EP2270272B1 - Waschmaschine - Google Patents

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Publication number
EP2270272B1
EP2270272B1 EP20090008485 EP09008485A EP2270272B1 EP 2270272 B1 EP2270272 B1 EP 2270272B1 EP 20090008485 EP20090008485 EP 20090008485 EP 09008485 A EP09008485 A EP 09008485A EP 2270272 B1 EP2270272 B1 EP 2270272B1
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EP
European Patent Office
Prior art keywords
drum
lifters
tub
rotation
washing
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.)
Active
Application number
EP20090008485
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English (en)
French (fr)
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EP2270272A1 (de
Inventor
Daniele Favaro
Mauro Cinello
Danny Buso
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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.)
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Publication date
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP20090008485 priority Critical patent/EP2270272B1/de
Priority to EP12167119.2A priority patent/EP2489773B1/de
Publication of EP2270272A1 publication Critical patent/EP2270272A1/de
Application granted granted Critical
Publication of EP2270272B1 publication Critical patent/EP2270272B1/de
Active legal-status Critical Current
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/02—Rotary receptacles, e.g. drums
    • D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
    • D06F37/06—Ribs, lifters, or rubbing means forming part of the receptacle
    • D06F37/065—Ribs, lifters, or rubbing means forming part of the receptacle ribs or lifters having means for circulating the washing liquid
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/206—Mounting of motor

Definitions

  • the present invention refers to a washing machine, particularly a laundry washing machine.
  • laundry washing machines comprises an external casing containing a washing tub in which a rotary perforated drum is placed, adapted for loading the laundry to be washed.
  • the drum is provided with some lifters (called also elevators, or ribs, or diverter), adapted to improve the stirring of the laundry during the rotation of the drum;
  • the lifters are substantially prismatic elements fixed to the inner face of the lateral surface of the drum, and positioned with their longitudinal axis substantially parallel to the rotation axis of the drum.
  • One of the parameters which affect the quality of the wash in a washing machine is the wetting of the laundry; in fact, in order to obtain an optimal wash of the laundry, it is important that its wetting is as uniform as possible.
  • Another parameter which affects the quality of the wash is the temperature of the washing liquid (i.e. water, or water mixed with washing/rinsing products) in contact with the laundry; the temperature of the washing liquid in contact with the laundry should be also in this case as uniform as possible in order to obtain an optimal wash.
  • the washing liquid i.e. water, or water mixed with washing/rinsing products
  • both the wetting of the laundry and the temperature of the washing liquid in contact with the laundry are typically higher at the periphery of the drum, and lower in the middle of the latter, particularly in the full load condition, which results in worse washing performances, in a longer wash cycle, and in higher water and energy consumptions.
  • washing machines are provided with re-circulating means that are adapted to lift up the washing liquid from the bottom of the tub and to pour it again and again into the drum, preferably into and through the washload itself, in view of enhancing the effectiveness of the washing action, while reducing both energy and water usage.
  • Machines of this kind are particularly efficient and their diffusion and popularity on the marketplace are indicative of them being largely accepted by the consumers, actually.
  • these machines generally referred to as "re-circulating type” machines in the art, have an obvious major drawback in that they are significantly more expensive than traditional designs, since they require the construction of a re-circulating circuit, along with the pump and the various devices and arrangements associated thereto.
  • This solution provides that the lifters are hollow and that they are provided, on their surface, of some apertures or holes; in this solution the internal of the lifters fluidly communicates with the external of the drum via the openings provided on the lateral surface of the drum in order to allow the washing liquid contained in the tub to flow into and out of the drum.
  • the washing liquid enters the lifter via the openings present in the lateral cylindrical surface of the drum, and, while the lifter is taken aloft by the rotation of the drum, the washing liquid is discharged inside the drum through the apertures or holes provided on the lifter.
  • US 6,386,004 discloses a laundry drum, comprising a liquid diverter (i.e. a lifter or elevator) including a driver having a driver interior and a run-off ramp therein.
  • the driver interior receives liquid scooped and lifted by the drum during its rotation.
  • the driver discharges the scooped liquid, in its lifted position, into the drum interior.
  • the run-off ramp is oriented horizontally or has a descending gradient when the drum rotation axis is orientated in a direction deviating from horizontal, and when the drum is in a rotary position in which the driver is in its highest position, and thereby permits, in all of the drum's rotation directions, a flow of scooped liquid on the run-off ramp in a direction of a rising part of the rotation axis when in the driver's lifted position.
  • the liquid is conducted into only part of the drivers in a case of low liquid level as a result of the inclination.
  • EP 0 360 059 discloses a water-saving apparatus comprising a drum, contained in a tub, possessing a scooping ring of a relatively large diameter, mounted on a drum end wall (i.e. a base of the drum), with radially disposed scooping compartments; these scooping compartments dip into the liquor level underneath the drum, and with the aid of a laterally disposed scooping compartment, feed openings, and drum inlet openings, convey the washing liquor from the bottom of the tub to the textile goods by virtue of the rotation of the drum.
  • washing liquor is introduced into the tub from drum inlet openings provided in proximity of the drum end wall (or base), and therefore such washing liquor wets mainly the portion of the laundry placed near to these openings, while the wetting is reduced in the portion of the laundry which is farther from the end wall (or base) of the drum.
