EP2575587B1 - Aspirateur avec nettoyage de filtre par contre-courant - Google Patents

Aspirateur avec nettoyage de filtre par contre-courant Download PDF

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Publication number
EP2575587B1
EP2575587B1 EP11722785.0A EP11722785A EP2575587B1 EP 2575587 B1 EP2575587 B1 EP 2575587B1 EP 11722785 A EP11722785 A EP 11722785A EP 2575587 B1 EP2575587 B1 EP 2575587B1
Authority
EP
European Patent Office
Prior art keywords
suction
vacuum cleaner
closing body
accordance
closing 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.)
Not-in-force
Application number
EP11722785.0A
Other languages
German (de)
English (en)
Other versions
EP2575587A1 (fr
Inventor
Felix Treitz
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.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
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 Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP2575587A1 publication Critical patent/EP2575587A1/fr
Application granted granted Critical
Publication of EP2575587B1 publication Critical patent/EP2575587B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/20—Means for cleaning filters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/36—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back
    • A47L5/365—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back of the vertical type, e.g. tank or bucket type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/12—Dry filters
    • A47L9/122—Dry filters flat

Definitions

  • the invention relates to a vacuum cleaner with the features of the preamble of claim 1.
  • the vacuum cleaner has at least one filter which is arranged in the flow path between the dirt collecting container and the suction unit. At the side of the at least one filter facing the dirt collecting container, dirt particles gradually accumulate during the suction operation of the vacuum cleaner. It is therefore necessary to clean off the at least one filter from time to time, since otherwise the suction flow generated by the suction unit in the region of the filter experiences a strong pressure loss, so that an effective suction operation of the vacuum cleaner is no longer guaranteed.
  • the at least one filter can be charged with purging air.
  • the vacuum cleaner on a scavenging air supply means for supplying scavenging air into the suction downstream of the filter.
  • the scavenging air supply device comprises at least one scavenging air opening, which is in flow communication with the suction line.
  • the scavenging air opening can optionally be closed and released by means of a closing body.
  • the closing body has an end side facing the suction line and a rear side facing away from the suction line. In its closed position, the closing body closes the scavenging air opening and in its release position, the closing body releases the scavenging air opening. It can be moved back and forth between the closed position and the release position.
  • the closing body During normal suction operation of the vacuum cleaner, the closing body assumes its closed position. To clean the filter, the closing body is moved to the release position. In the release position, scavenging air can flow into the suction line and act on the side of the at least one filter remote from the dirt collecting container. This mechanically shakes the filter. At least part of the inflowing purging air can flow through the at least one filter in the counterflow direction, that is to say counter to the direction of the suction flow prevailing during normal suction operation. Adhesive particles adhering to the filter are detached by the mechanical vibration of the filter caused by the scavenging air and by the scavenging air flowing through the filter in the countercurrent direction.
  • a vacuum cleaner whose filter can be subjected to cleaning in countercurrent direction with external air is from the published patent application WO 97/19630 A1 known.
  • the vacuum cleaner described therein comprises a scavenging air supply device with a tubular housing, in which a sleeve-shaped closing body is manually displaceable in the longitudinal direction against the action of a return spring.
  • the closing body has side openings in a similar manner as the tubular housing.
  • the lateral openings of the closing body can be aligned in a release position in alignment with the scavenging air openings of the housing, so that scavenging air can flow via the scavenging air openings and the sleeve-shaped closing body into the area of the suction line downstream of the filter for cleaning the filter.
  • the closing body assumes a closed position, in which its lateral openings are arranged axially offset from the scavenging air openings and thus the flow connection between the scavenging air openings and the suction line is interrupted.
  • the transition of the closing body from its closed position in the release position takes place in that it is moved by the user of the vacuum cleaner coaxially with the longitudinal axis of the housing of the scavenging air supply.
  • the filter can be applied for cleaning in countercurrent direction with purge air.
  • the purge air supply device used for this purpose comprises a hood-shaped closing body whose rear side facing away from the suction line is exposed to atmospheric pressure and on whose end face facing the suction line the pressure prevailing in the suction line acts. With the aid of a permanent magnet, the closing body is held in its closed position. For filter cleaning, the prevailing at the end of the closing body vacuum is increased. This has the consequence that the closing body is displaced against the magnetic holding force acting on it in the direction facing the filter. In doing so, he releases the purging air opening, so that purging air can act on the filter in the countercurrent direction.
