EP3970593B1 - Ensemble bras gicleur pour lave-vaisselle - Google Patents

Ensemble bras gicleur pour lave-vaisselle Download PDF

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Publication number
EP3970593B1
EP3970593B1 EP20197237.9A EP20197237A EP3970593B1 EP 3970593 B1 EP3970593 B1 EP 3970593B1 EP 20197237 A EP20197237 A EP 20197237A EP 3970593 B1 EP3970593 B1 EP 3970593B1
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EP
European Patent Office
Prior art keywords
spray
arm
examples
dishwashing machine
linkage
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
EP20197237.9A
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German (de)
English (en)
Other versions
EP3970593A1 (fr
Inventor
Hamdullah Cihangir TOPAÇ
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.)
Vestel Elektronik Sanayi ve Ticaret AS
Original Assignee
Vestel Elektronik Sanayi ve Ticaret AS
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Application filed by Vestel Elektronik Sanayi ve Ticaret AS filed Critical Vestel Elektronik Sanayi ve Ticaret AS
Priority to EP20197237.9A priority Critical patent/EP3970593B1/fr
Publication of EP3970593A1 publication Critical patent/EP3970593A1/fr
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Publication of EP3970593B1 publication Critical patent/EP3970593B1/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
    • A47L15/42—Details
    • A47L15/4278—Nozzles
    • A47L15/4282—Arrangements to change or modify spray pattern or direction
    • 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

