EP3702512B1 - Wäschewaschmaschine - Google Patents

Wäschewaschmaschine Download PDF

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Publication number
EP3702512B1
EP3702512B1 EP19159503.2A EP19159503A EP3702512B1 EP 3702512 B1 EP3702512 B1 EP 3702512B1 EP 19159503 A EP19159503 A EP 19159503A EP 3702512 B1 EP3702512 B1 EP 3702512B1
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EP
European Patent Office
Prior art keywords
annular
washing machine
hemishell
section
laundry washing
Prior art date
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Application number
EP19159503.2A
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English (en)
French (fr)
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EP3702512A1 (de
Inventor
Igor Colin
Marcin Lorenc
Diana Moruzzi
Ashish Gupta
Narayanan K R RUKESH
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 Appliances AB
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Electrolux Appliances AB
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Publication date
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Priority to EP19159503.2A priority Critical patent/EP3702512B1/de
Priority to PL19159503.2T priority patent/PL3702512T3/pl
Publication of EP3702512A1 publication Critical patent/EP3702512A1/de
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Publication of EP3702512B1 publication Critical patent/EP3702512B1/de
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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
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
    • D06F37/225—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets
    • 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
    • D06F37/24—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a vertical axis
    • D06F37/245—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets

Definitions

  • the present invention relates to a laundry washing machine.
  • the present invention relates to a front-loading home laundry washing machine, to which the following description specifically refers purely by way of example without this implying any loss of generality.
  • a front-loading home laundry washing machine generally comprises: a substantially parallelepiped-shaped, self-supporting boxlike outer casing structured for resting on the floor; a substantially horizontally-oriented and nearly cylindrical, cup-shaped washing tub which, in use, contains the washing liquid and is suspended in floating manner inside the casing, with the front mouth directly facing a laundry loading-unloading through opening formed in the front wall of the casing; a substantially cylindrical, cup-shaped rotatable drum which is structured for accommodating the laundry to be washed, and is fitted in axially rotatable manner inside the washing tub with the concavity facing the laundry loading-unloading opening, so as to be able to freely rotate inside the washing tub about its substantially horizontally-oriented, central axis locally coinciding with the longitudinal axis of the washing tub; an elastically-deformable bellows which watertight connects the front mouth of the washing tub to the laundry loading-unloading opening formed in the front wall of the casing; a porthole door which is hinged
  • today's high end laundry washing machines are additionally provided with at least one and usually two ball balancing rings which are rigidly secured to the drum body perfectly coaxial to the drum rotation axis.
  • each ball balancing ring is substantially circular in shape and is usually secured to the drum body, outside of the drum and adjacent to the front or rear rim of the drum cylindrical wall, coaxial to the drum rotation axis.
  • Each ball balancing ring moreover basically comprises: a rigid, hollow toroidal housing having inside a perfectly circular, closed annular inner cavity; and a number of heavy spherical masses accommodated in free movable manner inside the inner cavity of the toroidal housing together with a viscous liquid that damps out the movement of the spherical masses inside the inner cavity.
  • the toroidal housing is secured to the drum body perfectly coaxial to the drum rotation axis, so that the annular inner cavity lies/extends on a plane perfectly perpendicular to the drum rotation axis.
  • the spherical masses tend to group together and to move altogether inside the inner cavity so as to balance the unbalanced load (laundry) momentarily placed inside the drum.
  • EP0810317 A1 discloses a front-loading laundry washing machine wherein one of the two ball balancing rings is stably incorporated into the front wall of the drum.
  • EP1862577 A2 discloses a front-loading laundry washing machine wherein the annular inner cavity of the toroidal housing has a nearly rectangular, uniform cross-section, and wherein the hollow toroidal housing is divided into two discrete and complementary annular members that are made of plastic material and are fused together.
  • the first annular member has a nearly U-shaped cross section with the two opposite and concentric lateral walls extending perpendicular to the midplane of the toroidal housing (i.e. the plane perpendicular to the central axis of the torus and containing the geometric barycentres of all the transversal/poloidal cross-sections of the torus), whereas the second annular member has a nearly plate-like annular structure and is welded in abutment against the inner and outer annular rims/ edges of the first annular member, so as to fluid-tight close the annular opening of the circular groove delimited by the first annular member.
