EP3795734A1 - Waschmaschine - Google Patents

Waschmaschine Download PDF

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Publication number
EP3795734A1
EP3795734A1 EP20190850.6A EP20190850A EP3795734A1 EP 3795734 A1 EP3795734 A1 EP 3795734A1 EP 20190850 A EP20190850 A EP 20190850A EP 3795734 A1 EP3795734 A1 EP 3795734A1
Authority
EP
European Patent Office
Prior art keywords
washing machine
opening
wall
intake passage
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.)
Granted
Application number
EP20190850.6A
Other languages
English (en)
French (fr)
Other versions
EP3795734B1 (de
Inventor
Alessandro Malacrida
Eros DE NOIA
Mauro BOSSI
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.)
Candy SpA
Original Assignee
Candy SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Candy SpA filed Critical Candy SpA
Publication of EP3795734A1 publication Critical patent/EP3795734A1/de
Application granted granted Critical
Publication of EP3795734B1 publication Critical patent/EP3795734B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/088—Liquid supply arrangements
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02—Devices for adding soap or other washing agents
    • 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
    • D06F37/26—Casings; Tubs
    • D06F37/266—Gaskets mounted between tub and casing around the loading opening
    • 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
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage

Definitions

  • the present invention relates to a device and a method for washing laundry, in particular a domestic washing machine.
  • washing machines and combo washer dryers of the background art and the washing and drying methods implemented thereby although satisfactory in many respects, involve a high consumption of water, electricity and detergent and do not always achieve the desired washing results, in particular, in the presence of stains which would require a treatment with a more concentrated detergent solution with respect to that usually present in domestic washing machines.
  • washing machines In order to reduce the consumption of water and detergent, it is known to equip washing machines with recirculation systems which remove the washing liquid from the bottom of the tub (where it accumulates even before wetting the laundry inside the drum) and reintroduce it into the laundry drum so that a reduced volume of liquid is repeatedly poured onto the laundry to be washed.
  • Such recirculation systems usually use an electric recirculation pump which, however, consumes electricity and does not recirculate a concentrated washing solution, but instead a washing solution diluted into a considerable amount of water.
  • the mains water and the detergent, introduced into the washing tub, instead of acting immediately and intensely with the laundry, are introduced into the tub by gravity, allowing them to initially accumulate on the bottom of the washing tub, and require energy to be pumped (in the case of a washing system with recirculation) or dragged/lifted upwards again (by rotating the laundry drum) and dropped on the bottom of the laundry drum or thereinside, where they finally come into contact with the laundry.
  • the detergent is not yet completely transferred from the detergent drawer into the washing tub and the detergent portion brought into the tub is not uniformly mixed with the water but tends to deposit on the bottom of the tub. Consequently, during the early washing steps the concentration of detergent in the laundry is undesirably low.
  • Washing machines are also known in which a solution of water and detergent is introduced directly into the front opening of the drum, by means of a duct which extends from the outside of the washing tub to an opening formed in an annular seal arranged between the front opening of the washing tub and the front opening of the housing of the washing machine.
  • the convex surface of the glass of the porthole door conventionally extends in the trajectory of the flow of water and detergent so that, undesirably, the flow of water and detergent is withheld and guided along the inner surface of the glass of the porthole door downwards and, through the gap between the annular seal and the drum, at least part of the flow flows into the washing tub, instead of directly impacting the laundry inside the drum.
  • a further issue of the known solutions for introducing water and detergent through the annular seal between the washing tub and the housing of the washing machine is due to the very narrow space in the seal area.
  • the flow of water and detergent may not flow inside the drum, and the consequent blockage causes a rise in the level of the liquid in the duct with a consequent overflow of the liquid at the detergent drawer towards the outside of the washing machine.
  • a further disadvantage of known solutions for introducing water and detergent through the annular seal between the washing tub and the housing of the washing machine is the risk of the impermeability in the hydraulic connections between the duct and the elastomeric seal and the structure (of the seal and of the duct/nozzle) undesirably complex and difficult to achieve by injection molding.
  • Specific objects of the embodiments of the invention are the increase of the washing efficiency, a better control of the direction of the flow of water and detergent directly towards the laundry inside the drum, a reduction of the risk of unwanted leaks in case of obstruction of the passage of the flow to the seal, a structure which is simple and easy to construct by injection molding and to mount, as well as a reliable and resistant hydraulic connection.
  • the washing machine comprises an intake nozzle inserted into the intake passage and forming:
  • the highly concentrated detergent mixture instead of ending up on the bottom of the washing tub, is dispensed or sprayed directly on the laundry inside the laundry drum. Due to the rotation of the drum, the laundry is arranged from the beginning along a "satellite" ring along the circumferential wall of the drum, exposing a large surface to the jet of the detergent mixture.
  • the fall duct forms an auxiliary opening, in a higher position with respect to the position of a lower end portion, said auxiliary opening forming an overflow wall for a safety overflow which allows a safe and controlled emptying of the fall duct 16 in the event of obstruction of the intake passage or of the intake nozzle.
  • the auxiliary opening may be connectable or connected to a corresponding receiving opening formed in a wall of the washing tub.
  • a washing machine 1 comprises:
  • the washing machine 1 comprises an intake nozzle 18 inserted into the intake passage 17 and forming:
  • the flattened portion 21 is folded, or inclined with respect to the tubular portion 19, away from the inner surface 10 of the door 9 in the closed position.
  • the intake passage 17 is formed by the annular seal 8 and forms:
  • the tubular seat 24 accommodates the tubular portion 19 and the flattened seat 26 accommodates the flattened portion 21.
  • a lower end portion 28 of the fall duct 16, the tubular seat 24 of the intake passage 17 and the tubular portion 19 of the intake nozzle 18 are inserted into each other and tightened together.
  • the tubular portion 19 is substantially cylindrical, for example, with a circular or oval section, and extending along a longitudinal direction 29.
  • the flattened portion 21 has a length 30 in said longitudinal direction 29, a width 31 in a first transverse direction 32 perpendicular to the longitudinal direction 29, and a height 33 in a second transverse direction 34 perpendicular to the longitudinal direction 29 and to the first transverse direction 32.
  • the height 33 of the flattened portion is tapered from the transition region 22 to the free outlet end 23 and the flattened portion 21 is folded or inclined in a divergent manner from the longitudinal direction 29.
  • the flattened portion 21 forms an outer wall/surface 35 facing the front opening 3 and an opposite inner wall/surface 36 facing the interior of the laundry drum 11, in which the outer wall/surface 35 has an externally convex shape, for example, curved in a continuous or uniform manner, while the opposite inner wall/surface 36 has an externally concave shape, for example, consisting of two substantially planar portions 36', 36" mutually oriented at an obtuse angle ( Figures 7, 8, 9 ).
  • This geometric configuration reconciles the need for a reduced resistance to the flow inside the intake nozzle 18, in particular on the outer side of the curve where the speed of the flow is greater, with the need for a positioning of the intake nozzle 18 by means of a shape coupling, facilitated by a geometry with non-gradual edges and corners.
  • the tubular portion 19 terminates at the start of the flattened portion 21, while, on the opposite side of the inner wall/surface 36, the tubular portion 19 extends beyond the start of the flattened portion 21, overlapping the latter by more than 30%, preferably more than 50%, of the length 30 thereof ( Figure 7 ).
  • the intake nozzle 18 forms an outer widening step 37 from the tubular portion 19 to the flattened portion 21.
  • the intake passage 17 forms an inner step 38 having a substantially complementary shape to the shape of the outer step 37.
  • the outer step 37 is larger in the first transverse direction 32 and smaller or absent in the second transverse direction 34.
  • the flattened portion 21 widens starting from the transition region 22 to the free outlet end 23, for example, the flattened portion has a substantially trapezoidal shape ( Figure 8 ). This allows to give the free outlet end 23 an elongated and narrow slit shape such as to produce a flow or jet of liquid in the shape of a tent or blade which improves the effectiveness of the soaping of the laundry contained in the laundry drum 11.
  • the intake passage 17 has an inner shape substantially complementary to the outer shape of the intake nozzle 18. This further improves the watertight sealing of the seal 8 and the positioning of the intake nozzle 18.
  • the annular seal 8 forms, in addition to one or more sealing lips 58 intended to be engaged by the inner surface 10 of the door 9, a first rib or bellow fold 39 protruding radially inwards and extending circumferentially, as well as a second lip 40 protruding radially inwards and extending circumferentially and covering a gap between the washing tub 5 and the laundry drum 11, in which the intake passage 17 is formed directly in the second lip 40, and the second lip 40 is separated from the first rib or fold 39 by a groove (not a through groove!) or circumferential counter fold 59.
  • the first rib or fold 39 has a recess 41, for example, in the shape of an arch.
  • Such recess 41 obviates a violation of space between the first rib or fold 39 and the outer contour of the intake passage 17 during the injection molding of the seal 8.
  • the lower end portion 28 of the fall duct 16 is inserted or fitted (externally) over the tubular seat 24 of the intake passage 17 which, in turn, internally accommodates the tubular portion 19 of the intake nozzle 18, and a tightening clip 43 (or band) is externally applied about the lower end portion 28 of the fall duct 16.
  • the fall duct 16 has a substantially tubular and cylindrical upper portion 42, for example, with an oval or circular section, for a connection of the fall duct to the detergent container 13, the aforesaid lower end portion 28, also preferably cylindrical and tubular, as well as an intermediate bellow-shaped portion 44, or with a corrugated or wavy wall, to facilitate the correct orientation of the lower end portion 28 independently of the position and configuration of the detergent container 13.