  • the purge air supply means comprises a plate-shaped closing body which is held by means of an electromagnet in its closed position. After switching off the exciting current of the electromagnet of the closing body is due to the rear side acting on it atmospheric pressure in its release position, by being moved in the direction of the filter facing.
  • a vacuum cleaner is known with a dirt collecting container having a suction inlet and is connected via a filter and a suction with a suction unit in flow communication.
  • the suction line has an opening which can be closed on the inside by a pivotable valve flap. Purge air can flow into the suction line via the opening of the suction line for cleaning the filter.
  • the valve flap has an end face facing the opening and a rear side facing the interior of the suction line. The back can be in a closed position of the valve flap, in which this the opening the suction line closes, are acted upon by the prevailing pressure in the suction line.
  • the valve flap can be pivoted into the interior of the suction, wherein it is acted upon by the pivoting movement of a spring with a restoring force.
  • a vacuum cleaner in which in addition to a filter, which can be traversed by the suction air, a cyclone is used for the separation of dirt particles from the suction air.
  • a suction line Downstream of the filter, a suction line has a scavenging air opening, which can be closed by a closing body and which can be released from the closing body for filter cleaning.
  • the closing body is pressed by a spring in its closed position.
  • a user can operate a flap valve, so that no suction air can flow into the dirt container of the vacuum cleaner.
  • an increasing negative pressure is formed, which also acts on the filter-facing side of the closing body. Due to the application of the negative pressure, the closing body moves into its release position, in which it releases the purging air opening, so that purging air can flow into the suction line and act on the filter in the counterflow direction.
  • a dust filter device in which a tubular filter is held in a housing and can be traversed by suction air.
  • a valve located downstream of the filter can be opened by means of an electromagnet.
  • pressurized purging air can flow into a suction line arranged downstream of the filter and act on the filter in the counterflow direction.
  • Object of the present invention is to develop a vacuum cleaner of the type mentioned in such a way that it enables effective cleaning of the at least one filter with low production costs.
  • the transition of the closing body from its closed position to its release position is characterized in that the closing body is acted upon on its back with negative pressure, under the action of which it is movable against an acting restoring force in its release position.
  • an effective filter cleaning can be achieved in a structurally simple manner.
  • the closing body in which the closing body assumes its closed position, can act on the back of a pressure which is greater than the prevailing pressure in the suction line, for example atmospheric pressure, whereas its end facing the filter also in the suction line downstream of the filter prevailing pressure acts.
  • the closing body is thereby reliably held in its closed position, without additional retaining elements must be used.
  • the transition of the closing body of the closed position in its release position is effected in that the rear side of the closing body is subjected to negative pressure. Under the effect of the negative pressure, the closing body can be moved in the direction away from the filter, so that it releases the purging air opening and purging air can flow into the suction line.
  • the rear side of the closing body can be brought into fluid communication with the suction unit for applying negative pressure, the area of the rear side of the closing body which can be acted upon by negative pressure being greater than the area of the end face of the closing body which can be acted upon by the pressure prevailing in the suction line.
  • a flow connection is made between the suction unit and the back of the closing body, so that the closing body can be acted upon at the back with the vacuum provided by the suction unit.
  • On the front side of the closing body of the prevailing downstream of the filter negative pressure of the suction which is also in communication with the suction unit acts. Thus acts at the transition of the closing body from the closed position to the release position both the front side and a negative pressure at the back.
  • the closing body is configured such that the area of the closing body which can be acted upon with negative pressure on the rear side is greater than the area of the closing body which can be subjected to negative pressure on the front side.
  • the area differences ensure that the closing body reliably passes into its release position due to the back-loading with negative pressure. This then has the consequence that purging air can flow into the suction line downstream of the filter via the at least one purging air opening and the filter can flow through in the countercurrent direction.
  • the scavenging air flowing into the suction line increases the pressure in the suction line and this in turn supports the transition of the closing body from its closed position into its release position, since the vacuum generated by the suction unit acts on the rear side of the closing body at this time. If the closing body, after the filter has been cleaned, should return to its closed position, it is only necessary to interrupt the flow connection between the suction unit and the rear side of the closing body. As a result, the pressure acting in the rear on the closing body can increase, whereas the pressure in the suction line downstream of the filter, which also acts on the closing body on the front side, is reduced due to the continued operation of the suction unit. The pressure difference acting on the closing body is thus directed again in the direction of its closed position, so that the closing body assumes its closed position and the normal suction operation of the vacuum cleaner can be continued.
