EP2898810A1 - Drehende Sprüheinrichtung für Geschirrspülmaschine - Google Patents

Drehende Sprüheinrichtung für Geschirrspülmaschine Download PDF

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Publication number
EP2898810A1
EP2898810A1 EP14425005.7A EP14425005A EP2898810A1 EP 2898810 A1 EP2898810 A1 EP 2898810A1 EP 14425005 A EP14425005 A EP 14425005A EP 2898810 A1 EP2898810 A1 EP 2898810A1
Authority
EP
European Patent Office
Prior art keywords
socket
sprinkler
sprinkling assembly
coaxial
eccentric connector
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.)
Withdrawn
Application number
EP14425005.7A
Other languages
English (en)
French (fr)
Inventor
Andrea Ambrosi
Boris Milani
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.)
Bonferraro SpA
Original Assignee
Bonferraro 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 Bonferraro SpA filed Critical Bonferraro SpA
Priority to EP14425005.7A priority Critical patent/EP2898810A1/de
Publication of EP2898810A1 publication Critical patent/EP2898810A1/de
Withdrawn legal-status Critical Current

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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 revolving sprinkling assemblies for dishwashers, and in particular to a sprinkling assembly including a device to provide the sprinkler with a planetary motion.
  • This expression refers to a motion in which the sprinkler not only rotates around its own axis of rotation but also follows a circular path around a second axis of rotation, similarly to Earth that in addition to the daily rotation motion also performs the annual revolution motion around the Sun (although the latter motion is elliptical).
  • conventional revolving sprinkling assemblies essentially consist of a horizontal sprinkler provided with at least one propulsion nozzle at one end, as well as with wash nozzles arranged along the sprinkler to sprinkle the dishes contained in the dishwasher rack, and centrally pivoted on a vertical axis hollow socket arranged at the outlet of a water supply duct. Since the rotation axis of the sprinkler is fixed, the resulting paths followed by the nozzles consist of circumferences centered on said axis whereby the above-mentioned assembly directly sprinkles always and only the surfaces of the dishes which are along said circular paths, with a limited washing effectiveness.
  • IT 1263057 discloses a revolving sprinkling assembly of planetary type capable of directly sprinkling a much greater surface of the dishes thanks to the combination of the motion of a lower rotating sprinkler with that of at least another upper revolving sprinkler mounted in an eccentric position on the lower one, the sprinkling assembly yet retaining the same horizontal overall dimension of a conventional sprinkling assembly.
  • an upper revolving sprinkler of reduced size is eccentrically mounted on a conventional lower rotating sprinkler so that the motion of the upper sprinkler is the combination of two rotational motions and its nozzles follow complex trajectories. In this way the dishes are reached by the jets of water, coming from different points with different angles, emitted by the two sprinklers whereby the washing is more accurate and effective.
  • a first drawback lies in its greater vertical dimension, which makes it difficult to use this configuration for the sprinkling assembly of the upper rack of a dishwasher with stacked racks.
  • such a sprinkling assembly is placed on the ceiling of the wash tank or under the upper rack, and in both cases its greater vertical dimension reduces the space available for placing the dishes in the upper or lower rack respectively.
  • a second drawback of the two-sprinkler structure results from the higher water flow rate required to simultaneously feed the two sprinklers, each of which has a plurality of wash nozzles and at least one end propulsion nozzle. This results in a greater consumption of water, a higher noise level for the larger amount of water that falls on the bottom of the wash tank and the need for a larger wash pump, which costs more and uses more current.
  • the object of the present invention is to provide a revolving sprinkling assembly which overcomes the above-mentioned limitations of prior art planetary sprinkling assemblies.
  • This object is achieved by means of a sprinkling assembly in which the sprinkler is mounted on an end socket of the supply duct through an eccentric connector while a gear coaxial with the sprinkler and driven into rotation by the latter engages a fixed toothed crown coaxial with said socket.
  • the main advantages of the sprinkling assembly according to the present invention are the reduction in cost, size, noise and consumption of water and power with respect to a prior art planetary sprinkling assembly.
  • the present sprinkling assembly includes a single sprinkler, therefore the assembly is small enough to be used also for the upper rack and requires less water that can be supplied by a smaller pump, which is cheaper both in manufacturing and in use.
  • a revolving sprinkling assembly for dishwasher includes a conventional sprinkler 1 provided with a plurality of wash nozzles 1a and at least one end propulsion nozzle 1b.
  • a supply duct (not shown) ending with a socket 2 supplies water to sprinkler 1, which is usually mounted in a rotatable manner directly on said socket 2 through a short central hollow shaft 3 provided with resilient hooks 3a that engage a corresponding peripheral rib 2a formed close to the top of socket 2.
  • a first novel aspect of the present sprinkling assembly is given by the presence of an eccentric connector 4, interposed between socket 2 and shaft 3, that has a bottom portion 5 with a water inlet 5a that is out of axis with respect to a water outlet 6a formed in a top portion 6.