  • the first annular member therefore extends astride of the mid plane of the toroidal housing, whereas the second annular member lies/extends on a lying plane parallel and spaced apart from the midplane of the toroidal housing.
  • each spherical mass is allowed to freely move, on surface of the cylindrical outer wall of the first annular member, even in a direction parallel to the drum rotation axis. Therefore it may happens that, during a spin phase, the spherical masses group together while misaligning along the circumferential direction, with all problems that this entails.
  • the spherical masses in fact, start moving on different orbital planes that are parallel and slightly spaced to one another, thus causing small mechanical vibrations that increases together with rotation speed and became extremely noisy when rotation speed rises above 1200 rpm.
  • Aim of the present invention is to realize a ball balancing ring capable of operating at high drum rotation speeds without the drawbacks referred above.
  • a laundry washing machine having an outer casing and comprising, inside said outer casing: a washing tub adapted to contain the washing liquid; a rotatable drum which is fitted in axially rotatable manner inside the washing tub and is adapted to contain the laundry to be washed; and at least one balancing ring which is rigidly secured to the rotatable drum for reducing the vibrations of the drum;
  • the laundry washing machine is furthermore characterized in that the axis around which the drum rotates is horizontal, or slightly inclined, with respect to the plane where the machine rests in its working position.
  • the laundry washing machine is furthermore characterized in that the transversal cross-section of said annular inner cavity additionally has a third and a fourth consecutive sides which are located substantially astride of the midplane, opposite to said first and second consecutive sides, are inclined to one another and are both non-perpendicular to said midplane.
  • the laundry washing machine is furthermore characterized in that the first and the second consecutive sides of the transversal cross-section of the annular inner cavity are inclined with respect to the midplane by an angle lower than 90°, and preferably ranging between 30° and 75°.
  • the laundry washing machine is furthermore characterized in that the transversal cross-section of the annular inner cavity is substantially rhomboidal in shape.
  • the laundry washing machine is furthermore characterized in that the transversal cross-section of the annular inner cavity has at least five sides.
  • the laundry washing machine is furthermore characterized in that the transversal cross-section of the annular inner cavity has roughly the shape of an irregular hexagon.
  • the laundry washing machine is furthermore characterized in that the annular housing has a tubular structure with a substantially polygonal-shaped, transversal cross-section.
  • the laundry washing machine is furthermore characterized in that the transversal cross-section of the inner annular hemishell includes the third and fourth consecutive sides of the polygon defining/resembling the transversal cross-section of said annular housing.
  • the laundry washing machine is furthermore characterized in that the transversal cross-section of said outer annular hemishell has a substantially C-shaped, curved polygonal-chain profile.
  • the laundry washing machine is furthermore characterized in that the transversal cross-section of said inner annular hemishell has a substantially C-shaped, curved polygonal-chain profile.
  • the laundry washing machine is furthermore characterized in that the curved polygonal chain has three or more straight line segments connected and inclined to one another.
  • the laundry washing machine is furthermore characterized in that said inner annular hemishell and said outer annular hemishell are stably joined/coupled to one another along corresponding first and second mating annular rims/edges.
  • the laundry washing machine is furthermore characterized in that said first and second mating annular rims/edges are arranged on opposite sides of midplane of said annular housing.
  • the laundry washing machine is furthermore characterized in that said inner and said outer annular hemishells are made of plastic material and are reciprocally welded along said first and second mating annular rims/edges.
  • the laundry washing machine is furthermore characterized in that the outer annular hemishell has a first wall segment and a second wall segment nearly faced and non-parallel to one another, and a third wall segment connecting the first wall segment to the second wall segment; the first annular rim/edge of the outer annular hemishell edging the first wall segment of said outer annular hemishell; the second annular rim/edge of the outer annular hemishell edging the second wall segment of said outer annular hemishell.
