EP3718458B1 - Bras pulvérisateur pour un lave-vaisselle - Google Patents

Bras pulvérisateur pour un lave-vaisselle Download PDF

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Publication number
EP3718458B1
EP3718458B1 EP20167645.9A EP20167645A EP3718458B1 EP 3718458 B1 EP3718458 B1 EP 3718458B1 EP 20167645 A EP20167645 A EP 20167645A EP 3718458 B1 EP3718458 B1 EP 3718458B1
Authority
EP
European Patent Office
Prior art keywords
spray arm
filter
inlet opening
spray
filter insert
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
EP20167645.9A
Other languages
German (de)
English (en)
Other versions
EP3718458A1 (fr
Inventor
Holger Ernst
Dirk Wegener
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Publication of EP3718458A1 publication Critical patent/EP3718458A1/fr
Application granted granted Critical
Publication of EP3718458B1 publication Critical patent/EP3718458B1/fr
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
    • 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
    • A47L15/4202—Water filter means or strainers

Definitions

  • the invention relates to a spray arm for a dishwasher, having an inlet opening for washing liquor, a spray nozzle, a washing liquor channel fluidically connecting the spray nozzle to the inlet opening, and a filter means.
  • Previously known dishwashers have a washing compartment that provides a washing area. This is accessible to the user via a loading opening which can be closed in a fluid-tight manner by means of a pivotably mounted washing compartment door.
  • the washing container is used to hold items to be cleaned, which can be crockery, cutlery and/or the like, for example.
  • a spray device housed in the washing container is used to apply washing liquid, the so-called washing liquor, to the items to be cleaned.
  • This spray device typically provides rotatably mounted spray arms, with two or three such spray arms being provided as a rule.
  • the items to be cleaned are subjected to washing liquor by means of rotating spray arms.
  • a generic spray arm is, for example, from EP 3 016 569 B1 known.
  • the one from the EP 3 016 569 B1 previously known spray arm has an inlet opening for washing liquor. When used as intended, the spray arm is fed with washing liquid via the inlet opening.
  • the spray arm also has a spray nozzle.
  • a plurality of spray nozzles are typically provided. When used as intended, washing liquor is released via this, specifically in the direction of the items to be washed, among other things.
  • the spray arm For the purpose of fluidically connecting the spray nozzle to the inlet opening, the spray arm also provides a washing liquor channel.
  • washing liquor fed to the spray arm flows through the washing liquor channel via the inlet opening, specifically to the spray nozzle, from where the washing liquor is then released in the direction of the dishes to be cleaned.
  • the generic spray arm is after EP 3 016 569 B1 equipped with a filter.
  • This filter means is arranged in the washing liquor channel and is intended to hold back dirt particles or similar impurities carried along by the washing liquor.
  • Known filter means can advantageously minimize the tendency of the spray nozzles provided by the spray arm to become clogged, but when used as intended, the filter means itself can become clogged in a disadvantageous manner, in that the gaps between the webs of the filter means become clogged with dirt particles or similar contaminants . Since the webs are arranged in the wash water channel, ie inside the spray arm, user access is difficult or impossible, which makes cleaning cumbersome and expensive if the filter medium becomes clogged. In addition, the previously known construction does not allow the user to easily check the filter medium for a possible blockage.
  • the WO 2017/171620 A1 discloses a dishwasher with which, on the one hand, conventional cleaning with rinsing liquid can be carried out and, on the other hand, granules can be added to the rinsing liquid for cleaning particularly heavily soiled articles.
  • the spray arm has, on the one hand, rinsing channels with conventionally small-sized spray nozzles and, on the other hand, rinsing channels with spray nozzles that are dimensioned so large that the granules can pass through them.
  • a filter means is provided according to the invention which, when used as intended, is not arranged in the rinsing liquor channel but as a filter insert in the inlet opening upstream of the rinsing liquor channel.
  • the arrangement of the filter insert in the inlet opening has the advantage of easy accessibility. It is therefore easily possible for the user to check the filter insert for dirt and to clean it if necessary.
  • the filter means is not designed to be stationary, but to be replaceable and positionable.
  • the filter insert according to the invention can therefore be removed from the inlet opening by the user if necessary.
  • the filter insert can then be checked and cleaned independently of the spray arm.
  • the replaceable arrangement of the filter insert in the inlet opening increases the ease of use for the user, which improves handling even further.
  • a spray arm which has a removable filter insert, in particular a filter insert that can be removed without tools, which is arranged centrally in the suction area, namely in the inlet opening of the spray arm, when used as intended.
  • the construction according to the invention ensures that the tendency of the spray nozzles of the Spray arm is minimized, and on the other hand, that a possible clogging of the filter insert can be easily controlled by the user and, if necessary, can also be easily eliminated by cleaning.
  • the invention provides an improved cleaning option for the spray arm for the user, since dirt particles or similar contaminants fed to the spray arm via the washing liquor can be separated centrally and easily removed by removing and separately cleaning the filter insert.
  • EP 3 016 569 B1 does not allow this because one filter is provided per branch of the spray arm, i.e. two per spray arm, which are also installed inside the spray arm and are therefore not accessible to the user.
  • a further advantage is that the spray arm rotates more slowly or even stops in the event of the filter insert centrally arranged in the inlet opening becoming clogged. This can be detected via a device for detecting the spray arm speed, which is preferably already provided by the dishwasher, and can be communicated to a user via a corresponding display device on the dishwasher. Any blockages in the spray arm can thus be automatically detected at an early stage and displayed to a user of the dishwasher, so that he or she can take appropriate cleaning measures at an early stage.
  • the filter insert has a filter section and a fastening section formed therewith, preferably formed in one piece therewith.
  • the filter insert is functionally divided into a filter section on the one hand and a fastening section on the other.
  • the filter section serves to remove dirt particles or similar contaminants carried along from the washing liquor.
  • the filter insert is held in a secure position on the spray arm by means of the fastening section, which ensures in particular that washing liquor cannot accidentally get past the filter section and into the washing liquor channel of the spray arm.
  • the fastening section thus ensures that, in the intended use case, washing liquor always flows through the filter section.
  • the fastening section has an annular flange arranged circumferentially on the filter section.
  • the annular flange is formed at an angle to the filter section of the filter insert and comes to lie between two abutments in the final assembled state. In this way, a positionally accurate and positionally secure arrangement of the filter insert in the inlet opening of the spray arm is ensured in a structurally simple manner.