  • the scavenging air supply device has a housing in which the closing body is movably held, wherein it delimits a pressure chamber of the housing, which can be brought into fluid communication with the suction unit via a connecting device.
  • the housing of the scavenging air supply device in combination with the closing body movably held in the housing defines a pressure chamber.
  • the pressure prevailing in the pressure chamber, the back on acts in combination with the end face acting on the closing body pressure of the suction line determines the position occupied by the closing body the closing body.
  • a higher pressure can prevail in the pressure chamber than in the suction line, in particular atmospheric pressure.
  • the pressure chamber via a connecting device with the suction unit is brought into flow communication, so that the pressure chamber is sucked from the suction unit and thereby the back acting on the closing body pressure is reduced.
  • This then has the consequence that the closing body transitions into its release position and purging air can flow into the suction line downstream of the filter via the at least one purging air opening in order to flow through the filter in the counterflow direction.
  • a suction hose which is connected at one end to the suction inlet of the dirt collecting and the other end can be brought into flow communication with the pressure chamber.
  • a suction hose is connected to the suction inlet of the dirt collecting container, which can carry a suction nozzle, for example a floor nozzle or a crevice nozzle, at its free end facing away from the dirt collecting container. If a filter cleaning to be triggered, it is only necessary for this that the free end of the suction hose is brought into flow communication with the pressure chamber.
  • the pressure chamber has a suction connection, for example a suction connection, which can be detachably connected to the free end of the suction hose or a suction nozzle mounted on the free end of the suction hose. It can be provided, for example, that the free end of the suction hose can be inserted into a suction nozzle or placed on a suction nozzle, which opens into the pressure chamber.
  • the flow connection between the pressure chamber and the suction unit is produced via the suction hose and the dirt collecting container of the vacuum cleaner.
  • the connecting device has a connecting line which connects the suction line to the pressure chamber, wherein in the connecting line an actuatable blocking element is connected for selectively opening and closing the connecting line.
  • the closing body can be acted upon at the back with negative pressure by the User releases a connection line between the suction line and the pressure chamber.
  • it can actuate a shut-off member, which is connected in the connecting line, so that the flow connection between the suction line and the pressure chamber is released via the connecting line.
  • the back of the closing body can be acted upon by the connection line and the pressure chamber with negative pressure.
  • a throttle element is connected in the connecting line.
  • the throttle element ensures that at the transition of the closing body in its release position which takes place by the influx of purging air pressure increase in the suction downstream of the filter acts only with a time delay via the connecting line in the pressure chamber and thus on the back of the closing body. If the closing body releases the at least one purging air opening, the pressure in the suction line and thus also the pressure in the pressure chamber increase via the connecting line.
  • a throttling element is connected in the connecting line, the pressure in the pressure chamber increases more slowly than in the suction line, so that the closing body initially remains in its release position despite the existing over the connecting line flow connection between the pressure chamber and the suction and the filter accordingly can be effectively cleaned.
  • pressure equalization occurs between the pressure chamber and the suction line. This has the consequence that the closing body passes into its closed position due to the restoring force acting on it, in which it closes the at least one scavenging air opening.
  • the connecting device comprises a valve which connects the pressure chamber with the environment of the vacuum cleaner in a first valve position and connects the pressure chamber with the suction unit in a second valve position.
  • the valve can be operated by the user. During the normal Suction operation, the valve assumes its first valve position, in which it provides a flow connection between the pressure chamber and the surroundings of the suction unit, so that the back of the closing body can be acted upon with atmospheric pressure.
  • the user can operate the valve so that it assumes its second valve position, in which it establishes a flow connection between the pressure chamber and the suction unit. As a result, the pressure in the pressure chamber is lowered and the closing body can pass into its release position.
  • the valve can be operated again so that it again assumes its first valve position and releases the flow connection between the pressure chamber and the surroundings of the vacuum cleaner.
  • valve is connected in the connecting line, via which the pressure chamber is connected to the suction line, as has already been explained above.
