EP2255715A2 - Haushaltswaschmaschine, insbesondere Geschirrspüler, mit einem verbesserten oberen Hydraulikkreislauf - Google Patents

Haushaltswaschmaschine, insbesondere Geschirrspüler, mit einem verbesserten oberen Hydraulikkreislauf Download PDF

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Publication number
EP2255715A2
EP2255715A2 EP10180363A EP10180363A EP2255715A2 EP 2255715 A2 EP2255715 A2 EP 2255715A2 EP 10180363 A EP10180363 A EP 10180363A EP 10180363 A EP10180363 A EP 10180363A EP 2255715 A2 EP2255715 A2 EP 2255715A2
Authority
EP
European Patent Office
Prior art keywords
washing machine
machine according
sprayer
hydraulic
outlet
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
EP10180363A
Other languages
English (en)
French (fr)
Other versions
EP2255715A3 (de
EP2255715B1 (de
Inventor
Davide Milone
Gianluca Tigani
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.)
Whirlpool EMEA SpA
Original Assignee
Indesit Co 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 Indesit Co SpA filed Critical Indesit Co SpA
Priority to PL10180363T priority Critical patent/PL2255715T3/pl
Publication of EP2255715A2 publication Critical patent/EP2255715A2/de
Publication of EP2255715A3 publication Critical patent/EP2255715A3/de
Application granted granted Critical
Publication of EP2255715B1 publication Critical patent/EP2255715B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/50—Racks ; Baskets
    • A47L15/508—Hydraulic connections for racks
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A47L15/23—Rotary spraying devices moved by means of the sprays

