separator, and that by means of the clean gas valve, an air path in the vacuum cleaner between an airway to a blower of the vacuum cleaner and an air path to the ambient air is switchable, wherein the clean gas valve downstream of the separator and upstream the blower is located.
  • the vacuum cleaner according to the invention which comprises a filter element in a volume surrounding the filter element, for example in a separator, as well as a clean gas valve and a pressure sensor is further characterized in that by means of the clean gas valve, an air path in the vacuum cleaner between an airway to a fan the vacuum cleaner and an air path to the ambient air is switchable, wherein the clean gas valve is downstream of the separator and upstream of the blower, and that the clean gas valve in response to a pressure sensor supplied by the pressure sensor is controllable.
  • the vacuum cleaner with a clean gas valve and a raw gas valve can be blocked by the raw gas valve, the flow of raw gas into the separator. This ensures sufficient for a filter backwashing of the type outlined above negative pressure in the separator. A measurement of the actual negative pressure by means of a pressure sensor or the like is not necessary, but optionally possible.
  • the clean gas valve can be opened to the ambient air, in particular in such a way that the air path to the fan is blocked.
  • the negative pressure in the separator causes the flow reversal and the filter rinse.
  • a raw gas valve is not necessary, but nevertheless optionally possible.
  • the pressure sensor it is detected whether there is sufficient negative pressure in the separator for a filter rinse. This can result from the fact that a suction nozzle of a floor nozzle of the vacuum cleaner is blocked manually or that an aerodynamically dense floor covering is extracted. The closing of the suction mouth or the dense flooring act like a closed raw gas valve.
  • the clean gas valve can be activated so that it opens the air path in the vacuum cleaner to the ambient air, in particular in such a way that the air path to the air is released Blower is blocked.
  • the negative pressure in the separator then again causes the flow reversal and the filter rinse.
  • the filter rinse can be triggered manually or automatically.
  • a manual triggering of the filter rinse includes User of the vacuum cleaner first the raw gas valve to block the raw gas supply and to ensure in this way a sufficient negative pressure in the separator. Then, after a short wait, the user opens the clean gas valve, causing backwashing of the filter element. Then the user returns the two valves to their original position.
  • the filter flush can also be triggered automatically. For this purpose, a user actuates, for example, a control element provided for backwashing / regeneration of the filter element.
  • This operator action initiates automatic triggering of the filter rinse by first automatically closing the raw gas valve, then - after a certain predetermined or specifiable waiting time - also automatically opening the clean gas valve to the ambient air to trigger the filter rinse and finally the two valves automatically be put back in their original position.
  • the filter flushing can be fully automatic, for example, it is automatically triggered after the lapse of a predetermined or predetermined operating time of the vacuum cleaner.
  • the filter flush is normally triggered automatically, depending on the pressure reading provided by the pressure sensor.
  • the then automatically running process for automatic filter cleaning by reversing the flow direction is the method already described above.
  • the approach described here and below is especially suitable for household vacuum cleaners, but is in principle suitable for all vacuum cleaner types, including industrial vacuum cleaners. Furthermore, the approach described here is basically also for use in process plants, for example in systems for air extraction or the like, into consideration to clean filter elements used there.
  • the approach described here is especially for equipment or systems, ie in particular for vacuum cleaners and the like, in which the respective filter element acts as a surface filter, because dust and the like does not interfere with such surface filters in depth and thus particularly easy in a flow reversal and dropped efficiently can be. In the case of other filter elements, at least the dust which is also deposited there on the surface can be thrown off.
  • the advantage of the solution according to the invention is that when used in a vacuum cleaner this is not turned off for the regeneration of the filter element and thus a possible suction process must not be interrupted, that a mechanical load on the filter folds, as they are in a back cleaning by means of one of the filter folds abutting rotating scraper results, is completely avoided and that the re-cleaning process is very quiet overall, because only the switching of a valve or possibly two valves is acoustically effective. The same applies accordingly to other applications of the approach presented here.
  • a raw gas valve arranged upstream of the filter element is closed.
  • the exceeding of the threshold value due to a corresponding pressure drop across the filter element indicates a high degree of contamination of the filter element.
  • the filter rinse is then initiated by closing the raw gas valve and then opening the clean gas valve to the ambient air for filter rinsing.
  • a raw gas valve arranged upstream of the filter element is closed and subsequently the clean gas valve is opened in response to an exceeding of the threshold value to the ambient air.