  • the laundry washing machine is furthermore characterized in that the inner annular hemishell has a first wall segment and a second wall segment nearly faced and non-parallel to one another, and a third wall segment connecting the first wall segment to the second wall segment; the first annular rim/edge of the inner annular hemishell edging the first wall segment of said first annular hemishell; the second annular rim/edge of the inner annular hemishell edging the second wall segment of said inner annular hemishell.
  • the laundry washing machine is furthermore characterized in that the outer annular hemishell is adapted to firmly abut on the drum.
  • the laundry washing machine is furthermore characterized in that the outer annular hemishell is provided with a number of fixing protrusions which are angularly spaced about the central axis and extend outwards in a nearly radial direction so as to stably abut against the drum.
  • the laundry washing machine is furthermore characterized in that the balancing ring includes, inside the annular inner cavity a dumping liquid that damps out the movement of the balancing masses inside the same annular inner cavity.
  • the laundry washing machine is furthermore characterized in that the balancing ring is rigidly secured directly to the cylindrical wall of the drum.
  • the laundry washing machine is furthermore characterized in that the balancing ring is located inside the drum.
  • the laundry washing machine is furthermore characterized in that the balancing masses are spherical in shape.
  • reference number 1 denotes as a whole a laundry washing machine 1 preferably suitable for domestic use.
  • the laundry washing machine 1 basically comprises: a preferably substantially parallelepiped-shaped, self-supporting boxlike outer casing 2 structured for stably resting on the floor; a preferably substantially cylindrical, washing tub 3 which, in use, contains the washing liquid and is arranged inside the casing 2 with its mouth directly facing a laundry loading-unloading opening formed on the casing 2; a substantially cylindrical, hollow rotatable drum 4 which is structured for accommodating the laundry to be washed, and is fitted in axially rotatable manner inside the washing tub 3 so as to be able to freely rotate about its longitudinal/central axis A inside the washing tub 3; a door 5 which is hinged to the outer casing 2 so as to be manually movable to and from a closing position (see Figure 1 ) in which the door 5 closes the laundry loading-unloading opening on the boxlike casing 2 for watertight sealing the washing tub 3; and an electrically-powered motor assembly 6 which is structured for driving into rotation the rotatable drum 4 about its longitudinal axis A inside
  • the laundry washing machine 1 comprises, inside the outer casing 2, a detergent dispenser 7 and a fresh-water supply circuit 8.
  • the detergent dispenser 7 is preferably located inside the outer casing 2 above the washing tub 3 and preferably, though not necessarily, immediately underneath an upper worktop or top wall of casing 2, and is structured for selectively feeding into the washing tub 3, preferably according to a washing cycle manually-selected by the user, a given amount of detergent, softener and/or other washing agent suitably mixed with water.
  • the fresh-water supply circuit 8 in turn, is directly connected/connectable to the water mains, and is structured for selectively channelling, preferably according to the washing cycle manually-selected by the user, a flow of water from the water mains to the detergent dispenser 7 and/or directly to the washing tub 3.
  • the washing tub 3 is preferably substantially cup-shaped, is preferably arranged substantially horizontally inside the outer casing 2, and is preferably provided with a nearly circular front mouth that directly faces a complementary-shaped, laundry loading-unloading opening formed on a front wall 9 of casing 2.
  • the door 5 is preferably hinged to the front wall 9 so as to be manually movable, preferably about a nearly vertically-oriented rotation axis, to and from a closing position in which the door 5 closes the laundry loading-unloading opening on front wall 9 for watertight sealing the washing tub 3.
  • washing tub 3 is preferably suspended in floating manner inside the boxlike casing 2 via a suspension system that preferably comprises at least one, and preferably a couple of coil springs 10 connecting the upper portion of washing tub 3 to the top of casing 2, and preferably at least one and more conveniently a couple of vibration dampers 11 connecting the bottom portion of washing tub 3 to the bottom of casing 2.
  • a suspension system that preferably comprises at least one, and preferably a couple of coil springs 10 connecting the upper portion of washing tub 3 to the top of casing 2, and preferably at least one and more conveniently a couple of vibration dampers 11 connecting the bottom portion of washing tub 3 to the bottom of casing 2.