  • a deviation (offset) portion 45 may be formed, which realizes a transverse deviation of the flow trajectory in a direction tangent with respect to the annular seal 8 or, in other words, a double deviation of the flow trajectory, for example, by means of a transverse tubular section connecting to each other two pipe sections oriented in predominantly radial directions (with respect to the annular seal 8) and spaced apart with respect to each other in a circumferential direction with respect to the annular seal 8 or with respect to an axis of rotation of the laundry drum 11 ( Figures 2 , 4 , 6 ).
  • This particular geometry brings the fall duct 16 closer to the washing tub 5 and favors a further saving of space. Furthermore, the geometry with a transverse deviation of the flow trajectory forms an internal accumulation sink 49 whose function will be described below.
  • the deviation portion 45 is formed between the bellow portion 44 and the lower end portion 28.
  • the fall duct 16 forms an auxiliary opening 46, in a higher position with respect to the position of a lower end portion 28 and forming an overflow wall 47 for a safety overflow which allows a safe and controlled emptying of the fall duct 16 in the event of obstruction of the intake nozzle 18.
  • the auxiliary opening 46 with the overflow wall 47 is formed in an upper part of the deviation portion 45, while a lower part of the deviation portion 45 forms an accumulation space 49, in other words a lowered sink, such as not to cause the level of the liquid to rise beyond the overflow wall 47 during the operation of the intake nozzle 18 without obstructions.
  • accumulation space or lowered sink 49 may also be made with geometries different with respect to that of the deviation portion 45 shown in the Figures.
  • the deviation portion 45 is oriented so as to guide the flow of water and detergent, during operation without obstructions, at a distance from the overflow wall 47, to avoid unwanted overflows of liquids in the absence of liquid accumulation.
  • the auxiliary opening 46 may form a connection flange for a connection to a corresponding receiving opening 48 formed in a front wall of the washing tub 5 ( Figure 12 ).
  • the auxiliary opening 46 and the overflow wall 47 are positioned at the receiving opening 48 of the (fore wall of the) washing tub 5, for example, the position of the auxiliary opening 46 coincides with the position of the receiving opening 48 and the overflow wall 47 may be formed or positioned inside the receiving opening 48 and, possibly, on the same plane of the fore wall of the washing tub 5.
  • Figure 6 shows, for example, that the fall duct forms a single or double connection flange 61 externally about the auxiliary opening 46 and the overflow wall 47, in which the connection flange 61 engages an edge of the receiving opening 48 of the washing tub 5.
  • the level of a free overflow edge 62 of the overflow wall 47 is below: a lower bottom wall of the detergent container 13 or an intermediate bellow-shaped portion (44) of the fall duct (16), and above:
  • the fall duct 16 feeds the intake nozzle 18 due to the pressure of the mains water or the effect of pumping means of the washing machine 1 which act on the mains water or on the mixture of detergent and mains water.
  • a drain duct 51 associated with a drain pump 52, is connected to the bottom 50 of the washing tub 5, to remove the washing liquid from the tub 5 and to control, together with the one or more supply solenoid valves 14, 14' the level of liquid inside the tub 5.
  • an electrical resistor 53 may be provided, arranged inside the tub 5, in particular, on the bottom of the tub 50, in the gap between the wall of the tub 5 and the laundry drum 11.
  • the laundry drum 11 may be activated in rotation by means of an electric motor 54 and a transmission 55, for example, a belt transmission.
  • the operation of the washing machine 1 is controlled by an electronic control unit 56, operatively connected to a user control interface 57 positioned on an outer wall of the housing 2, and which allows to select the washing cycles and the features thereof.
  • the control unit 56 controls the various components of the washing machine 1 to automatically wash the laundry.
  • control unit 56 is configured so as to rotate the laundry drum 11 and simultaneously introduce or spray the mixture of water and detergent through the intake nozzle 18 inside the laundry drum 11.
  • the rotary motion and the centrifugal force arrange and distribute the laundry in an annular area along the side wall (cylindrical or conical) of the drum 11 and continuously pass it under the jet of the water-detergent mixture which thus reaches in a direct manner a large laundry surface.
  • a further supply duct 15' may be provided, connecting a second supply valve 14' in flow communication with the detergent container 13 so as to direct a further flow of mains water in the detergent container 13 and, by selecting and combining the two independent flows (e.g., only the flow from the first duct, only the flow from the second duct or a cross flow from the first and second ducts), rinse detergents and additives from different detergent compartments of the detergent container 13.
  • the washing machine 1 may also comprise a system for recirculating the washing liquid from the bottom of the tub to the laundry drum, similarly to the recirculation systems described with reference to the background art.
  • the present invention also relates to the washing method described with exemplary reference to the washing machine 1, the features of which are not repeated herein for the sake of brevity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Centrifugal Separators (AREA)
EP20190850.6A 2019-09-19 2020-08-13 Waschmaschine Active EP3795734B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000016712A IT201900016712A1 (it) 2019-09-19 2019-09-19 Macchina lavabiancheria