  • DE 43 26 496 discloses a washing machine comprising a tub containing a drum provided, on its rear base, with a supporting star (i.e. the so called “spider"), the arms of which, when passing through lye (i.e. the washing liquid) located in the tub bottom, scoop up some of this lye and, during the further rotation of the drum, lift it and guide it to perforations which are arranged in the rear base of the drum in the vicinity of the hub of the supporting star.
  • lye i.e. the washing liquid
  • this solution has a drawback; in fact the washing liquid is introduced into the tub from perforations arranged in the rear base of the drum, in the vicinity of the hub of the supporting star, and therefore such washing liquid wets mainly the portion of the laundry placed near to these perforations, while the wetting is reduced in the portion of the laundry which is farther from the rear base of the drum.
  • EP 0 304 391 discloses a washing machine comprising a drum, on which scoop-shaped water-inlet orifices are arranged underneath the drum ribs (i.e. lifters); the drum ribs fill with washing fluid from the free liquor during the washing operation.
  • the drum ribs In the drum ribs there are also water-outlet orifices, through which the fluid can trickle onto the laundry again during the further drum rotation.
  • the water-inlet orifices are effective in both directions of rotation of the drum.
  • the water-inlet orifices are designed as scoop elements shaped out from the drum casing. The water-inlet orifices are aligned alternately in order to take effect in both directions of rotation of the drum.
  • the washing fluid is scooped mainly in correspondence of the lateral cylindrical surface of the drum, and the mixing of the washing fluid, and therefore the equalizing effect on the temperature of the washing fluid in contact with the laundry, is very low.
  • Document D1 DE-U-20023048 discloses a washing machine comprising a washing tub containing a drum, said drum comprises one or more hollow lifters protruding from said lateral surface towards the internal of said drum and provided with one or more outlet openings adapted to fluidly connect the internal of said one or more lifters to the internal of said drum in order to allow the release of a liquid contained in said one or more lifters inside said drum when said one or more lifters are in an upper region of said tub, said drum further comprises a base and a lateral surface provided with apertures adapted for allowing the washing liquid present in a rear and bottom region of said tub to flow into said hollow filters during the rotation of said drum.
  • the aim of the present invention is therefore to improve the uniformity of the wetting of the laundry and of the temperature of the water in contact with the laundry contained in the drum of a washing machine, so as to increase the washing performances.
  • Another object of the invention is to reduce the duration, the water consumption, and the power consumption of the washing cycles.
  • Another object of the invention is the possibility to improve the wetting of the laundry and of the temperature of the water in contact with the laundry also in a standard washing machine, by modifying only the drum of the latter, and not the tub.
  • the Applicant has found that by placing the lifters of a drum of a washing machine (such lifter being hollows and provided with one or more outlet openings adapted to fluidly connect the internal of the lifters to the internal of the drum in order to allow the release of the washing liquid inside the drum when the more lifters are in the upper region of the tub), in a region of the lateral surface of such a drum which is not provided with apertures adapted for allowing a washing liquid contained in a tub to flow into and out of the drum, and by providing inlet apertures on a base of such drum, fluidly connecting the lifters to the external of the drum so as to allow, during the rotation of the drum, the washing liquid present in a rear and bottom region of the tub to enter the lifters, it is possible to obtain a recirculation of the washing liquid which ensures an uniform wetting of the laundry and of the temperature of the washing liquid in contact with the laundry.
  • a washing machine comprising a washing tub containing a drum comprising a base and a lateral surface with one or more first regions provided with apertures adapted for allowing a washing liquid contained in the tub to flow into and out of the drum, the lateral surface comprising one or more second regions which are not provided with the apertures adapted for allowing a washing liquid contained in the tub to flow into and out of the drum, the drum comprising one or more lifters, hollow, protruding from the lateral surface towards the internal of the drum and provided with one or more outlet openings adapted to fluidly connect the internal of the one or more lifters to the internal of the drum in order to allow the release of a liquid contained in the one or more lifters inside the drum when the one or more lifters are in an upper region of the tub; the one or more lifters are associated with the one or more second regions of the lateral surface , the base of the drum 1 being provided with one
  • a washing machine comprising a washing tub containing a drum comprising a lateral surface and a base connected to a spider member comprising a central region from which a plurality of arms radially protrudes, the drum comprising one or more lifters, hollow, protruding from the lateral surface towards the internal of the drum, and provided with one or more outlet openings adapted to fluidly connect the internal of the lifter to the internal of the drum in order to allow the release of a liquid contained in the one or more lifters inside the drum when the one or more lifters are in an upper region of the tub; the spider member is provided with scooping means adapted, during the rotation of the drum, to collect the washing liquid from the rear and bottom region of the tub and to guide the washing liquid into the internal of the lifter.
  • a washing machine not illustrated, according to the invention, comprises a tub 2 containing a drum 1 comprising a base 3 (i.e. a end wall or surface), which is advantageously substantially perpendicular to the rotational axis 4 of the drum 1, and a lateral surface 5 (substantially cylindrical) provided with one or more first regions 200 provided with apertures 6 adapted for allowing a washing liquid (e.g. water, or water mixed with washing/rinsing products) contained in the tub 2 to flow into and out of the drum 1.
