EP1752080B1 - Lave-vaisselle du type transport comportant des moyens pour réduire la salissure du fluide de lavage - Google Patents

Lave-vaisselle du type transport comportant des moyens pour réduire la salissure du fluide de lavage Download PDF

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Publication number
EP1752080B1
EP1752080B1 EP06012920A EP06012920A EP1752080B1 EP 1752080 B1 EP1752080 B1 EP 1752080B1 EP 06012920 A EP06012920 A EP 06012920A EP 06012920 A EP06012920 A EP 06012920A EP 1752080 B1 EP1752080 B1 EP 1752080B1
Authority
EP
European Patent Office
Prior art keywords
wash
liquid
wash liquid
filtration
section
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.)
Ceased
Application number
EP06012920A
Other languages
German (de)
English (en)
Other versions
EP1752080A3 (fr
EP1752080A2 (fr
Inventor
Dietrich Berner
Klaus Dr. Padtberg
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.)
Premark FEG LLC
Original Assignee
Premark FEG LLC
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 Premark FEG LLC filed Critical Premark FEG LLC
Publication of EP1752080A2 publication Critical patent/EP1752080A2/fr
Publication of EP1752080A3 publication Critical patent/EP1752080A3/fr
Application granted granted Critical
Publication of EP1752080B1 publication Critical patent/EP1752080B1/fr
Ceased 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
    • A47L15/24—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors
    • A47L15/247—Details specific to conveyor-type machines, e.g. curtains

