WO2018219470A1 - Dispositif de pulvérisation de liquide pour lave-vaisselle à performances de nettoyage améliorées - Google Patents

Dispositif de pulvérisation de liquide pour lave-vaisselle à performances de nettoyage améliorées Download PDF

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Publication number
WO2018219470A1
WO2018219470A1 PCT/EP2017/063420 EP2017063420W WO2018219470A1 WO 2018219470 A1 WO2018219470 A1 WO 2018219470A1 EP 2017063420 W EP2017063420 W EP 2017063420W WO 2018219470 A1 WO2018219470 A1 WO 2018219470A1
Authority
WO
WIPO (PCT)
Prior art keywords
spraying device
liquid spraying
liquid
tub
hub
Prior art date
Application number
PCT/EP2017/063420
Other languages
English (en)
Inventor
Yusuf Koc
Furkan BAYAV
Mehmet Kaya
Ozcan Hatipoglu
Nevin AYATA AKKAS
Cihat SOFRACI
Original Assignee
Arcelik Anonim Sirketi
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 Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Priority to PCT/EP2017/063420 priority Critical patent/WO2018219470A1/fr
Priority to EP17730081.1A priority patent/EP3629872A1/fr
Publication of WO2018219470A1 publication Critical patent/WO2018219470A1/fr