  • Said eccentric connector 4 is further provided with coupling means that substantially reproduce the coupling means usually employed to couple members 2 and 3 between which it is arranged.
  • the bottom portion 5 is provided with resilient hooks 5b similar to the resilient hooks 3 a and suitable to engage rib 2a
  • the top portion 6 is provided with a peripheral rib 6b similar to rib 2a and suitable to be engaged by hooks 3a.
  • sprinkler 1 is rotatably mounted on the top portion 6 of connector 4 so as to rotate with respect thereto around a first vertical axis X coaxial with the water outlet 6a, and connector 4 is in turn rotatably mounted on socket 2 of the supply duct so as to rotate with respect thereto around a second vertical axis Y coaxial with said socket 2 and with the water inlet 5a.
  • a second novel aspect of the present sprinkling assembly resides in the fact that sprinkler 1 is provided with a coaxial gear 7 that engages a toothed crown 8 fixed on the supporting structure of the sprinkling assembly. More specifically, gear 7 is preferably secured at the bottom end of a vertical rod 9, aligned with the rotation axis X, which passes through connector 4 and is made integral with sprinkler 1 through a coupling head 10 that engages a pin 1c formed inside sprinkler 1.
  • the toothed crown 8 is preferably formed along the internal perimeter of a ring 11 arranged coaxial with socket 2 and secured through legs 12 to a flat filter 13 integral with socket 2.
  • Sprinkler 1 is supplied with water coming from the wash pump through a supply duct ending with socket 2, said water passing in the hollow body of the eccentric connector 4 through inlet 5a and outlet 6a prior to reaching shaft 3.
  • FIG. 5 there is illustrated a second embodiment of a sprinkling assembly according to the invention to be mounted under the upper rack of a dishwasher with stacked racks.
  • the elements that are structurally and/or functionally equivalent to the above-described elements of the first embodiment are indicated by the same reference numerals with a prime.
  • the eccentric connector 4' rotatably mounted on the socket 2' of the supply duct 14, which is provided with a hook 14a for the coupling to the rack, has a double elbow shape that is more compact in the vertical direction. Furthermore, the eccentric connector 4' is mounted on socket 2', so as to rotate around a vertical axis Y', through a ring nut 15 that is provided with an external ring 15a having a toothed crown 8' formed along its internal perimeter. This ring nut 15 combines therefore the functions of the peripheral rib 2a and of ring 11 of the first embodiment.
  • the hollow central shaft 3' of sprinkler 1' is shorter and rotatably mounted on the eccentric connector 4', so as to rotate around a vertical axis X', through a lock ring 16.
  • shaft 3' has internal radial projections 3a' that engage the horizontal arm of an inverted-T joint 10', in the vertical leg of said joint 10' there being secured a vertical rod 9' that passes through connector 4' and carries at the top a gear 7' which engages the toothed crown 8'.
  • a ring 17 of low-friction material is preferably interposed between the lock ring 16 and a top peripheral flange 3b' of shaft 3'.
  • the operation of the second embodiment of the sprinkling assembly according to the present invention is substantially the same as the above-described operation of the first embodiment.
  • Sprinkler 1' is supplied with water coming from the wash pump through the supply duct 14 ending with socket 2', said water passing in the hollow body of the eccentric connector 4' through inlet 5a' and outlet 6a' prior to reaching shaft 3'.
  • the water jets emitted by nozzles 1a' and 1b' cause the rotation around axis X' of sprinkler 1' and therefore also of rod 9' due to the drawing of joint 10' performed by the radial projections 3a', which rod 9' carries gear 7' that engages the toothed crown 8' secured on socket 2'.
  • the third embodiment illustrated in Fig.8 is a variant of the second embodiment from which it differs in the type of mounting of the eccentric connector 4' on socket 2', which in this case is not achieved through an external ring nut 15 but through a hollow shaft 19 provided with side openings 19a and a closed bottom 19b. More specifically, shaft 19 is inserted through connector 4' so that its top projects from the water inlet 5a' in order to internally engage socket 2', while the side openings 19a allow the passage of water and the closed bottom 19b abuts on connector 4' thus closing the hole through which shaft 19 is inserted.
  • toothed crown 8' is formed on the internal perimeter of a ring 18 preferably formed in a single piece with socket 2' and the supply duct 14, while the rest of the structure of the sprinkling assembly is unchanged with respect to the second embodiment.
  • sprinkler 1' is still mounted on connector 4' through ring 16, and gear 7' is moved by the kinematic chain made up of rod 9' mounted on joint 10' which is driven into rotation by projections 3a' of shaft 3' that is integral with sprinkler 1'.
  • the transmission ratio 10:1 illustrated in the figures can be freely changed according to the desired rotational speed of sprinkler 1, 1' around axis Y, Y', for example in a range from 5:1 to 20:1.
  • the toothed crown 8, 8' could be formed on the external perimeter of ring 11 or 15a/18 respectively.
  • shaft 3, 3' could be formed directly on sprinkler 1, 1' or gear 7, 7' and rod 9, 9' could be obtained as a single monolithic body.
  • the rotation axes X, X' and Y, Y' could be not exactly parallel as long as the alignment is maintained between axis X, X' and rod 9, 9' and the latter is perpendicular to the plane of the toothed crown 8, 8'.

