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
  • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
  • A47L9/106—Dust removal
• • 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
  • A47L9/127—Dry filters tube- or sleeve-shaped
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
  • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
  • B01D46/2411—Filter cartridges
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/42—Auxiliary equipment or operation thereof
  • B01D46/4227—Manipulating filters or filter elements, e.g. handles or extracting tools
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
  • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
  • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
  • B01D46/64—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
  • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
  • B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
  • B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
  • B01D2279/55—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for cleaning appliances, e.g. suction cleaners

Definitions

• the invention relates to a dust filtration device intended to be mounted in a receiving compartment which is arranged in particular in a vacuum cleaner and which comprises a dirty air inlet and a filtered air outlet, said device comprising two filtration stages formed by a pre-filter and a filter arranged in the air stream maintained between the inlet and the air outlet by a suction unit.
• a two-stage filtration device is described for example in GB 886641 and US6546592.
• the pre-filter has a tubular cage, with longitudinal axis XX, filtering side wall which is closed at its ends respectively by two lids constituting a primary chamber and one of the lids is associated with a tubing d air intake adapted to come to mate with the dirty air inlet, and the filter, having a tubular structure with a filtering side wall, is mounted to fit around the pre-filter with a clearance J thus providing an annular chamber secondary which is closed by two covers integral with the ends of the structure and one of which has a passage opening for the tubing of the pre-filter, the device being characterized in that the cap has the shape of a cover on which is mounted the intake manifold, and is mounted movably on the lid by means of a hinge and retained, sealingly, on the lid by a hook diametrically opposite the articu tion, and in that the pre-filter and filter assembly constitutes a dust box.
• the device comprises means for emptying the primary and secondary chambers.
• the receiving compartment is no longer the function of dust collection, but serves only as a receptacle for the dust box assembly, this assembly containing all the dust sucked and can thus be carried easily above, for example of a trash can, to proceed without dirtying a emptying operation of the primary and secondary rooms.
• this monobloc construction provides a filter device particularly clean, simple, robust, easy assembly and therefore a lower manufacturing cost. It will be understood that this filtration device induces a simplified construction of the housing of the vacuum cleaner which is particularly interesting for hand-held portable vacuum cleaners.
• the construction of the filter closed by two lids makes it possible to use a conventional construction filter and therefore a competitive cost price.
• certain vacuum cleaners use mechanical means for cleaning the filter as described, for example, in EP 1523916.
• the pre-filter and the filter are mounted in a dust collection chamber which is removably mounted on the housing of the vacuum cleaner to allow its emptying.
• This emptying operation is tedious, but also causes three cleaning operations in the open air, the first emptying said compartment and clean its inner wall, the second to brush the wall external of the pre-filter and the third to remove the pre ⁇ filter to clean the inner wall on which accumulated dust removed from the filter by the declogging means.
• Aspirators are also known comprising a pleated type filter in addition to a dust bag and subjected to a declogging means.
• a bag Although the use of a bag is practical, it appears in this construction that the bag emptying operations and cleaning the filter require manipulations generating dust flights.
• the unclogging means is not optimal because it is automatic throughout the operation of the device which suggests that the shaken dust is immediately re-aspired.
• the unclogging means comprises an integral member of the pre-filter cage and intended to come into contact with the inner side wall of the filter; said filter and said pre-filter being able to be driven by a relative rotational movement.
• the receiving compartment is no longer the function of dust collection, but serves only as a receptacle for the dust box assembly, this one-piece assembly containing all the dust sucked and can thus be carried easily above, by example of a trash can, to proceed without getting dirty to an emptying operation of the primary and secondary rooms.
• the filtration device according to the invention proves to be an improvement in the hygiene of use of reusable filters.
• a very interesting application is the integration of such a filtration device into a vacuum cleaner of the type comprising a receptacle forming a generally tubular housing which contains a suction unit comprising a casing enclosing a centrifugal fan driven by a motor and having a suction nozzle which is located upstream of the filtration device and facing the seal without tubing and which is extended by a volute attached to the compartment, and a discharge port arranged in a direction transverse to that of the suction nozzle and through which the air is discharged to the outside; said motor being positioned in the volute with one of its flanges located downstream in the air stream.
