EP1997420B1 - Lave vaisselle industriel - Google Patents

Lave vaisselle industriel Download PDF

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Publication number
EP1997420B1
EP1997420B1 EP08156113A EP08156113A EP1997420B1 EP 1997420 B1 EP1997420 B1 EP 1997420B1 EP 08156113 A EP08156113 A EP 08156113A EP 08156113 A EP08156113 A EP 08156113A EP 1997420 B1 EP1997420 B1 EP 1997420B1
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EP
European Patent Office
Prior art keywords
liquid
dishwasher according
pump
dishwasher
pumps
Prior art date
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Active
Application number
EP08156113A
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German (de)
English (en)
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EP1997420A3 (fr
EP1997420A2 (fr
Inventor
Udo Bürkle
Martin Schrempp
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Premark FEG LLC
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Premark FEG LLC
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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
    • A47L15/241—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors the dishes moving in a horizontal plane
    • 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
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • A47L15/0078—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals with a plurality of fluid recirculation arrangements, e.g. with separated washing liquid and rinsing liquid recirculation circuits
    • 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/04—Crockery or tableware details, e.g. material, quantity, condition
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/10—Water cloudiness or dirtiness, e.g. turbidity, foaming or level of bacteria
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction

Definitions

  • the invention relates to a commercial dishwasher according to the preamble of claim 1.
  • washing zone 140 A1 is a commercial dishwasher in the form of a conveyor dishwasher known, which has two washing zones and in Spülgut-transport direction after the washing zones at least one rinse zone.
  • the washing zones each contain a washing system with washing nozzles, wherein a washing tank for collecting the washing liquid sprayed in the washing zone in question is provided for each washing zone.
  • the washing liquid sprayed from the washing nozzles present therefrom is recirculated back from the associated washing tank by means of a pump through a washing liquid feed line back to the washing nozzles.
  • the program automates have a single treatment chamber for receiving and treating items to be washed.
  • a dish rack is provided in which the items to be washed can be loaded.
  • the treatment chamber can be closed by a door.
  • the conveyor dishwashers have at least one washing zone and at least one final rinse zone.
  • Hood machines have a treatment zone under a hood arranged to be moved up and down.
  • a programmer is for example from the DE 10 2005 023 429 A1 known.
  • Transport dishwashers are for example from the WO 2006/007236 A2 .
  • WO 2005/070276 EP 1 637 059 A2 and DE 10 2005 035 764 A1 known.
  • Dishware is especially dishes, glasses, cutlery, cooking utensils, baking utensils and serving trays.
  • a pole-changing electric centrifugal pump is used to promote the washing liquid, which can be switched from a two-pole operation to a four-pole operation, then by such a pole change a speed reduction of the pump motor of 3000 revolutions / min. to 1500 revolutions / min. be achieved.
  • This reduction in the speed causes a change in the water pressure at the pump outlet (pump discharge side).
  • the water pressure is not halved, but it changes from about 1.0 bar at 3000 U / min. to about 0.25 bar at 1500 rpm. Due to this non-proportional change of the washing liquid pressure for glasses and dishes is often too low. More advantageous would be a washing liquid pressure of about 0.5 bar.
  • the liquid pressure acting on the items to be washed depends on the conduit system installed in the dishwasher, for example a washing system and / or a rinse aid system.
  • the problem to be solved is to provide a way by which in a simple manner, alternatively, two different liquid pressures can be generated, each fluid pressure is matched to the different items to be cleaned.
  • the invention generally relates to a commercial dishwasher in which at least two centrifugal pumps connected in series are arranged upstream of at least one washing system and / or a final-rinse system.
  • both pumps have identical pump characteristics.
  • the two pumps have different pump characteristics.
  • an operation is possible only with the upstream of the two pumps in series or with both pumps.
  • operation is possible only with the downstream of the two pumps in series or with both pumps.
  • a soft start and thus a gentle increase in pressure is achieved in that at the start of a wash cycle or a rinse cycle initially only one of the two pumps is turned on and after a predetermined time delay or after a by other criteria specific time delay, the other pump is additionally turned on.
  • two standard pumps can be hydraulically connected in series in series.
  • the invention uses the knowledge that the pressures of two pumps arranged hydraulically one behind the other add up. With two hydraulic centrifugal pumps arranged one behind the other, the pressure is approximately doubled. The volume flow is thereby changed only insignificantly.
  • the head h is given in meters (m).
  • the volume flow Q is given in m 3 / h.
  • P1 denotes the pump characteristic of a pump 1;
  • P2 denotes the pump characteristic of a further pump 2 connected in series with the pump 1;
  • P1 + P2 designates the pump characteristic of the series connection of both pumps 1 and 2.
  • the pump characteristics cross the system characteristic "A", which depends on the respective pipe system of the dishwasher.
  • B1 denotes an operating point of a pump 1;
  • B2 denotes an operating point of the other pump 2; and
  • B3 denotes an operating point of the series connection of the two pumps 1 and 2.
  • the characteristic diagram of Fig. 1 shows from the registered heights h1, h2 and h3, that the increase between each of the individual pump characteristics P1 and P2 and the common characteristic P1 + P2 of the series connection of both pumps 1 and 2 the stronger, the steeper the system characteristic "A" between the Operating points B1, B2 and B3.
