EP2818087A1 - A vacuum cleaner with liquid filtering - Google Patents
A vacuum cleaner with liquid filtering Download PDFInfo
- 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- Withdrawn
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L7/00—Suction 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
- A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
- A47L7/0014—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners with additional means or devices between nozzle and casing
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/18—Liquid filters
- A47L9/181—Separating by passing the air through a liquid bath
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/18—Liquid filters
- A47L9/185—Means 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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Abstract
Description
- This invention relates to a vacuum cleaner with liquid filtering.
- More specifically, this invention relates to the sector of vacuum cleaners with a water filter. In effect, in recent years, the technology has developed of filtering the air sucked by vacuum cleaners using a water filter. It should be noted that, hereafter, reference will be mainly made to the water filter, but without limiting the scope of this invention to the use of that liquid. In effect, other liquids for filtering the air could be used instead of water. According to the prior art, 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. More in detail, 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. In that way, 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.
- In this regard, 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. Some examples of vacuum cleaners with water filters are described in patent documents
US2008/0092327 andEP2362745 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. - For example, in 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 documentEP2362745 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. - In patent document
US2008/0092327 the infeed opening of the duct faces the water and is positioned in a panel-type structure which favours the drying of the flow of air once filtered. - However, these prior art solutions have some drawbacks.
- 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.
- For example, in the case of patent document
EP2362745 , during operation at low air speeds, the air sucked from the outside tends to pass through the further openings positioned above the water level, without performing the filtering. - Other drawbacks of the above-mentioned prior art are linked to the fact that the feeding of air into the water determines an agitation of the latter with a possible consequent formation of foam. This phenomena often translates into the generation of drops of water (spray) which can be transported by the flow of air inside the suction device creating problems for the latter. In order to limit this problem the water is usually mixed with an anti-foam component in such a way as to contain the formation of foam. However, the addition of the anti-foam component complicates the operations for managing the liquid and increases the costs of the filter (every time it is necessary to add the anti-foam component).
- Alternatively, in order to limit the water agitation problem, very large containment tanks are used in such a way that there is sufficient volume to "calm" the water flows. However, this solution is also disadvantageous as it results in an increase in the overall size of the vacuum cleaner which creates problems both for the movement of the vacuum cleaner and for its storage.
- In this situation 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 aims indicated are substantially achieved by a vacuum cleaner with liquid filtering as described in the appended claims.
- Further characteristic features and advantages of this invention are more apparent from the detailed description which follows of a preferred but non-limiting embodiment of a vacuum cleaner with liquid filtering illustrated in the accompanying drawings, in which:
-
Figure 1 is an axonometric side view of a vacuum cleaner according to this invention; -
Figure 2 is a side view in cross section of the vacuum cleaner ofFigure 1 according to a vertical plane; -
Figure 3 is an axonometric view of a first detail of the vacuum cleaner ofFigure 1 ; -
Figure 4 is an axonometric view of a second detail of the vacuum cleaner ofFigure 1 ; and -
Figure 5 is an axonometric view of a third detail of the vacuum cleaner ofFigure 1 ; - With reference to the above mentioned drawings, the
reference numeral 1 denotes in its entirety a vacuum cleaner with liquid filtering according to this invention. - More specifically, the