  • an edge section cooperating with the annular flange in the final assembled state is formed on the outside of the inlet opening.
  • This edge section serves as a first abutment for the annular flange, against which first abutment the annular flange rests in the final assembled state.
  • the second abutment for the annular flange is provided, for example, by a socket of a support arm, by which support arm the spray arm is held in the intended use case.
  • the annular flange of the filter insert is thus securely clamped in the final assembled state between the edge section surrounding the inlet opening of the spray arm on the one hand and the socket of the support arm on the dishwasher side on the other hand.
  • a fastener such as a nut, serves to fix the spray arm to the support arm in a manner known per se.
  • This construction provided according to the invention allows the filter insert to be checked for possible contamination and, if necessary, also cleaned in a very simple manner. Because on the user side it is only necessary for dismantling the spray arm to loosen the nut coupling the spray arm to the support arm.
  • the spray arm which is then dismantled, can be removed from the dishwasher by the user and placed, for example, on a work surface in an adjacent kitchen unit. The user can then remove the filter insert from the inlet opening of the spray arm without tools and clean it if necessary. After cleaning the filter insert, it must be reinserted into the inlet opening of the spray arm.
  • the spray arm can then be recoupled to the support arm by bringing the nut into operative connection with the thread surrounding the inlet opening and tightening it.
  • the Filter insert In the final assembled state is the Filter insert with its annular flange again clamped between the edge section surrounding the inlet opening on the one hand and the associated opposite of the support arm on the other hand, which ensures a precise and secure arrangement of the filter insert in the inlet opening.
  • the filter section is designed as a sieve.
  • this can be a plastic part with a grid-like mesh configuration.
  • the filter section may include a filter mesh, wire mesh, and/or sponge.
  • a three-dimensional filter in the form of a filter mesh, a wire mesh and/or a sponge to be placed upstream of the filter section designed as a sieve.
  • Such a three-dimensional filter is preferably arranged in a detachable manner on the filter section, so that the filter section can be separated from the three-dimensional filter by the user, particularly in the event of cleaning.
  • the mesh width of the filter section which is preferably designed as a sieve, is smaller than the spray nozzle diameter. This ensures that dirt particles or similar contaminants that could lead to a blockage of the spray nozzle are held back. Smaller dirt particles, which can also pass through the spray nozzle, are let through by the filter section. This has the advantage that the filter section does not become clogged too quickly, unintentionally.
  • the filter section is of spherical design.
  • This embodiment proves to be advantageous for two reasons in particular.
  • the available filter area is increased overall by the spherical design.
  • the spherical configuration allows the formation of a volume space that can serve to accommodate a three-dimensional filter such as a sponge, a filter mesh and/or the like.
  • the filter insert is made of plastic. This enables the design of a robust, but at the same time also dimensionally stable and corrosion-resistant component. Alternatively, it can be provided to form the filter cartridge from metal.
  • the Figures 1 to 3 and 5 to 8 reveal a spray arm 1 according to the invention, namely according to a first embodiment, as is typically called washroom-mounted spray arm below a lower rack of a dishwasher is used.
  • the Figures 9 to 12 show a spray arm 1 according to the invention according to a second embodiment, as it is used as a spray arm mounted on a dishwashing basket, typically above a lower basket or below an upper basket.
  • the spray arm 1 has a base body that is formed from two half-shells 2 and 3 .
  • the two half-shells 2 and 3 define a volume space that serves as a rinsing liquor channel 6 .
  • An inlet opening 4 is provided on the inlet side of the rinsing liquor channel 6 , via which rinsing liquor enters the spray arm 1 , that is to say into the rinsing liquor channel 6 accommodated by the spray arm 1 , when used as intended.
  • Spray nozzles 5 are provided on the outlet side of the rinsing liquor channel 6, via which rinsing liquor is discharged in the direction of the items to be washed when used as intended.
  • the dishwashing liquid channel 6 serves as a flow connection between the inlet opening 4 and the spray nozzles 5.
  • the spray arm 1 is equipped with a filter means, which is designed as a filter insert 7 according to the invention. 4 shows the filter insert 7 in a schematic perspective view.
  • the filter insert 7 is positioned within the inlet opening 4 in an exchangeable manner according to the invention. It can therefore be removed from the inlet opening 4 or reinserted into it as desired by the user. In this case, it is possible for the user to remove the filter insert 7 from the inlet opening 4, in particular for the purpose of cleaning.
  • the filter insert 7 has a filter section 8 and a fastening section 9 .
  • the filter section 8 is designed in the manner of a sieve and provides a mesh-like lattice, the mesh size being smaller than the diameter of the spray nozzles 5 .
  • the mesh size can be between 1 mm and 3 mm, preferably 2 mm.
  • the fastening section 9 is designed as an annular flange 10 which surrounds the filter section 8 at one end.
  • the inlet opening 4 provides an edge section 11 surrounding the inlet opening 4 at the edge. This degrades the representation in particular 1 with respect to the first embodiment and the illustration 12 for the second embodiment.
  • the annular flange 10 of the filter insert 7 is in contact with the edge section 11 of the inlet opening 4 .
  • the filter section 8 of the filter insert 7 is spherical. This creates an optimally large filter surface.
  • a volume or cavity is provided by the filter section 8, which can serve to accommodate additional filter elements, in particular three-dimensional filters.
  • additional filter elements in particular three-dimensional filters.
  • wire, steel wool and/or similar fabrics and/or sponges can serve as three-dimensional filters.
  • a nut 14 is used in a manner known per se to ensure that the spray arm 1 is securely positioned within the washing compartment of a dishwasher, as is the case, for example, with reference to the embodiment according to FIG Figures 9 to 12 can be seen.
  • the spray arm 1 is held by a support arm 12 .
  • the support arm 12 provides an inflow channel 13, via which washing liquor is supplied to the spray arm 1 in the intended use case.
  • the support arm 12 opens into a socket 15 which carries a nut 14 which can be rotated through 360°.
  • the internal thread provided by the nut 14 interacts with an external thread which is formed on the outside of the inlet opening 4 .
  • the spray arm 1 To assemble the spray arm 1 , it is to be attached to the support arm 12 on the connection piece side, with the nut 14 carried by the connection piece 15 being brought into screwed engagement with the thread formed on the outside of the inlet opening 4 . Then the nut is to be tightened so that the spray arm 1 presses against the socket 15.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (7)