  • the volume flow Q On the horizontal axis of the characteristic diagram, it can be seen, for the volume flow Q, that the increase in the volume flow Q1 of one pump or of the volume flow Q2 of the other pump to the volume flow Q3 of the series connection of the two pumps is relatively small.
  • the invention offers the possibility to operate for the low pressure operation only the pump 1 with the pressure P1 and for the high pressure operation, the pump 1 with the pressure P1 and the pump 2 with the pressure P2 at short intervals one behind the other (or simultaneously) to start and then to operate both together.
  • two pumps may be used, one of which has a different power than the other pump or a different pump characteristic than the other pump.
  • the fluid pressure depending on the design of the line system may be higher or lower than when operating alone with the pump. 1
  • the invention advantageously also offers the possibility of achieving three different liquid pressures of washing liquid or final rinse liquid by the combination of only two pumps 1 and 2.
  • Fig. 2 schematically shows a commercial dishwasher in the form of a programmer according to the invention. It contains two in series successively arranged pumps 1 and 2, hereinafter referred to as washing pumps, in a washing liquid flow line 4, which connects the lower end of a wash tank 6 with at least one lower wash arm 8 and an upper wash arm 10 hydraulically.
  • the washing arms 8 and 10 are located in a treatment chamber 12 below or above the Spülgutability Suites and are each provided with spray nozzles 8-2 and 10-2, which are directed against the dishes.
  • a cleaner metering pump 13 For supplying cleaner in the wash tank, a cleaner metering pump 13 may be provided.
  • a pressure switch 14 may be provided.
  • a heater 16 For heating the washing liquid in the washing tank 6, a heater 16 may be provided.
  • a drain line 20 may be connected to a drain pump 22.
  • washing pumps 1 and 2 of Fig. 2 are switched on by a control device 24 by at least one user program individually or in combination according to at least one of the variants described above with reference to the Fig. 1 have been described or defined in the claims.
  • a fresh water supply line 26 is connectable at its upstream start via a solenoid valve 28 with a fresh water supply hose 30.
  • the downstream end of the fresh water supply line 26 is connected to a water inlet device 32, via which fresh water can flow into a water heater 34.
  • a rinse aid supply line for example a rinse aid dosing pump 36 for the supply of rinse aid, is connected to the water heater 34 in the water of the water heater 34.
  • the final rinse liquid of the water heater 34 is passed through a rinse aid 40 to a lower rinse arm 44 and at least one upper rinse arm 46, and through spray nozzles 44-2 and 46-2 respectively formed therein into the processing chamber 12 (FIG. not shown) ware sprayed.
  • the water heater 34 may be provided with an emptying device 48.
  • two rinse pumps can be arranged in series with one another and alternatively switched on according to at least two different variants, as described with reference to FIGS FIGS. 1 and 2 for the washing pumps 1 and 2 have been described.
  • Fig. 3 shows a transport dishwasher according to the invention, which, for example, in the following order, in which items 250 transported by a transport device 252 in the transport direction 254, a prewash zone 262, a first wash zone 264, a second wash zone 266 and a final rinse zone 268 contains.
  • a tank 263 or 265 or 267 or 269 for receiving the liquid sprayed in the respective zone.
  • the tanks 269, 267, 265 and 263 form a cascade circuit in which liquid in a liquid direction 270 overflows into the respectively adjacent tank, wherein the liquid flow direction 270 is opposite from tank to tank to the transport direction 254.
  • rinse liquid can be fed to spray nozzles 274 and 276, which are arranged in the final rinse zone 268 above and below the transport device 252.
  • washing liquid pipe system 278 washing liquid from the second washing tank 267 to spray nozzles 280 and 282 is conveyed, which in the second washing zone 266 below and above the transport device 252 are arranged.
  • the two series-arranged washing pumps 201 and 202 are switched on in the same way individually or together, as described above with reference to the FIGS. 1 and 2 with respect to pumps 1 and 2 has been described.
  • wash liquid line system 284 is a series arrangement of two wash pumps 301 and 302 for pumping wash liquid from the wash tank 265 to lower and upper spray nozzles 286 and 288 in the second wash zone 264.
  • the two series (sequential) pumps 301 and 302 are individually or jointly switched on, as described above with respect to the pumps 1 and 2 of FIGS. 1 and 2 has been described.
  • lower spray nozzles 290 and upper spray nozzles 292 for spraying prewash liquid 294 are located on the washware 250 to be cleaned.
  • the transport dishwasher of Fig. 3 is controlled by a controller 320 which includes at least one application program therefor.
  • Fig. 4 shows a further embodiment of a transport dishwasher according to the invention, in which Fig. 3 Matching parts are provided with the same reference numerals and which of Fig. 3 characterized *** in that the final rinse liquid supply means 272 directs the final rinse liquid into the final rinse liquid tank 269.
  • the rinse liquid is conveyed from the tank 269 by the series connection of two pumps 401 and 402 to the lower and upper spray nozzles 274 and 276, respectively, of the final rinse zone 268.
  • the final rinse liquid can be delivered with at least two different pressures, as described above with respect to the pumps 1 and 2 of FIG FIGS. 1 and 2 has been described.
  • the variants are preferably switched on automatically by at least one application program (cleaning program) of the control device. Furthermore, embodiments of the invention are possible in which the switching on of the variants is only possible manually or alternatively is possible automatically or manually.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (19)