  • a washing liquid e.g. water, or water mixed with washing/rinsing products
  • the drum 1 comprises also one or more second regions 100 which are not provided with apertures adapted for allowing a washing liquid contained in the tub 2 to flow into and out of the drum 1.
  • the drum 1 illustrated in the enclosed Figures is of the type adapted to be used in a front-loading washing machine, that is a washing machine, not illustrated, provided with and external casing, typically parallelepiped-shaped, on which frontal wall an opening is provided, facing a further opening obtained in the tub 2; the drum 1 is placed into the tub 2 in such a way that its opened end 7 (that is the end of the drum 1 opposite to the base 3) faces the opening of the tub 2, so that the laundry can be loaded in the drum 1 via its opened end 7.
  • the first openings of the external casing and of the tub 2 are closable by an external lid, not illustrated, hinged to the upper surface of the external casing.
  • washing machine of the so-called top-loading type that is a washing machines comprising a casing, typically parallelepiped-shaped on the upper surface of which an opening is obtained, facing a further opening obtained in the lateral surface of the tub; these openings are closable by an external lid, hinged to the upper surface of the external casing.
  • the drum 1 is also provided with a further base, not illustrated, substantially equal to the base 3, which closes also the opened end 7 of the drum 1; in this case, therefore, the drum 1 is closed in correspondence of both its bases, and the laundry can be loaded into the drum 1 via a suitable opening, not illustrated, obtained in the lateral surface 5 of the drum 1, an closable by one or more internal lids, also not illustrated, which, when closed, substantially constitute a portion of the lateral surface 5 of the drum 1.
  • the drum 1 comprises one or more lifters 8 (or elevators, or ribs, or diverter), hollow (i.e. box-shaped end empty), protruding from inner face 5a of the lateral surface 5 towards the internal of the drum 1, and provided with one or more outlet openings 9 adapted to fluidly connect the internal of the lifters 8 to the internal of the drum 1 in order to allow the release of a liquid contained in such one or more lifters 8 inside the drum 1 when the one or more lifters 8 are in an upper region 2b of the tub 2.
  • lifters 8 or elevators, or ribs, or diverter
  • hollow i.e. box-shaped end empty
  • each lifter 8 is associated with one of the one or more second regions 100 of the lateral surface 5 of the drum 1 which are not provided with the apertures 6; this means that the washing liquid can't flow into (and therefore nor flow out of) a lifter 8 through the lateral surface 5 of the drum 1.
  • the lifters 8 may be associated with the first regions 200 of the lateral surface 5 of the drum 1 provided with the apertures 6, so that the washing liquid can also flow into/out of these lifters through the lateral surface 5.
  • the lifters 8 are distributed in an orderly arrangement along the inner face 5a of the lateral surface 5 of the drum 1; in the embodiment illustrated in Figures 1 to 10 there are three lifters 8, but it is clear that, according to the invention, any number of lifters (even only one) can be used. Clearly, the lifters 8 could be also distributed in a non-orderly arrangement along the inner face 5a of the lateral surface 5 of the drum 1.
  • the lifters 8 are "box-shaped” (or “sell-shaped” or “doomed-shaped”), so that a liquid can be collected in their inside.
  • each lifter 8 is, in a plan view, substantially trapezoidal, and it is provided with two lateral walls 10a and 10b, inclined relative to each other, and connected, respectively in correspondence of a frontal end 11a and of a rear end 11b of the lifter 8, by a frontal wall 12a and by a rear wall 12b.
  • the lateral walls 10a and 10b, the frontal wall 12a and the rear wall 12b are connected by a flowing surface 13, adapted to guide a washing liquid contained in the lifter 8 towards the outlet openings 9; preferably the flowing surface 13 is inclined in such a way to guide a washing liquid contained in the lifter 8 towards the frontal end 11 a of the lifter 8 when, during the rotation of the drum 1, the lifter 8 is in the upper region 2b of the tub 2.
  • the above mentioned outlet openings 9 are advantageously provided on the lateral walls 10a, 10b, on the frontal wall 12a, and on the flowing surface 13 of the lifters 8.
  • the lifters 8 are fixed to the inner face 5a of the lateral surface 5 of the drum 1 with their opened border, numbered 14 in the enclosed figures, opposite to the flowing surface 13.
  • the lifters 8 are fixed to the inner face 5a of the lateral surface 5 of the drum 1 by suitable fixing means, comprising, for example, suitable screw or rivets, not illustrated, and/or by gluing, and/or by welding, and/or by snap-fittings means, comprising, for example, suitable pawls (or pins or hooks) 15 protruding from the lifters 8 and adapted to snap fit with suitable seats 16 provided on the lateral surface 5 of the drum 1.
  • suitable fixing means comprising, for example, suitable screw or rivets, not illustrated, and/or by gluing, and/or by welding
  • snap-fittings means comprising, for example, suitable pawls (or pins or hooks) 15 protruding from the lifters 8 and adapted to snap fit with suitable seats 16 provided on the lateral surface 5 of the drum 1.