  • the exceeding of the threshold value points to a sufficient negative pressure in the separator due to the blocked by means of the closed raw gas valve influx of raw gas into the separator.
  • the filter rinse can be initiated by opening the clean gas valve to the ambient air.
  • the clean gas valve is opened several times in succession for a predetermined period of time when the threshold value is exceeded.
  • the return cleaning of the filter element by filter rinsing then takes place by means of individual purge air pulses.
  • a swinging back and forth of the filter element or its filter medium is triggered. This leads to an even more efficient discharge of dust attached to the filter element.
  • the filter cleaning and the resulting regeneration of the filter element are particularly effective and efficient in this way.
  • the raw gas valve is closed before the clean gas valve is opened for the first time, and remains closed until the clean gas valve, after this was opened for the last time to the ambient air back into his Starting position is made.
  • the crude gas valve can also be opened and closed in a countercyclical manner in the event of a multiple successive opening of the clean gas valve.
  • the filter medium of the filter element is not only flowed through in multiple alternating directions, but the respective air pressure also causes a multiply changing deformation of the filter medium and thus a particularly effective discharge of attached dust.
  • a control device encompassed by the respective device, that is, for example, a vacuum cleaner, is considered.
  • This comprises, for example, a processing unit in the form of or in the manner of a microprocessor and a memory in which a control program executable by the processing unit is loaded, which when executed by the processing unit realizes all steps of the method.
  • the invention is preferably implemented in software.
  • the invention is thus on the one hand also a control program with by a computer system, namely the control device and its processing unit, executable program code instructions and on the other hand, a storage medium with such a control program, so a computer program product with program code means or other computer-executable instructions that are adapted to in a computer system cause the execution of a method as described here, and finally also a control device in whose memory such a control program is loaded or loadable as means for carrying out the method and its embodiments.
  • execution in software and hardware, firmware, software and firmware and so forth is also possible, for example by checking that the threshold value is exceeded by the respective pressure measurement by means of a comparator implemented in hardware ,
  • FIG. 1 shows in a simplified schematic representation of a section through a vacuum cleaner 10 in one embodiment as a vacuum cleaner, the following explained new approach for all types of vacuum cleaners 10 comes into consideration and is not limited to vacuum cleaner.
  • the vacuum cleaner 10 comprises in a conventional manner in a dust chamber 12 a separator 14 with a turn arranged in the separator 14 filter element 16.
  • the filter element 16 is in the illustration in FIG. 1 designed in the form of a filter cartridge and acts in the vacuum cleaner as a central filter.
  • raw gas 18 is sucked in a manner known per se and the dust 20 contained in the raw gas 18 is mainly deposited on the filter element 16.
  • the necessary flow air is generated in a conventional manner by means of a blower 22 and occurs through a suction hose 24, of which only one for connecting the suction hose 24 provided on the vacuum cleaner 10 connecting piece 24 is shown in the vacuum cleaner 10 a.
  • the purified by means of the filter element 16 raw gas 18 leaves the vacuum cleaner 10 as a clean gas 26 through an optional engine filter 28th
  • FIG. 2A shows the filter element 16 FIG. 1 in a simplified schematic, enlarged and sectioned side view.
  • FIG. 2B shows the same filter element 16 in a simplified and sectional top view.
  • the filter element 16 comprises a folded / pleated filter medium 30 which can be cleaned by means of a rotatable scraper 32 functioning as a cleaning mechanism, as described, for example, in US Pat WO 2011/12479 A is described.
  • the scraper 32 is usually operated by means of an electric motor (not shown) and set in rotation.
  • the scraper 32 is integrally formed on an axle 34 which is rotatably mounted in a filter cover 36 and a filter bottom 38 of the filter element 16.
  • this filter folds 40 Due to the folding / pleating of the filter medium 30, this filter folds 40, in which the scraper 32 engages.
  • the filter folds 40 are deformed and - in analogy to the plucking of a guitar string - vibrated.
  • deposited dust 20 (FIG. FIG. 1 ) dropped from the filter folds 40.
  • the deformation of the filter folds 40 represents a mechanical load of the filter medium 30, so that long-term damage to the filter medium 30 are not excluded.
  • the vacuum cleaner 10 must be turned off when the cleaning mechanism is activated, so that the discarded dust 20 is not sucked back to the filter element 16, so that the user must perform appropriate operations and, if necessary, interrupt the suction process.
  • FIG. 3A and Figure 3B illustrate an alternative and also, namely in industrial vacuum cleaners, (for example from the DE 10 2009 029 518 A
  • This approach is based on a supply of scavenging air 44.