vacuum cleaner 1 comprises a motor-drivensuction device 2 that creates an inflow of air. More in detail, the motor-drivensuction device 2 comprises amotor 3 and asuction fan 4 connected to themotor 3 which generates the air flow with the activation of themotor 3. Moreover, as is shown inFigure 1 , thesuction device 2 is positioned in aservice compartment 5 having afirst hole 6 and a second hole 7. Thesuction device 2 is configured to generate the flow of air from thefirst hole 6 towards the second hole 7. More in detail, thefirst 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). - As already mentioned, the
vacuum cleaner 1 comprises a filtering chamber 8 (Figure 2 ) having anair inlet section 9, put in fluid communication with the outside environment, and anair outlet section 10. Theair outlet section 10 is in fluid communication with thefirst hole 6 of the service compartment in such a way that thesuction device 2 can extract air through theoutlet section 10. - In that way, a main path is defined for the air inside the
filtering chamber 8 extending from theair inlet section 9 to theair outlet section 10. In other words, the flow of air moves along the main path for making the suction. In yet other words, thesuction device 2 generates a flow of air along the main path in such a way as to suck air through theinlet section 9. - The
filtering chamber 8 is defined at the top by anupper wall 11, laterally byside walls 12 and at the bottom by a containment tank 13 (described below). More specifically, theair outlet section 10 is made at theupper wall 11. Preferably, theoutlet section 10 is made in a substantially central position relative to the surface extension of theupper wall 11. - As already mentioned, the
filtering chamber 8 comprises atank 13 for containing the liquid having abottom wall 14 extending along a surface extension. Preferably, thecontainment tank 13 defines the closing of the lower part of thefiltering chamber 8. - Moreover, the
vacuum cleaner 1 comprises an air infeedduct 15 associated with the air inlet section 9 (to move the air inside the filtering chamber 8) and has an infeedopening 16 positioned inside thefiltering chamber 8. In other words, the air infeedduct 15 extends between anoperational opening 17 positioned on the outside of thefiltering chamber 8 to which asuction pipe 18 or a suction opening is connectable, and an infeedopening 16 which is positioned inside thefiltering chamber 8 to move the sucked air into it. - It should be noted that the main path of the air passes in the
containment tank 13 through the liquid in such a way as to make the filter. - According to this invention, the air infeed
duct 15 extends inside thecontainment tank 13 away from thebottom wall 14 along a direction of extension transversal to the surface area. In other words, theinfeed duct 15 extends through thebottom wall 14 and protrudes relative to it inside thecontainment tank 13. Preferably, theinfeed duct 15 extends away from thebottom wall 14 along a direction of extension substantially at right angles to the surface area. - Preferably, the
infeed duct 15 is positioned in a central position relative to the area of extension of thebottom wall 14 in such a way as to be surrounded by the liquid. Advantageously, the position of the infeedduct 15 determines the maximum distance of the latter relative to theside walls 12 of thefiltering 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). - In addition, as can be seen in
Figure 2 , the infeedopening 16 is distanced from thebottom wall 14 according to predetermined distance in such a way as to emerge from the level of the liquid. In other words, the level of the liquid (when thebottom wall 14 is horizontal) is below the infeedopening 16. - In that way, 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. - Moreover, the
vacuum cleaner 1 comprises anair diversion obstacle 19 facing theinfeed opening 16 and extending, at least partly, transversely relative to a direction of entry of the air from theinfeed opening 16 for diverting the air towards thebottom wall 14 in such a way as to pass the air through the liquid for performing the filtering. - More specifically, the
air diversion obstacle 19 is positioned between theinfeed opening 16 and theupper wall 11 of thefiltering chamber 8. In other words, theair diversion obstacle 19 is positioned in a position above theinfeed opening 16 relative to a vertical direction. - More in detail, the
air diversion obstacle 19 is positioned at theinfeed opening 16 and spaced from it in such a way as to wrap around it. - In the preferred embodiment illustrated for example in
Figures 2 and5 , thediversion obstacle 19 comprises a concave panel above theair infeed opening 16. More specifically, the concave panel forms a cover spaced from theinfeed opening 16. - In addition, the concave panel extends along the area defined by the