  1. Lave-vaisselle industriel, comprenant au moins un réservoir (6 ; 263, 265, 267, 269 ; 34) ; des buses de pulvérisation (44-2, 46-2, 8-2, 10-2 ; 274, 276, 280, 282, 286, 288, 290, 292) pour pulvériser du liquide dans une région de traitement en forme de chambre de traitement (12) ou de zone de traitement (262, 264, 266, 268) pour le traitement de vaisselle ; au moins deux pompes centrifuges (1, 2 ; 40 ; 201, 202 ; 301, 302 ; 401, 402) pour refouler du liquide hors du réservoir jusqu'aux buses de pulvérisation ; un dispositif de commande (320) pour mettre en marche au moins l'une des au moins deux pompes centrifuges (1, 2 ; 40 ; 201, 202 ; 301, 302 ; 401, 402),
    caractérisé en ce que
    les au moins deux pompes centrifuges (1, 2 ; 40 ; 201, 202 ; 301, 302 ; 401, 402) sont disposées hydrauliquement les unes derrière les autres en série, et le dispositif de commande (320) est conçu pour faire fonctionner en alternance seulement une pompe centrifuge ou au moins deux des pompes centrifuges montées hydrauliquement les unes derrière les autres en série, afin de faire ainsi varier la pression de liquide avec laquelle le liquide est pulvérisé dans la région de traitement pour le traitement de la vaisselle.
  2. Lave-vaisselle selon la revendication 1, dans lequel
    le côté aspiration de la pompe centrifuge amont (1 ; 40 ; 201 ; 301 ; 401) est raccordé ou peut être raccordé à l'intérieur du réservoir et le côté pression de la pompe centrifuge aval (2 ; 40 ; 202 ; 302 ; 402) est raccordé ou peut être raccordé aux buses de pulvérisation.
  3. Lave-vaisselle selon l'une quelconque des revendications précédentes, dans lequel la pompe centrifuge amont (1) peut être mise en marche seule, sans l'au moins une autre pompe centrifuge (2), par le dispositif de commande.
  4. Lave-vaisselle selon l'une quelconque des revendications précédentes, dans lequel la pompe centrifuge aval (2) peut être mise en marche seule, sans l'au moins une autre pompe centrifuge (1), par le dispositif de commande.
  5. Lave-vaisselle selon l'une quelconque des revendications précédentes, dans lequel le dispositif de commande (24 ; 320) est réalisé de manière à mettre en marche automatiquement d'abord seulement l'une des pompes centrifuges (1, 2), et seulement après un certain intervalle de temps, à mettre en marche en plus au moins une autre des pompes centrifuges (2, 1) et à faire fonctionner hydrauliquement en série les pompes centrifuges mises en marche, de sorte que deux pressions de liquide différentes soient produites l'une après l'autre, la première pression de fluide étant inférieure à la deuxième pression de fluide.
  6. Lave-vaisselle selon la revendication 5, dans lequel
    l'intervalle de temps est défini par un temps de retard prédéterminé.
  7. Lave-vaisselle selon la revendication 5 dans lequel
    l'intervalle de temps dépend d'un critère de fonctionnement prédéterminé.
  8. Lave-vaisselle selon la revendication 7, dans lequel
    le critère de fonctionnement prédéterminé est l'un des critères suivants : le type de vaisselle, le degré de salissure de la vaisselle, le degré de salissure du liquide.
  9. Lave-vaisselle selon l'une quelconque des revendications précédentes, dans lequel
    le dispositif de commande (24 ; 320) est réalisé de telle sorte que toutes les pompes centrifuges soient coupées en même temps.
  10. Lave-vaisselle selon l'une quelconque des revendications 1 à 8, dans lequel