  • the laundry washing machine 1 moreover comprises an elastically-deformable tubular bellows 12 that watertight connects the front mouth of washing tub 3 to the laundry loading-unloading opening formed on the front wall 9 of boxlike casing 2.
  • the rotatable drum 4 is preferably substantially cup-shaped and is fitted in axially rotatable manner inside the washing tub 3 with its concavity facing the front mouth of washing tub 3.
  • the rotatable drum 4 is furthermore arranged inside washing tub 3 with the drum rotation axis A locally substantially coaxial to the longitudinal axis of washing tub 3, and with its nearly circular front mouth directly aligned and faced to the front mouth of washing tub 3, so as to receive the laundry to be washed through the laundry loading-unloading opening present on front wall 9.
  • the drum rotation axis A is preferably substantially horizontal.
  • laundry washing machine 1 additionally comprises at least one balancing ring 13 which is discrete from rotatable drum 4, is rigidly secured to the rotatable drum 4 substantially coaxial to the drum rotation axis A, and is adapted to minimize/reduce the vibrations produced by drum 4 when rotating at high speed about the rotation axis A while accommodating an unbalance load of laundry.
  • the/each balancing ring 13 is substantially circular in shaped, and is preferably accommodated inside of drum 4 coaxial to drum rotation axis A.
  • the/each balancing ring 13 is furthermore rigidly secured directly to the cylindrical wall 14 of drum 4.
  • laundry washing machine 1 is preferably provided with two balancing rings 13 which are rigidly secured to the body of rotatable drum 4, preferably inside the drum 4 and preferably adjacent to the front and rear rims of the cylindrical wall 14 of drum 4.
  • the/each balancing ring 13 basically comprises: a substantially toroidal, rigid annular housing 15 which is adapted to be rigidly secured to the body of drum 4, or rather to the cylindrical wall 14 of drum 4, so that its central axis B substantially coincides with the drum rotation axis A, and has a tubular structure so as to delimit, inside itself, a closed annular cavity 16 which is circular in shape, is coaxial to central axis B and preferably has a substantially uniform cross-section; a number of heavy balancing masses 17 that are accommodated in free movable manner inside the inner cavity 16 of annular housing 15; and a dumbing liquid (not shown in the figures) that fills up, preferably completely, the inner cavity 16 of toroidal annular housing 15 for damping out the movement of the balancing masses 17 inside the annular inner cavity 16.
  • the balancing masses 17 are preferably spherical in shape so as to roll on the inner surface of the hollow annular housing 15, and are preferably made of metal material. Preferably, the balancing masses 17 are moreover dimensioned so as to take up more than 50% of the transversal cross-section of the annular inner cavity 16.
  • the dumbing liquid is preferably a silicon-based liquid and/or preferably has a viscosity higher than 200 cSt.
  • a transversal cross-section of the torus is a section of the torus according to a cutting plane which extends radially from the central axis of the torus and is, at same time, perpendicular to any plane perpendicular to the central axis of the torus, whereas the midplane or equatorial plane of the torus is the plane perpendicular to the central axis of the torus and containing the geometric barycentres of all the transversal cross-sections of the torus.
  • the hollow annular housing 15 is shaped/structured so that the transversal cross-section of its annular inner cavity 16 is substantially polygonal in shape.
  • the preferably irregular, simple polygon defining/resembling the shape of the transversal cross-section of inner cavity 16 has at least a first and a second consecutive sides which are located substantially astride of the midplane P of the annular housing 15 (i.e. the plane perpendicular to central axis B and containing the geometric barycentres of almost all the transversal cross-sections of annular housing 15), opposite to the central axis B, are inclined to one another and are both non-perpendicular to the midplane P.
  • Said first and second consecutive sides of the polygon therefore form, on the outer toroidal sector of the annular inner cavity 16, an annular race which has a nearly V-shaped cross-section and lies on a plane perfectly parallel to the midplane P.
  • transversal cross-section of annular housing 15 is preferably substantially polygonal in shape and complementary to that of inner cavity 16.
