EP2818087A1 - Filtre à liquide pour aspirateur - Google Patents

Filtre à liquide pour aspirateur Download PDF

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Publication number
EP2818087A1
EP2818087A1 EP14165116.6A EP14165116A EP2818087A1 EP 2818087 A1 EP2818087 A1 EP 2818087A1 EP 14165116 A EP14165116 A EP 14165116A EP 2818087 A1 EP2818087 A1 EP 2818087A1
Authority
EP
European Patent Office
Prior art keywords
air
liquid
vacuum cleaner
way
bottom wall
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.)
Withdrawn
Application number
EP14165116.6A
Other languages
German (de)
English (en)
Inventor
Renato Chiarini
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.)
Elettroplastica SpA
Original Assignee
Elettroplastica SpA
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 Elettroplastica SpA filed Critical Elettroplastica SpA
Publication of EP2818087A1 publication Critical patent/EP2818087A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L7/00Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0004Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
    • A47L7/0014Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners with additional means or devices between nozzle and casing
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details 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
    • A47L9/10Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/18Liquid filters
    • A47L9/181Separating by passing the air through a liquid bath
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details 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
    • A47L9/10Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/18Liquid filters
    • A47L9/185Means for the mechanical control of flow of air, e.g. deflectors, baffles or labyrinths

Definitions

  • This invention relates to a vacuum cleaner with liquid filtering.
  • a vacuum cleaner with water filter comprises a filtering chamber having an air inlet section, put in fluid communication with the outside (for example by means of a flexible duct), and an air outlet section. More specifically, the air outlet section is usually connected to a motor-driven suction device in such a way as to create a negative pressure inside the filtering chamber.
  • a main path is defined for the air inside the filtering chamber extending from the air inlet section to the air outlet section and passing through the water.
  • the suction device generates a flow of air along the main path in such a way as to suck air through the inlet section and pass it through the water.
  • the filtering chamber comprises a tank for containing water and an air infeed duct associated with the air inlet section and facing towards the containment tank.
  • vacuum cleaners with water filters are described in patent documents US2008/0092327 and EP2362745 in which it is possible to see that an infeed duct feeds the air sucked from the outside directly into the water in such a way that the flow of air propagates into it for the filtering.
  • patent document EP2362745 there are two infeed ducts each having an infeed opening positioned below the water level in such a way that the air is fed directly into the water. Moreover, again in patent document EP2362745 there is a further opening positioned along the infeed duct above the first opening and outside the water, to define an air current along the duct and contain the surface agitation of the water.
  • a first drawback is linked to the fact that the quality of the filtering is a function of the speed and flow rate of the air which flows in the infeed duct. For this reason, if the air has a high speed and flow rate, after passing through the infeed opening, it has a sufficient force to enter, at least mostly, in water in such a way as to perform the filtering. On the other hand, if the air speed and flow rate is low, it does not have sufficient force to enter in water and, in part, is directed directly towards the outlet section. In other words, during operation of the vacuum cleaner when the air speed is less than a predetermined value the filtering is poor. This operation with low air speed occurs in particular when the inlet section is partly obstructed for example because a flexible surface is being sucked.
  • the aim of this invention is to provide a vacuum cleaner with liquid filtering which overcomes the above mentioned drawbacks. More specifically, the aim of this invention is to provide a vacuum cleaner with liquid filtering which makes it possible to optimise the filtering of the air sucked under all operating conditions.
  • Another aim of this invention is to provide a vacuum cleaner with liquid filtering which allows the liquid agitation phenomenon to be reduced.
  • Another aim of this invention is to provide a vacuum cleaner with liquid filtering which has reduced external dimensions.
  • the reference numeral 1 denotes in its entirety a vacuum cleaner with liquid filtering according to this invention.
  • the vacuum cleaner 1 comprises a motor-driven suction device 2 that creates an inflow of air.
  • the motor-driven suction device 2 comprises a motor 3 and a suction fan 4 connected to the motor 3 which generates the air flow with the activation of the motor 3.
  • the suction device 2 is positioned in a service compartment 5 having a first hole 6 and a second hole 7.
  • the suction device 2 is configured to generate the flow of air from the first hole 6 towards the second hole 7.
  • the first hole 6 is in fluid communication with a filtering chamber 8 (described below), whilst the second hole 7 is in fluid communication with the outside environment or with a collection bag (not illustrated in the accompanying drawings).
