EP3843604B1 - A dishwasher having improved washing performance - Google Patents

A dishwasher having improved washing performance Download PDF

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Publication number
EP3843604B1
EP3843604B1 EP19739528.8A EP19739528A EP3843604B1 EP 3843604 B1 EP3843604 B1 EP 3843604B1 EP 19739528 A EP19739528 A EP 19739528A EP 3843604 B1 EP3843604 B1 EP 3843604B1
Authority
EP
European Patent Office
Prior art keywords
gear
spray arm
actuator
dishwasher
tub
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.)
Active
Application number
EP19739528.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3843604A1 (en
Inventor
Resul KARTAL
Ahmet Hamit YILMAZ
Emre AYAROGLU
Ozan ULE
Osman Gokhan Ersoy
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 AS filed Critical Arcelik AS
Priority to SI201930657T priority Critical patent/SI3843604T1/sl
Publication of EP3843604A1 publication Critical patent/EP3843604A1/en
Application granted granted Critical
Publication of EP3843604B1 publication Critical patent/EP3843604B1/en
Active 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
    • A47L15/14—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 dishwasher, in particular to a dishwasher having an actuator and a spray arm rotatable attached to the actuator so as to improve the washing performance of the dishwasher.
  • the items placed on to the dishwasher drawers close or on to the corner regions of a tub may not be cleaned well due to the washing tubs generally having a rectangular cross-section and the pivoting spray arms forming an annular washing area.
  • multiple spraying arms rotating on different axes and heights relative to the bottom of the tub are known as a solution to overcome this problem.
  • multiple nozzles are provided on the spray arm so as to eject the water thereby rotating the spray arm.
  • the actuator rotates on the base of the tub and pivots around an axis, created by the momentum of water sprayed through the nozzles provided on the spray arm.
  • the spray arm rotates about another axis offset from the axis of the actuator. By this, the end of the spray arm extends farther to the corner regions, enabling better cleaning of the items near the corner regions.
  • the spray arm and the actuator are coupled to each other via a plurality of gears so as to rotate them during washing and rinsing.
  • the gears that are exposed to the washing water inside the tub may malfunction due to food particles getting stuck in between the wheels of the gears. This necessitates protection of gears from the outer conditions.
  • a spray arm device for a dishwasher which comprises: a spray arm holder; a sun gear provided at a water outlet of the spray arm holder wherein the relative position of the sun gear and the spray arm holder are fixed; a planetary gear being in a drive connection with the sun gear via a transmission gear; a carrier with the sun gear, the transmission gear, and the planetary gear being rotatably disposed under the carrier, wherein the spray arm body is fixedly connected with the planetary gear, and the spray arm body is provided with an injection hole communicating with the spray arm holder.
  • An objective of the present invention is to rotate the agitator and the spray arm about different axes so as to clean the dishes near corner regions and more importantly eliminating the possibility of food particles getting in between the wheels of the gear.
  • the dishwasher realized to achieve the aim of the present invention is defined in the independent claim.
  • Preferred embodiments of this dishwasher are defined in the dependent claims.
  • An embodiment comprises a dishwasher having a body, having a tub wherein washing, rinsing and drying operations take place.
  • An actuator is rotatable attached to the bottom of the tub around a stationary axis via a base gear.
  • the base gear is connected to a water conduit transferring water inside the tub via a pump that is used to pressurize the water.
  • a spray arm is attached to the actuator and rotates about a moving vertical axis offset from the stationary axis, thereby the spray arm extends farther to the corner regions of the tub, enabling better cleaning of the dishes near the corner regions.
  • the spray arm is in fluid communication with the actuator, so that the water pumped inside the actuator passes through the actuator, spray arm and nozzles of the spray arm respectively.
  • the spray arm gear and the base gear are connected to each other via at least an intermediary gear.
  • the intermediary gear provides the rotation of the base gear which in turn rotates the actuator.
  • the intermediary gear is located inside a gear room isolated from the rest of the actuator and the tub.
  • the spray arm gear and the base gear are partially located inside the gear room so as to rotatable couple with the intermediary gear.
  • the gear room is insulated from the rest of the dishwasher in a waterproof manner.
  • the gear room is in the shape of a ring.
  • the base gear is located off the center of the gear room. Due to asymmetrical location of the base gear inside the gear room and also the actuator, spray arm rotates in a Reuleaux triangle reaching the corners of the tub and cleaning the dishes in an effective way.
  • the gear room is a circular waterproof chamber around the base gear with one side being wider wherein the intermediary gear and the spray arm gear is located.
  • the spray arm gears forms a protrusion protruding upwards from a hole provided on the gear room.
  • the wheels of the spray arm gear and the base gear are located inside the gear room.
  • the spray arm gear has at least one lug protruding towards the spray arm embodiment of the invention and extending through an opening provided on the actuator.
  • the lugs are originated from the spray arm gear and are in the shape of a rectangular prism.
  • the lugs and the spray arm gear are produced in one piece. By use of the lugs, the spray arm is fitted on to the spray arm gear robustly.
  • the central gear is connected to the spray arm gear via a plurality of intermediary gears.
  • the total number of gears, including the central gear and the spray arm gear, must be an odd number so as to rotate the spray arm in the opposite direction with respect to the actuator.
  • the base gear is produced so as not to move with respect to the actuator.
  • the spray arm gear starts to rotate with the same direction of the spray arm.
  • the Intermediary gear rotates in opposite direction and starts to turn around the base gear forcing the actuator to rotate in a direction opposite to the spray arm. Therefore, the corners of the tub are sprayed effectively with water and cleaning agent sprayed through the spray arm.
  • the spray arm is configured to be attached on to the spray arm gear in a specific click-fit orientation so as to provide a robust assembly.