Landscapes

  • Washing And Drying Of Tableware (AREA)
EP14425005.7A 2014-01-28 2014-01-28 Drehende Sprüheinrichtung für Geschirrspülmaschine Withdrawn EP2898810A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14425005.7A EP2898810A1 (de) 2014-01-28 2014-01-28 Drehende Sprüheinrichtung für Geschirrspülmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14425005.7A EP2898810A1 (de) 2014-01-28 2014-01-28 Drehende Sprüheinrichtung für Geschirrspülmaschine

Publications (1)

Publication Number Publication Date
EP2898810A1 true EP2898810A1 (de) 2015-07-29

Family

ID=50345975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14425005.7A Withdrawn EP2898810A1 (de) 2014-01-28 2014-01-28 Drehende Sprüheinrichtung für Geschirrspülmaschine

Country Status (1)

Country Link
EP (1) EP2898810A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106264399A (zh) * 2016-09-09 2017-01-04 佛山市顺德区美的洗涤电器制造有限公司 喷臂装置及用水家用电器
US20170354312A1 (en) * 2016-06-10 2017-12-14 Lg Electronics Inc. Dishwasher
WO2018045807A1 (zh) * 2016-09-09 2018-03-15 佛山市顺德区美的洗涤电器制造有限公司 喷臂装置及用水家用电器
EP3403564A1 (de) * 2017-05-16 2018-11-21 Gorenje d.d. Sprüheranordnung für einen geschirrspüler
WO2020036558A3 (en) * 2018-08-13 2020-05-28 Arcelik Anonim Sirketi A dishwasher with improved washing performance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1263057B (it) 1993-02-03 1996-07-24 Smeg Spa Gruppo irroratore girevole per macchina lavastoviglie
EP1882435A1 (de) * 2006-07-24 2008-01-30 Electrolux Home Products Corporation N.V. Drehende Sprüheinrichtung
EP2612585A1 (de) * 2012-01-06 2013-07-10 Samsung Electronics Co., Ltd. Düsenanordnung und Geschirrspüler damit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1263057B (it) 1993-02-03 1996-07-24 Smeg Spa Gruppo irroratore girevole per macchina lavastoviglie
EP1882435A1 (de) * 2006-07-24 2008-01-30 Electrolux Home Products Corporation N.V. Drehende Sprüheinrichtung
EP2612585A1 (de) * 2012-01-06 2013-07-10 Samsung Electronics Co., Ltd. Düsenanordnung und Geschirrspüler damit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170354312A1 (en) * 2016-06-10 2017-12-14 Lg Electronics Inc. Dishwasher
US10660499B2 (en) * 2016-06-10 2020-05-26 Lg Electronics Inc. Dishwasher
CN106264399A (zh) * 2016-09-09 2017-01-04 佛山市顺德区美的洗涤电器制造有限公司 喷臂装置及用水家用电器
WO2018045807A1 (zh) * 2016-09-09 2018-03-15 佛山市顺德区美的洗涤电器制造有限公司 喷臂装置及用水家用电器
CN106264399B (zh) * 2016-09-09 2019-07-26 佛山市顺德区美的洗涤电器制造有限公司 喷臂装置及用水家用电器
EP3403564A1 (de) * 2017-05-16 2018-11-21 Gorenje d.d. Sprüheranordnung für einen geschirrspüler
WO2020036558A3 (en) * 2018-08-13 2020-05-28 Arcelik Anonim Sirketi A dishwasher with improved washing performance

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