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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
    • A47L15/14—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 washers, in particular to dishwashers.
  • the present invention more particularly relates to the liquid spraying devices of the dishwasher.
  • a dishwasher generally comprises: a tub for receiving the articles to be washed/rinsed with a washing/rinsing liquid; a pivotable door for opening/closing the tub; an upper article rack, a lower article rack and optionally a cutlery tray which are extendably disposed into the tub; at least two liquid spraying devices for spraying the washing/rinsing liquid respectively towards the upper article rack and the lower article rack, wherein the liquid spraying devices are respectively disposed onto the bottom of the tub, and to the underside of the upper article rack, and wherein each liquid spraying device comprises a rotating spraying means which has a hub that has a center of rotation, two diametrically opposed arms extending from the hub, and a plurality of nozzles disposed along each arm for spraying the liquid into the tub; a cutlery basket which is removably disposed into the lower article rack; a supply means for supplying the liquid by means of a circulation pump through the conduits to the liquid spraying devices
  • the cleaning cycle generally includes a cold washing step, a main washing step, a rinsing step, and a drying step.
  • the circulation pump circulates the liquid that is collected in the sump to the liquid spraying devices.
  • the rotating spraying means are set into rotary movement as the liquid is jetted out of the inclined nozzles which generate a rotational thrust.
  • the inclined nozzles which generate the rotational thrust are generally located further away from the hub and close to the tips of the arms.
  • the geometry and the position of the nozzles are generally determined such that the liquid can be effectively sprayed over the surface of the articles inside the upper/lower article racks.
  • the flow rate and the pressure of the liquid jets positively influence the cleaning performance.
  • the rotating spraying means traverses a circular area.
  • the tub is parallelepiped.
  • the rotating spraying means is provided with nozzles that eject the liquid directly towards the corners.
  • the jets of liquid hit the articles in the upper article rack and the lower article rack.
  • the dirt on the articles is dissolved under the influence of the cleansing agent and the heat of the liquid.
  • the liquid drips from the articles down into the sump or flows along the surface of the tub into the sump.
  • the dirt is partially removed from the liquid through the filters in the sump during the circulation.
  • WO2009132949 discloses a prior art dishwasher.
  • a problem with the prior art dishwasher is that the dirt on the articles cannot always be sufficiently removed.
  • the flow rate and the pressure of the liquid can be increased. Also the duration of the cleaning cycle can be prolonged.
  • these measures increase the operating costs, and thus the user satisfaction decreases.
  • An objective of the present invention is to provide a liquid spraying device for a dishwasher that solves the aforementioned problems of the prior art in a cost effective way and which enables an improved cleaning performance.
  • the liquid spraying device of the present invention comprises a driving means for causing the center of rotation of the hub to oscillate back and forth along a track through a reference position.
  • a major advantageous effect of the present invention is that the oscillating hub increases the area onto which the liquid is directly jetted through the nozzles. Thereby, the articles inside the tub can be more effectively washed and rinsed, and thus the cleaning performance can be improved.
  • the liquid spraying device of the present inventions is not limited for use in dishwashers and may be used for cleaning objects in other washing systems.
  • the dishwasher of the present invention comprises one or more liquid spraying devices.
  • one liquid spraying device is disposed onto the bottom of the tub below the lower article rack. This embodiment is particularly advantageous as the articles inside the lower article rack can be more effectively washed and rinsed, and thus cleaning performance can be improved.
  • one liquid spraying device is disposed onto the underside of the upper article rack. This embodiment is particularly advantageous as the articles inside the upper article rack can be more effectively washed and rinsed, and thus cleaning performance can be improved.
  • one liquid spraying device is disposed onto the ceiling of the tub above the cutlery tray. This embodiment is particularly advantageous as the articles inside the cutlery tray can be more effectively washed and rinsed, and thus cleaning performance can be improved.
  • one or more liquid spraying devices are disposed onto the side walls of the tub. These embodiments are particularly advantageous as the articles close to side walls of the tub can be more effectively washed and rinsed, and thus cleaning performance can be improved.
  • the cleaning liquid is supplied to the respective liquid spraying device through a flexible connection of the supply means.
  • This embodiment is particularly advantageous as the flexible connection can compensate for the oscillating movement of the hub.
  • the driving means causes the center of rotation of the hub to oscillate in a horizontal plane along a track which is straight.
  • the axis of rotation of the hub is vertically aligned during the oscillation.
  • the track is aligned between two diagonal corners of the tub.
  • the driving means comprises a reciprocating rack-and-pinion mechanism.
  • the rack-and-pinion mechanism can be arranged above or below the hub. This embodiment is particularly advantageous as the reciprocating rack-and-pinion is reliable and cost effective both in terms of material and labor.
  • the size of the rack and the pinion, and the number and the shape of the teeth in the rack-and-pinion mechanism can be determined in accordance with the dimensions of the track and the tub.
  • the driving means causes the center of rotation of the hub to oscillate in a vertical plane along a track which is vertical.
  • the axis of rotation of the hub is vertically aligned during the oscillation.
  • the driving means comprises a reciprocating cylinder-and-cam mechanism.
  • the cylinder-and-cam mechanism can be arranged above or below the hub. This embodiment is particularly advantageous as the reciprocating cylinder-and-cam mechanism is reliable and cost effective both in terms of material and labor.
  • the rotating spraying means is provided without nozzles that eject the cleaning liquid directly towards the corners of the tub thanks to the improved cleaning performance in the corner regions.