  • the vacuum cleaner 1 comprises a filtering chamber 8 ( Figure 2 ) having an air inlet section 9, put in fluid communication with the outside environment, and an air outlet section 10.
  • the air outlet section 10 is in fluid communication with the first hole 6 of the service compartment in such a way that the suction device 2 can extract air through the outlet section 10.
  • a main path is defined for the air inside the filtering chamber 8 extending from the air inlet section 9 to the air outlet section 10.
  • the flow of air moves along the main path for making the suction.
  • the suction device 2 generates a flow of air along the main path in such a way as to suck air through the inlet section 9.
  • the filtering chamber 8 is defined at the top by an upper wall 11, laterally by side walls 12 and at the bottom by a containment tank 13 (described below). More specifically, the air outlet section 10 is made at the upper wall 11. Preferably, the outlet section 10 is made in a substantially central position relative to the surface extension of the upper wall 11.
  • the filtering chamber 8 comprises a tank 13 for containing the liquid having a bottom wall 14 extending along a surface extension.
  • the containment tank 13 defines the closing of the lower part of the filtering chamber 8.
  • the vacuum cleaner 1 comprises an air infeed duct 15 associated with the air inlet section 9 (to move the air inside the filtering chamber 8) and has an infeed opening 16 positioned inside the filtering chamber 8.
  • the air infeed duct 15 extends between an operational opening 17 positioned on the outside of the filtering chamber 8 to which a suction pipe 18 or a suction opening is connectable, and an infeed opening 16 which is positioned inside the filtering chamber 8 to move the sucked air into it.
  • the main path of the air passes in the containment tank 13 through the liquid in such a way as to make the filter.
  • the air infeed duct 15 extends inside the containment tank 13 away from the bottom wall 14 along a direction of extension transversal to the surface area.
  • the infeed duct 15 extends through the bottom wall 14 and protrudes relative to it inside the containment tank 13.
  • the infeed duct 15 extends away from the bottom wall 14 along a direction of extension substantially at right angles to the surface area.
  • the infeed duct 15 is positioned in a central position relative to the area of extension of the bottom wall 14 in such a way as to be surrounded by the liquid.
  • the position of the infeed duct 15 determines the maximum distance of the latter relative to the side walls 12 of the filtering chamber 8 in such a way as to have the maximum space so that it calms, as much as possible, the wave motion generated by the feeding of the air into the liquid (away from the infeed duct 15).
  • the infeed opening 16 is distanced from the bottom wall 14 according to predetermined distance in such a way as to emerge from the level of the liquid.
  • the level of the liquid (when the bottom wall 14 is horizontal) is below the infeed opening 16.
  • the air enters the filtering chamber 8 through the opening and is not fed directly into the liquid, but is introduced above the level of the liquid.
  • the vacuum cleaner 1 comprises an air diversion obstacle 19 facing the infeed opening 16 and extending, at least partly, transversely relative to a direction of entry of the air from the infeed opening 16 for diverting the air towards the bottom wall 14 in such a way as to pass the air through the liquid for performing the filtering.
  • the air diversion obstacle 19 is positioned between the infeed opening 16 and the upper wall 11 of the filtering chamber 8. In other words, the air diversion obstacle 19 is positioned in a position above the infeed opening 16 relative to a vertical direction.
  • the air diversion obstacle 19 is positioned at the infeed opening 16 and spaced from it in such a way as to wrap around it.
  • the diversion obstacle 19 comprises a concave panel above the air infeed opening 16. More specifically, the concave panel forms a cover spaced from the infeed opening 16.
  • the concave panel extends along the area defined by the entire infeed opening 16 and comprises a central portion 20 facing the infeed opening 16 and a side portion 21 extending along the air infeed duct 15.
  • the concave panel defines substantially a pipe (formed by the central portion 20 and the side portion 21) fitted on the infeed duct 15 and coaxially with the latter. More in detail, the fitted pipe has an internal diameter greater than the diameter of the infeed duct 15 in such a way as to form slots for passage of the air.
  • the level of the liquid is above the passage slot 22 in such a way that the air diverted by the concave panel is fed directly in the liquid for filtering.
  • the distance between the side portion 21 and the infeed duct 15 is less than the distance between the central portion 20 and the infeed opening 16 in such as way as to define an acceleration of the air in the section between the side portion 21 and the infeed duct 15.
  • the reversal of the direction of propagation of the air and the acceleration of the air flow favours the feeding of the air into the liquid contained in the containment tank 13.
  • the vacuum cleaner 1 comprises an air diversion structure 23 positioned close to the bottom wall 14 of the tank and outside the infeed duct 15 as shown in Figure 2 .
  • the diversion structure 23 has a cavity 24 facing the diversion obstacle 19 and shaped for receiving the air diverted by the diversion obstacle 19 and directing it away from the bottom wall 14 in such a way as to remove the air from the liquid. More in detail, the diversion structure 23 is positioned on the bottom wall 14 of the containment tank 13 and determines a further diversion of the air which reaches close to the bottom wall 14.