  • the valve can assume the function of the shut-off in such an embodiment.
  • the housing of the scavenging air supply device has a housing wall, on which the closing body is movably supported with the interposition of a sealing device.
  • the sealing device can be designed as a gap seal, in which the closing body and the housing wall each form a gap surface, which are arranged at the smallest possible distance from each other. The smaller the distance between the gap surfaces and the longer the gap formed between them, the greater the sealing effect achievable by means of the gap seal.
  • the sealing device has a sealing ring and an associated sealing surface.
  • the sealing ring may be configured, for example, in the form of a piston ring, which is arranged in an annular groove of the closing body and slidably abuts against a sealing wall arranged on the housing wall.
  • the closing body is preferably designed as a piston, which is held displaceably in the housing.
  • the piston comprises a cylindrical piston wall which slidably bears against a cylindrical housing wall with the interposition of a sealing device.
  • the sealing device arranged between the housing wall and the closing body has a membrane via which the closing body is connected to the housing wall.
  • the membrane allows a reliable sealing of the closing body relative to the housing of the scavenging air supply device, wherein the closing body, however, can be moved back and forth between the closed position and the release position.
  • the membrane is integrally connected to a sealing ring fixed to the closing body, which in the closed position of the closing body sealingly against a surrounding the scavenging air sealing surface, which is preferably designed as a sealing edge, can be applied.
  • the closing body is formed plate-shaped in the preferred embodiment.
  • the closing body In order to avoid that the closing body canted in its movement between the closed position and the release position, it is advantageous if the closing body is guided displaceably in a guide member.
  • the closing body is positively connected to the guide member.
  • the guide part has a guide sleeve into which the closing body dips with a guide pin.
  • the closing body including the guide pin, is configured in the form of a one-piece component.
  • the manufacturing and assembly costs can be further reduced.
  • the closing body is in the closed position at an edge of the scavenging air opening sealingly and outside the edge of the scavenging air at the front can be acted upon by a pressure which is higher than the prevailing during the suction in the suction pressure, for example atmospheric pressure ,
  • the end face of the closing body is divided in the closed position into a first area and a second area. The subdivision is effected by the edge of the scavenging air opening, against which the closing body bears in a sealing manner.
  • the first region of the end face covers the scavenging air opening, and the second region of the end face is arranged outside the edge of the scavenging air opening.
  • the first area is acted upon by the negative pressure prevailing in the suction line, whereas the second area of the front side can be acted on with a higher pressure.
  • the pressure prevailing in the second region of the end face assists the movement of the closing body, starting from its closed position in its release position, so that the closing body abruptly assumes its release position.
  • the subdivision of the end face of the closing body into a first area, which is acted upon by the pressure prevailing in the suction line downstream of the filter, and a second area, which can be acted upon with a higher pressure thus leads to a particularly rapid transition of the closing body from the closed position in its release position.
  • Purging air can act on the filter to be cleaned impulsively, so that the filter undergoes a particularly strong mechanical shock and thus cleaned very effectively.
  • the housing of the scavenging air supply device has a scavenging air channel which is connected to the scavenging line via the scavenging air opening, wherein the scavenging air channel surrounds the scavenging air opening in the circumferential direction.
  • About the scavenging air duct arranged outside the edge of the scavenging air opening frontal region of the closing body can be acted upon, for example, with atmospheric pressure. If the closing body moves into its release position, then the scavenging air can flow into the suction channel downstream of the filter via the scavenging air channel and the scavenging air opening then released by the closing body and flow through the filter in the countercurrent direction.
  • FIG. 1 shows a schematic partial sectional view of a first embodiment of a vacuum cleaner according to the invention with a dirt collecting container 10, which has a suction inlet 12 and a suction outlet 14.
  • the suction outlet 14 is covered within the dirt collecting container 10 by a filter 16.
  • a suction line 18 connects.
  • the suction line 18 is in FIG. 1 only partially shown. It connects the dirt collecting 10 with a known per se and therefore not shown in the drawing suction unit, by means of which the suction line 18 and the dirt collecting container 10 is subjected to negative pressure can be.
  • a suction hose 20 is connected, which in FIG.
  • the suction inlet 12 remote end carries an angled pipe section 22 to which a conventional suction nozzle can be connected in a conventional manner.
  • a suction flow forms, so that dirt and liquid can be sucked into the dirt collecting container 10 via the suction hose 20.
  • Suction air then flows through the filter 16 and entrained dirt and liquid droplets are deposited on the filter 16.