  • these pawls 15 substantially obstruct the respective seats 16, and therefore at most a very small quantity of the washing liquid can flow into and out of the drum 2 through the clearances which should be present between the seats 16 and the pawls 15; in other words the seats 16 aren't intended for allowing the washing liquid contained in the tub 2 to flow into and out of the drum 1, even if a small quantity of such a liquid should flow through the possible clearances between the seats 16 and the pawls 15.
  • the lifters 8 are fixed to the drum 1 in such a way that their lateral surface engages (i.e. touches or is in contact with) the base 3 of the drum 1.
  • the drum 1 comprises a further base, not illustrated, which closes also the opened end 7 of the drum 1, the lifters 8 could engage (i.e. touch or be in contact with) one or both the base 3 and the further base of the drum 1.
  • the lifters 8 are separated from the base 3 of the drum 1 (and also from the further base in the case of a top-loading washing machine).
  • the base 3 is provided with one or more inlet apertures 17 fluidly connecting the lifters 8 to the external of the drum 1, so as to allow, during the rotation of the drum 1, the washing liquid present in a rear and bottom region 2a of the tub 2 to enter one lifter 8, in order to allow the release of the washing liquid inside the drum 1, when such a lifter 8 is in the upper region 2b of the tub 2, advantageously through the one or more outlet openings 9.
  • an inlet aperture 17 is obtained in each region of the base 3 which engages the rear wall 12b of a lifter 8; in this case, in the rear wall 12b of each lifter 8, a inlet hole 18 is obtained, facing the corresponding inlet aperture 17, so that a liquid can flow into the lifter 8 through the inlet aperture 17 and the inlet hole 18 facing this inlet aperture 17.
  • one or more inlet apertures 17 may be associated to a single lifter 8.
  • the lifters 8 aren't provided with a rear wall, and they are connected to the base 3 in correspondence of the border of the lateral walls 10a, 10b and of the flowing surface 13; in this case each inlet aperture 17 is arranged in such a way that it directly communicates with the internal of one lifter 8.
  • the lifters 8 doesn't engage the base 3, and the internal of each lifter 8 is fluidly connected to one or more inlet apertures 17 obtained in the base 3 by connecting means comprising, for example, a pipe or a duct, not illustrated, connecting these one ore more inlet apertures 17 to the internal of the lifter 8.
  • one ore more inlet apertures 17 may be obtained in the base 3 and/or in the further base closing the drum 1, and such apertures 17 can communicate with the internal of the lifters 8, for example via suitable inlet holes obtained in the lifters 8 and facing the corresponding inlet aperture 17.
  • the one or more inlet apertures 17 can be arranged in such a way that they directly communicate with the internal of the lifter 8.
  • the lifters 8 may also be separated from the base 3 and/or from the further base of the drum 1; in this case one ore more inlet apertures 17 may be obtained in the base 3 and/or in the further base closing the drum 1, and such apertures 17 may communicate with the internal of the lifters 8 also by connecting means comprising, for example, a pipe or a duct, not illustrated, connecting these one ore more inlet apertures 17 to the internal of the lifters 8.
  • a liquid may therefore flow into a lifter 8, from the rear and bottom region 2a of the tub 2 only via one or more inlet apertures 17, and therefore not through the lateral (cylindrical) surface 5 of the drum 1; in fact each lifter 8 is associated to the drum 1 in correspondence of a second region 100 of the latter which is not provided with apertures adapted for allowing a washing liquid contained in the tub 2 to flow into and out of the drum 1, and therefore the washing liquid may flow into such lifter 8 only via the one ore more inlet apertures 17 associated to said lifter 8.
  • the drum 1 comprises scooping means adapted, during the rotation of the drum 1, to collect the washing liquid from the rear and bottom region 2a of the tub 2 and to guide the washing liquid into the internal of the lifter 8 through the one or more apertures 17.
  • the base 3 of the drum 1 is connected to a spider member 19 (or supporting star) comprising a central region 20 from which a plurality of arms 21 radially protrudes, fixed to the outer face 3a of the base 3.
  • the central region 20 of the spider member 19 is fixed to a shaft 32, adapted to cross the tub 2, so as to be connected, directly of by a suitable belt pulley, to a motor, not illustrated, for allowing the rotation of the drum 1.
  • the above mentioned scoping means are provided in/at the spider 19, particularly in/at the arms 21 of the latter; in this case the number of the arms 21 is advantageously equal to the number of the lifters 8, and the free end of each arm 21 is fixed to the base 3 in proximity of the one or more inlet apertures 17 (only one in the embodiment illustrated in Figures 1 to 10 ) associated to one lifter 8.
  • the scoping means comprises, for each arm 21, a conveyor element 22 (i.e. a blade, or paddle, or bucket) protruding laterally from the free end of this arm 21, and arranged to cover the one or more inlet apertures 17, in such a way to define a guide or a duct 122a which, during the rotation of the drum 1 in one of the directions of rotation, as will be explained in the following, guides the liquid contained in the rear and bottom region 2a of the tub 2 towards the one or more inlet apertures 17 covered by the conveyor element 22, and therefore into the respective lifter 8.