  • the diversion structure 23 is positioned at the base of the air infeed duct 15 and all around it. In other words, the diversion structure 23 is completely immersed in the liquid.
  • the cavity 24 has, in a section at right angles (according to a point at right angles to the bottom wall 14), a profile tapered away from the bottom wall 14.
  • the diversion structure 23 makes it possible to again divert the flow of liquid in such a way as to optimise the filtering of the air. In that way, in effect, the air passes through the liquid twice (from the infeed opening 16 to the bottom wall 14 and from the latter towards the filtering chamber 8) to increase the time of contact between the air and water in order to improve the filtering.
  • this invention comprises a plurality of pairs of diverters each comprising a diversion obstacle 19 and a diversion structure 23 positioned consequentially away from the side of the infeed duct 15 in such a way as to increase even more the time of contact between the air and liquid.
  • the vacuum cleaner 1 comprises a fragmentation grill 25 ( Figures 2 and 5 ) spaced from the diversion structure 23 along a direction away from the bottom wall 14.
  • the fragmentation grill 25 is positioned above the bottom wall 14 in a vertical direction.
  • the diversion structure 23 extends around the infeed duct 15 in such a way as to fragment the particles of liquid moved when the air leaves the liquid. More in detail, the fragmentation grill 25 extends substantially parallel to the bottom wall 14 in such a way as to fragment the fountain of liquid generated by the rising of the air after the diversion created by the diversion structure 23.
  • the fragmentation grill 25 is positioned at the level of the liquid. Moreover, the fragmentation grill 25 is supported by a side panel 26 which extends from the bottom wall 14 to the edge of the grill. In other words, the side panel 26 which supports the fragmentation grill 25 extends all around the infeed duct 15 in such a way as to enclose a part of the volume of liquid positioned between the side panel 26 and the infeed duct 15.
  • the side panel 26 has a slit 27 with dimensions predetermined as a function of the ratio between the air flow rate and the speed of movement of the air flow. More in detail, the slit 27 has a rectangular shape preferably having a length of between 5 cm and 7 cm along the side panel 26 in a direction substantially parallel to the bottom wall 14 and a height of between 1 cm and 2 cm in a direction substantially transversal to the bottom wall 14.
  • the diversion obstacle 19 is a single body with the fragmentation grill 25 and with the side panel 26.
  • the vacuum cleaner 1 comprises a plurality of damping fins 37 connected to the bottom wall 14 and extending away from it towards the upper wall 11 for a predetermined height in such a way as to dampen the wave motion of the liquid created inside the containment tank 13.
  • each damping fin 37 extends at right angles to the bottom wall 14.
  • each damping fin 37 extends away from the bottom wall 14 by a height of between 15 millimetres and 30 millimetres (preferably 25 millimetres).
  • each damping fin 37 has two surfaces opposite and parallel to each other positioned at right angles to the bottom wall 14. It should be noted that each damping fin 37 is positioned at the side walls 12 and is connected to them in such a way as to fill the angular space between the bottom wall 14 and the side walls 12.
  • damping fins 37 are positioned in a radiating fashion about the centre of the containment tank 13.
  • the damping fins 37 allow the wave movement generated inside the containment tank 13 (linked also to the fact that it is a pull-type vacuum cleaner) to be dampened in such a way as to further reduce the formation of foam.
  • the vacuum cleaner 1 comprises a fragmentation barrier 28 ( Figure 4 ) spaced from the fragmentation grill 25 away from the bottom wall 14.
  • the fragmentation barrier 28 has a plurality of slits 29 in such a way as to reduce the speed of the moving liquid. It should be noted that the fragmentation barrier 28 is mounted above the fragmentation grill 25 in a vertical direction and is positioned outside the liquid.
  • the fragmentation barrier 28 is concave and forms a concavity facing the fragmentation grill 25. More in detail, the fragmentation barrier 28 has a lateral extension substantially equal to the lateral extension of the fragmentation grill 25. In other words, the fragmentation barrier 28 completely covers the fragmentation grill 25. Preferably, the fragmentation barrier 28 is positioned outside of the liquid.
  • the slits 29 of the fragmentation barrier 28 extend radially from a central part 30 of the fragmentation barrier 28 towards the edge of the fragmentation barrier 28.
  • the vacuum cleaner 1 comprises a closed barrier 31 ( Figure 3 ) above the fragmentation barrier 28, in a vertical direction, in such a way as to condensate the liquid.
  • the closed barrier 31 prevents the passage of the air towards the upper wall 11 of the filtering chamber 8 after passing the fragmentation barrier 28.
  • the closed barrier 31 has a concave shape in a similar fashion to the fragmentation barrier 28 and has a maximum diameter greater than the maximum diameter of the fragmentation barrier 28 in such a way as to cover the top of the latter. It should be noted that the closed barrier 31 is spaced from the fragmentation barrier 28 according to a predetermined distance in such a way as to form an air space between the two for the passage of the air and the condensated liquid.