Publications (2)

Publication Number Publication Date
EP3795734A1 true EP3795734A1 (de) 2021-03-24
EP3795734B1 EP3795734B1 (de) 2023-07-12

Family

ID=69375767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20190850.6A Active EP3795734B1 (de) 2019-09-19 2020-08-13 Waschmaschine

Country Status (3)

Country Link
EP (1) EP3795734B1 (de)
ES (1) ES2961393T3 (de)
IT (1) IT201900016712A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114990855A (zh) * 2022-06-01 2022-09-02 海信（山东）冰箱有限公司 一种滚筒洗衣机
CN115305689A (zh) * 2021-05-04 2022-11-08 惠而浦公司 在组合洗衣机/烘干机单元中传输处理空气的方法和设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2066675A2 (es) * 1992-07-21 1995-03-01 Mayc Sa Mejoras en los dispositivos antirrebosamiento de agua en cubas de lavadoras.
DE69013663T2 (de) * 1990-01-09 1995-03-02 Ciapem Waschmaschine ausgerüstet mit einem Überlauf.
JP2004194716A (ja) * 2002-12-16 2004-07-15 Sharp Corp ドラム式洗濯機
US20090293202A1 (en) * 2006-06-29 2009-12-03 Bsh Bosch Und Siemens Hausgeraete Gmbh Washing Machine Comprising a Controllable Water Supply and Method for Operating a Washing Machine of this Type
US20120060568A1 (en) * 2009-04-09 2012-03-15 Electrolux Home Products Corporation N.V. Washing Machine With An Improved Washing/Rinsing-Liquid Inlet Circuit
WO2019161898A1 (en) * 2018-02-22 2019-08-29 Electrolux Appliances Aktiebolag Laundry washing machine equipped with a liquid supply line

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69013663T2 (de) * 1990-01-09 1995-03-02 Ciapem Waschmaschine ausgerüstet mit einem Überlauf.
ES2066675A2 (es) * 1992-07-21 1995-03-01 Mayc Sa Mejoras en los dispositivos antirrebosamiento de agua en cubas de lavadoras.
JP2004194716A (ja) * 2002-12-16 2004-07-15 Sharp Corp ドラム式洗濯機
US20090293202A1 (en) * 2006-06-29 2009-12-03 Bsh Bosch Und Siemens Hausgeraete Gmbh Washing Machine Comprising a Controllable Water Supply and Method for Operating a Washing Machine of this Type
US20120060568A1 (en) * 2009-04-09 2012-03-15 Electrolux Home Products Corporation N.V. Washing Machine With An Improved Washing/Rinsing-Liquid Inlet Circuit
WO2019161898A1 (en) * 2018-02-22 2019-08-29 Electrolux Appliances Aktiebolag Laundry washing machine equipped with a liquid supply line

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115305689A (zh) * 2021-05-04 2022-11-08 惠而浦公司 在组合洗衣机/烘干机单元中传输处理空气的方法和设备
CN114990855A (zh) * 2022-06-01 2022-09-02 海信（山东）冰箱有限公司 一种滚筒洗衣机
CN114990855B (zh) * 2022-06-01 2024-08-16 海信冰箱有限公司 一种滚筒洗衣机

Also Published As

Publication number Publication date
IT201900016712A1 (it) 2021-03-19
EP3795734B1 (de) 2023-07-12
ES2961393T3 (es) 2024-03-11

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