  • a purge air opening acting clean gas valve 46 which is downstream of the dust chamber 12, so pure side behind the dust chamber 12, arranged scavenging air 44, so ambient air , supplied against the flow direction of the raw and clean gas 18, 26, to free the filter element 16 from the dust 20.
  • this is a filter backwash.
  • suction operation in the dust chamber 12, in the suction hose 24 and in a respective attachment (not shown) from the blower 22 ( FIG. 1 ) generated negative pressure.
  • the clean gas valve 46 By opening the clean gas valve 46, for example, the dust chamber 12 is purged for a few 100 milliseconds 44 supplied and thereby increases the air pressure in the dust chamber 12. This leads to the fact that the flow reverses abruptly through the filter element 16.
  • the case of industrial vacuum cleaners usually very large dust chamber 12, for example, about 30 liters acts as an accumulator. The larger the accumulator is and the faster the clean gas valve 46 is opened and closed, the more intense is the cleaning of the filter element 16.
  • FIG. 1 a vacuum cleaner 10 in the form of a household vacuum cleaner, so a canister vacuum cleaner, a vacuum cleaner or a hand or table vacuum cleaner, a cleaning of a covered by the vacuum cleaner 10 filter element 16 can achieve by means of filter rinse.
  • FIG. 4 shows in a simplified schematic form the air flow in a vacuum cleaner 10.
  • the flow path begins in the illustration on the far left with the there through the suction hose 24 (FIG. FIG. 1 ) incoming raw gas 18, which enters the separator 14 (or generally in a dust chamber 12) and exits the filter element 16 as a clean gas 26.
  • the vacuum required for this purpose is generated by means of a blower 22 and to that extent is the presentation in FIG. 1 and the explanations made there reference.
  • vacuum cleaner 10 are located in the flow path two valves, namely a clean gas valve 46 / clean gas valve 46 and a Rohgas workedes valve 48 / Rohgasventil 48.
  • the raw gas valve 48 is located in the flow path upstream of the separator 14 (or in a vacuum cleaner 10 without separator 14 upstream of the dust chamber).
  • the clean gas valve 46 is located in the flow path downstream of the separator 14 (or in a vacuum cleaner 10 without separator 14 downstream of the dust chamber 12), in the embodiment shown immediately downstream of the separator 14. Die Both valves 46, 48 are therefore also fluidly in front of and behind the arranged in the separator 14 filter element 16 or generally in front of and behind the arranged in the dust chamber 12 filter element 16th
  • the raw gas valve 48 serves to close the flow path leading to the separator 14 / dust chamber 12.
  • the crude gas valve 48 can therefore be designed as a one-way valve.
  • the clean gas valve 46 is designed as a two-way valve and by means of the clean gas valve 46th Either the flow path to the blower 22 or a flow path for introducing purging air 44 into the separator 14 / dust chamber 12 is released. By closing the crude gas-side flow path by means of the crude gas valve 48, the maximum negative pressure of the blower 22 is built up in the separator 14 / dust chamber 12.
  • the crude gas valve 48 is closed and then briefly or once the clean gas valve 46 is opened, so that due to the negative pressure in the separator 14 purge air 44 flows into the inner volume of the separator 14, namely in the inner volume of the separator 14 is sucked.
  • the scavenging air 44 sucked in the way of the pressure compensation taking place in such a way flows through the filter element 16 in a direction opposite to the flow direction of the raw and clean gases 18, 26, so that a backwashing of the filter element 16 (filter backwashing) is achieved.
  • This filter rinse or filter backwash is also referred to as backwashing the filter element 16.
  • the dust 20 deposited on the surface of the filter medium 30 of the filter element 16 is discarded.
  • the filter medium 30 is thus regenerated or at least regenerated to a large extent.
  • the back cleaning of the filter element 16 can also be triggered automatically.
  • an otherwise optional analog pressure sensor 50 or a pressure switch 50 is arranged, which detects the respective pressure loss across the filter element 16 as a measure of its degree of contamination.
  • the negative pressure measured by the pressure sensor 50 is monitored. If a pressure measured value (negative pressure measured value) supplied by the pressure sensor 50 exceeds a predetermined or predefinable threshold value, the raw gas 18 is initially separated from the separator 14 automatically by a corresponding control of the raw gas valve 48. As a result, the maximum fan negative pressure is built up in the separator 14. After a predetermined or predefinable period of time, the lapse of which is awaited after the activation of the raw gas valve 48, for example a time interval in the order of about one second, the purging air 44 is switched on via a corresponding activation of the clean gas valve 46.