  • the vacuum cleaner 1 comprises an inner wall 32 positioned inside the filtering chamber 8 and extending from the upper wall 11 towards the containment tank 13 for a predetermined length. More specifically, the inner wall 32 extends along the side walls 12 and is spaced from them in such a way as to surround the suction area. In effect, the outlet section 10 is positioned at the upper wall 11 and is surrounded by the inner wall 32 in such a way that the air is sucked through the space inside the inner wall 32.
  • the inner wall 32 prevents the drops of liquid generated by the wave motion at the side walls 12 from being sucked in through the outlet section 10.
  • the vacuum cleaner 1 comprises an air-liquid separator filter 33 ( Figure 2 ) positioned at the outfeed section 10 in such a way as to filter any drops of liquid carried by the air.
  • the separator filter 33 is positioned at the upper wall 11 inside the inner wall 32 in such a way as to filter the flow of air relative to drops of liquid still mixed in the air flow.
  • the vacuum cleaner 1 comprises a structure 34 for supporting the separator filter 33 mounted on the closed barrier 31.
  • the supporting structure 34 is positioned between the closed barrier 31 and the separator filter 33 and supports the separator filter 33.
  • the supporting structure 34 is positioned above the closed barrier 31.
  • the supporting structure 34 has a groove 35 extending between an upper area of the filtering chamber 8 close to the upper wall 11 and the closed barrier 31 for draining the drops of liquid.
  • the groove 35 collects and channels the drops of water which percolate from the upper area.
  • the supporting structure 34 is positioned in a zone in which the movement of air is practically zero, such as the upper part of the closed barrier 31, in such a way that the drops of liquid percolate towards the containment tank 13 without being struck by the flow of air.
  • the upper wall 11 can be disconnected from the rest of the filtering chamber 8 so as to fill the containment tank 13 with liquid or to perform other operations not explicitly mentioned.
  • the upper wall 11 is defined by a cover.
  • the upper wall 11 comprises a central part 36 which is in turn removable from the rest of the upper wall 11, so as to allow the cleaning of the separator filter 33.
  • the central part 36 faces the separator filter 33.
  • the central part 36 is positioned inside an extension of the inner wall 32.
  • This invention also relates to a method of suction with liquid filtering. It should be noted that the method is derived directly from what was described above, which is here below incorporated in its entirety.
  • the method comprises a first operating step of preparing a filtering chamber 8 of the type described above comprising a tank 13 for containing the liquid having a bottom wall 14. More specifically, the method comprises generating a flow of air along the main path from the air inlet section 9 to the air outlet section 10 and passing through the liquid contained in the containment tank 13.
  • the method is characterised in that the step of generating the flow of air comprises feeding the air through an infeed duct 15 extending through the bottom wall 14 and having an infeed opening 16 positioned above the level of the liquid.
  • the flow of air enters the filtering chamber 8 at right angles to the bottom wall 14.
  • the method comprises a step of diverting the flow of air entering through the infeed opening 16 towards the bottom wall 14 in such a way that it enters into the liquid for filtering. More specifically, the step of diverting the flow of air comprises reversing the direction of propagation of the air flow in such a way that it moves from the infeed opening 16 towards the bottom wall 14.
  • the method comprises a further step of diverting the flow of air which comprises reversing the direction of the flow of air once the latter has reached close to the bottom wall 14 in such a way that the flow moves away from the bottom wall 14 to escape from the liquid.
  • the method comprises filtering the flow of air escaping from the liquid using at least one filter in such a way as to calm and break up the fountain of liquid generated after the escape of the flow of air from the liquid.
  • the method comprises a step of blocking the flow of filtered air using a closed barrier 31 in such a way as to prevent the drops of liquid being sucked through the outlet section 10.
  • This invention achieves the preset aims.
  • the invention allows a vacuum cleaner to be made with liquid filtering wherein the filtering of the air is optimised.
  • the time of contact between the air and water is increased in such a way as to improve the filtering.
  • this invention allows an optimum filtering also at low speeds since the particular combination of the infeed duct with the concave panel fitted on it defines a path of the air which makes it possible to speed up the flow of air entering in the liquid.
  • the invention allows a vacuum cleaner to be made which is able to reduce the liquid agitation phenomenon.
  • the presence of the grill, the barriers (filtering and closed) and the position of the infeed duct at the centre of the bottom wall allow the wave motion of the liquid in the filtering chamber to be calmed without the need for further antifoaming substances.
  • this invention has reduced external dimensions as it is no longer necessary to make an enlarged containment tank in order to reduce the wave motion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
EP14165116.6A 2013-06-13 2014-04-17 Filtre à liquide pour aspirateur Withdrawn EP2818087A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000140A ITVR20130140A1 (it) 2013-06-13 2013-06-13 Aspirapolvere con filtraggio a liquido