Definitions

  • the invention relates to a transport dishwasher in the form of a belt conveyor dishwasher or a basket conveyor dishwasher according to the preamble of claim 1.
  • Such a transport dishwasher is for example from the document CH 262 228 A known.
  • This prior art relates to a transport dishwasher, which has at least one washing zone, in which washing liquid is sprayed onto the items to be cleaned.
  • a wash tank for receiving sprayed washing liquid from the treatment chamber.
  • a washing pump is provided below the treatment chamber belonging to the treatment chamber.
  • the washing pump serves to convey washing liquid from the washing tank via a washing liquid line system to washing nozzles.
  • the washing nozzles are directed in the treatment chamber to the area of the items to be cleaned, to spray washing liquid on the items to be cleaned.
  • the sprayed washing liquid flows back into the wash tank by gravity.
  • the document EP 0 995 483 A1 discloses a filter device having a microfiltration device or an ultrafiltration device.
  • the washware is transported by a transport device through one or more wash zones and a final rinse zone of the conveyor warewashing machine. From zone to zone, a fluid cascade is formed whose flow direction of the Transport direction is opposite. When the liquid cascade is interrupted, the washing liquid in the wash tanks of the liquid cascade no longer receives regeneration by dilution with fresh water. Depending on the entry of dirt from the items to be washed into the washing liquid (wash liquid), this washing liquid can become very dirty, so that this results in a reduced cleaning capacity.
  • the problem to be solved is to keep the cleaning efficiency constant throughout the service life.
  • a microfiltration device or an ultrafiltration device according to the invention can be provided for one or more wash zones. Preferably, this is located in the wash tank of the washing zone concerned Washing liquid processed in a cycle. For this treatment of the wash water no fresh water (fresh water) is needed, but it will only remove the contaminants located in the washing liquid from the washing liquid.
  • Wash liquid is water to which detergent (detergent) is added.
  • Rinse aid may be fresh water with or without rinse aid.
  • the conveyor-type warewashing machine can be a flight-type goods washer in which the washware to be cleaned is transported by a conveyor belt through the machine, or a basket transport dishwasher (FIG. Rack conveyor ware washer), in which the wash ware is transported in baskets on the transport device through the machine.
  • a flight-type goods washer in which the washware to be cleaned is transported by a conveyor belt through the machine
  • a basket transport dishwasher FIG. Rack conveyor ware washer
  • the transport dishwasher of Fig. 1 contains a transport device 2, the transport direction 4 is indicated by an arrow.
  • the washware may be of any type, eg. As plates, cups, glasses, cutlery, trays, pots, pans.
  • the transport dishwasher contains at least one, z. B. according to the drawings two (or more) in the transport direction 4 successively arranged wash zones 6 and 8 (wash zones) for washing the dishes with wash liquid (wash liquid), and a rinse zone 14 (final rinse zone) for rinsing (final rinse) of Wash ware with rinse aid (final rinse liquid).
  • the washing liquid is water to which detergent is added.
  • Final rinse liquid may be fresh water with or without rinse aid.
  • each washing zone 6 and 8 are upper and lower washing nozzles 20, 22 and 24, 26 for spraying washing liquid (wash liquid) on the washware, which is located on the transport device 2.
  • the washing zones 6 and 8 are each provided with a wash tank 28 or 30 (wash tank), in which washing liquid sprayed from the washing nozzles 20, 22 or 24, 26 collects. From the washing tanks 28 and 30, washing liquid is recirculated back to the washing nozzles 20, 22 and 24, 26, respectively, by a washing liquid supply pipe 38 and 40, each containing a pump 34 and 36, respectively.
  • the wash liquid supply line 38 or 40 and the associated wash tank 28 or 30 form a washing liquid Rezirkulationsstrang 28/38 and 30/40.
  • Each washing liquid recirculation line 28/38 or 30/40 together with the associated washing zone 6 or 8 and their washing nozzles 20, 22 and 24, 26, a washing liquid recirculation circuit.
  • the rinse zone 14 (final rinse zone) is provided with upper and lower rinsing spray nozzles 42 and 44, respectively, to which rinse liquid (final rinse liquid) can be supplied via a final rinse liquid supply line 46.
  • the sprayed rinse liquid collects in a rinse tank 48 (post-wash tank).
  • This pre-rinse liquid is supplied through a post-wash liquid supply line 50 containing a pump 51 to upper and lower post-wash nozzles 52 and 54, respectively.
  • the Nachwaschcroftkeit is thus pre-used final rinse liquid.
  • post-wash zone 12 may also be referred to as a pre-rinse zone
  • post-wash liquid may also be referred to as a pre-rinse liquid.
  • the post-wash tank 48 can also be referred to as a pre-rinse tank.
  • the Nachwaschlotkeit sprayed by the Nachwasch spray nozzles 52 and 54 passes partially into the Nachwaschtank 48 and partially via a guide plate 60 in the last wash tank 30th
  • the wash tanks 28 and 30 and the Nachwaschtank 48 form a liquid cascade system in which the liquid overflows from one to the other tank against the transport direction 4 of the transport device 2.
  • liquid from the rinse tank 48 flows into the last wash tank 30 and from there into the next wash tank 28.
  • the last wash tank 28 in this flow direction which is the first tank in the transport direction 4, is preferably provided with a dirty liquid drain 62.
  • a dryer 64 may be arranged for drying the cleaned items to be washed.
  • a washing liquid filtration strand 70 is provided for the removal and then filtration of sprayed washing liquid from the washing liquid recirculation line 30/40 of the respective washing zone 8 and for returning filtered washing liquid to the same washing liquid recirculation line 30 / 40th
  • the scrubbing liquid filtration column 70 contains a microfiltration device 72 or an ultrafiltration device 72 for filtering the scrubbing liquid.
  • the essential difference between the microfiltration and the ultrafiltration lies in the different pore sizes of the filter elements. Filtration through filter elements having a pore size ⁇ 0.1 .mu.m is called ultrafiltration, while filtration at pore sizes> 0.1 .mu.m to 100 .mu.m is referred to as microfiltration.
  • the scrubbing liquid filtration strand 70 is preferably formed as a filtration circuit, in which a portion 30 of the scrubbing liquid Rezirkulationsstrangs 30/40 is integrated, so that from this section 30 scrubbing liquid flows into the scrubbing liquid filtration strand 70 and after filtering the scrubbing liquid the filtered washing liquid part flows back into this section 30 again.
  • the section 30 may theoretically be any element of the scrubbing liquid recirculation line 30/40, but is preferably the scrubbing tank 30 of the scrubbing zone 8 in question.
  • the microfiltration device 72 or the ultrafiltration device 72 has a cross-flow filter 74 for microfiltration or ultrafiltration of the sprayed washing liquid.
  • the cross-flow filter 74 contains at least one primary chamber 76 and at least one secondary chamber 78, which are separated from each other by at least one microfiltration element 80 or at least one ultrafiltration element 80.
  • a portion of the scrubbing liquid filtration string 70 is formed by an internal recirculation circuit 82 for recirculating unfiltered scrubbing liquid, in which the primary chamber 76 and downstream of the primary chamber 76, a liquid collection element 84 are arranged.
  • a feed section 86 of the scrubbing liquid filtration line 70 for supplying sprayed scrubbing liquid from the scrubbing liquid recirculation line 30/40 also opens into the liquid collecting element 84.
  • the secondary chamber 78 serves to receive the washing liquid part filtered by the at least one microfiltration element 80 or ultrafiltration element 80, which is a partial flow of the main flow of washing liquid flowing into the primary chamber 76.
  • the internal recirculation circuit 82 includes a pump 88 for supplying wash liquid from the liquid collection element 84 into the primary chamber 76.
  • the liquid collection element 84 is preferably a collection tank for receiving sprayed wash liquid from the wash liquid recirculation strand 30/40 of the at least one wash zone 8 and for receiving wash liquid which is returned from the primary chamber 76 to the collection tank 84.
  • the collection tank 84 is preferably designed to collect dirt and provided with a dirt outlet 90 for removing debris from the washing liquid.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (5)