  • the suction flow is in FIG. 1 illustrated by the arrows 24.
  • a scavenging air supply device 26 is arranged with a housing 28, which forms a scavenging air duct 30 which is in flow connection via a scavenging air opening 32 with the suction line 18, and coaxial with the scavenging air opening 32 comprises a cylindrical housing upper part 34 with a top wall 36. Inside is formed on the ceiling wall 36, a spring holder in the form of a holding pin 38 and radially offset from the centrally aligned holding pin 38, the top wall 36 has a suction port 40, to the outside of a pipe socket 42 connects.
  • a closing body 44 is arranged, which is formed in the form of a stepped piston. It has a filter 12 facing the lower piston portion 46, which dips into the scavenging air opening 32, wherein it occupies a distance from the edge 48 of the scavenging air opening 32.
  • the lower piston section 46 merges via a radial extension 50 into an upper piston section 52.
  • the upper piston portion 52 slides with the interposition of a sealing ring 54 along an inner side sealing surface of a cylinder wall 56 of the upper housing part 34 along.
  • the closing body 44 in the housing 28 defines a pressure chamber 58, which can be acted upon by the suction connection 40 with negative pressure. This will be explained in more detail below.
  • the retaining pin 38 is surrounded by a helical return spring 60, which is supported on the one hand on the inside of the top wall 36 and on the other hand on the back 62 of the closing body 44 and thereby acts on the closing body 44 directed to the filter 16 resilient restoring force.
  • the edge 48 of the scavenging air opening 32 has, on its upper side facing away from the suction line 18, a collar-shaped sealing edge 76.
  • the sealing edge 76 forms a sealing surface, which cooperates with a sealing ring 78, which is arranged on the radial extension 50 of the closing body 44.
  • the closing body 44 can between a in FIG. 1 illustrated closed position in which the sealing ring 78 bears sealingly against the sealing edge 76, so that the scavenging air opening 32 is closed, and a release position, not shown in the drawing, in which the closing body 44 is displaced in the direction away from the filter 16, so that the sealing ring 78 occupies a distance from the sealing edge 76 and thereby the scavenging air opening 32 is released, are moved back and forth.
  • the closing body 44 assumes during the normal suction operation of the vacuum cleaner.
  • the dirt collecting container 10 is acted upon by the suction line 18 from the suction unit, not shown in the drawing, with negative pressure and the free end of the suction hose 20 may be on a surface to be sucked be guided along, so that dirt particles and liquid can be sucked through the suction hose 20 in the dirt collecting 10.
  • entrained dirt particles and liquid droplets are deposited on the filter 16 by the suction flow.
  • there is atmospheric pressure in the pressure chamber 58 since the pressure chamber 58 is in fluid communication with the surroundings of the vacuum cleaner via the suction port 40 which is open during the suction operation.
  • the user can connect the pressure chamber 58 via the suction hose 20 with the dirt collecting 10. This is in FIG. 1 shown.
  • the user leads for this purpose, the free end of the suction hose 20, that is, the pipe section 22, in the pipe socket 42, so that the end face of the pipe section 22 sealingly abuts a disposed within the pipe socket 42 and the suction port 40 surrounding sealing ring 80 sealingly.
  • the rear side 62 of the closing body 44 is acted upon by the suction unit 20 of the vacuum cleaner 20, the dirt collecting container 10 and the suction line 18 from the suction unit of the vacuum cleaner.
  • the stage design of the closing body 44 has the consequence that the rear side acted upon by the negative pressure prevailing within the pressure chamber 58 of the closing body 44 is greater than the area of the end face 82 of the closing body 44 which is acted upon by the vacuum prevailing inside the suction line 18
  • Namely in the suction line 18 prevailing negative pressure surface stretches namely only on the end wall 64 and the region of the radial extension 50, which is within the surrounded by the sealing edge 76 annular space, whereas the pressure prevailing in the pressure chamber 58 negative pressure surface of the closing body 44th extends over both the back of the end wall 64 and over the back of the complete radial extension 50.
  • the scavenging air duct 30 communicates with the surroundings of the vacuum cleaner via inlet openings 84, flushing air can thus flow into the suction line 18 via the inlet openings 84, the scavenging air duct 30 and the scavenging air opening 32 in the release position of the closing body 44, wherein at least part of the scavenging air flows into the scavenging air Filter 16 flows counter to the direction of the prevailing during the normal suction suction flow 24.
  • the filter 16 is mechanically shaken by the sudden inflowing scavenging air. This results in an effective cleaning of the filter 16.
  • the closing body 44 Since in this position, the scavenging air opening 32 is sealed by the closing body 44, then reduced due to the continued operation of the suction of the end face acting on the closing body 44 pressure and with time delay due to the throttling action of the filter 16, the pressure in the dirt collecting 10 and in the pressure chamber 58, so that the closing body 44 is moved back into its release position. As long as the pressure chamber 58 is in fluid communication with the dirt collecting container 10 via the suction hose 20, the closing body 44 carries out a continuous reciprocating movement from, wherein the filter 16 is applied at successive times with short pressure pulses, which are caused by the incoming suction air. This supports the cleaning of the filter 16.