  • This embodiment is particularly advantageous as the flow rate and the pressure of the liquid that is jetted form the nozzles can be increased, and thus the cleaning performance can be further increased.
  • This embodiment is also particularly advantageous as the liquid that directly hits the side walls can be eliminated or reduced as much as possible, and thus the disturbing noises can be further reduced during the cleaning cycle. Thereby, the overall sound level can be further improved.
  • the track of the liquid spraying device is adjustable. This embodiment is particularly advantageous as the cleaning performance can be more flexibly improved in accordance with the specific arrangement of the upper/lower article racks.
  • the rotating spray means can be mounted into the tub at the aforementioned various positions through a mounting means.
  • the mounting means comprises feet or hooks. This embodiment is particularly advantageous as the rotating spray means can be easily assembled into the tub.
  • one or more nozzles are inclined to generate rotational thrust so as to rotate the rotating spraying means when jetting the cleaning liquid into the tub.
  • This embodiment is particularly advantageous as the need for using a motor that rotates the hub can be obviated.
  • a motor for rotating the hub of the rotating spraying means may be used.
  • the rotating spray means is provided in various different forms.
  • the rotating spray means is provided with one or more arms extending from the hub.
  • the rotating spray means is provided without any arms.
  • Figure 1 – is a schematic perspective view of a dishwasher which has at least one liquid spraying device according to an embodiment of the present invention
  • Figure 2 – is a schematic partial perspective inner view of the dishwasher of Fig. 1;
  • Figure 3 – is a schematic partial perspective view of the liquid spraying device of Fig. 2;
  • Figure 4 – is a schematic partial perspective view of the reciprocating rack-and-pinion mechanism in the liquid spraying device of Fig. 2;
  • Figure 5 – is a schematic partial top view of the reciprocating rack-and-pinion mechanism in the liquid spraying device of Fig. 2, wherein the arrows show the reciprocating motion;
  • Figure 6 – is a schematic partial top view of the reciprocating rack-and-pinion mechanism in the liquid spraying device of Fig. 2, wherein the pinion has been omitted.
  • the liquid spraying device (1) is suitable for use in the dishwasher (2) (Fig. 1 and Fig. 2).
  • the dishwasher (2) comprises: a tub (3) for receiving the articles to be cleaned with a cleaning liquid; a lower article rack (not shown) and an upper article rack (not shown) which are extendably disposed into the tub (3); and a door (19) for accessing the tub (3), and for closing the tub (3) during the cleaning cycle (Fig. 2).
  • the liquid spraying device (1) comprises: a rotating spraying means (4) (Fig. 3).
  • the rotating spraying means (4) comprises: a hub (5) which has a center of rotation (C); and one or more nozzles (6) for spraying the cleaning liquid into the tub (3).
  • the liquid spraying device (1) of the present invention further comprises: a driving means (7) for causing the center of rotation (C) of the hub (5) to oscillate back and forth along a track (8) through a reference position (P) (Fig. 3 and Fig. 5).
  • the reference position (P) is on the track (8).
  • the dishwasher (2) of the present invention further comprises: one or more liquid spraying devices (1); and a supply means (17) for supplying the cleaning liquid to the liquid spraying devices (1) and for circulating the cleaning liquid through the tub (3) (Fig. 2).
  • one liquid spraying device (1) is disposed onto the bottom of the tub (3) below the lower article rack (Fig. 2).
  • one liquid spraying device (1) is disposed onto the underside of the upper article rack (not shown). In this embodiment, the liquid spraying device (1) can be moved together with the upper article rack.
  • the supply means (17) comprises one or more flexible connections (18) each for supplying the cleaning liquid to the respective liquid spraying device (1) (Fig. 2).
  • the flexible connection (18) comprises an expanding/contracting bellow (not shown).
  • the driving means (7) is further adapted to cause the center of rotation (C) of the hub (3) to oscillate in a horizontal plane (H) along the track (8) which is straight (Fig. 2).
  • the axis of rotation (A) of the hub (5) is vertically aligned during the oscillation (Fig.2).
  • the track (8) is aligned between two diagonal corners (9) of the tub (3) (Fig. 2).
  • the driving means (7) comprises a reciprocating rack-and-pinion mechanism (10) (Fig. 4 to Fig. 6).
  • the rack-and-pinion mechanism (10) comprises: a pinion (11) that is fixed to the hub (5); and a rack (12) for meshing with the pinion (11), wherein the rack (12) extends along the track (8), and wherein the rack (12) supports and guides the pinion (11).
  • the pinion (11) has a passage (11a) for the liquid (Fig. 4).
  • the driving means (7) is adapted to cause the center of rotation (C) of the hub (5) to oscillate in a vertical plane along a track (8) which is vertical (not shown).
  • the axis of rotation (A) of the hub (5) is vertically aligned during the oscillation.
  • the driving means (7) comprises a reciprocating cylinder-and-cam mechanism (not shown).
  • the cylinder-and-cam mechanism comprises: a cam (not shown) that is fixed to the hub (5); and a slotted-cylinder (not shown) for meshing with the cam, wherein the slotted-cylinder extends along the track (8).
  • the rotating spraying means (4) is provided without nozzles (6) for ejecting the cleaning liquid directly towards the corners (9) of the tub (3).
  • the liquid spraying device (1) further comprises: an alignment means (13) for adjusting the alignment of the track (8) (Fig. 4).
  • the liquid spraying device (1) further comprises: a mounting means (14) for mounting the rotating spray means (4) into the tub (3) (Fig. 4).
  • the mounting means (11) comprises one or more feet (15) (Fig. 4).
  • one or more nozzles (6) are inclined to generate rotational thrust so as to rotate the rotating spraying means (4) when jetting the cleaning liquid into the tub (5) (Fig. 3).
  • the liquid spraying device (1) further comprises a motor (not shown) for rotating the rotating spraying means (4).
  • the liquid spraying device (1) comprises two diametrically opposed arms (16) extending from the hub (5) (Fig. 3). In this embodiment, one or more nozzles (6) are disposed along each arm (16).
  • a major advantageous effect of the present invention is that the oscillating hub (5) increases the area onto which the liquid is directly jetted through the nozzles (6). Thereby, the articles inside the tub (3) can be more effectively washed and rinsed, and thus the cleaning performance can be improved.
  • Other advantageous effects of the present invention can be taken from the above-described embodiments.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Abstract