  • the preferably irregular, simple polygon defining/resembling the shape of the transversal cross-section of annular housing 15 has at least a first and a second consecutive sides which are located substantially astride of the midplane P of the annular housing 15, opposite to the central axis B, are inclined to one another and are both non-perpendicular to the midplane P. Said first and second consecutive sides of the polygon therefore form, on the outer toroidal sector of the outer wall of annular housing 15, an annular race which has a nearly V-shaped cross-section and lies on a plane perfectly parallel to the midplane P.
  • both said first and second consecutive sides of the polygon defining/resembling the transversal cross-section of annular inner cavity 16, or rather of annular housing 15, are inclined with respect to the midplane P by an angle lower than 90°, and preferably also ranging between 30° and 75°.
  • the polygon defining/resembling the transversal cross-section of inner cavity 16, or rather of annular housing 15, additionally has at least a third and a fourth consecutive sides that are located substantially astride of the midplane P, opposite to said first and second consecutive sides and thus directly faced to central axis B, are inclined to one another and are both non-perpendicular to the midplane P.
  • both said third and fourth consecutive sides of the polygon defining/resembling the transversal cross-section of inner cavity 16, or rather of annular housing 15, are inclined with respect to the midplane P by an angle lower than 90°, and preferably also ranging between 30° and 75°.
  • the polygon defining/resembling the transversal cross-section of inner cavity 16, or rather of annular housing 15, preferably has at least four sides which are consecutive in pairs and are inclined with respect to the midplane P by respective angles lower than 90°, and preferably also ranging between 30° and 75°.
  • transversal cross-section of inner cavity 16, or rather of annular housing 15 is preferably substantially rhomboidal in shape.
  • the polygon defining/resembling the transversal cross-section of inner cavity 16, or rather of annular housing 15, preferably has at least five sides.
  • each of the sides of polygon defining/resembling the shape of the transversal cross-section of inner cavity 16, or rather of annular housing 15, is furthermore non-perpendicular to the midplane P of the annular housing 15.
  • transversal cross-section of inner cavity 16, or rather of annular housing 15 preferably has approximately the shape of an irregular hexagon.
  • the toroidal annular housing 15 is preferably divided into, or at least includes, two discrete and complementary annular hemishells 18 and 19 that are preferably substantially coplanar and concentric to one another, and are watertight joined/coupled to one another so as to form/delimit the annular inner cavity 16.
  • both annular hemishells 18 and 19 preferably extend astride of the midplane P of annular housing 15 and the annular hemishell 19 surrounds the annular hemishell 18.
  • the transversal cross-section of outer annular hemishell 19, therefore, includes the first and second consecutive sides of the polygon defining/resembling the transversal cross-section of annular housing 15.
  • the transversal cross-section of both annular hemishells 18 and 19 preferably has a substantially C-shaped, curved polygonal-chain profile.
  • both annular hemishells 18 and 19 basically consists of a series of straight line segments connected and inclined to one another so as to resemble a C.
  • the straight line segments of said substantially C-shaped, curved polygonal-chain profile moreover have lengths different to one another.
  • the curved polygonal-chain profile of the transversal cross-section of outer annular hemishell 19 preferably includes three straight line segments connected and inclined to one another.
  • the straight line segments of the curved polygonal-chain may include more than three straight line segments connected and inclined to one another.
  • the curved polygonal-chain profile of the transversal cross-section of annular hemishell 18 preferably includes three straight line segments connected and inclined to one another.
  • the straight line segments of the curved polygonal-chain may include more than three straight line segments connected and inclined to one another.
  • annular hemishells 18 and 19 are stably joined/coupled to one another along corresponding mating annular rims/edges 18a, 19a and 18b, 19b that are preferably located on opposite sides of the midplane P of annular housing 15.
  • the inner annular hemishell 18 preferably has an approximately C-shaped cross section with the concavity facing the annular hemishell 19, i.e. opposite to central axis B, and the two annular rims/edges 18a and 18b delimiting the annular groove/channel of hemishell 18 are located on opposite sides of the midplane P.
  • the outer annular hemishell 19 in turn, preferably has an approximately C-shaped cross section with the concavity facing the central axis B and the annular hemishell 18, and the two annular rims/edges 19a and 19b delimiting the annular groove/channel of hemishell 19 are located on opposite sides of the midplane P.