  • connection of the purge air 44 by means of a corresponding control of the clean gas valve 46 also takes place for a predetermined or predefinable period of time (backwash) and possibly several times in succession, between each one control of the clean gas valve 46 for switching on the scavenging air 44 a predetermined or predetermined interval time is awaited.
  • backwash a predetermined or predefinable period of time
  • the crude gas valve 48 is automatically opened again by a corresponding control.
  • FIG. 5A and FIG. 5B show the schematically simplified representation of a vacuum cleaner 10 in FIG. 4 with symbols of electrical engineering. Accordingly, there are the two valves 48, 46 shown as a switch.
  • the method described above ie the monitoring of the pressure measurement value of the pressure sensor 50, the closing of the raw gas valve 48 when the threshold value is exceeded, the subsequent and possibly multiple short-term opening of the clean gas valve 46 and the final closing of the raw gas valve 48 are controlled by a control device 52 provided for this purpose.
  • This may be a separate control device 52, but also a device provided for controlling and / or monitoring other functions of the vacuum cleaner 10 or a functionality within such a device.
  • the crude gas valve 48 may be permanently closed during the backwashing or each anticyclically with the opening of the clean gas valve 46 for switching on the scavenging air 44 in the meantime each short-term reopened. This is also done automatically by means of a corresponding activation of the valves 48, 46 by means of the control device 52.
  • FIG. 5A shows with the valves 48, 46 shown there in the form of switches the situation during normal suction, so if the raw gas 18 via the open Rohgasventil 48 and exiting at the output of the filter element 16 clean gas 26 due to the blower 22 open toward the clean gas valve 46 finally the Stausauger 10 leaves again.
  • FIG. 5B shows with the there also shown in the form of switches valves 48, 46, the automatic control of the valves 48, 46 by means of the control device 52 due to an evaluated by means of the control device 52 and previously under control of the control device 52 at the pressure sensor 50 detected pressure reading.
  • the control is illustrated by the two block arrows.
  • the switching position shown by the solid lines corresponds to the in FIG. 5A shown situation.
  • the switching position shown with dotted lines is activated during backwashing of the filter element 16.
  • a processing unit 54 in the form of or a kind of microprocessor and a memory 56 includes.
  • a control program 58 executable by the processing unit 54, which, when executed by the processing unit 54, implements all the steps of the respective process for back-cleaning the filter element 16.
  • This detailed representation of the control device 52 is not repeated in the following figures for reasons of clarity, but also applies there.
  • a measure for a predetermined or specifiable waiting time between a control of the raw gas valve 48 and a (first) control of the clean gas valve 46 is stored, for example, in a designated memory location. The same applies to all other times and parameters that are taken into account in the context of the procedure.
  • FIG. 6 shows a specific embodiment of a vacuum cleaner 10 according to the approach proposed here.
  • its control by means of the control device 52 is carried out automatically and in dependence on a each with a header, for example a floor nozzle 62, vacuumed floor covering 64, 66 and depending on the degree of contamination of the filter element 16.
  • the floor covering 64, 66 and the degree of contamination of the filter element sixteenth are detected by the pressure sensor 50. This is at the in FIG. 6 embodiment shown executed as an absolute value sensor.
  • the floor covering 64, 66 may be in the form of smooth floor or carpet.
  • the operating point designated by P3 symbolizes the suction on a smooth floor with a new or regenerated filter element 16
  • the operating point designated P1 shows the aerodynamic conditions in carpet and new or cleaned filter element 16
  • the operating point denoted by P2 shows the state with saturated / dirty filter element 16 and sucking on carpet.
  • An aerodynamic tightness of a system comprising the one hand, the vacuum cleaner 10 and the other hand, the flooring 64, 66 depends mainly on the aerodynamic tightness of the floor covering 64, 66 from.
  • the dense pile of a carpet thus leads in comparison to a smooth floor to a significantly higher aerodynamic tightness of the entire system.
  • a higher aerodynamic tightness also results in a higher negative pressure in the system.
  • a higher aerodynamic tightness is accompanied by a correspondingly smaller volume flow q.
  • FIGS. 8A and 8B The method according to which the vacuum cleaner 10 in FIG. 6 works to clean the filter element 16, is in FIGS. 8A and 8B shown, with the clean gas valve 46 again (see. FIGS. 5A, 5B ) is shown as a changeover switch to illustrate the switching between the airway to the blower 22 during normal suction operation and the airway for introducing purging air 44 during backwashing of the filter element 16.