  • a conveyor element 22 i.e. a blade, or paddle, or bucket
  • all the conveyor elements 22 protrude from a same lateral side (i.e. the right side or the left side) of the arms 21, in order to scoop the liquid contained in the rear and bottom region 2a of the tub 2 only during the rotation of the drum 1 in a specific direction of rotation (called scooping direction), and not in the other direction of rotation.
  • the conveyor elements 22 are advantageously paddle-shaped, and comprise a curved surface 23 adapted to guide a liquid towards the inlet apertures 17 while the conveyor element 22 moves in this liquid in a prefixed direction.
  • the scooping means aren't associated to the spider 19; in this case one or more conveyor elements, not associated to the spider 19, are provided on the base 3 in proximity of the one or more inlet apertures 17; these one or more conveyor elements are adapted to guide, during the rotation of the drum 1 in the scooping direction, the liquid contained in the rear and bottom region 2a of the tub 2 towards the one or more inlet apertures 17, and therefore into the lifters 8 fluidly communicating with these one or more inlet apertures 17.
  • some of the scoping means are associated to the spider 19, and other scoping means aren't associated to the spider 19.
  • Figure 1 schematically illustrates part of the tub 2 and of the drum 1 of a a washing machine according to the invention.
  • the scooping means in this case the conveyor elements 22 associated to the arms 21 of the spider 19
  • the conveyor elements cyclically immerge in the liquid contained in the rear and bottom region 2a of the tub 2; if the drum 1 rotates in the scooping direction (for example, with reference to Figure 4 , the scooping direction is counter-clock), the conveyor elements, while moving through the washing liquid contained in the rear and bottom region 2a of the tub, scoop the washing liquid and convey it towards the inlet apertures 17 covered by such conveyor elements 22, and therefore into the lifters 8 associated to these inlet apertures 17.
  • this lifter 8 is lifted and taken in an upper position (which is for example the position of the lifter numbered 8a in enclosed Figure 1 ), in which it is placed in the upper region 2b of the tub 2.
  • Figures 11 to 18 illustrate a further embodiment of the invention, which, as will be explained in the following, differs from the embodiment illustrated in Figures 1 to 10 because of the shape of the lifters 8 and of the spider 19, and because of number and position of the inlet apertures obtained in the base 3, and of the scooping means.
  • the lifters 8 comprises two lateral walls 10a and 10b, inclined relative to each other, so as to join each other along a common side and to define a flowing surface 13, adapted to guide a washing liquid contained in the lifter 8 towards the outlet openings 9 during the rotation of the drum 1; preferably the flowing surface 13 is inclined in such a way to guide a washing liquid contained in the lifter 8 towards the frontal end 11a of the lifter 8 when, during the rotation of the drum 1, the lifter 8 is in the upper region 2b of the tub 2.
  • the lateral walls 10a and 10b are also connected each other, respectively in correspondence of a frontal end 11a and of a rear end 11b of the lifter 8, by a frontal wall 12a and by a rear wall 12b.
  • the outlet openings 9, adapted to fluidly connect the internal of the lifters 8 to the internal of the drum 1, are advantageously provided on the lateral walls 10a, 10b and on the frontal wall 12a of the lifters 8.
  • each lifter 8 there is situated a partition wall 24, which bisects the lifter 8 lengthwise, thereby creating two chambers 25a, 25b.
  • each chamber 25a, 25b fluidly communicates with the internal of the drum 1 via one or more of the outlet openings 9.
  • the partition wall 24 is arranged in such a way that the chambers 25a and 25b are fluidly separated one another; in another embodiment, not illustrated, the partition wall 24 is arranged in such a way that the chambers 25a and 25b are fluidly connected one another.
  • the partition wall 24 is a planar, rectangular member, which is arranged with the major side thereof joining with the flowing surface 13; preferably the partition wall 24, in proximity of the rear wall 12b of the lifter 8, divides in two curved arms 24a, 24b, diverging each other and connected to the second wall 12b.
  • the lifters 8 are fixed to the inner face 5a of the lateral surface 5 of the drum 1 by suitable fixing means, comprising, for example, suitable screw or rivets, not illustrated, and/or by snap-fittings means, also not illustrated.
  • the lifters 8 are fixed to the drum 1 in such a way that their rear wall 12b engages (i.e. touches or is in contact with) the base 3 of the drum 1.
  • the base 3 is advantageously provided, for each lifter 8, with at least one inlet aperture 17a, and at least one inlet aperture 17b, fluidly communicating respectively with the two chambers 25a, 25b defined inside the lifter 8.
  • each lifter 8 two inlet holes 18a, 18b are obtained, facing the corresponding inlet apertures 17a, 17b, so that a liquid can flow into the two chambers 25a, 25b defined inside the lifter 8, respectively through the inlet apertures 17a, 17b and the inlet holes 18a, 18b facing these inlet apertures 17a, 17b.
  • the lifters 8 doesn't engage the base 3, and the two chambers 25a, 25b of a lifter 8 are fluidly connected, respectively to one ore more inlet apertures 17a, 17b obtained in the base 3, by connecting means comprising, for example, pipes or a ducts, not illustrated, connecting these one ore more inlet apertures 17a, 17b respectively to the internal of the two chambers 25a, 25b.