  • the outer annular hemishell 19, furthermore, encircles the inner annular hemishell 18 so that its two annular rims/edges 19a and 19b area aligned and stably coupled/joined each to a respective facing annular rim/edge 18a, 18b of annular hemishell 18.
  • annular hemishells 18 and 19 are preferably made of plastic material and are stably fused/joined to one another preferably via vibration welding.
  • annular rims/edges 18a and 18b of annular hemishell 18 are preferably stably joined/fused to the corresponding mating annular rims/edges 19a and 19b of annular hemishell 19 by vibration welding.
  • annular rims/edges 18a and 18b of annular hemishell 18 may be stably joined to the mating annular rims/ edges 19a and 19b of annular hemishell 19 by gluing.
  • the inner annular hemishell 18 is preferably provided with a first wall segment 21 and a second wall segment 22 nearly faced and non-parallel to one another, and a third wall segment 23 connecting the first wall segment 21 to the second wall segment 22.
  • the first annular rim/edge 18a of annular hemishell 18 edges the first wall segment 21 of annular hemishell 18, whereas the second annular rim/edge 18b of annular hemishell 18 edges the second wall segment 22 of annular hemishell 18.
  • consecutive wall segments 21 and 23 of annular hemishell 18 are preferably arranged substantially astride of the midplane P of annular housing 15, are inclined to one another and are both non-perpendicular to the midplane P.
  • the wall segments 21 and 23 of annular hemishell 18 therefore correspond to the third and fourth consecutive sides of the preferably irregular, simple polygon defining/ resembling the transversal cross-section of annular housing 15.
  • the outer annular hemishell 19 is preferably provided with a first wall segment 24 and a second wall segment 25 nearly faced and non-parallel to one another, and a third wall segment 26 connecting the first wall segment 24 to the second wall segment 25.
  • the first annular rim/edge 19a of annular hemishell 19 edges the first wall segment 24 of annular hemishell 19, whereas the second annular rim/edge 19b of annular hemishell 19 edges the second wall segment 25 of annular hemishell 19.
  • the first wall segment 24 of outer annular hemishell 19 is moreover faced to the second wall segment 22 of inner annular hemishell 18.
  • the second wall segment 25 of outer annular hemishell 19 is preferably faced to the first wall segment 21 of inner annular hemishell 18.
  • the first wall segment 24 of outer annular hemishell 19 is furthermore faced to the second wall segment 22 of inner annular hemishell 18
  • consecutive wall segments 25 and 26 of annular hemishell 19 are preferably arranged substantially astride of the midplane P of annular housing 15, are inclined to one another and are both non-perpendicular to the midplane P.
  • the wall segments 25 and 26 of annular hemishell 19 therefore correspond to the first and second consecutive sides of the preferably irregular, simple polygon defining/ resembling the transversal cross-section of annular housing 15.
  • the annular hemishells 18 and 19 are preferably shaped so that the two annular rims/edges 18a and 18b of annular hemishell 18 and the two annular rims/edges 19a and 19b of annular hemishell 19 are located/extend/lie on a same/common frustoconical surface which is coaxial to the central axis B of annular housing 15 and has an opening angle lower than 150°.
  • the opening angle of said frustoconical surface preferably ranges between 20° and 70°.
  • the generatrix f of the frustoconical surface makes an angle ⁇ with respect to central axis B preferably ranging between 10° and 35°.
  • annular rims/edges 18a, 18b, 19a and 19b of the annular hemishells 18 and 19 are located/extend/lie on a frustoconical surface whose generatrix f is preferably inclined with respect to central axis B by an angle ⁇ roughly equal to 15°.
  • the opening angle of the frustoconical surface on which the annular rims/edges 18a, 18b, 19a and 19b of annular hemishells 18 and 19 lie is preferably equal to roughly 30°.
  • outer annular hemishell 19 of annular housing 15 is preferably structured to firmly rest/prop on the body of drum 4, or rather against the cylindrical wall 14 of drum 4, coaxial to drum rotation axis A.