  • the switching of the clean gas valve 46 by means of the control device 52 is due to the size ⁇ p2. If it is detected by means of a pressure measurement value supplied by pressure sensor 50 that when cleaning a carpet or an aerodynamically very dense floor covering a threshold determined by the size .DELTA.p2 is reached or exceeded, the clean gas valve 46 is opened by appropriate control by means of the control device 52. Then purge air 44 flows into the separator 14 and by the thus effected backwashing of the filter element 16, this is regenerated.
  • the representation in Figure 8A shows a situation with raised floor nozzle 62. In this situation, there can not normally be any exceeding of the above threshold.
  • the representation in FIG. 8B shows at the same floor covering 66, namely an aerodynamically dense floor covering 66, for example, carpet floor, the situation with lying on the floor covering 66 floor nozzle 62. Due to the aerodynamic tightness of the floor covering 66 acts as a closing of the suction mouth of the floor nozzle 62, so ultimately as a closing a valve (see above: raw gas valve 48; FIG. 4 ) in the air path to the filter element 16 and the volume flow q to the filter element 16 collapses. In the separator 14 so that after a very short time the maximum negative pressure of the blower 22 is established.
  • the clean gas valve 46 is controlled so that it opens to the ambient air and allows the influx of purging air 44, the negative pressure in the separator 14 is compensated by the inflowing scavenging air 44 while the filter element 16 as above already described by backwashing.

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

Claims (11)

  1. Procédé de fonctionnement d'un aspirateur (10) destiné au rétro-nettoyage d'un élément filtrant (16) contenu dans l'aspirateur (10) pendant le fonctionnement de l'aspirateur (10),
    une valeur de mesure de pression d'un capteur de pression (50) associé à un volume (12, 14) dans lequel se trouve l'élément filtrant (16) étant détectée et comparée à une valeur de seuil et une soupape de gaz propre (46), disposée en aval de l'élément filtrant (16), étant ouverte à l'air environnant en cas de dépassement de la valeur de seuil, caractérisé en ce que une soupape de gaz brut (48), disposée en amont de l'élément filtrant (16), est fermée et en ce que la soupape de gaz propre (46) est ensuite ouverte à l'air environnant en cas de dépassement de la valeur de seuil.
  2. Procédé selon la revendication 1, dans lequel une soupape de gaz brut (48), disposée en amont de l'élément filtrant (16), est fermée en cas de dépassement de la valeur de seuil avant l'ouverture de la soupape de gaz propre (46).
  3. Procédé selon la revendication 1 ou 2, dans lequel la soupape de gaz propre (46) est ouverte plusieurs fois de suite à chaque fois pendant un intervalle de temps prédéterminé en cas de dépassement de la valeur de seuil.
  4. Procédé selon la revendication 1, 2 ou 3, dans lequel la soupape de gaz brut (48) est fermée avant que la soupape de gaz propre (46) ne soit ouverte pour la première fois et reste fermée jusqu'à ce que la soupape de gaz propre (46) soit refermée après avoir été ouverte une dernière fois.
  5. Procédé selon la revendication 2, dans lequel la soupape de gaz brut (48) est également ouverte et fermée de manière anti-cyclique lorsque l'ouverture de la soupape de gaz propre (46) a été effectuée plusieurs fois de suite.
  6. Aspirateur (10) comprenant un élément filtrant (16) dans un volume (12, 14) entourant l'élément filtrant (16), une soupape de gaz propre (46) se trouvant en aval du volume (12, 14) contenant l'élément filtrant (16) et en amont de la soufflante (22), une commutation pouvant être effectuée au moyen de la soupape de gaz propre (46) entre un passage d'air dans l'aspirateur (10) allant vers une soufflante (22) de l'aspirateur (10) et un passage d'air allant vers l'air environnant,
    caractérisé par
    une soupape de gaz brut (48), un afflux de gaz brut (18) dans le volume (12, 14) pouvant être bloqué au moyen de la soupape de gaz brut (48) pendant que l'aspirateur (10) aspire de sorte que la soupape de gaz brut (48) se trouve en amont du volume (12, 14) contenant l'élément filtrant (16).
  7. Aspirateur (10) selon la revendication 6 comprenant un capteur de pression (50),
    la soupape de gaz propre (46) pouvant être commandée en fonction de la valeur de mesure de pression délivrée par le capteur de pression (50).
