EP2545840B1 - Improved rinsing station for tunnel dishwashers, and a method for controlling such a rinsing station - Google Patents

Improved rinsing station for tunnel dishwashers, and a method for controlling such a rinsing station Download PDF

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Publication number
EP2545840B1
EP2545840B1 EP20120176449 EP12176449A EP2545840B1 EP 2545840 B1 EP2545840 B1 EP 2545840B1 EP 20120176449 EP20120176449 EP 20120176449 EP 12176449 A EP12176449 A EP 12176449A EP 2545840 B1 EP2545840 B1 EP 2545840B1
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EP
European Patent Office
Prior art keywords
rinsing
tank
net water
phase
solution
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
EP20120176449
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2545840A1 (en
Inventor
Luciano Berti
Marco Colombo
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.)
Ali Group SRL
Original Assignee
Comenda Ali SpA
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Filing date
Publication date
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Application filed by Comenda Ali SpA filed Critical Comenda Ali SpA
Publication of EP2545840A1 publication Critical patent/EP2545840A1/en
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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/24Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors
    • A47L15/241Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors the dishes moving in a horizontal plane
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/24Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors
    • A47L15/247Details specific to conveyor-type machines, e.g. curtains
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/42Details
    • A47L15/4291Recovery arrangements, e.g. for the recovery of energy or water

Definitions

  • the present invention refers to an improved rinsing station for tunnel machines and to a method for controlling such a station.
  • the present invention refers to a rinsing station that is capable of performing a preliminary pre-rinsing step before the final rinsing of the dishes.
  • the water that is used for the pre-rinsing to be, at least partially, the same water used in the preceding rinsing cycle.
  • Such a method of re-using water in the pre-rinsing step that was previously used for rinsing allows to significantly reduce the consumption of water from the net and, therefore, also the consumption related to energy, detergent and rinse aid.
  • Patent application WO10144307 indeed describes a tunnel machine of the type described above, or rather a machine that recycles the water previously used for rinsing in the pre-rinsing phase of the following cycle, in which it is further provided for sensors arranged actually inside the tank for collecting such water to be re-used.
  • such sensors are connected to a control unit which controls a possible increase of detergent in the washing phase, wherein said increase is a function of some parameters measured in the collection tank.
  • Prior art document DE102009032964 describes a machine provided with sensors for measuring the characteristics of the pre-rinsing solution that are capable of modifying the delivery of the net water according to the values measured by such sensors.
  • Prior art document EP2057929 describes on the other hand, a machine that is provided with sensors for measuring the characteristics of the net water that is capable of modifying the delivery of detergent according to the measured characteristics of the net water.
  • EP2057929 The purpose of such a document EP2057929 is therefore that of controlling the amount of detergent delivered and not that of reducing the delivery of net water.
  • the purpose of the present invention is that of making an improved rinsing station for tunnel machines and a method for controlling such a station that are capable of solving in a different manner with respect to the prior art the problems relative to decreasing the consumption of water in the rinsing station without jeopardising the overall efficiency of the washing cycle.
  • a tunnel dishwasher 100 is shown.
  • Such a machine 100 comprises at least one washing zone 11 that is provided with means 12, 13 for dispensing a liquid substance, generally water or water mixed with detergents, suitable for being dispensed under pressure on the dishes.
  • a liquid substance generally water or water mixed with detergents
  • the tunnel machine 100 also comprises a pre-washing station 20 and a rinsing station 21 inside which both the pre-rinsing phase, and the rinsing phase are performed.
  • the dishes to be washed go, in succession, through the pre-washing 20, washing 11 and rinsing 21 stations arranged on special transport means, such as conveyor belts or baskets.
  • the pre-washing 20 and washing 11 stations have a pre-washing tank 22, a washing tank 23, respectively, to which they are connected by at least one pump 24 and by a pump 14, respectively.
  • the rinsing station 21 is provided with a collection tank 30 of the water delivered by the nozzles 27 during the rinsing phase and intended to be used in the pre-rinsing phase during the following cycle.
  • a pump 31 connected to an upper transversal manifold arm 25 and a lower transversal manifold arm 26, each provided with a plurality of pre-rinsing spray nozzles 27'.
  • the nozzles 27 can coincide with the pre-rinsing nozzles 27', represented in a broken line in figure 2 .
  • cycle is used to indicate all the actions which are carried out in succession on the dishes from when they are introduced to when they come out from the machine.
  • cycle is not an actual cycle but rather a series of operations that are carried out in succession, in different work stations or modules, on moving dishes.
  • the rinsing station 21 comprises at least one boiler 33, or an equivalent means, for warming the water to be delivered during rinsing.
  • At least one solenoid valve 34 or a pump or equivalent means, for closing or opening the connection with the water network for supplying rinsing water.
  • the re-use of the water used for rinsing during the preceding cycle in the pre-rinsing phase allows to significantly reduce the consumption of rinsing water drawn from the network, and therefore also the consumption of the energy needed in order to heat it, and the amounts of rinse aid needed.
  • the first of the aforementioned measurements is obtained through detection sensors 101 of some properties of the solution contained in the tank 30, whereas to carry out the second measurement the system also provides means 105 for controlling the state of the net water in inlet so as to exclude, in such a way, variables due to the change over time of the characteristics of the net water 103.
  • control unit 102 which, once the data has been processed, controls actuators 104, or equivalent means, for adjusting the flow-rate of water delivered from the network 103 in the final rinsing phase.
  • the present invention makes it possible to calibrate with continuity each time the delivery of clean net water for rinsing, avoiding on one hand wastage and always ensuring a correct cleaning efficiency.
  • a measured value of the pre-rinsing solution does not necessarily correspond to a certain net water delivery value but the latter is calculated each time also as a function of the characteristics of the net water itself.
  • control unit 102 is connected to the sensors 101 and to the means 105 for controlling the state of the net water, which respectively foresee a measuring of some characteristics of the solution present in the tank 30 from the rinsing phase of the preceding cycle and the characteristics of the net water.
  • control unit 102 provides for processing both the measured values which are compared with predetermined reference values.
  • control unit 102 controls the actuators 104, adapting, cycle by cycle, the flow rate of water delivered from the net 103.
  • pH and/or conductivity and/or turbidity As quality indicators of the solution present in the tank 30, like those of the net water as well, one or more of the following parameters can be taken : pH and/or conductivity and/or turbidity.
  • the improved rinsing station for tunnel machines and the relative controlling method allow to reduce the consumption of net water in the rinsing phase without jeopardising the overall efficiency of the washing cycle, by calibrating the delivery of water from the network, cycle by cycle, according to indicating parameters of the quality of the net water and of the quality of the solution present in the tank 30 deriving from the rinsing of the preceding cycle and intended to be used in the pre-rinsing phase of the following cycle.
  • the improved rinsing station for tunnel machines of the present invention thus conceived can undergo numerous modifications and variants, all covered by the same inventive concept; moreover, all the details can be replaced by technically equivalent elements.
  • the materials used, as well as their dimensions, can be any according to the technical requirements.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP20120176449 2011-07-15 2012-07-13 Improved rinsing station for tunnel dishwashers, and a method for controlling such a rinsing station Active EP2545840B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001323A ITMI20111323A1 (it) 2011-07-15 2011-07-15 Stazione di risciacquo perfezionata per macchine lavastoviglie a tunnel, e metodo di comando di tale stazione di risciacquo