  • the washing machine is of the top-loading type and the drum 1 comprises a further base, not illustrated, which closes also the opened end 7 of the drum 1, and in which the lifters 8 engage (i.e. touch or be in contact with) both the base 3 and the further base of the drum 1, for each lifter 8 one ore more inlet apertures 17a, 17b may be obtained in the base 3 and/or in the further base closing the drum 1, and such apertures 17a, 17b may communicate respectively with the internal of the two chambers 25a, 25b defined inside the lifter 8 via suitable inlet holes obtained in the lifters 8 and facing the corresponding inlet aperture 17a, 17b.
  • the lifters 8 may also be separated from the base 3 and/or from the further base of the drum 1; in this case, for each lifter 8, one ore more inlet apertures 17a, 17b may be obtained in the base 3 and/or in the further base closing the drum 1, and such apertures 17a, 17b may communicate respectively with the two chambers 25a, 25b defined inside the lifter 8 also by connecting means comprising, for example, pipes or ducts, not illustrated, connecting these one ore more inlet apertures 17a, 17b respectively to the internal of the two chambers 25a, 25b.
  • a liquid may flow into a lifter 8 only via one or more inlet apertures 17a, 17b, and therefore not through the lateral surface 5 of the drum 1; in fact each lifter 8 is associated to the drum 1 in correspondence of a second region 100 of the latter which is not provided with apertures adapted for allowing a washing liquid contained in the tub 2 to flow into and out of the drum 1, and therefore the washing liquid may flow into such lifter 8 only via the one ore more inlet apertures 17a, 17b associated to said lifter 8.
  • a liquid contained in a lifter 8 can exit the latter only via the outlet openings 9.
  • the lifters 8 are associated with the one or more first regions 200 of the lateral surface 5 of the drum 1 provided with the apertures 6, so that the washing liquid can also flow into/out of these lifters 8 through the lateral surface 5.
  • the base 3 of the drum 1 is connected to a spider member 19 (or supporting star) comprising a central region 20 from which a plurality of arms 21 radially protrudes, fixed to the outer face 3a of the base 3; the central region 20 of the spider member 19 is fixed to a shaft 32, adapted to cross the tub 2 and to be connected, directly of by a suitable belt pulley, to a motor, not illustrated, for allowing the rotation of the drum 1.
  • a spider member 19 or supporting star
  • the central region 20 of the spider member 19 is fixed to a shaft 32, adapted to cross the tub 2 and to be connected, directly of by a suitable belt pulley, to a motor, not illustrated, for allowing the rotation of the drum 1.
  • the scoping means are advantageously provided in/at the spider 19, particularly in/at the arms 21 of the latter; also in this case the number of the arms 21 is equal to the number of the lifters 8, and the free end of each arm 21 is fixed to the base 3 in proximity of the one or more inlet apertures 17a, 17b associated to each lifter 8.
  • the scoping means comprises, for each arm 21, two conveyor elements 22a, 22b (i.e. two blades, or paddles, or buckets) protruding laterally from the free end of this arm 21, and arranged to cover the one or more inlet apertures 17a, 17b, in such a way to define two guides or ducts 222a, 222b which, during the rotation of the drum 1, depending on the direction of rotation of the drum 1, guides the liquid contained in the rear and bottom region 2a of the tub 2 towards one or the other inlet apertures 17a, 17b, and therefore into one or the other of the two chambers 25a, 25b defined inside each lifter 8.
  • two conveyor elements 22a, 22b i.e. two blades, or paddles, or buckets
  • the liquid can be scooped from the rear and bottom region 2a of the tub 2 during the rotation of the drum in both the directions of rotation, which consequently are both scooping directions.
  • the partition wall 24 isn't provided, and the washing liquid, flowing through the one or more inlet apertures 17a or 17b associated to a lifter 8, collects inside this lifter 8.
  • the conveyor elements 22a, 22b are advantageously paddle-shaped, and comprise a curved surface 23 adapted to guide a liquid towards the respective inlet opening 17a or 17b, depending on the direction of rotation of the drum 1.
  • the scooping means aren't associated to the spider 19; in this case the inlet apertures 17a, 17b associated to each lifter 8 may be provided with one or more conveyor elements, not associated to the spider 19, adapted to guide, during the rotation of the drum 1, depending on the direction of rotation, the liquid contained in the bottom 2a of the tub 2, towards one ore the other inlet apertures 17a, 17b associated to the same lifter 8.
  • the recirculation of the the washing liquid allows to reduce the water consumption and the power consumption of the washing cycles, without using an expensive re-circulating circuit.