  • the movement of the closing body 44 from its closed position into its release position is assisted by the atmospheric pressure prevailing inside the scavenging air channel 30, which acts coaxially on the region of the radial extension 50 arranged outside the sealing edge 76.
  • the atmospheric pressure acting on the radial extension 50 outside the sealing edge 76 intensifies the movement of the closing body 44 in its release position.
  • the fixed to the closing body 44 sealing ring 78 thus lifts abruptly from the sealing edge 76, so that the scavenging air flowing through the scavenging air 32 in the suction 18 flushing the filter 16 impulsively applied. As a result, the cleaning effect is additionally enhanced.
  • the user can cancel the flow connection between the dirt collector 10 and the pressure chamber 58 again by pulling the pipe section 22 out of the pipe socket 42.
  • the suction port 40 is then open again and in the pressure chamber 58 is again atmospheric pressure, under the action of the closing body 44 is reliably held in its closed position. The normal suction operation of the vacuum cleaner can therefore be continued again.
  • FIG. 2 a second embodiment of a vacuum cleaner according to the invention is shown schematically in a partial sectional view. This embodiment is similar to that described above with reference to FIG. 1 explained first embodiment. For identical components are therefore in FIG. 2 the same reference numerals as in FIG. 1 , With respect to these components, reference is made to the above explanations to avoid repetition.
  • a plate-shaped closing body 94 which carries the sealing ring 78, wherein the sealing ring 78 at the in FIG. 2 illustrated embodiment is integrally connected to a membrane 96 which is fixed to the housing 28.
  • the plate-shaped closing body 94 carries on its rear side 62 facing away from the filter 16 for holding a closing spring 98 a retaining pin 100, and the end face carries the closing body 94 in a manner similar to the above with reference to FIG. 1 described closing body 44 a guide pin 66 which is received by a guide sleeve 68.
  • the pressure chamber 58 can be acted upon by the suction hose 20 with negative pressure, as already described above with reference to FIG. 1 was explained. Since the front side acted upon by the negative pressure prevailing in the suction line 18 surface of the closing body 94 is smaller than the rear side acted upon by the pressure prevailing in the pressure chamber 58 vacuum surface, the suction of the pressure chamber 58 leads also in the FIG. 2 illustrated embodiment in that the closing body 94 of his in FIG.
  • FIG. 3 a third embodiment of a vacuum cleaner according to the invention is shown schematically in a partial sectional view. This embodiment is configured similar to that described above with reference to FIG. 2 explained second embodiment. For identical components are therefore in FIG. 3 the same reference numerals as in FIG. 2 , With respect to these components, reference is made to the above explanations to avoid repetition.
  • the pressurization of the pressure chamber 58 with negative pressure is not carried out via the suction hose 20. Rather, the pressure chamber 58 at the in FIG. 3 illustrated embodiment via a connecting line 102 permanently connected to the suction line 18, wherein in the connecting line 102, a manually operable by the user directional control valve 104 is connected.
  • the directional control valve 104 has a first valve position, in which it connects the pressure chamber 58 via a first flow channel 106 with the surroundings of the vacuum cleaner, so that 58 pressure can form in the pressure chamber, under the action of the closing body 94 in his in FIG. 3 shown closed position is held.
  • the directional control valve 104 comprises a second valve position, in which it releases the connection between the pressure chamber 58 and the suction line 18 via the connecting line 102 via a second flow channel 108. Since the suction channel 18 is permanently in fluid communication with the suction unit, not shown in the drawing, the directional control valve 104 connects the pressure chamber 58 with the suction unit in its second valve position, so that the rear side of the closing body 94 is subjected to negative pressure by the suction unit in the manner already explained above can be.
  • the connecting line 102 has a throttle point 110 in the form of a cross-sectional constriction. Does the closing body 94 at the in FIG. 3 illustrated embodiment, its release position, so in the manner already described scavenging air in the Inlet pipe 18 flow. The purge air then passes via the connecting line 102 into the pressure chamber 58. Due to the throttle point 110, however, the pressure equalization takes place with a time delay. This has the consequence that even at the in FIG. 3 illustrated embodiment of the closing body 94 performs a continued reciprocating motion between its closed position and its release position.
  • the respective closing body 44 or 94 in its closed position is acted upon at the back with atmospheric pressure. This pressurization keeps the closure body 44 and 94 in its closed position.
  • the user via the suction hose 20 or via the connecting line 102 and the directional control valve 104 between the suction unit of the vacuum cleaner and the pressure chamber 58, so that the back of the closing body 44 and 94 is subjected to negative pressure and thereby the closing body 44 or 94 passes into its release position.
  • the vacuum cleaner according to the invention is characterized by an effective cleaning of the filter 16, wherein the vacuum cleaner is easy to handle and can be produced inexpensively.