    le dispositif de commande (24 ; 320) est réalisé de telle sorte que les pompes centrifuges soit coupées les unes après les autres.
  11. Lave-vaisselle selon l'une quelconque des revendications précédentes, dans lequel
    toutes les pompes centrifuges sont réalisées de manière à fournir la même puissance de refoulement.
  12. Lave-vaisselle selon l'une quelconque des revendications 1 à 10, dans lequel
    l'une des pompes centrifuges a une autre puissance de refoulement qu'au moins une autre des pompes centrifuge.
  13. Lave-vaisselle selon l'une quelconque des revendications précédentes, dans lequel toutes les pompes centrifuges ont des caractéristiques de pompe identiques.
  14. Lave-vaisselle selon l'une quelconque des revendications 1 à 12, dans lequel
    les pompes centrifuges ont des caractéristiques de pompe différentes.
  15. Lave-vaisselle selon l'une quelconque des revendications précédentes, dans lequel le lave-vaisselle est un appareil automatique programmable avec une chambre de traitement (12) dans laquelle la vaisselle peut être introduite manuellement.
  16. Lave-vaisselle selon l'une quelconque des revendications 1 à 14, dans lequel
    le lave-vaisselle est un lave-vaisselle à avancement automatique contenant au moins deux zones de traitement (262, 264, 266, 268) et un dispositif de transport (252) pour le transport automatique de la vaisselle à travers les zones de traitement.
  17. Lave-vaisselle selon l'une quelconque des revendications précédentes, dans lequel la région de traitement est une chambre de lavage ou une zone de lavage et le liquide est du liquide de lavage.
  18. Lave-vaisselle selon l'une quelconque des revendications précédentes, dans lequel la région de traitement (12) est une chambre de rinçage à liquide clair ou une zone de rinçage à liquide clair (268) et le liquide est un liquide de rinçage clair.
  19. Procédé pour faire fonctionner un lave-vaisselle industriel selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la pression de liquide avec laquelle le liquide est pulvérisé dans la chambre de traitement pour le traitement de la vaisselle est modifiée automatiquement par commande programmable d'au moins deux pompes centrifuges disposées en série les unes derrière les autres.
EP08156113A 2007-05-26 2008-05-13 Lave vaisselle industriel Active EP1997420B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007024799A DE102007024799A1 (de) 2007-05-26 2007-05-26 Gewerbliche Geschirrspülmaschine

Publications (3)

Publication Number Publication Date
EP1997420A2 EP1997420A2 (fr) 2008-12-03
EP1997420A3 EP1997420A3 (fr) 2009-03-18
EP1997420B1 true EP1997420B1 (fr) 2011-09-28

Family

ID=39708818

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08156113A Active EP1997420B1 (fr) 2007-05-26 2008-05-13 Lave vaisselle industriel

Country Status (5)

Country Link
US (1) US8394204B2 (fr)
EP (1) EP1997420B1 (fr)
CN (1) CN101366619B (fr)
CA (1) CA2632296C (fr)
DE (2) DE202007018745U1 (fr)

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DE102007024799A1 (de) 2008-11-27
US20080289655A1 (en) 2008-11-27
CA2632296A1 (fr) 2008-11-26
CN101366619B (zh) 2014-01-29
CN101366619A (zh) 2009-02-18
EP1997420A3 (fr) 2009-03-18
US8394204B2 (en) 2013-03-12
DE202007018745U1 (de) 2009-03-12
CA2632296C (fr) 2011-03-15
EP1997420A2 (fr) 2008-12-03

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