  8. Aspirateur (10) selon la revendication 6 comprenant un capteur de pression (50),
    la soupape de gaz propre (46) et la soupape de gaz brut (48) pouvant être commandées en fonction de la valeur de mesure de pression délivrée par le capteur de pression (50).
  9. Aspirateur (10) selon la revendication 8 comprenant des moyens (46, 48, 50, 52) destinés à mettre en oeuvre un procédé selon l'une des revendications 1 à 5.
  10. Aspirateur (10) selon la revendication 9, comprenant un dispositif de commande (52) utilisé comme l'un des moyens pour mettre en oeuvre le procédé selon l'une quelconque des revendications 1 à 5,
    le moyen de commande (52) comportant dans une mémoire (56) un programme de commande (58) qui réalise lors de son exécution toutes les étapes du procédé selon l'une des revendications 1 à 6 et
    une mesure étant mémorisée à un premier emplacement de mémoire dans la mémoire (56) pendant un temps d'attente prédéterminé ou prédéterminable entre une commande de la soupape de gaz brut (48) et une commande de la soupape de gaz propre (46).
  11. Aspirateur (10) selon la revendication 10, dans lequel la mémoire (56) mémorise à un deuxième emplacement de mémoire une valeur numérique pour un nombre prédéterminée ou prédéterminable de processus de commutation consécutifs de la soupape de gaz propre (46), à un troisième emplacement de mémoire une mesure pendant une durée prédéterminée ou prédéterminable de l'ouverture de la soupape de gaz propre (46) vers l'air environnant et à un quatrième emplacement de mémoire une mesure pendant un temps d'attente prédéterminé ou prédéterminable entre deux processus de commutation de la soupape de gaz propre (46).
EP14180192.8A 2013-08-08 2014-08-07 Procédé de fonctionnement d'un aspirateur pour le nettoyage d'un élément de filtre enfermé dans l'aspirateur Active EP2835089B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013108559.8A DE102013108559A1 (de) 2013-08-08 2013-08-08 Verfahren zum Betrieb eines Staubsaugers zum Rückreinigen eines vom Staubsauger umfassten Filterelements

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EP2835089A2 EP2835089A2 (fr) 2015-02-11
EP2835089A3 EP2835089A3 (fr) 2015-08-19
EP2835089B1 true EP2835089B1 (fr) 2018-06-27

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016100780A1 (de) 2016-01-19 2017-07-20 Festool Gmbh Sauggerät
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
DE102019117920A1 (de) 2019-07-03 2021-01-07 Alfred Kärcher SE & Co. KG Saugvorrichtung und Verfahren zur Abreinigung eines Filters
EP3888516A1 (fr) * 2020-04-01 2021-10-06 Hilti Aktiengesellschaft Nettoyage du filtre en fonction des besoins
EP4223199A1 (fr) * 2022-02-02 2023-08-09 Nilfisk A/S Procédé d'ajustement de performance sous vide

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Publication number Priority date Publication date Assignee Title
DE1245550B (de) * 1964-04-10 1967-07-27 Siemens Elektrogeraete Gmbh Verfahren und Vorrichtung zur Reinigung eines Staubsaugerfilters
DE29823411U1 (de) * 1998-05-08 1999-05-20 Kaercher Gmbh & Co Alfred Sauggerät für Reinigungszwecke
DE102005017568B4 (de) * 2005-04-11 2024-04-25 Alfred Kärcher SE & Co. KG Saugreinigungsgerät
DE102009035602A1 (de) 2009-07-31 2011-02-10 BSH Bosch und Siemens Hausgeräte GmbH Staubsauger mit Filter
DE102009029518A1 (de) 2009-09-16 2011-03-24 Robert Bosch Gmbh Anordnung und Verfahren zum Betreiben einer Abgasnachbehandlungsvorrichtung
DE102010029518A1 (de) 2010-05-31 2011-12-01 Alfred Kärcher Gmbh & Co. Kg Staubsauger
RU2532017C1 (ru) * 2011-02-11 2014-10-27 Альфред Кэрхер Гмбх Унд Ко. Кг Способ очистки фильтра пылесоса, а также пылесос для осуществления способа
DE102011015574B4 (de) * 2011-03-30 2022-11-24 Festool Gmbh Sauggerät mit einem Motorsensor

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EP2835089A3 (fr) 2015-08-19
EP2835089A2 (fr) 2015-02-11

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