• This particular embodiment of the filtration device makes it possible to use a turbine whose flow rate is very high at low power, thus enabling a lower energy consumption with a more than excellent result in dust extraction.
• a turbine whose flow rate is very high at low power, thus enabling a lower energy consumption with a more than excellent result in dust extraction.
• the dust filtration device designated as a whole by the reference 1, is intended to be mounted in a receiving compartment shown schematically by the reference 2 and which comprises an access door schematically in 2 ', a dirty air inlet 3 communicating with a not shown cleaning tool, and a filtered air outlet 4.
• This device is arranged in particular in a conventional vacuum cleaner whose compartment 2 also forms the housing and contains a suction unit schematically in 6 connected to the filtered air outlet 4.
• This vacuum cleaner can have a shape called hand or broom or sleigh.
• the filtration device 1 can also be arranged in a compartment mounted in the suction circuit of a central vacuum. In the example shown, the filtration device is mounted in a vacuum cleaner of the type held by hand.
• Said filtration device comprises two filtration stages formed by a pre-filter 7 and a filter 8 arranged in the stream of air maintained in the compartment 2 between the inlet 3 and the outlet 4 of air by the suction unit 6.
• the pre-filter 7 has a tubular cage 9, with longitudinal axis XX, filtering side wall which is closed at its anterior and posterior ends respectively by two lids 10 and 11 constituting a primary chamber and one of the lids is associated with an intake manifold 12 adapted to come mate with the inlet 3 dirty air.
• the filter 8 having a tubular structure 13 with a filtering side wall, is mounted to fit around the pre-filter with a clearance J thus providing a secondary annular chamber which is closed by two covers 14 and 15 integral with the ends of the structure and whose a 14 presents an opening 16 passage for the tubing 12 of the pre-filter, and in that all pre ⁇ filter 7 and filter 8 forms a dust box and comprises means for emptying the primary and secondary chambers.
• This dust box is removably mounted in the compartment 2 and rests on a cradle 5 formed for example of several brackets bearing on the wall of the compartment and respectively on the edges of the covers 14 and 15.
• the said consoles are spaced so as not to not disturb the air flow coming out of the filter 8.
• the pre-filter 7 is removably mounted in the filter 8 through the opening 16, a sealing means being arranged between this opening and the cage 9.
• the tubular structure 13 of the filter 8 and the cage 9 of the pre-filter 7 respectively have a generally cylindrical shape.
• the clearance J between the filter 8 and the pre-filter 7 is given by an empirical choice that combines performance of filtration and capture volume of fine dust and has a radial dimension of the order of one centimeter.
• this monobloc construction of the filtration device ensures, by its large filtration surface formed by the two chambers, a selective and complete collection of dust; that is to say that this one-piece set of nested filters forms a removable dust box whose function is to retain all the dust sucked leaving the receiving compartment clean.
• the cage 9 of the pre-filter 7 is made by a molded plastic frame having longitudinal longitudinal members and annular ribs on which is fixed a filter cloth (partially shown by the reference 9 '), preferably by overmolding.
• the pre-filter 7 comprises a thin mesh fabric, for example Nylon® (registered trademark) so as to retain the large dust
• the filter 8 comprises, for example, a canvas or a very fine mesh material or a PET type material for retaining fine dust.
• the filter and pre-filter materials will preferably be chosen for their quality of separation of dust while allowing their washing.
• the invention provides for equipping this filtering device with a means for unclogging the filter.
• internal side wall 18 of the filter 8 which is arranged in the game J.
• the unclogging means may be designed as a brush adapted to slide manually in the space J to rub the inner side wall 18 of the filter 8; said brush being operable from outside the filter box by a rod passing through one of the covers.
• the filtration device according to the invention not only acts as a vessel and encloses the dust, but also makes it possible, without removing the filters, to extract the fine dust attached to the inner wall 18 of the filter.
• the filter 8, the pre-filter 7 and the unclogging means form a compact assembly removably mounted in the receiving compartment 2. As will be understood, this assembly constitutes a dust box that can be handled in a clean manner because the external wall of the filter remains clean.
• the unclogging means comprises a projecting member 19 integral with the cage 9 of the pre-filter 7 and intended to come into contact with the inner side wall 18 of the filter 8; said filter and said pre-filter being able to be driven by a relative rotational movement.
• the member 19 being carried by the armature of the cage 9 of the pre-filter 7, the cage 9 of the pre-filter is rotatably mounted in the filter and for this purpose has a bearing surface 20 and a bearing 21 which rest respectively on two bearings 22 and 23 opposed longitudinally and carried respectively by the covers 14 and 15.
• the bearing 22 is presently formed by spaced radial teeth made on the cover 14 and the bearing 23 is formed by the edge of an orifice 25 made in the cover 15.
• the cage 9 of the pre-filter is rotated by a handle 24 integral with the cap 11 and protruding outwardly of the pre-filter and through the orifice 25.
• a handle 24 integral with the cap 11 and protruding outwardly of the pre-filter and through the orifice 25.