Definitions

  • the present invention relates to a washing machine, in particular a dishwasher, according to the preamble of claim 1.
  • washing machines in particular dishwashers, usually comprise two load racks for loading the crockery to be washed, in particular an upper load rack and a lower load rack.
  • the crockery is washed by means of two rotating spray arms, which spray a wash fluid toward the load racks and are supplied with pressurized fluid from a wash pump, typically housed in the machine base.
  • the lower rotating spray arm is generally supplied and supported from below, by means of a tubular element which is directly connected to the body of the supply pump, whereas the upper rotating spray arm is supplied from above.
  • the rotating spray arm is supplied from above through a nozzle housed on the ceiling of the wash tub, which is supplied through a duct coming from the supply pump.
  • the nozzle outputs a liquid jet downwards, which after having crossed an "air break” reaches a cone-shaped receiving element secured centrally to the upper rack of the machine; the "air break” separating the nozzle from the receiving element is provided in order to allow the rack to slide horizontally, for the purpose of allowing the normal extraction and insertion operations required for loading and removing the crockery.
  • the liquid jet sprayed by the nozzle crosses the "air break” and enters the cone-shaped receiving element at high speed, thus hitting the walls of the latter and generating noise which virtually persists for the whole duration of the wash cycle, thus making the appliance quite noisy.
  • the "air break" may be longer or shorter depending on the operating condition of the dishwasher.
  • washing machines have been proposed equipped with means adapted to eliminate the air break between the upper nozzle and the cone-shaped receiving element.
  • the washing machines known in the art comprise a wash tub housing an upper rack, a sprayer being associated with the underside thereof; connection means are also provided which allow to connect said sprayer to a first end of a tubular element made of plastic material, said tubular element being adapted to engage into a hydraulic outlet being present on the back wall of the tub.
  • washing machines which comprise connection means between the sprayer and said tubular element, said connection means being so provided as to allow wash fluid to leak.
  • this leakage allows the wash fluid to act substantially as a lubricating medium.
  • a further drawback of the above solution is that the provision of a leakage of wash fluid, in particular at friction points between the sprayer and the connection means connecting it to the tubular element, inevitably implies a higher consumption of wash fluid and a reduction in the wash fluid pressure within the sprayer, resulting in worse crockery washing results.
  • a second end of said tubular element comprises a connection device adapted to engage into a hydraulic outlet being present on the back wall of the wash tub; in practice, said hydraulic outlet is the outlet of a supply duct connected to a supply pump of the washing machine.
  • connection devices of the washing machines comprise two inlets located vertically one on top of the other, which allow the connection device to be connected to the hydraulic outlet with the rack mounted in either position (higher or lower) inside the wash tub.
  • the present invention provides a washing machine, in particular a dishwasher, incorporating the features set out in the appended claims, which are intended as an integral part of the present description.
  • reference number 10 designates the upper portion of a wash tub of a washing machine, in particular a dishwasher, manufactured according to the teachings of the present invention.
  • Said tub 10 houses an upper rack 20, which is associated with an upper hydraulic circuit comprising:
  • hydraulic outlet 70 is the outlet of a supply duct 11 connected to a supply pump of the dishwasher, which is not shown in the drawing for simplicity's sake.
  • Tubular element 40 is preferably made of plastic material, whereas linking device 60 is preferably provided in one piece with second end 42 of said tubular element 40.
  • said connection means comprise a bush 50 made of a material which is different from that used for manufacturing said sprayer 30.
  • Sprayer 30 and the bush 50 are made of plastic materials, said plastic materials ensuring good dimensional stability and high compression and shock resistance.
  • said bush 50 is made of acetalic resin, while said sprayer 30 is made of polypropylene.
  • sprayer 30 comprises an upper shell 32 and a lower shell 33.
  • Sprayer 30 is located underneath upper rack 20, and said upper shell 32 comprises a plurality of nozzles 34 facing in different directions, which allow the wash fluid to be sprayed onto upper rack 20.
  • said bush 50 comprises a substantially cylindrical body 51, a base 52 having a larger diameter than body 51, and clamping means 53 for connecting it to first end 41 of tubular element 40.
  • the rotation of sprayer 30 essentially takes place about body 51 of bush 50, said body 51 being adapted to be inserted into an aperture 31 of said sprayer 30; in particular, said aperture 31 is obtained on upper shell 32 and on lower shell 33.
  • Said body 51 comprises a plurality of openings 54 which allow the wash fluid to flow into sprayer 30.
  • Bush 50 also comprises a protrusion 55 connected to base 52 and located near said plurality of openings 54, which protrusion divides the wash fluid flow and consequently makes it easier for the wash fluid to flow from the body 51 of bush 50 into sprayer 30.
  • upper rack 20 of the washing machine is adapted to slide in said tub 10 and can be adjusted to two different height positions.
  • hydraulic outlet 70 comprises:
  • the linking device 60 comprises two inlets 61, 62 arranged vertically one on top of the other, in particular an upper inlet 61 and a lower inlet 62.
  • upper inlet 61 of linking device 60 connects to first closed outlet 72 of hydraulic outlet 70 when rack 20 is slid into the dishwasher and pushed against the rear of tub 10.
  • lower inlet 62 connects to open outlet 71, and when the wash fluid supply pump is started, the wash fluid from supply duct 11 and from hydraulic outlet 70 will flow into linking device 60 through said lower inlet 62 and into the tubular element 40, bush 50 and sprayer 30, thus turning said sprayer 30.
  • first closed outlet 72 and second closed outlet 73 have a substantially conical shape, so as to facilitate the connection between hydraulic outlet 70 and linking device 60 when the latter enters the dishwasher as rack 20 is pushed against the rear of tub 10.
  • the upper hydraulic circuit of the washing machine comprises compensation means that allow to compensate for any misalignment between inlets 61, 62 of linking device 60 and outlets 71, 72, 73 of hydraulic outlet 70.
  • said compensation means comprise at least one hooking element 63 which provides a loose coupling to a wire 21 of rack 20, so that said upper hydraulic circuit (i.e. the assembly comprising sprayer 30, tubular element 40, bush 50 and linking device 60) is horizontally pivoted about an axis represented by wire 21.
  • said upper hydraulic circuit i.e. the assembly comprising sprayer 30, tubular element 40, bush 50 and linking device 60
  • This pivoting of the upper hydraulic circuit allows to compensate for any misalignment between inlets 61, 62 of linking device 60 and outlets 71, 72, 73 of hydraulic outlet 70, resulting in an easier connection of the hydraulic circuit to hydraulic outlet 70.
  • Said hooking element 63 essentially has an upside-down U shape and comprises a vertical slot in which wire 21 of rack 20 can move vertically and turn.
  • Hooking element 63 is preferably obtained on the body of linking device 60, in particular on the upper portion of said linking device 60.
  • said upper inlet 61 and said lower inlet 62 are both provided with a gasket 64, in particular made of silicone-based material.
  • Said gaskets 64 may be secured to the inside of linking device 60 and at said inlets 61, 62 by using at least one fastening plate 65 comprising apertures matching outlets 71, 72, 73 of hydraulic outlet 70.
  • linking device 60 comprises tongues 66 adapted to be coupled to at least one rib 74 being present on hydraulic outlet 70; this coupling allows to provide an easier and guided connection between linking device 60 and hydraulic outlet 70.
  • the bush for connecting the tubular element to the sprayer is made of a plastic material being different from that used for manufacturing the sprayer, said bush being preferably made of acetalic resin and the sprayer being preferably made of polypropylene, allows to obtain a washing machine, in particular a dishwasher, such that the proper rotation and operation of the sprayer is not jeopardized.
  • Another advantage offered by the particular configuration of the bush and of the sprayer according to the present invention is that this configuration allows to reduce the friction between said elements without having to use a leakage of wash fluid, thus determining neither a higher wash fluid consumption of the washing machine nor a drop of pressure in the wash fluid within the sprayer, which otherwise would result in worse crockery washing results.
  • An additional advantage provided by the washing machine, in particular a dishwasher, according to the present invention is that the use of compensation means for the upper hydraulic circuit of the washing machine allows to compensate for any misalignment between the inlets of the connection device and the outlets of the hydraulic outlet, thus making it easier to connect the hydraulic circuit to the hydraulic outlet, in particular in all those cases wherein the upper rack of the washing machine can be adjusted to at least two different positions in the wash tub and whenever a heavy load is placed on said upper rack.
  • the washing machine, in particular the dishwasher described herein by way of example may be subject to many possible variations without departing from the novelty spirit of the inventive idea; it is also clear that in the practical realization of the invention the illustrated details may have different shapes or be replaced with other technically equivalent elements. It can therefore be easily understood that the present invention is not limited to the above-described washing machine, but may be subject to many modifications, improvements or replacements of equivalent parts and elements without departing from the inventive idea, as clearly specified in the following claims.