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

Claims (16)

  1. Aspirateur comprenant un récipient collecteur de saletés (10), qui présente une entrée d'aspiration (12) et est en liaison fluidique par l'intermédiaire d'au moins un filtre (16) et d'une conduite d'aspiration (18) avec un groupe d'aspiration, l'aspirateur comprenant également un dispositif d'alimentation en air de balayage (26) destiné à amener de l'air de balayage dans la conduite d'aspiration (18) en aval du filtre (16), le dispositif d'alimentation en air de balayage (26) présentant au moins une ouverture d'air de balayage (32) ainsi qu'un corps de fermeture (44 ; 94) pourvu d'une face frontale tournée vers la conduite d'aspiration (18) et d'une face arrière qui est opposée à la conduite d'aspiration (18) et qui peut effectuer un mouvement de va-et-vient entre une position de fermeture, dans laquelle il ferme l'ouverture d'air de balayage (32) et une position de libération, dans laquelle il libère l'ouverture d'air de balayage (32), le corps de fermeture (44 ; 94) pouvant être déplacé dans sa position de libération à l'encontre d'une force de rappel en soumettant sa face arrière (62) à l'action du vide, caractérisé en ce que la face arrière (62) du corps de fermeture (44 ; 94) peut être amenée en liaison fluidique avec le groupe d'aspiration pour le soumettre à l'action du vide, la surface de la face arrière (62) du corps de fermeture (44 ; 94) pouvant être soumise à l'action du vide étant plus grande que la surface de la face frontale du corps de fermeture (44) pouvant être soumise à l'action de la pression régnant dans la conduite d'aspiration (18).
  2. Aspirateur selon la revendication 1, caractérisé en ce que le dispositif d'alimentation en air de balayage (26) comprend un boîtier (28) dans lequel le corps de fermeture (44 ; 94) est retenu mobile, le corps de fermeture (44 ; 94) délimitant une chambre de pression (58) du boîtier (28) qui peut être amenée en liaison fluidique avec le groupe d'aspiration par l'intermédiaire d'un dispositif de liaison (20 ; 102).
  3. Aspirateur selon la revendication 2, caractérisé en ce que le dispositif de liaison (20 ; 102) comprend un tuyau d'aspiration (20) qui peut être raccordé par une extrémité à l'entrée d'aspiration (12), et dont l'autre extrémité peut être amenée en liaison fluidique avec la chambre de pression (58).
  4. Aspirateur selon la revendication 3, caractérisé en ce que la chambre de pression (58) comprend un raccord d'aspiration (40) qui peut être relié de manière détachable à l'extrémité libre du tuyau d'aspiration (20) ou à une buse d'aspiration montée à l'extrémité libre du tuyau d'aspiration (20).
  5. Aspirateur selon la revendication 2, caractérisé en ce que le dispositif de liaison comprend une conduite de liaison (102) qui relie la conduite d'aspiration (18) à la chambre de pression (58), un élément d'obturation (104) pouvant être actionné, destiné à ouvrir et à fermer sélectivement la conduite de liaison (102), étant monté dans la conduite de liaison (102).
  6. Aspirateur selon la revendication 5, caractérisé en ce qu'un élément d'étranglement (110) est monté dans la conduite de liaison (102).
  7. Aspirateur selon l'une quelconque des revendications 2 à 6, caractérisé en ce que le dispositif de liaison comprend une soupape (104) qui, dans une première position de soupape, relie la chambre de pression (58) aux zones environnantes de l'aspirateur, et qui, dans une deuxième position de soupape, relie la chambre de pression (58) au groupe d'aspiration.
  8. Aspirateur selon l'une quelconque des revendications 2 à 7, caractérisé en ce que le boîtier (28) comprend une paroi de boîtier (56) sur laquelle le corps de fermeture (44 ; 94) est retenu mobile avec interposition d'un dispositif d'étanchéité (54 ; 96).
  9. Aspirateur selon la revendication 8, caractérisé en ce que le dispositif d'étanchéité comprend une bague d'étanchéité (54) et une surface d'étanchéité associée.
  10. Aspirateur selon la revendication 8 ou 9, caractérisé en ce que le corps de fermeture (44) est réalisé sous la forme d'un piston qui est retenu mobile dans le boîtier (28).
  11. Aspirateur selon la revendication 8, caractérisé en ce que le dispositif d'étanchéité comprend une membrane (96) par l'intermédiaire de laquelle le corps de fermeture (94) est relié à la paroi de boîtier (56).
  12. Aspirateur selon la revendication 11, caractérisé en ce que le corps de fermeture (94) est en forme de disque.
  13. Aspirateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le corps de fermeture (44 ; 94) est guidé de manière à pouvoir être déplacé dans une partie de guidage (68).
  14. Aspirateur selon la revendication 13, caractérisé en ce que la partie de guidage comprend un manchon de guidage (68) dans lequel le corps de fermeture (44 ; 94) pénètre au moyen d'un tourillon de guidage (66).
  15. Aspirateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le corps de fermeture (44 ; 94) s'applique de manière étanche dans la position de fermeture contre un bord (48) de l'ouverture d'air de balayage (32) et, à l'extérieur du bord (48) de l'ouverture d'air de balayage (32), sur la face frontale (62) peut être soumis à l'action d'une pression qui est supérieure à la pression régnant dans la conduite d'aspiration (18) pendant le mode aspiration.
  16. Aspirateur selon la revendication 15, caractérisé en ce que le boîtier (28) comprend un canal d'air de balayage (30) qui est relié à la conduite d'aspiration (18) par l'intermédiaire de l'ouverture d'air de balayage (32), le canal d'air de balayage (30) entourant la face frontale du corps de fermeture (44) à l'extérieur du bord de l'ouverture d'air de balayage (32).
EP11722785.0A 2010-05-31 2011-05-24 Aspirateur avec nettoyage de filtre par contre-courant Not-in-force EP2575587B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010029524A DE102010029524A1 (de) 2010-05-31 2010-05-31 Staubsauger
PCT/EP2011/058424 WO2011151219A1 (fr) 2010-05-31 2011-05-24 Aspirateur équipé d'un nettoyage de filtre par contre-courant