  1. Bras de pulvérisation destiné à être monté sur une tubulure (15) d'un bras de support (12) fourni par un lave-vaisselle, comportant une ouverture d'entrée (4) pour un bain de lavage, une buse de pulvérisation (5), un canal de bain de lavage (6) reliant la buse de pulvérisation (5) à l'ouverture d'entrée (4) par communication fluidique et un moyen de filtrage, le moyen de filtrage étant un insert de filtrage (7) pouvant être positionné de manière interchangeable dans l'ouverture d'entrée (4), caractérisé en ce que l'insert de filtrage (7) présente une section de filtrage (8) et une section de fixation (9) formée d'un seul tenant avec celle-ci,
    dans lequel la section de fixation (9) présente une bride annulaire (10) disposée de manière circonférentielle sur la section de filtrage (8),
    dans lequel une section de bord (11) coopérant avec la bride annulaire (10) à l'état monté final est formée côté extérieur de l'ouverture d'entrée (4),
    et dans lequel la bride annulaire (10) circonférentielle est serrée entre la section de bord (11) côté ouverture d'entrée en tant que première butée et la tubulure (15) en tant que seconde butée à l'état monté final du bras de pulvérisation (1).
  2. Bras de pulvérisation selon la revendication 1,
    caractérisé en ce
    que la section de filtrage (8) est formée en tant que tamis.
  3. Bras de pulvérisation selon la revendication 2,
    caractérisé en ce
    que le tamis présente une largeur de maille inférieure au diamètre de buse de pulvérisation.
  4. Bras de pulvérisation selon l'une des revendications précédentes,
    caractérisé en ce
    que la section de filtrage (8) présente un treillis de filtrage.
  5. Bras de pulvérisation selon l'une des revendications précédentes,
    caractérisé en ce
    que la section de filtrage (8) présente un tissu métallique et/ou une éponge.
  6. Bras de pulvérisation selon l'une des revendications précédentes,
    caractérisé en ce
    que la section de filtrage (8) est en forme de dôme.
  7. Bras de pulvérisation selon l'une des revendications précédentes,
    caractérisé en ce
    que l'insert de filtrage (7) est en matière plastique.
EP20167645.9A 2019-04-04 2020-04-02 Bras pulvérisateur pour un lave-vaisselle Active EP3718458B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019108871.2A DE102019108871A1 (de) 2019-04-04 2019-04-04 Sprüharm für eine Geschirrspülmaschine