entire infeed opening 16 and comprises acentral portion 20 facing theinfeed opening 16 and aside portion 21 extending along theair infeed duct 15. In other words, the concave panel defines substantially a pipe (formed by thecentral portion 20 and the side portion 21) fitted on theinfeed duct 15 and coaxially with the latter. More in detail, the fitted pipe has an internal diameter greater than the diameter of theinfeed duct 15 in such a way as to form slots for passage of the air. - In effect, between the
side portion 21 and theinfeed duct 15 there is aslot 22 for passage of the air diverted (by the diversion obstacle 19) towards the liquid. In that way, during use, the air entering from theinfeed duct 15 strikes against the concave panel and is diverted by it to pass through thepassage slot 22 in the direction of the liquid. In practice, during use, the direction of the air entering through theinfeed duct 15 is reversed by 180°. It should be noted that thecentral portion 20 of the concave panel is substantially of a spherical shape. - More in detail, 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. - Preferably, the distance between the
side portion 21 and theinfeed duct 15 is less than the distance between thecentral portion 20 and theinfeed opening 16 in such as way as to define an acceleration of the air in the section between theside portion 21 and theinfeed duct 15. Advantageously, 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 thecontainment tank 13. - Moreover, the
vacuum cleaner 1 comprises anair diversion structure 23 positioned close to thebottom wall 14 of the tank and outside theinfeed duct 15 as shown inFigure 2 . Thediversion structure 23 has acavity 24 facing thediversion obstacle 19 and shaped for receiving the air diverted by thediversion obstacle 19 and directing it away from thebottom wall 14 in such a way as to remove the air from the liquid. More in detail, thediversion structure 23 is positioned on thebottom wall 14 of thecontainment tank 13 and determines a further diversion of the air which reaches close to thebottom wall 14. - More in detail, the
diversion structure 23 is positioned at the base of theair infeed duct 15 and all around it. In other words, thediversion structure 23 is completely immersed in the liquid. - Preferably, 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 thebottom wall 14. Advantageously, thediversion 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 theinfeed opening 16 to thebottom 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. - In an alternative embodiment, this invention comprises a plurality of pairs of diverters each comprising a
diversion obstacle 19 and adiversion structure 23 positioned consequentially away from the side of theinfeed duct 15 in such a way as to increase even more the time of contact between the air and liquid. - Moreover, the
vacuum cleaner 1 comprises a fragmentation grill 25 (Figures 2 and5 ) spaced from thediversion structure 23 along a direction away from thebottom wall 14. Preferably, thefragmentation grill 25 is positioned above thebottom wall 14 in a vertical direction. - In addition, the
diversion structure 23 extends around theinfeed duct 15 in such a way as to fragment the particles of liquid moved when the air leaves the liquid. More in detail, thefragmentation grill 25 extends substantially parallel to thebottom 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 thediversion structure 23. - Preferably, the
fragmentation grill 25 is positioned at the level of the liquid. Moreover, thefragmentation grill 25 is supported by aside panel 26 which extends from thebottom wall 14 to the edge of the grill. In other words, theside panel 26 which supports thefragmentation grill 25 extends all around theinfeed duct 15 in such a way as to enclose a part of the volume of liquid positioned between theside panel 26 and theinfeed duct 15. - In addition, the
side panel 26 has aslit 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, theslit 27 has a rectangular shape preferably having a length of between 5 cm and 7 cm along theside panel 26 in a direction substantially parallel to thebottom wall 14 and a height of between 1 cm and 2 cm in a direction substantially transversal to thebottom wall 14. - Moreover, in the preferred embodiment illustrated for example in
Figure 5 , thediversion obstacle 19 is a single body with thefragmentation grill 25 and with theside panel 26. - In addition, the
vacuum cleaner 1 comprises a plurality of dampingfins 37 connected to thebottom wall 14 and extending away from it towards theupper wall 11 for a predetermined height in such a way as to dampen the wave motion of the liquid created inside thecontainment tank 13. Preferably, each dampingfin 37 extends at right angles to thebottom wall 14. In the preferred embodiment illustrated for example inFigure 2 , each dampingfin 37 extends away from thebottom wall 14 by a height of between 15 millimetres and 30 millimetres (preferably 25 millimetres). Looking in more detail, each dampingfin 37 has two surfaces opposite and parallel to each other positioned at right angles to thebottom wall 14. It should be noted that each dampingfin 37 is positioned at theside walls 12 and is connected to them in such a way as to fill the angular space between thebottom wall 14 and theside walls 12. - In addition, the damping