Definitions

  • the present disclosure relates to a spray-arm assembly for a dishwashing machine and a dishwashing machine comprising the spray-arm assembly.
  • Dishwashing machines are used for washing items such as crockery and cutlery.
  • a known dishwashing machine comprises a washing compartment for holding one or more items to be washed, and a washing mechanism for washing those items.
  • a user can select from a plurality of pre-defined washing cycles via a user interface on a front face of the dishwashing machine.
  • WO2017/211393A1 discloses a spray arm for a dishwashing machine.
  • the spray arm comprises a shape memory alloy which provides an articulated joint along the spray arm.
  • the shape memory alloy changes shape dependent on temperature so as to cause the spray arm to bend as the dishwasher heats up.
  • a spray-arm apparatus for a dishwashing machine comprising: a spray-arm having a plurality of outlets for spraying liquid during a washing cycle, the plurality of outlets arranged along a length of the spray-arm between a rotational centre of the spray-arm and a distal end of the spray-arm; and a device for selectively causing a force to be applied to the spray-arm, so as to cause at least a portion of the spray arm to deflect, at least one of the plurality of outlets being located on the portion.
  • the device is constructed and arranged so that the applied force is dependent upon a rotational speed of the spray-arm.
  • the device is constructed and arranged so that the applied force increases as the rotational speed increases.
  • the spray arm apparatus is in communication with a controller, the controller arranged to control the rotational speed.
  • the controller is arranged to vary the rotational speed of the spray-arm during the washing cycle.
  • the controller is arranged so that during the washing cycle the rotational speed is varied according to one or more of: a square wave pattern; a trapezoidal wave pattern; a ladder-type wave pattern; a sinusoidal wave pattern.
  • the device comprises a linkage constructed and arranged to apply the force to the spray-arm, the linkage attached to the spray-arm at a first end of the linkage and attached to the device at a second end of the linkage.
  • the actuator mechanism comprises a tethered weight constructed and arranged to move under centrifugal force towards the distal end of the spray-arm as the spray-arm rotates.
  • the actuator mechanism is constructed and arranged so that the movement of the tethered weight causes movement of the linkage via a piston and cam assembly.
  • the weight is tethered by a spring, the spring constructed and arranged to bias the weight towards the rotational centre of the spray-arm.
  • the spray arm comprises an articulated joint between the rotational centre of the spray-arm and the distal end of the spray arm, at least one of the outlets being positioned between the distal end and the articulated joint.
  • a dishwashing machine comprising the spray-arm apparatus according to the first aspect.
  • Dishwashing machines are used to automate the washing of items including crockery such as plates, bowls, cups, mugs etc. Items to be cleaned may also include cutlery such as knives, forks, spoons, or indeed any other cooking or eating utensil. Other items that may be washed include glassware, food containers etc.
  • the spray arm 124 is connected to shaft 125.
  • the shaft 125 enables rotation of spray arm 124 about a central axis of the shaft 125.
  • the shaft 125 and spray arm 124 may be considered to be comprised in a spray arm assembly 121.
  • the spray arm 126 is connected to shaft 127.
  • the shaft 127 enables rotation of spray arm 126 about a central axis of the shaft 127.
  • the shaft 127 and spray arm 126 may be considered to be comprised in a spray arm assembly 129.
  • the dishwashing machine 100 further comprises water inlet schematically shown at 128 and water outlet schematically shown at 130, for enabling water to be fed into and taken out of the dishwashing machine respectively.
  • a heater element (not shown) is provided for heating water as necessary.
  • hot and cold water is drawn from a building's supply as required.
  • a power connection is schematically shown at 132, which enables the dishwashing machine to be connected to mains electrical power for powering the dishwashing machine.
  • a water pump is schematically shown at 150.
  • the water pump 150 is constructed and arranged to distribute water around the dishwashing machine 100.
  • the water pump 150 can pump water to spray arms 124 and 126. Water that has been sprayed falls back down to a base or sump 152 of the dishwashing machine 100, from where that water can be recycled (after filtering, in some examples) by the pump 150.
  • rotation of the spray arms 124 and 126 is caused by the force of liquid being ejected from outlets of the spray arms. Additionally or alternatively, one or more motors, shown schematically at 148 may be provided for powering rotation of the spray arms 124 and 126.
  • a washing cycle generally comprises three main stages: (i) wetting; (ii) injection of detergent, (iii) rinsing. In some examples one or more of these steps may be omitted.
  • a rinse wash may include just a rinsing cycle. Whichever steps are included or not included, the washing of the washing load may be generally termed a washing cycle.
  • FIG. 2 is a schematic plan-view of a dishwashing machine 200 according to an example.
  • a washing compartment is shown at 204.
  • the washing compartment is generally square or rectangular in plan view.
  • a spray arm or spray propeller is shown at 226 (and various positions of the spray arm 226 are shown in phantom).
  • distal ends 276 of the spray-arm 226 trace a circular path within square washing compartment 204.
  • Blind spots may also occur in an unpredictable manner, for example where a large plate blocks a smaller plate.
  • the present disclosure relates to a spray-arm apparatus in which liquid outlet(s) of the spray-arm can be selectively oriented or angled to spray liquid (such as water and/or washing liquor) into the blind-spots of a washing compartment.
  • liquid such as water and/or washing liquor
  • some examples of the spray-arm apparatus comprise a mechanical system or device that is arranged to actuate under the centrifugal force of rotation of the spray-arm. This causes at least a portion of the spray-arm to deflect, and consequently alters a spray angle of one or more liquid outlets. Motion and operation of the spray-arm is, in some examples, controlled using electronic motion control.