  • a major advantageous effect of the invention is that the gears are isolated from the washing water thereby clogging of food particles inside the wheels of the gears is prevented.
  • Another advantageous effect of the invention is that the agitation of the water and detergent mix by the gears is minimized thereby resulting in foaming at a reasonable level.
  • the present invention relates to a dishwasher (1) comprising; a body (2), a tub (3) inside the body (2) wherein the washing operation takes place, an actuator (4) rotatable attached to the bottom of the tub (3) around a stationary axis via a base gear (5) having a hollow center to transfer water delivered from a water inlet (6) inside the actuator (4), a spray arm (7) in fluid communication with the actuator (4) so as to spray the dishes with water, and wherein the spray arm (7) is rotatable placed on to the actuator (4) around a moving vertical axis via a spray arm gear (8), which upon rotation, rotates around the stationary vertical axis in a circular trajectory.
  • the present invention relates to a dishwasher (1) comprising; the actuator (4) comprising a gear room (9) having an inner volume separated from the inner volume of the actuator (4) wherein at least an intermediary gear (10) is placed and wherein the intermediary gear (10) connects the spray arm gear (8) and the base gear (5) to provide power transmission.
  • the actuator (4) is rotatable attached to the bottom of the tub (3).
  • the base gear (5) is formed in the shape of a hollow cylindrical tube having a hollow center and is connected to the water inlet (6) to transfer water inside the tub (3) for washing and rinsing operations.
  • the actuator (4) comprises the spray arm gear (8) which is used to rotatable connect the actuator (4) to the spray arm (7).
  • the water is pumped through the water inlet (6), the base gear (5), the spray arm gear (8) and the spray arm (7) respectively.
  • Nozzles provided along the spray arm (7) ejects the water towards the dishes and starts to rotate the spray arm (7) around the moving vertical axis.
  • This rotation is transferred via the spray arm gear (8) to the intermediary gear (10).
  • the actuator (4) starts to rotate around the stationary vertical axis.
  • the parts of the base gear (5) and spray arm gear (8) interacting with the intermediary gear (10) and the intermediary gear (10) are located inside the gear room (9).
  • the intermediary gear (10) and corresponding parts of the base gear (5) and spray arm gear (8) is isolated from the inside of the dishwasher (1) preventing particles of food to get in between the gears. Therefore, malfunctions caused by jamming of gears is prevented.
  • Another advantageous effect of the present invention is that the number of revolutions of the spray arm (7) is fixed prolonging the use of the spray arm (7) and therefore that of the dishwasher (1).
  • the gear room (9) is insulated from the actuator (4) and the tub (3) in a waterproof manner via a plurality of seals.
  • the gear room (9) is insulated from the actuator (4) and the tub (3) in a waterproof manner via a plurality of seals.
  • the gear room (9) is in the form of a ring having an off-center bore with the base gear (5) passing through the gear room (9).
  • the base gear (5) is located off the center of the gear room (9) meaning that the rotational centers of the actuator (4) and the spray arm (7) do not coincide. This way it is ensured that the spray arm (7) reaches the corners of the tub (3) and clean the dishes in an effective way.
  • wheels of the base gear (5) reaches inside the gear room (9) and are coupled with the intermediary gear (10).
  • the spray arm gear (8) is at least partly inside the gear room (9) and is coupled with the intermediary gear (10).
  • the spray arm gear (8) protrudes upwards towards the spray arm (7) via the hole provided on the gear room (9) and through the rest of the actuator (4) in a waterproof manner.
  • the spray arm gear (8) has at least a lug (11) protruding towards the spray arm (7) by extending along and radially outward from the moving vertical axis to connect the actuator (4) form fittingly upon placement of the spray arm (7) on to the spray arm gear (8).
  • Multiple lugs (11) are formed extending along and radially outward from the moving vertical axis and are formed in the shape of a rectangular prism, first longitudinal face being attached to the spray arm gear (10) and second neighboring longitudinal face being connected to the second neighboring longitudinal face of an adjacent lug (11) along the moving vertical axis.
  • Multiple lugs (11) are connected symmetrically around the moving vertical axis forming congruent angles in between.
  • the angle formed between two lugs (11), three lugs (11) or four lugs (11) are, 180 degrees, 120 degrees and 90 degrees respectively.
  • the water entering the actuator (4) is transferred between the adjacent lugs (11) towards the spray arm (7). Therefore, a means to transfer the water towards the spray arm (7) is achieved that will not be clogged by the particles of food inside the water.
  • the spray arm gear (8) is coupled to the base gear (5) via an odd number of intermediary gears (10).
  • Use of odd number of gears, including the spray arm gear (8) and the base gear (5), ensures that the spray arm (7) and the actuator (4) rotates in opposite directions.
  • the corners of the tub (3) are sprayed with water mixed with cleaning agent, thereby improving cleaning capacity and quality of the dishwasher (1).
  • Another advantageous effect of using the intermediary gear (10) is that the number of rotations of the spray arm gear (8) can be adjusted by using a double layer gear as the intermediary gear (10). Therefore, higher number of rotations per unit time can be achieved, increasing the cleaning capacity of the dishwasher (1).
  • the spray arm (6) is configured to be engaged and mounted on to the spray arm gear (8) in a specific click-fit orientation.
  • the spray arm (7) is rotating with a high angular velocity to ensure effective cleaning of the dishes.
  • the connection between the spray arm (7) and the spray arm gear (8) is in the form of a click-fit orientation which is resistant to disengagement of the spray arm (7) from the spray arm gear (8). Click-fit connection also guides the user during assembly and disassembly making the dishwasher (1) easier to clean and maintain.
  • a dishwasher having an actuator (4) rotatable attached to the bottom of the tub (3) wherein the actuator (4) comprises a gear room (9) separating an intermediary gear (10) and the connection between the intermediary gear (10) and the base gear (5) and the spray arm gear (8) from the tub (3) in a waterproof manner, is provided. Therefore, a longer lifetime for the actuator (4) is achieved.