Landscapes

  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Detergent Compositions (AREA)
EP10180363.3A 2006-09-07 2007-08-23 Haushaltswaschmaschine, insbesondere Geschirrspüler, mit einem oberen Hydraulikkreislauf Not-in-force EP2255715B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10180363T PL2255715T3 (pl) 2006-09-07 2007-08-23 Maszyna myjąca dla gospodarstwa domowego, zwłaszcza zmywarka do naczyń, zawierająca ulepszony górny obwód hydrauliczny

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000641A ITTO20060641A1 (it) 2006-09-07 2006-09-07 Macchina di lavaggio di uso domestico, in particolare una lavastoviglie, comprendente un circuito idraulico superiore di tipo migliorato
EP07804813.9A EP2059160B1 (de) 2006-09-07 2007-08-23 Haushaltswaschmaschine, insbesondere geschirrspüler, mit einem oberen hydraulikkreislauf

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP07804813.9A Division-Into EP2059160B1 (de) 2006-09-07 2007-08-23 Haushaltswaschmaschine, insbesondere geschirrspüler, mit einem oberen hydraulikkreislauf
EP07804813.9A Division EP2059160B1 (de) 2006-09-07 2007-08-23 Haushaltswaschmaschine, insbesondere geschirrspüler, mit einem oberen hydraulikkreislauf
EP07804813.9 Division 2007-08-23

Publications (3)

Publication Number Publication Date
EP2255715A2 true EP2255715A2 (de) 2010-12-01
EP2255715A3 EP2255715A3 (de) 2014-07-09
EP2255715B1 EP2255715B1 (de) 2015-09-09

Family

ID=38805636

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07804813.9A Active EP2059160B1 (de) 2006-09-07 2007-08-23 Haushaltswaschmaschine, insbesondere geschirrspüler, mit einem oberen hydraulikkreislauf
EP10180363.3A Not-in-force EP2255715B1 (de) 2006-09-07 2007-08-23 Haushaltswaschmaschine, insbesondere Geschirrspüler, mit einem oberen Hydraulikkreislauf

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07804813.9A Active EP2059160B1 (de) 2006-09-07 2007-08-23 Haushaltswaschmaschine, insbesondere geschirrspüler, mit einem oberen hydraulikkreislauf

Country Status (5)