  • washing machine according to the invention may be also obtained, starting from a "standard” washing machine, by replacing the drum of the latter with a drum obtained according to the invention, substantially without any modification of the tub and of the rest of the washing machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Claims (13)

  1. Waschmaschine, umfassend einen Waschbottich (2), der eine Trommel (1) enthält, die eine Basis (3) und eine laterale Fläche (5) mit einem oder mehreren ersten Bereichen (200) umfasst, die mit Öffnungen (6) versehen sind, die so ausgelegt sind, dass sie es ermöglichen, dass eine im Bottich (2) enthaltene Waschflüssigkeit in die und aus der Trommel (1) fließt, wobei die laterale Fläche (5) einen oder mehrere zweite Bereiche (100) umfasst, welche nicht mit den Öffnungen (6) versehen sind, die so ausgelegt sind, dass sie es ermöglichen, dass eine im Bottich (2) enthaltene Waschflüssigkeit in die und aus der Trommel (1) fließt, wobei die Trommel (1) eine oder mehrere Hebeeinrichtungen (8) umfasst, die hohl sind, von der lateralen Fläche (5) in Richtung des Inneren der Trommel (1) vorstehen und mit einer oder mehreren Auslassöffnungen (9) versehen sind, die so ausgelegt sind, dass sie das Innere der einen oder der mehreren Hebeeinrichtungen (8) mit dem Inneren der Trommel (1) in Flüssigkeitsverbindung setzen, um die Freigabe einer Flüssigkeit zu ermöglichen, die in der einen oder den mehreren Hebeeinrichtungen (8) innerhalb der Trommel (1) enthalten ist, wenn die eine oder die mehreren Hebeeinrichtungen (8) in einem oberen Bereich (2b) des Bottichs (2) sind,
    dadurch gekennzeichnet, dass
    die eine oder die mehreren Hebeeinrichtungen (8) mit dem einen oder den mehreren zweiten Bereichen (100) der lateralen Fläche (5) verbunden sind, wobei die Basis (3) der Trommel (1) mit einer oder mehreren Einlassöffnungen (17, 17a, 17b) versehen ist, welche die eine oder die mehreren Hebeeinrichtungen (8) mit der Außenseite der Trommel (1) in Flüssigkeitsverbindung setzen, um während der Drehung der Trommel (1) zu ermöglichen, dass die in einem hinteren und unteren Bereich (2a) des Bottichs (2) vorhandene Waschflüssigkeit in die eine oder die mehreren Hebeeinrichtungen (8) eintritt.
  2. Waschmaschine nach Anspruch 1, dadurch gekennzeichnet, dass sie Schöpfmittel umfasst, die so ausgelegt sind, dass sie während der Drehung der Trommel (1) eine Waschflüssigkeit aus dem hinteren und unteren Bereich (2a) des Bottichs (2) sammeln und die Waschflüssigkeit über die eine oder die mehreren Einlassöffnungen (17, 17a, 17b) in das Innere der Hebeeinrichtungen (8) führen.
  3. Waschmaschine nach Anspruch 2, dadurch gekennzeichnet, dass das Schöpfmittel auf der Basis (3) in unmittelbarer Nähe der einen oder der mehreren Einlassöffnungen (17, 17a, 17b) vorgesehen ist.
  4. Waschmaschine nach Anspruch 2, umfassend ein Drehkreuzelement (19), das mit der Basis (3) verbunden ist und einen mittigen Bereich (20) umfasst, von welchem eine Mehrzahl von Armen (21) radial vorsteht, wobei das Drehkreuzelement (19) die Schöpfmittel umfasst.
  5. Waschmaschine nach Anspruch 4, dadurch gekennzeichnet, dass das Schöpfmittel mindestens ein Förderelement (22, 22a, 22b) umfasst, das an/auf mindestens einem Arm (21) des Drehkreuzelements (19) vorgesehen ist und eine Führung oder eine Leitung (122a, 222a, 222b) definiert, welche während der Drehung der Trommel (1) in mindestens einer der Drehrichtungen die im hinteren und unteren Bereich (2a) des Bottichs (2) enthaltene Flüssigkeit in Richtung einer oder mehrerer der einen oder der mehreren Einlassöffnungen (17, 17a, 17b) führt.
  6. Waschmaschine nach Anspruch 5, dadurch gekennzeichnet, dass die Förderelemente (22, 22a, 22b) schaufelförmig sind und eine gekrümmte Fläche (23) umfassen, die so ausgelegt ist, dass sie eine Flüssigkeit in Richtung einer oder mehrerer der Einlassöffnungen (17, 17a, 17b) führt, während das Förderelement (22, 22a, 22b) die Flüssigkeit während der Drehung der Trommel (1) in einer vorbestimmten Drehrichtung hineinbewegt.
  7. Waschmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die eine oder die mehreren Hebeeinrichtungen (8) mit der einen oder den mehreren Einlassöffnungen (17, 17a, 17b) in direkter Flüssigkeitsverbindung stehen.
  8. Waschmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die eine oder die mehreren Hebeeinrichtungen (8) über ein oder mehrere Einlasslöcher (18, 18a, 18b), die in/an den Hebeeinrichtungen (8) vorgesehen und so angeordnet sind, dass sie der einen oder den mehreren Einlassöffnungen (17, 17a, 17b) gegenüberliegen, mit der einen oder den mehreren Einlassöffnungen (17, 17a, 17b) in Flüssigkeitsverbindung stehen.
  9. Waschmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die eine oder die mehreren Hebeeinrichtungen (8) durch Verbindungsmittel, welche die eine oder die mehreren Einlassöffnungen (17, 17a, 17b) mit dem Inneren der Hebeeinrichtungen (8) verbinden, mit der einen oder den mehreren Einlassöffnungen (17, 17a, 17b) in Flüssigkeitsverbindung stehen.