  1. Lave-vaisselle à transport continu se présentant sous la forme d'un lave-vaisselle à bande transporteuse ou d'un lave-vaisselle à transport de paniers, comprenant
    - au moins une zone de lavage (6, 8), qui présente des buses de lavage (20, 22, 24, 26) pour un liquide de lavage et qui est pourvue d'une branche de recirculation de fluide de lavage (28/38, 30/40), cette dernière branche comprenant une cuve de lavage (28, 30) pour collecter au moins une partie du liquide de lavage projeté et une conduite d'arrivée de liquide de lavage (38, 40) avec une pompe (34, 36) pour amener du liquide de lavage de la cuve de lavage (28, 30) aux buses de lavage (20, 22, 24, 26);
    - une zone de rinçage (14) avec des buses de rinçage (42, 44) pour un liquide de rinçage; et
    - un dispositif de transport (2) pour transporter la vaisselle à travers les zones (6, 8, 14), dans lequel la direction de transport (4) du dispositif de transport (2) est orientée de ladite au moins une zone de lavage (6, 8) vers la zone de rinçage (14),
    caractérisé en ce que
    il est prévu pour ladite au moins une zone de lavage (6, 8) une branche de filtrage de liquide de lavage (70) destinée à prélever et ensuite à filtrer du liquide de lavage projeté provenant de la branche de recirculation de liquide de lavage (28/38, 30/40) et à renvoyer du liquide de lavage filtré dans la branche de recirculation de liquide de lavage (28/38, 30/40), dans lequel la branche de filtrage de liquide de lavage (70) comprend un dispositif de micro- ou d'ultrafiltration (72) pour filtrer du liquide de lavage projeté, dans lequel le dispositif de micro- ou d'ultrafiltration (72) comprend un.filtre à écoulement transversal (74) avec au moins une chambre primaire (76) et au moins une chambre secondaire (78) séparée par au moins un élément de micro- ou d'ultrafiltration (80); et dans lequel le dispositif de micro- ou d'ultrafiltration (72) comprend un élément de collecte de liquide (84), dans lequel débouche une partie d'arrivée (86) de la branche de filtrage de liquide de lavage (70) pour amener du liquide projeté provenant de la branche de recirculation de liquide de lavage (30/40), et une pompe (88) pour amener du liquide de lavage de l'élément de collecte de liquide (84) dans la chambre primaire (76).
  2. Lave-vaisselle à transport continu selon la revendication 1, dans lequel la branche de filtrage de liquide de lavage (70) est réalisée sous la forme d'un circuit de filtrage, dans lequel la cuve de lavage (28, 30) de la branche de recirculation de liquide de lavage (28/38, 30/40) est intégrée, de telle manière que du liquide de lavage provenant de la cuve de lavage (28, 30) s'écoule dans la branche de filtrage de liquide de lavage (70) et que la partie filtrée de liquide de lavage retourne de nouveau dans la cuve de lavage (28, 30) après le filtrage du liquide de lavage.
  3. Lave-vaisselle à transport continu selon la revendication 1 ou 2, dans lequel une partie de la branche de filtrage de liquide de lavage (70) est formée par un circuit de recirculation interne (82) pour la recirculation de liquide de lavage non filtré, dans lequel la chambre primaire (76) est disposée dans le circuit de recirculation interne et l'élément de collecte de liquide (84) est disposé en aval de la chambre primaire (76), et
    dans lequel ladite au moins une chambre secondaire (78) est conçue pour contenir la partie du liquide de lavage filtrée par ledit au moins un élément de microfiltration (80) ou d'ultrafiltration (80), cette dernière partie étant un courant partiel du courant principal de liquide de lavage s'écoulant dans la chambre primaire (76).
  4. Lave-vaisselle à transport continu selon l'une quelconque des revendications précédentes, dans lequel l'élément de collecte de liquide (84) est une cuve de collecte destinée à contenir du liquide de lavage projeté provenant de la branche de recirculation de liquide de lavage (28/38, 30/40) de ladite au moins une zone de lavage (6, 8) et du liquide de lavage, ce dernier étant en recirculation à partir de la chambre primaire (76).
  5. Lave-vaisselle à transport continu selon la revendication 4, dans lequel la cuve de collecte (84) présente une sortie de saletés (90) permettant d'évacuer les saletés hors du liquide de lavage.
EP06012920A 2005-08-12 2006-06-23 Lave-vaisselle du type transport comportant des moyens pour réduire la salissure du fluide de lavage Ceased EP1752080B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005038433A DE102005038433A1 (de) 2005-08-12 2005-08-12 Transport-Geschirrspülmaschine

Publications (3)

Publication Number Publication Date
EP1752080A2 EP1752080A2 (fr) 2007-02-14
EP1752080A3 EP1752080A3 (fr) 2007-11-07
EP1752080B1 true EP1752080B1 (fr) 2010-10-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06012920A Ceased EP1752080B1 (fr) 2005-08-12 2006-06-23 Lave-vaisselle du type transport comportant des moyens pour réduire la salissure du fluide de lavage

Country Status (4)

Country Link
US (1) US20070034240A1 (fr)
EP (1) EP1752080B1 (fr)
CA (1) CA2555143C (fr)
DE (2) DE102005038433A1 (fr)

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Also Published As

Publication number Publication date
EP1752080A3 (fr) 2007-11-07
DE502006008118D1 (de) 2010-12-02
DE102005038433A1 (de) 2007-02-15
EP1752080A2 (fr) 2007-02-14
US20070034240A1 (en) 2007-02-15
CA2555143A1 (fr) 2007-02-12
CA2555143C (fr) 2010-02-02

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