fins 37 are positioned in a radiating fashion about the centre of thecontainment tank 13. - Advantageously, 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. - Moreover, the
vacuum cleaner 1 comprises a fragmentation barrier 28 (Figure 4 ) spaced from thefragmentation grill 25 away from thebottom wall 14. Thefragmentation barrier 28 has a plurality ofslits 29 in such a way as to reduce the speed of the moving liquid. It should be noted that thefragmentation barrier 28 is mounted above thefragmentation grill 25 in a vertical direction and is positioned outside the liquid. - In addition, the
fragmentation barrier 28 is concave and forms a concavity facing thefragmentation grill 25. More in detail, thefragmentation barrier 28 has a lateral extension substantially equal to the lateral extension of thefragmentation grill 25. In other words, thefragmentation barrier 28 completely covers thefragmentation grill 25. Preferably, thefragmentation barrier 28 is positioned outside of the liquid. - In addition, the
slits 29 of thefragmentation barrier 28 extend radially from acentral part 30 of thefragmentation barrier 28 towards the edge of thefragmentation barrier 28. - Moreover, the
vacuum cleaner 1 comprises a closed barrier 31 (Figure 3 ) above thefragmentation barrier 28, in a vertical direction, in such a way as to condensate the liquid. In other words, theclosed barrier 31 prevents the passage of the air towards theupper wall 11 of thefiltering chamber 8 after passing thefragmentation barrier 28. - The
closed barrier 31 has a concave shape in a similar fashion to thefragmentation barrier 28 and has a maximum diameter greater than the maximum diameter of thefragmentation barrier 28 in such a way as to cover the top of the latter. It should be noted that theclosed barrier 31 is spaced from thefragmentation 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. - It should also be noted that the
vacuum cleaner 1 comprises aninner wall 32 positioned inside thefiltering chamber 8 and extending from theupper wall 11 towards thecontainment tank 13 for a predetermined length. More specifically, theinner wall 32 extends along theside walls 12 and is spaced from them in such a way as to surround the suction area. In effect, theoutlet section 10 is positioned at theupper wall 11 and is surrounded by theinner wall 32 in such a way that the air is sucked through the space inside theinner wall 32. - Advantageously, the
inner wall 32 prevents the drops of liquid generated by the wave motion at theside walls 12 from being sucked in through theoutlet section 10. - Moreover, the
vacuum cleaner 1 comprises an air-liquid separator filter 33 (Figure 2 ) positioned at theoutfeed section 10 in such a way as to filter any drops of liquid carried by the air. Preferably, theseparator filter 33 is positioned at theupper wall 11 inside theinner wall 32 in such a way as to filter the flow of air relative to drops of liquid still mixed in the air flow. Moreover, thevacuum cleaner 1 comprises astructure 34 for supporting theseparator filter 33 mounted on theclosed barrier 31. In other words, the supportingstructure 34 is positioned between theclosed barrier 31 and theseparator filter 33 and supports theseparator filter 33. Preferably, the supportingstructure 34 is positioned above the closedbarrier 31. - In addition, the supporting
structure 34 has agroove 35 extending between an upper area of thefiltering chamber 8 close to theupper wall 11 and theclosed barrier 31 for draining the drops of liquid. In other words, thegroove 35 collects and channels the drops of water which percolate from the upper area. In effect, the supportingstructure 34 is positioned in a zone in which the movement of air is practically zero, such as the upper part of the closedbarrier 31, in such a way that the drops of liquid percolate towards thecontainment tank 13 without being struck by the flow of air. - Lastly, it should be noted that the
upper wall 11 can be disconnected from the rest of thefiltering chamber 8 so as to fill thecontainment tank 13 with liquid or to perform other operations not explicitly mentioned. In other words, theupper wall 11 is defined by a cover. - In addition, the
upper wall 11 comprises acentral part 36 which is in turn removable from the rest of theupper wall 11, so as to allow the cleaning of theseparator filter 33. In effect, thecentral part 36 faces theseparator filter 33. In other words, thecentral part 36 is positioned inside an extension of theinner 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.