  10. Waschmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die eine oder die mehreren Hebeeinrichtungen (8) eine Fließfläche (13) umfassen, die so ausgelegt ist, dass sie während der Drehung der Trommel (1) eine in der jeweiligen Hebeeinrichtung (8) enthaltene Waschflüssigkeit in Richtung der Auslassöffnungen (9) der Hebeeinrichtung (8) führt, wobei die Fließfläche (13) derart geneigt ist, dass sie die Waschflüssigkeit in Richtung eines vorderen Endes (11a) der jeweiligen Hebeeinrichtung (8) gegenüber der Basis (3) führt, wenn die Hebeeinrichtung (8) während der Drehung der Trommel (1) im oberen Bereich (2b) des Bottichs (2) ist.
  11. Waschmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in mindestens einer der einen oder der mehreren Hebeeinrichtungen (8) zwei Kammern (25a, 25b) vorgesehen sind, die über eine oder mehrere der Auslassöffnungen (9) mit dem Inneren der Trommel (1) in Flüssigkeitsverbindung stehen, wobei jede Kammer (25a, 25b) über mindestens eine der einen oder der mehreren Einlassöffnungen (17a, 17b) mit der Außenseite der Trommel (1) in Flüssigkeitsverbindung steht, um während der Drehung der Trommel (1) zu ermöglichen, dass die in einem hinteren und unteren Bereich (2a) des Bottichs (2) vorhandene Waschflüssigkeit in die eine oder die mehreren Hebeeinrichtungen (8) eintritt.
  12. Waschmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Schöpfmittel so ausgelegt ist, dass es eine Waschflüssigkeit aus dem hinteren und unteren Bereich (2a) des Bottichs (2) sammelt und die Waschflüssigkeit während der Drehung der Trommel (1) in beiden Drehrichtungen über die eine oder die mehreren Einlassöffnungen (17, 17a, 17b) in das Innere der Hebeeinrichtungen (8) führt.
  13. Waschmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Schöpfmittel so ausgelegt ist, dass es eine Waschflüssigkeit aus dem hinteren und unteren Bereich (2a) des Bottichs (2) sammelt und die Waschflüssigkeit während der Drehung der Trommel (1) in nur einer Drehrichtungen über die eine oder die mehreren Einlassöffnungen (17, 17a, 17b) in das Innere der Hebeeinrichtungen (8) führt, während es so ausgelegt ist, dass es die Waschflüssigkeit während der Drehung der Trommel (1) in der anderen Drehrichtung nicht sammelt.
EP20090008485 2009-06-29 2009-06-29 Waschmaschine Active EP2270272B1 (de)

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US20200407906A1 (en) * 2018-02-27 2020-12-31 Qingdao Haier Washing Machine Co., Ltd. Inner drum and no-clean washing machine

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EP2631342A1 (de) * 2012-02-27 2013-08-28 Electrolux Home Products Corporation N.V. Wäschetrommel für eine Wäschebehandlungsmaschine
KR102053143B1 (ko) * 2013-04-30 2019-12-06 엘지전자 주식회사 세탁기
DE102014208656A1 (de) * 2014-05-08 2015-11-12 BSH Hausgeräte GmbH Haushaltsgerät zur Pflege von Wäschestücken mit einem spezifisch ausgebildeten Bereich zwischen einer Trommel und einem Tragstern
JP6282206B2 (ja) * 2014-09-19 2018-02-21 日立アプライアンス株式会社 ドラム式洗濯機
CN107385803B (zh) * 2017-07-19 2020-05-15 无锡小天鹅通用电器有限公司 滚筒洗衣机和用于滚筒洗衣机的洗衣桶组件
CN107245849B (zh) * 2017-07-19 2020-05-19 无锡小天鹅通用电器有限公司 滚筒洗衣机和用于滚筒洗衣机的洗衣桶组件
CN107245850B (zh) * 2017-07-19 2020-03-20 无锡小天鹅通用电器有限公司 滚筒洗衣机和用于滚筒洗衣机的洗衣桶组件
CN107503086B (zh) * 2017-07-19 2020-03-24 无锡小天鹅通用电器有限公司 滚筒洗衣机和用于滚筒洗衣机的洗衣桶组件
CN107503087B (zh) * 2017-07-19 2020-02-18 无锡小天鹅通用电器有限公司 滚筒洗衣机和用于滚筒洗衣机的洗衣桶组件
WO2019127464A1 (zh) * 2017-12-29 2019-07-04 陈坚胜 洗衣机的搅水装置以及洗衣机
KR102650116B1 (ko) 2018-09-11 2024-03-21 삼성전자주식회사 드럼 세탁기
WO2020088849A1 (en) 2018-11-02 2020-05-07 Arcelik Anonim Sirketi A washing machine
EP3690106B1 (de) 2019-02-01 2021-03-31 LG Electronics Inc. Wäschebehandlungsvorrichtung
KR20220024687A (ko) 2019-06-21 2022-03-03 일렉트로룩스 어플라이언스 아크티에볼레그 세탁물 처리 기기
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US11680356B2 (en) * 2018-02-27 2023-06-20 Qingdao Haier Washing Machine Co., Ltd. Inner drum and no-clean washing machine

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