  • the outer annular hemishell 19 is preferably provided with a number of fixing protrusions 28 which are angularly spaced about the central axis B and extend outwards in a nearly radial direction so as to stably abut against the body of drum 4, or rather against the cylindrical wall 14 of drum 4.
  • these fixing protrusions 28 are additionally coplanar to one another and substantially regularly spaced about the central axis B.
  • the fixing protrusions 28 are preferably regularly spaced about the central axis B and extend on a same/common reference laying plane which is substantially parallel to and offset from the midplane P of annular housing 15.
  • each fixing protrusion 28 is moreover adapted to be engaged by a preferably radially-extending, fixing screw 29 that extend in pass-through manner through the body of drum 4, or rather through the cylindrical wall 14 of drum 4.
  • each fixing protrusion 28 is preferably provided with a radiallyoriented, bling central hole adapted to be engaged by the threaded stem of the fixing screw.
  • the balancing masses 17 tend to group together and to move inside the annular inner cavity 16 of annular housing 15 so as to balance the unbalanced load, i.e. the laundry momentarily placed inside the drum 4.
  • the particular shape of the transversal cross-section of annular inner cavity 16 allows to keep the balancing masses 17 perfectly coplanar to one another while they are moving at high speed inside the toroidal hollow annular housing 15, thus avoiding all problems resulting from the misalignment long the circumferential direction.
  • annular housing 15 significantly increases the overall stiffness of the annular housing 15, thus minimizing the natural in-use deformations of annular housing 15, even when drum rotation speed rises far beyond 1000 rpm.
  • the laundry washing machine 1 is less noisy that today's laundry washing machines with traditional ball balancing rings.
  • each balancing mass 17 has now two spaced points of contact with the surface of annular hemishell 19, thus further reducing the noise of the balancing masses 17 rolling inside the inner annular cavity 16.
  • the balancing ring 13 may lack the dumbing liquid.
  • the ball balancing ring or rings 13 may be firmly secured to the body of drum 4, outside of drum 4.
  • front balancing ring 13 may be located/recessed into a specific annular seat formed in the front wall 30 of drum 4, obviously coaxial to drum longitudinal/rotation axis A.
  • fixing protrusions 28 may be replaced by a single outwardsprotruding annular rib or ridge extending all around the annular hemishell 19.

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

Claims (13)

  1. Wäschewaschmaschine (1), die eine Außenhülle (2) aufweist und, in der Außenhülle (2), Folgendes umfasst: einen Waschbottich (3), die dazu ausgelegt ist, die Waschflüssigkeit zu enthalten; eine drehbare Trommel (4), die in einer axial drehbaren Weise in dem Waschbottich (3) eingebaut ist und dazu ausgelegt ist, die zu waschende Wäsche zu enthalten; und mindestens einen Auswuchtring (13), der starr an der drehbaren Trommel (4) zum Reduzieren der Vibrationen der Trommel (4) befestigt ist;
    wobei der mindestens eine Auswuchtring (13) Folgendes umfasst: ein toroides ringförmiges Gehäuse (15), das starr an der Trommel (4) befestigt ist und eine rohrförmige Struktur aufweist, um einen geschlossenen ringförmigen inneren Hohlraum (16) mit einem polygonförmigen Querschnitt zu begrenzen; und eine Anzahl von Auswuchtmassen (17), die in einer frei beweglichen Weise in dem ringförmigen inneren Hohlraum (16) untergebracht sind;
    wobei die Wäschewaschmaschine (1) dadurch gekennzeichnet ist, dass das toroide ringförmige Gehäuse (15) eine innere ringförmige Halbschale (18) und eine äußere ringförmige Halbschale (19) umfasst, die diskret und komplementär zueinander sind, sich zu beiden Seiten einer Mittelebene (P) des ringförmigen Gehäuses (15) senkrecht zu der Mittelachse (B) erstrecken, konzentrisch zueinander sind und schließlich derart aneinander gefügt sind, dass sie den ringförmigen inneren Hohlraum (16) des ringförmigen Gehäuses (15) bilden/begrenzen; und dadurch, dass der transversale Querschnitt der äußeren ringförmigen Halbschale (19), gegenüber der Mittelachse (B) des ringförmigen Gehäuses (15), eine erste (25) und eine zweite (26) aufeinanderfolgende Seite aufweist, die sich zu beiden Seiten der Mittelebene (P) befinden, zueinander geneigt sind und beide nicht senkrecht zu derselben Mittelebene (P) sind.