- More in detail, the method comprises a first operating step of preparing a
filtering chamber 8 of the type described above comprising atank 13 for containing the liquid having abottom wall 14. More specifically, the method comprises generating a flow of air along the main path from theair inlet section 9 to theair outlet section 10 and passing through the liquid contained in thecontainment tank 13. - More specifically, 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 thebottom wall 14 and having aninfeed opening 16 positioned above the level of the liquid. In other words, the flow of air enters thefiltering chamber 8 at right angles to thebottom wall 14. - In addition, the method comprises a step of diverting the flow of air entering through the
infeed opening 16 towards thebottom 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 theinfeed opening 16 towards thebottom wall 14. - Moreover, 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 thebottom wall 14 to escape from the liquid. - In addition, 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.
- Lastly, 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 theoutlet section 10. - This invention achieves the preset aims.
- More specifically, the invention allows a vacuum cleaner to be made with liquid filtering wherein the filtering of the air is optimised. In effect, due to the continuous diversions (reversals) of the flow of air at the liquid, the time of contact between the air and water is increased in such a way as to improve the filtering. Moreover, 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.
- Moreover, the invention allows a vacuum cleaner to be made which is able to reduce the liquid agitation phenomenon. In effect, 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. Thus, 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.
- It should also be noticed that this invention is relatively easy to produce and that even the cost connected with implementing the invention is not very high.
Claims (14)
- A vacuum cleaner (1) with liquid filtering, comprising:a suction device (2);a filtering chamber (8) having an air inlet section (9), put in fluid communication with the outside environment, and an air outlet section (10); the inside of the filtering chamber (8) having a main path for the air extending from the air inlet section (9) to the air outlet section (10); the suction device (2) being operatively connected to the air outlet section (10) for generating 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) comprising a tank (13) for containing the liquid having a bottom wall (14) extending along a surface area.an air infeed duct (15) associated with the air inlet section (9) and having an infeed opening (16) positioned inside the filtering chamber (8);characterised in that the air infeed duct (15) extends, at least partly, inside the containment tank (13) away from the bottom wall (14) in a direction of extension transversal to the surface area and the infeed opening (16) being spaced from the bottom wall (14) by a predetermined distance in such a way as to emerge from the level of the liquid; the vacuum cleaner (1) comprising an obstacle (19) for diverting the air facing the infeed opening (16) and extending, at least partly, transversely 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 vacuum cleaner (1) according to claim 1 characterised in that the diversion obstacle (19) comprises a concave panel above the air infeed opening (16).
- The vacuum cleaner (1) according to claim 2 characterised in that the concave panel extends along 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); a slot (22) for passage of the air diverted towards the liquid is defined between the side portion (21) and the infeed duct (15).
- The vacuum cleaner (1) according to claim 3 characterised in that 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.
- The vacuum cleaner (1) according to any one of the preceding claims characterised in that it comprises a structure (23) for diverting the air positioned close to the bottom wall (14) of the tank and outside the infeed duct (15); the diversion structure (23) having an 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.
- The vacuum cleaner (1) according to claim 5 characterised in that the diversion structure (23) is positioned at the base of the air infeed duct (15) and all around it.
- The vacuum cleaner (1) according to claim 5 or 6 characterised in that it comprises a fragmentation grill (25) spaced from the diversion structure (23) and extending around the infeed duct (15) in such a way as to fragment the particles of liquid moved when the air leaves the liquid.
- The vacuum cleaner (1) according to any one of claims 5 to 7 characterised in that it comprises a fragmentation barrier (28) spaced from the fragmentation grill (25) away from the bottom wall (14); the fragmentation barrier (28) having a plurality of slots (29) in such a way as to reduce the speed of the moving liquid.
- The vacuum cleaner (1) according to claim 8 characterised in that the fragmentation barrier (28) is concave and defines a cavity facing the fragmentation grill (25); the slots (29) extending radially starting from a central part of the barrier.
- The vacuum cleaner (1) according to any one of claims 5 to 9 characterised in that it comprises a closed barrier (31) above the fragmentation barrier (28) in such a way as to condensate the liquid.
- The vacuum cleaner (1) according to any one of the preceding claims characterised in that the filtering chamber (8) extends from the bottom wall (14) of the containment tank (13) to an upper wall (11) and has side walls (12); the outlet section (10) being positioned at the upper wall (11) and being surrounded by an inner wall (32) extending from the upper wall (11) towards the containment tank (13) for a predetermined length; the inner wall (32) extending along the side wall and being spaced from it in such a way as to surround the suction area.