Publications (1)

Publication Number Publication Date
EP2818087A1 true EP2818087A1 (fr) 2014-12-31

Family

ID=49085179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14165116.6A Withdrawn EP2818087A1 (fr) 2013-06-13 2014-04-17 Filtre à liquide pour aspirateur

Country Status (2)

Country Link
EP (1) EP2818087A1 (fr)
IT (1) ITVR20130140A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113117401A (zh) * 2019-12-31 2021-07-16 添可智能科技有限公司 分离装置和清洁设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999019045A1 (fr) * 1997-10-14 1999-04-22 Miracle Marketing Corporation Systeme sous vide d'ultrafiltration
EP1658801A2 (fr) * 2004-11-19 2006-05-24 Lavorwash S.p.A. Appareil de nettoyage avec filtre fluide
WO2007017821A1 (fr) * 2005-08-05 2007-02-15 Arcelik Anonim Sirketi Aspirateur comportant une combinaison de separateur cyclone et de filtre a liquides
US20080092327A1 (en) 2006-10-18 2008-04-24 Yarbrough Glen A Vacuum cleaner with integrated water filter
EP2362745A1 (fr) 2009-10-27 2011-09-07 Senur Elektrik Motorlari San. Ve Tic. A.S. Ensemble filtre à eau pour aspirateur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999019045A1 (fr) * 1997-10-14 1999-04-22 Miracle Marketing Corporation Systeme sous vide d'ultrafiltration
EP1658801A2 (fr) * 2004-11-19 2006-05-24 Lavorwash S.p.A. Appareil de nettoyage avec filtre fluide
WO2007017821A1 (fr) * 2005-08-05 2007-02-15 Arcelik Anonim Sirketi Aspirateur comportant une combinaison de separateur cyclone et de filtre a liquides
US20080092327A1 (en) 2006-10-18 2008-04-24 Yarbrough Glen A Vacuum cleaner with integrated water filter
EP2362745A1 (fr) 2009-10-27 2011-09-07 Senur Elektrik Motorlari San. Ve Tic. A.S. Ensemble filtre à eau pour aspirateur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113117401A (zh) * 2019-12-31 2021-07-16 添可智能科技有限公司 分离装置和清洁设备

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Publication number Publication date
ITVR20130140A1 (it) 2014-12-14

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