Publications (2)

Publication Number Publication Date
EP3718458A1 EP3718458A1 (fr) 2020-10-07
EP3718458B1 true EP3718458B1 (fr) 2022-11-30

Family

ID=70165780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20167645.9A Active EP3718458B1 (fr) 2019-04-04 2020-04-02 Bras pulvérisateur pour un lave-vaisselle

Country Status (2)

Country Link
EP (1) EP3718458B1 (fr)
DE (1) DE102019108871A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9421608U1 (de) * 1994-10-25 1996-03-28 Bauknecht Hausgeräte GmbH, 70565 Stuttgart Vorrichtung zum Abdichten des Überganges zwischen einem Sprüharm und seinem Lagerteil einer Geschirrspülmaschine
CN104224071B (zh) * 2013-06-05 2017-11-28 宁波方太厨具有限公司 开放式水槽清洗机
CN105283110A (zh) * 2013-07-03 2016-01-27 伊莱克斯电器股份公司 洗碗机喷洒臂
SE540513C2 (en) * 2016-03-30 2018-09-25 Granuldisk Ab Granule valve arrangement for a dishwashing apparatus
CN109549590A (zh) * 2019-01-25 2019-04-02 浙江气派智能科技有限公司 一种喷淋系统及设置有该喷淋系统的清洗机

Also Published As

Publication number Publication date
EP3718458A1 (fr) 2020-10-07
DE102019108871A1 (de) 2020-10-08

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