  2. Wäschewaschmaschine nach Anspruch 1, wobei der transversale Querschnitt des ringförmigen inneren Hohlraums (16) zusätzlich eine dritte (21) und eine vierte (23) aufeinanderfolgende Seite aufweist, die sich zu beiden Seiten der Mittelebene (P), gegenüber zu den ersten (25) und zweiten (26) aufeinanderfolgenden Seiten, befinden, zueinander geneigt sind und beide nicht senkrecht zu der Mittelebene (P) sind.
  3. Wäschewaschmaschine nach Anspruch 1, wobei die ersten (25) und die zweiten (26) aufeinanderfolgenden Seiten des transversalen Querschnitts des ringförmigen inneren Hohlraums (16) in Bezug auf die Mittelebene (P) um einen Winkel geneigt sind, der kleiner als 90° ist und vorzugsweise im Bereich zwischen 30° und 75° liegt.
  4. Wäschewaschmaschine nach Anspruch 2 oder 3, wobei der transversale Querschnitt des ringförmigen inneren Hohlraums (16) eine im Wesentlichen rhomboide Form aufweist.
  5. Waschmaschine nach Anspruch 2, 3 oder 4, wobei der transversale Querschnitt des ringförmigen inneren Hohlraums (16) mindestens fünf Seiten aufweist.
  6. Wäschewaschmaschine nach Anspruch 5, wobei der transversale Querschnitt des ringförmigen inneren Hohlraums (16) die Form eines unregelmäßigen Hexagons aufweist.
  7. Wäschewaschmaschine nach einem der vorhergehenden Ansprüche, wobei das ringförmige Gehäuse (15) eine rohrförmige Struktur mit einem polygonförmigen, transversalen Querschnitt aufweist.
  8. Wäschewaschmaschine nach einem der Ansprüche 2 bis 7, wobei der transversale Querschnitt der inneren ringförmigen Halbschale (18) die dritten (21) und vierten (23) aufeinanderfolgenden Seiten des Polygons umfasst, das den transversalen Querschnitt des ringförmigen Gehäuses (15) definiert/diesem gleicht.
  9. Wäschewaschmaschine nach einem der vorhergehenden Ansprüche, wobei der transversale Querschnitt der äußeren ringförmigen Halbschale (19) ein C-förmiges, gekrümmtes polygonales Kettenprofil aufweist.
  10. Wäschewaschmaschine nach einem der vorhergehenden Ansprüche, wobei der transversale Querschnitt der inneren ringförmigen Halbschale (18) ein C-förmiges, gekrümmtes polygonales Kettenprofil aufweist.
  11. Waschmaschine nach Anspruch 9 oder 10, wobei die gekrümmte polygonale Kette drei oder mehr gerade Liniensegmente aufweist, die verbunden und zueinander geneigt sind.
  12. Wäschewaschmaschine nach einem der vorhergehenden Ansprüche, wobei die innere ringförmige Halbschale (18) und die äußere ringförmige Halbschale (19) entlang entsprechender erster (18a, 19a) und zweiter (18b, 19b) zusammenpassender ringförmiger Ränder/Kanten fest aneinander gefügt/gekoppelt sind.
  13. Wäschewaschmaschine nach Anspruch 12, wobei die ersten (18a, 19a) und zweiten (18b, 19b) zusammenpassenden ringförmigen Ränder/Kanten auf gegenüberliegenden Seiten der Mittelebene (P) des ringförmigen Gehäuses (15) angeordnet sind.
EP19159503.2A 2019-02-26 2019-02-26 Wäschewaschmaschine Active EP3702512B1 (de)

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EP2436825B1 (de) 2006-06-01 2021-01-13 Samsung Electronics Co., Ltd. Waschmaschine mit Ausgleichsregler
KR101362379B1 (ko) * 2006-06-01 2014-02-13 삼성전자주식회사 밸런서를 구비한 세탁기
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