Publications (2)

Publication Number Publication Date
EP2575587A1 EP2575587A1 (fr) 2013-04-10
EP2575587B1 true EP2575587B1 (fr) 2017-07-19

Family

ID=44119217

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Application Number Title Priority Date Filing Date
EP11722785.0A Not-in-force EP2575587B1 (fr) 2010-05-31 2011-05-24 Aspirateur avec nettoyage de filtre par contre-courant

Country Status (4)

Country Link
EP (1) EP2575587B1 (fr)
CN (1) CN102917628B (fr)
DE (1) DE102010029524A1 (fr)
WO (1) WO2011151219A1 (fr)

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US11465087B2 (en) 2017-05-02 2022-10-11 Husqvarna Ab Valve, use of such valve, separator comprising such valve and method of operating a separator

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WO2016112959A1 (fr) 2015-01-13 2016-07-21 Alfred Kärcher Gmbh & Co. Kg Aspirateur
DK3244785T3 (da) * 2015-01-13 2019-07-01 Kaercher Alfred Se & Co Kg Sugeindretning og fremgangsmåde til drift af en sugeindretning
DE102015108559A1 (de) * 2015-05-29 2016-12-01 Vorwerk & Co. Interholding Gmbh Rückspülbarer Luftfilter
DE102015113189A1 (de) * 2015-08-11 2017-02-16 Festool Gmbh Sauggerät
DE102016118807A1 (de) * 2015-12-21 2017-06-22 Vorwerk & Co. Interholding Gmbh Rückspülbarer Luftfilter und Staubsauger mit einem rückspülbaren Luftfilter
DE102016100780A1 (de) * 2016-01-19 2017-07-20 Festool Gmbh Sauggerät
DE102016100820A1 (de) * 2016-01-19 2017-07-20 Vorwerk & Co. Interholding Gmbh Saugreinigungsgerät
WO2018050208A1 (fr) * 2016-09-13 2018-03-22 Alfred Kärcher Gmbh & Co. Kg Aspirateur adapté à l'aspiration de centres
GB201700637D0 (en) 2017-01-13 2017-03-01 Black & Decker Inc Dust collection box
WO2018153281A1 (fr) * 2017-02-27 2018-08-30 天佑电器（苏州）有限公司 Aspirateur à fonction d'auto-nettoyage et procédé d'auto-nettoyage associé
DE102019117920A1 (de) 2019-07-03 2021-01-07 Alfred Kärcher SE & Co. KG Saugvorrichtung und Verfahren zur Abreinigung eines Filters
CN217408677U (zh) * 2022-01-14 2022-09-13 博世电动工具（中国）有限公司 除尘装置和吸尘器

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DE59507757D1 (de) 1995-11-30 2000-03-09 Kaercher Gmbh & Co Alfred Sauggerät für reinigungszwecke
DE29823411U1 (de) 1998-05-08 1999-05-20 Alfred Kärcher GmbH & Co, 71364 Winnenden Sauggerät für Reinigungszwecke
DE10101219C9 (de) * 2001-01-12 2018-05-17 Nilfisk-Advance A/S Schmutzsauger
FR2836056B1 (fr) 2002-02-18 2005-02-04 Aldes Aeraulique Procede de decolmatage automatique du filtre d'un systeme d'aspiration centralise, dispositif pour ce procede et systeme d'aspiration centralise equipe d'un tel dispositif
DE102004056076A1 (de) * 2004-11-12 2006-05-18 Alfred Kärcher Gmbh & Co. Kg Staubsauger sowie Zyklonabscheidevorrichtung und Zyklon für einen Staubsauger
EP2046182B1 (fr) 2006-07-29 2014-05-21 Alfred Kärcher GmbH & Co. KG Aspirateur avec dispositif autonettoyant du filtre

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US11465087B2 (en) 2017-05-02 2022-10-11 Husqvarna Ab Valve, use of such valve, separator comprising such valve and method of operating a separator

Also Published As

Publication number Publication date
CN102917628A (zh) 2013-02-06
DE102010029524A1 (de) 2011-12-01
WO2011151219A1 (fr) 2011-12-08
CN102917628B (zh) 2015-09-02
EP2575587A1 (fr) 2013-04-10

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