• an annular gasket 26 with radial lips is placed in a housing formed between an annular partition 27 carried by the cover 15 and a partition 28 also annular carried by the 11.
• the seal at the lid 10 and the lid 14 is obtained by a seal 29 inserted in a groove made in the lid 10 and which engages with the outer edge of a circular wall 14 ' by the cover 14.
• the structure of the filtering wall of the filter 8 is of the pleated type constituted by folds arranged longitudinally to the axis XX and thus forming longitudinal internal and external edges.
• the member 19 of the cage 9 is then formed by at least one boss, preferably by a plurality of radial bosses distributed longitudinally and angularly so as to allow vigorous shaking over the entire longitudinal length of the filter.
• said bosses are distributed in pairs along the same longitudinal line of the longitudinal members of the frame of the cage 9, being spaced from each other, so as to vibrate under the impact of the whole body. internal edge of the fold concerned.
• the angular distribution of the bosses is carried out in two diametrically opposite lines.
• the cage 9 pre ⁇ filter 7 has a frustoconical shape whose large base is open and the cover door 10 and whose small base is closed by the lid 11, and its side wall supports the fabric 9 'able to retain large dust.
• the filter 8 also has a frustoconical shape whose large base is formed by the cover 14 and whose small base is formed by the cover 15, while the structure of the lateral surface is of the pleated type with the folds extending longitudinally, and has a texture capable of retaining fine dust.
• the main advantage of this configuration is associated with the shape given to the wall of the compartment 2 which is presently of cylindrical shape.
• the air passage section delimited by the wall of the filter 8 and the wall of the compartment 2 increases from the large base towards the small base in the direction of the air flow which guarantees a flow velocity of constant air and thus ensures a large flow and the limitation of pressure losses.
• Such a filtration device is also remarkable in that it organizes a stream of air along a simplified path first longitudinally between the tubing 12 and the pre-filter 7 whose role is to sift the incoming dust to retain the most large, then transverse of the pre-filter to the filter 8 which retains by its texture the finest dust, and finally longitudinal between the filter 8 and the outlet 4 connected to the suction unit so that the air follows a winding course promoting the deposit of dust.
• the cover 10 has the shape of a cover on which the intake manifold 12 is mounted and which is mounted to move on the cover 14 by means of a hinge 30 and held tightly on the cover 14 by an elastic hook 31 diametrically opposed to the joint.
• This tubing comprises a non-return valve 32 so as to retain the dust in the pre-filter.
• the pre-filter 7 and the cap 10 equipped with the tubing 12 comprise a mutual means of automatic opening.
• This mutual means of openness comprises tabs 33 which each have a beveled tip 34 and a base implanted on the large base of the pre-filter, and the cover-shaped cap 10 has an internal edge 36 having bosses 37, each vertex of which is turned towards the meadow -filter, is of triangular general shape.
• the handle 24 By means of the handle 24, it rotates the pre-filter 7 and thus the tabs 33 which abut the bosses 37 inducing axial thrust forces which, in a first step, unlock the elastic hook 31, then outwardly hunt the cover / cap 10 which pivots around its articulation 30. Simultaneously, the bosses of the member 19 hit the folds of the filter 8 one after the other causing the fine dust to fall into the secondary chamber. During the rotation and shaking of the filter, the vibrations generated by the bosses contribute to the unclogging of the pre-filter. Then, under the action of gravity, the secondary chamber and the primary chamber empty automatically from all dust, without shaking and thus without clearing a dusty cloud.
• the filtration device described above is particularly well suited to its implementation in a vacuum cleaner whose housing 2 has a cylindrical shape and cleans a dust compartment 2 which surrounds the filter 8 by providing an air circulation space of increasing section from downstream to upstream, while the suction unit 6 is arranged upstream of the filter 8 and pre-filter 7 in the air stream.
• Said group 6 comprises a casing 38 enclosing a fan 40 of the centrifugal type driven by a motor 39 and having a suction nozzle 41 located upstream of the filtration device and extended by a volute 42 attached to the compartment 2, and an orifice of delivery 43 arranged in a direction transverse to that of the suction nozzle and through which the air is rejected outside.
• the motor 39 is positioned in the housing 38 with one of its flanges 44 located downstream in the air stream.
• the arrangement of the monoblock filtration device placed just before the suction nozzle 41 makes it possible to obtain a longitudinal and swirling air stream all around the motor and the filter favoring the high suction flow rate and avoiding the pressure losses between this filter and the fan.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Geometry (AREA)
• Filters For Electric Vacuum Cleaners (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=41818569

Family Applications (1)

Country Status (3)

Families Citing this family (4)

Family Cites Families (9)

• 2009
  • 2009-10-08 FR FR0904825A patent/FR2951087B1/fr not_active Expired - Fee Related
• 2010
  • 2010-10-06 EP EP10778701A patent/EP2485825A1/de not_active Withdrawn
  • 2010-10-06 WO PCT/FR2010/052106 patent/WO2011042661A1/fr active Application Filing

Non-Patent Citations (1)

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