Landscapes

  • Washing And Drying Of Tableware (AREA)
EP19739528.8A 2018-08-31 2019-06-28 A dishwasher having improved washing performance Active EP3843604B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201930657T SI3843604T1 (sl) 2018-08-31 2019-06-28 Pomivalni stroj z izboljšano učinkovitostjo pomivanja

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201812456 2018-08-31
PCT/EP2019/067421 WO2020043354A1 (en) 2018-08-31 2019-06-28 A dishwasher having improved washing performance

Publications (2)

Publication Number Publication Date
EP3843604A1 EP3843604A1 (en) 2021-07-07
EP3843604B1 true EP3843604B1 (en) 2023-08-02

Family

ID=67262274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19739528.8A Active EP3843604B1 (en) 2018-08-31 2019-06-28 A dishwasher having improved washing performance

Country Status (4)

Country Link
EP (1) EP3843604B1 (pl)
PL (1) PL3843604T3 (pl)
SI (1) SI3843604T1 (pl)
WO (1) WO2020043354A1 (pl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4186407B1 (en) 2021-11-25 2024-05-29 HAIER Germany GmbH Liquid sprayer for a dishwasher and dishwasher

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113854924A (zh) * 2021-11-18 2021-12-31 杭州老板电器股份有限公司 喷淋装置及洗碗机

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5464482A (en) 1994-11-07 1995-11-07 Maytag Corporation Washarm assembly for dishwasher
US5579789A (en) * 1995-01-04 1996-12-03 Whirlpool Corporation Food soil handling system for a dishwasher
IT1317138B1 (it) * 2000-03-08 2003-05-27 Bonferraro Spa Gruppo irroratore girevole per lavastoviglie dotato di dispositivo per lo spostamento orizzontale
EP2233057A1 (en) * 2009-03-23 2010-09-29 Bonferraro S.p.A. Dishwasher with improved drying system and relevant operating cycle
CN104284620B (zh) * 2012-03-08 2017-06-13 比特朗股份公司 应用于洗涤机和/或干燥机的洗涤组件
US10667668B2 (en) * 2013-06-27 2020-06-02 Whirlpool Corporation Dishwasher with rotationally mounted sprayer
US9635994B2 (en) * 2014-06-13 2017-05-02 Haier Us Appliance Solutions, Inc. Spray arm assembly for dishwasher appliance
CN107028572B (zh) * 2016-12-13 2023-08-29 佛山市顺德区美的洗涤电器制造有限公司 用于洗碗机的喷臂装置及具有其的洗碗机

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4186407B1 (en) 2021-11-25 2024-05-29 HAIER Germany GmbH Liquid sprayer for a dishwasher and dishwasher

Also Published As

Publication number Publication date
PL3843604T3 (pl) 2024-04-08
EP3843604A1 (en) 2021-07-07
SI3843604T1 (sl) 2023-12-29
WO2020043354A1 (en) 2020-03-05

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