La présente invention concerne un dispositif de pulvérisation de liquide (1) destiné à être utilisé dans un lave-vaisselle (2) comprenant : une cuve (3) destinée à recevoir les articles à nettoyer avec un liquide de nettoyage. Le dispositif de pulvérisation de liquide (1) comprend : un moyen de pulvérisation rotatif (4) qui comprend : un moyeu (5) qui a un centre de rotation (C) ; et une ou plusieurs buses (6) destinées à pulvériser le liquide de nettoyage dans la cuve (3).
PCT/EP2017/063420 2017-06-02 2017-06-02 Dispositif de pulvérisation de liquide pour lave-vaisselle à performances de nettoyage améliorées WO2018219470A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2017/063420 WO2018219470A1 (fr) 2017-06-02 2017-06-02 Dispositif de pulvérisation de liquide pour lave-vaisselle à performances de nettoyage améliorées
EP17730081.1A EP3629872A1 (fr) 2017-06-02 2017-06-02 Dispositif de pulvérisation de liquide pour lave-vaisselle à performances de nettoyage améliorées

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/063420 WO2018219470A1 (fr) 2017-06-02 2017-06-02 Dispositif de pulvérisation de liquide pour lave-vaisselle à performances de nettoyage améliorées

Publications (1)

Publication Number Publication Date
WO2018219470A1 true WO2018219470A1 (fr) 2018-12-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/063420 WO2018219470A1 (fr) 2017-06-02 2017-06-02 Dispositif de pulvérisation de liquide pour lave-vaisselle à performances de nettoyage améliorées

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Country Link
EP (1) EP3629872A1 (fr)
WO (1) WO2018219470A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3970594A1 (fr) * 2020-09-21 2022-03-23 Vestel Elektronik Sanayi ve Ticaret A.S. Lave-vaisselle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1090579A1 (fr) * 1999-10-01 2001-04-11 SMEG S.p.A. Ensemble de buses d'arrosage tournantes pour lave-vaisselle équipé d'un dispositif de déplacement horizontal
EP1132039A2 (fr) * 2000-03-08 2001-09-12 Bonferraro S.p.A. Ensemble de buses d'arrosage tournantes pour lave-vaisselle, équipé d'un dispositif de déplacement horizontal
EP1201178A1 (fr) * 2000-10-27 2002-05-02 Bonferraro S.p.A. Ensemble d'arrosage tournant pour lave vaisselle avec mouvement horizontal alterné
WO2009132949A1 (fr) 2008-05-02 2009-11-05 Arcelik Anonim Sirketi Panier à couverts pour lave-vaisselle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1090579A1 (fr) * 1999-10-01 2001-04-11 SMEG S.p.A. Ensemble de buses d'arrosage tournantes pour lave-vaisselle équipé d'un dispositif de déplacement horizontal
EP1132039A2 (fr) * 2000-03-08 2001-09-12 Bonferraro S.p.A. Ensemble de buses d'arrosage tournantes pour lave-vaisselle, équipé d'un dispositif de déplacement horizontal
EP1201178A1 (fr) * 2000-10-27 2002-05-02 Bonferraro S.p.A. Ensemble d'arrosage tournant pour lave vaisselle avec mouvement horizontal alterné
WO2009132949A1 (fr) 2008-05-02 2009-11-05 Arcelik Anonim Sirketi Panier à couverts pour lave-vaisselle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3970594A1 (fr) * 2020-09-21 2022-03-23 Vestel Elektronik Sanayi ve Ticaret A.S. Lave-vaisselle

Also Published As

Publication number Publication date
EP3629872A1 (fr) 2020-04-08

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