  • FIG. 3 shows a spray-arm apparatus 329 according to an example.
  • the spray-arm apparatus 329 is, in this example, an upper spray-arm which is arranged to spray liquid downwardly within a dishwashing machine.
  • the concept is equally applicable to lower spray-arms that are arranged to spray upwardly within a washing compartment.
  • the device is constructed and arranged so that the force that is applied to the spray arm 326 is dependent on a rotational speed of the spray-arm 326. In some examples, the device 376 is constructed and arranged so that the applied force increases as the rotational speed increases. In examples, the greater the applied force the greater the angle of deflection of the portion 398.
  • the device comprises a linkage 380 that is attached to the spray-arm 326 in order to transfer or apply the force to the spray-arm 326 from the device 378.
  • the linkage 380 is attached to the spray-arm 326 at a first end 381 of the linkage and is attached to the device 378 at a second end 383 of the linkage 380.
  • the first end of the linkage 380 is attached to the distal end 376 of the spray-arm 326.
  • the linkage 380 comprises a rope or cable or wire or the like.
  • the weight 388 when weight 388 moves outwardly due to the centrifugal force of the spray-arm 326 rotating, the weight 388 pushes on piston 384 which causes cam 382 to rotate. This causes the linkage 380 to move and in turn lifts the end or tip of the spray-arm 326. As shown, this causes outlet 372 to be angled which increases the overall spray area of the spray-arm 326.
  • the weight 388 comprises a metal ball.
  • the weight 388 may comprise an iron ball.
  • the weight 388 is tethered to the device 378 by a spring 390.
  • spring 390 may comprise a helical spring.
  • the spring 390 is biased to draw or move the weight 388 back towards the rotational centre 374 of the spray-arm 326, for example as the spray-arm 326 slows down or stops moving. In-turn, and with respect to the example of Figure 3 , this will cause linkage 380 and outlet 372 to move, so that the deflection of portion 398 is decreased.
  • a rest-position of the portion 398 is horizontal or in-line with the rest of spray-arm 326.
  • outlet 372 is oriented vertically or substantially vertically e.g.
  • the piston 384 and/or cam 382 may in some examples be biased to orient the portion 398 to its rest position. Of course, once the spray-arm 326 is moving this biasing force may be overcome by the actuator 379. In some examples, no biasing element is provided for returning the portion 398 to its rest position, and it is instead allowed to return to its rest position under the force of gravity.
  • the spray arm 326 comprises an articulated joint 392 between the rotational centre 374 of the spray-arm and the distal end 376 of the spray arm.
  • the articulated joint 392 comprises a hinge.
  • the hinge comprises a living hinge.
  • the hinge comprises a butt hinge.
  • at least one outlet is positioned between the distal end 376 of the spray arm 326 and the articulated joint 392.
  • a single outlet 372 is positioned between the articulated joint 392 and the distal end 376.
  • portion 398 comprises a portion of the spray-arm 326 between articulated joint 392 and distal end 376.
  • the spray arm 326 is formed of a material that is flexible enough so that the articulated joint 392 is not required.
  • actuator 379 may take forms that differ to that shown in Figure 3 .
  • an electrically powered actuator may be provided that provides the force to be applied to the spray-arm, rather than the mechanical arrangement of Figure 3 .
  • the device 378 comprises an actuator 379 for applying force to the spray arm to alter an angle of liquid trajectory from one or more of the outlets.
  • the spray-arm apparatus 329 has been described with respect to the right-hand side of Figure 3 . It will be understood that in examples the left-hand side of the apparatus 329 may operate in the same or a similar way.
  • the spray-arm apparatus 329 is in communication with a controller 334.
  • controller 334 is a controller of a dishwashing machine in which the spray-arm apparatus 329 is located.
  • the controller 334 is arranged to control the rotational speed of the spray-arm 326, for example by controlling a speed of motor 348.
  • the motor 348 comprises a brushless direct current (BLDC) motor.
  • the controller is arranged to vary the rotational speed of the spray-arm 326 during a washing cycle. This varies the spray trajectory of the spray-arm 326 during a washing cycle by varying the deflection of the spray-arm. This increases spray coverage during a washing cycle, and helps to eliminate blind-spots.
  • Figure 4 shows an example pattern by which the controller 334 may drive spray-arm 326.
  • Speed of the spray-arm is shown on the y-axis and time is shown on the x-axis.
  • time T represents one full revolution of the spray-arm 326.
  • the pattern in Figure 4 is a square pattern. For one revolution the spray-arm 326 is driven at a speed slower than a nominal speed (in this example 0.8*nominal speed), and for a subsequent revolution is driven at a speed higher than the nominal speed (in this example 1.2*nominal speed), and so on.
  • the spray-arm 326 may be driven according to a different pattern.
  • Such patterns may include: a trapezoidal wave pattern; a ladder-type wave pattern; a sinusoidal wave pattern.
  • the controller is arranged to use an algorithm for controlling movement of the spray-arm 326.
  • the algorithm comprises a look-up table (LUT).
  • the LUT contains spring constant k, angular velocity w of the spray arm 326, and mass m of the weight 388.
  • the spray arm apparatus 329 is comprised in a dishwashing machine.
  • the spray-arm apparatus 329 may be comprised in dishwashing machine 100 or the like.
  • the spray-arm apparatus 329 may be an upper spray-arm apparatus or a lower spray-arm apparatus.
  • the outlets 364, 366, 368, 370 and 372 point downwardly. It will be understood that the disclosed concept can also be applied to a spray-arm apparatus where the liquid outlets point upwardly.
  • the disclosed spray-arm apparatus and dishwashing machine provides effective water spraying from the spray-arm to a washing compartment of a dishwashing machine. It will also be appreciated that in examples the spray-arm apparatus can be implemented using simple mechanical parts, with no or minimal addition of electronics. The spray-arm apparatus can be controlled using standard items of a dishwashing machine e.g. controller and motor.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (13)