Country Link
EP (2) EP2059160B1 (de)
IT (1) ITTO20060641A1 (de)
PL (1) PL2255715T3 (de)
RU (1) RU2417731C2 (de)
WO (1) WO2008029222A2 (de)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008016485A1 (de) * 2008-03-31 2009-10-01 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine
US20120097198A1 (en) * 2009-06-23 2012-04-26 Electrolux Home Products Corporation N.V. Dishwasher, especially domestic dishwasher
ITUD20110182A1 (it) * 2011-11-11 2013-05-12 Steelco Spa Dispositivo per il collegamento idraulico e meccanico di un carrello porta-oggetti da lavare ad un circuito di alimentazione di un liquido di lavaggio per una macchina di lavaggio di oggetti
ITTO20130573A1 (it) * 2013-07-09 2015-01-10 Indesit Co Spa Dispositivo irroratore di liquido, particolarmente per macchina lavastoviglie
EP3040010B1 (de) 2014-12-31 2017-08-02 Whirlpool EMEA S.p.A Haushaltsgeschirrspülmaschine
EP3040011B1 (de) 2014-12-31 2019-07-24 Whirlpool EMEA S.p.A Haushaltsgeschirrspülmaschine
EP3040012B1 (de) 2014-12-31 2018-12-12 Whirlpool EMEA S.p.A Geschirrspülmaschine
US10524634B2 (en) 2017-09-29 2020-01-07 Midea Group Co., Ltd. Dishwasher with combined liquid and air sprayers
US10531781B2 (en) 2017-09-29 2020-01-14 Midea Group Co., Ltd. Dishwasher with discretely directable tubular spray elements
US10631708B2 (en) 2018-09-14 2020-04-28 Midea Group Co., Ltd. Dishwasher with docking arrangement for elevation-adjustable rack
US10765291B2 (en) 2018-09-14 2020-09-08 Midea Group Co., Ltd. Dishwasher with check valve in rotatable docking port
US11000176B2 (en) 2018-09-14 2021-05-11 Midea Group Co., Ltd. Dishwasher with rotatable diverter valve
US11071440B2 (en) 2018-09-14 2021-07-27 Midea Group Co., Ltd. Dishwasher with rack-mounted conduit return mechanism
US11045066B2 (en) 2019-03-11 2021-06-29 Midea Group Co., Ltd. Dishwasher with keyed coupling to rack-mounted conduit
US11484183B2 (en) 2019-09-30 2022-11-01 Midea Group Co., Ltd. Dishwasher with image-based object sensing
US11191416B2 (en) 2019-09-30 2021-12-07 Midea Group Co., Ltd. Dishwasher with image-based position sensor
US11026559B2 (en) 2019-09-30 2021-06-08 Midea Group Co., Ltd. Dishwasher with image-based fluid condition sensing
US11259681B2 (en) 2019-09-30 2022-03-01 Midea Group Co., Ltd Dishwasher with image-based diagnostics
US11464389B2 (en) 2019-09-30 2022-10-11 Midea Group Co., Ltd. Dishwasher with image-based detergent sensing
US11399690B2 (en) 2019-09-30 2022-08-02 Midea Group Co., Ltd. Dishwasher with cam-based position sensor
US11202550B2 (en) 2019-11-20 2021-12-21 Midea Group Co., Ltd. Dishwasher thermal imaging system
US11185209B2 (en) 2019-11-20 2021-11-30 Midea Group Co., Ltd. Dishwasher steam generator
US11497374B2 (en) 2020-02-19 2022-11-15 Midea Group Co., Ltd. Dishwasher with wall-mounted rotatable conduit
US11412912B2 (en) 2020-09-21 2022-08-16 Midea Group Co., Ltd. Dishwasher with tubular spray element slip ring alignment
US11484180B2 (en) 2020-11-11 2022-11-01 Midea Group Co., Ltd. Dishwasher with tubular spray element including multiple selectable spray patterns
US20230066054A1 (en) * 2021-08-30 2023-03-02 Whirlpool Corporation Dishwasher
US11826001B2 (en) 2022-02-15 2023-11-28 Midea Group Co., Ltd. Dishwasher with tubular spray element including elongated metal tube and retaining tab for mounting support member thereto

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Also Published As

Publication number Publication date
PL2255715T3 (pl) 2016-01-29
EP2059160B1 (de) 2015-03-04
RU2417731C2 (ru) 2011-05-10
EP2059160A2 (de) 2009-05-20
ITTO20060641A1 (it) 2008-03-08
EP2255715A3 (de) 2014-07-09
WO2008029222A3 (en) 2008-09-04
RU2008145054A (ru) 2010-05-20
EP2255715B1 (de) 2015-09-09
WO2008029222A2 (en) 2008-03-13

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