- The vacuum cleaner (1) according to any one of the preceding claims characterised in that it comprises an air-liquid separator filter (33) positioned at the outlet section (10) in such a way as to filter any liquid droplets carried by the air.
- A suction method with liquid filtering comprising the following operating steps:- preparing a filtering chamber (8) comprising a tank (13) for containing the liquid having a bottom wall (14);- generating a flow of air along a main path from an air inlet section (9) to an air outlet section (10) and passing through the liquid contained in the containment tank (13);
characterised in that the step of generating the flow of air comprises introducing the flow of air in the filtering chamber (8) through an infeed duct passing through the bottom wall (14) in a direction transversal to the latter; the step of introducing the flow of air in the filtering chamber (8) comprises that it is introduced above the level of the liquid; the method comprising, after introducing the flow of air in the filtering chamber (8), a step of diverting the flow of air introduced towards the bottom wall (14) in such a way that it enters in the liquid for the filtering; the step of diverting the flow of air comprising reversing the direction of propagation of the flow of air in such a way that from the infeed duct (15) it moves towards the bottom wall (14). - The suction method according to claim 13, characterised in that it 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.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000140A ITVR20130140A1 (en) | 2013-06-13 | 2013-06-13 | VACUUM CLEANER WITH LIQUID FILTER |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2818087A1 true EP2818087A1 (en) | 2014-12-31 |
Family
ID=49085179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14165116.6A Withdrawn EP2818087A1 (en) | 2013-06-13 | 2014-04-17 | A vacuum cleaner with liquid filtering |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2818087A1 (en) |
IT (1) | ITVR20130140A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113117401A (en) * | 2019-12-31 | 2021-07-16 | 添可智能科技有限公司 | Separating device and cleaning apparatus |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999019045A1 (en) * | 1997-10-14 | 1999-04-22 | Miracle Marketing Corporation | Ultra-filtration vacuum system |
EP1658801A2 (en) * | 2004-11-19 | 2006-05-24 | Lavorwash S.p.A. | Cleaning apparatus with liquid filter |
WO2007017821A1 (en) * | 2005-08-05 | 2007-02-15 | Arcelik Anonim Sirketi | A vacuum cleaner comprising a combination of a cyclone separator and a liquid filter |
US20080092327A1 (en) | 2006-10-18 | 2008-04-24 | Yarbrough Glen A | Vacuum cleaner with integrated water filter |
EP2362745A1 (en) | 2009-10-27 | 2011-09-07 | Senur Elektrik Motorlari San. Ve Tic. A.S. | Water filter arrangement for a vacuum cleaner |
-
2013
- 2013-06-13 IT IT000140A patent/ITVR20130140A1/en unknown
-
2014
- 2014-04-17 EP EP14165116.6A patent/EP2818087A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999019045A1 (en) * | 1997-10-14 | 1999-04-22 | Miracle Marketing Corporation | Ultra-filtration vacuum system |
EP1658801A2 (en) * | 2004-11-19 | 2006-05-24 | Lavorwash S.p.A. | Cleaning apparatus with liquid filter |
WO2007017821A1 (en) * | 2005-08-05 | 2007-02-15 | Arcelik Anonim Sirketi | A vacuum cleaner comprising a combination of a cyclone separator and a liquid filter |
US20080092327A1 (en) | 2006-10-18 | 2008-04-24 | Yarbrough Glen A | Vacuum cleaner with integrated water filter |
EP2362745A1 (en) | 2009-10-27 | 2011-09-07 | Senur Elektrik Motorlari San. Ve Tic. A.S. | Water filter arrangement for a vacuum cleaner |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113117401A (en) * | 2019-12-31 | 2021-07-16 | 添可智能科技有限公司 | Separating device and cleaning apparatus |
Also Published As
Publication number | Publication date |
---|---|
ITVR20130140A1 (en) | 2014-12-14 |
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