  1. Appareil de bras gicleur (329) destiné à une machine à laver la vaisselle (100), comprenant :
    un bras-gicleur (326) ayant une pluralité de sorties (364, 366, 368, 370, 372) servant à pulvériser du liquide pendant un cycle de lavage, la pluralité de sorties (364, 366, 368, 370, 372) étant agencée le long d'une longueur du bras gicleur (326) entre un centre de rotation (374) du bras gicleur (326) et une extrémité distale (376) du bras gicleur (326) ;
    un dispositif (378) servant à provoquer de manière sélective l'application d'une force au bras gicleur (326) de manière à provoquer la déviation d'au moins une portion (398) du bras gicleur (326), au moins une sortie parmi la pluralité de sorties (364, 366, 368, 370, 372) étant située sur la portion (398),
    et caractérisé en ce que le dispositif (378) est construit et agencé de sorte que la force appliquée est fonction d'une vitesse de rotation du bras gicleur (326).
  2. Appareil de bras gicleur (329) selon la revendication 1, dans lequel le dispositif (378) est construit et agencé de sorte que la force appliquée augmente lorsque la vitesse de rotation augmente.
  3. Appareil de bras gicleur (329) selon la revendication 1 ou 2, dans lequel l'appareil de bras gicleur (329) est en communication avec un contrôleur (134), le contrôleur (134) étant agencé pour contrôler la vitesse de rotation.
  4. Appareil de bras gicleur (329) selon la revendication 3, dans lequel le contrôleur (134) est agencé pour faire varier la vitesse de rotation du bras gicleur (326) pendant le cycle de lavage.
  5. Appareil de bras gicleur (329) selon la revendication 4, dans lequel le contrôleur (134) est agencé de sorte que, pendant le cycle de lavage, la vitesse de rotation varie selon l'un ou plusieurs des motifs suivants : un motif d'onde carrée ; un motif d'onde trapézoïdale ; un motif d'onde de type échelle ; un motif d'onde sinusoïdale.
  6. Appareil de bras gicleur (329) selon l'une quelconque des revendications 1 à 5, dans lequel le dispositif (378) comprend une tringlerie (380) construite et agencée pour appliquer la force au bras gicleur (326), la tringlerie (380) étant fixée au bras gicleur (326) au niveau d'une première extrémité (381) de la tringlerie (380) et étant fixée au dispositif (378) au niveau d'une deuxième extrémité (383) de la tringlerie (380).
  7. Appareil de bras gicleur (329) selon la revendication 6, dans lequel le dispositif (378) comprend un mécanisme d'actionnement (379) construit et agencé pour déplacer la tringlerie (380).
  8. Appareil de bras gicleur (329) selon la revendication 7, dans lequel le mécanisme d'actionnement (379) comprend un poids attaché (388) qui est construit et agencé pour se déplacer sous l'effet de la force centrifuge vers l'extrémité distale (376) du bras gicleur (326) lorsque le bras gicleur tourne.
  9. Appareil de bras gicleur (329) selon la revendication 8, dans lequel le mécanisme d'actionnement (379) est construit et agencé de sorte que le mouvement du poids attaché (388) provoque le mouvement de la tringlerie (380) par l'intermédiaire d'un ensemble piston et came.
  10. Appareil de bras gicleur (329) selon la revendication 8 ou 9, dans lequel le poids (388) est attaché par un ressort (390), le ressort (390) étant construit et agencé pour solliciter le poids vers le centre de rotation du bras gicleur (326).
  11. Appareil de bras gicleur (329) selon l'une quelconque des revendications 1 à 10, dans lequel le bras gicleur (326) comprend un joint articulé (392) entre le centre de rotation (374) du bras gicleur (326) et l'extrémité distale (376) du bras gicleur (326), au moins une sortie parmi la pluralité de sorties (364, 366, 368, 370, 372) étant positionnée entre l'extrémité distale (376) et e joint articulé (392).
  12. Machine à laver la vaisselle (100) comprenant l'appareil de bras gicleur (329) selon l'une quelconque des revendications 1 à 11.
  13. Machine à laver la vaisselle (100) selon la revendication 12, dans laquelle l'appareil de bras gicleur (329) est situé dans une portion ou les deux portions parmi une portion supérieure (108) de la machine à laver la vaisselle (100) et une portion inférieure (106) de la machine à laver la vaisselle (100).
EP20197237.9A 2020-09-21 2020-09-21 Ensemble bras gicleur pour lave-vaisselle Active EP3970593B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20197237.9A EP3970593B1 (fr) 2020-09-21 2020-09-21 Ensemble bras gicleur pour lave-vaisselle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20197237.9A EP3970593B1 (fr) 2020-09-21 2020-09-21 Ensemble bras gicleur pour lave-vaisselle

Publications (2)

Publication Number Publication Date
EP3970593A1 EP3970593A1 (fr) 2022-03-23
EP3970593B1 true EP3970593B1 (fr) 2023-08-23

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EP20197237.9A Active EP3970593B1 (fr) 2020-09-21 2020-09-21 Ensemble bras gicleur pour lave-vaisselle

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0122507Y1 (ko) * 1996-06-14 1998-08-17 배순훈 식기세척기의 세척수분사장치
CN105832267B (zh) * 2015-02-02 2019-11-12 Lg电子株式会社 洗碗机
CN105286752B (zh) * 2015-11-20 2018-10-26 佛山市顺德区美的洗涤电器制造有限公司 用于洗碗机的喷臂组件及具有其的洗碗机
WO2017211393A1 (fr) * 2016-06-07 2017-12-14 Arcelik Anonim Sirketi Moyen de pulvérisation amélioré destiné à être utilisé dans un lave-vaisselle
WO2018228679A1 (fr) * 2017-06-14 2018-12-20 Haier Deutschland GmbH Lave-vaisselle et procédé de fonctionnement d'un lave-vaisselle

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