Publications (2)

Publication Number Publication Date
EP2545840A1 EP2545840A1 (en) 2013-01-16
EP2545840B1 true EP2545840B1 (en) 2014-03-12

Family

ID=44545816

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20120176449 Active EP2545840B1 (en) 2011-07-15 2012-07-13 Improved rinsing station for tunnel dishwashers, and a method for controlling such a rinsing station

Country Status (3)

Country Link
EP (1) EP2545840B1 (it)
ES (1) ES2471946T3 (it)
IT (1) ITMI20111323A1 (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013203933B4 (de) * 2013-03-07 2022-11-03 Meiko Maschinenbau Gmbh & Co. Kg Reinigungsvorrichtung und Verfahren zur Reinigung von Reinigungsgut

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69424409T2 (de) * 1994-06-09 2000-11-02 Whirlpool Europe B.V., Veldhoven Verfahren zum Optimieren der Wasserausnutzung in Waschmaschinen
DE102006005074A1 (de) 2006-02-03 2007-08-09 Premark Feg L.L.C., Wilmington Transportgeschirrspülmaschine
DE102006039434A1 (de) * 2006-08-23 2008-05-29 Meiko Maschinenbau Gmbh & Co. Kg Verfahren zur Beurteilung und Sicherstellung der thermischen Hygienewirkung in einer Mehrtankgeschirrspülmaschine
PL2057929T3 (pl) * 2007-11-07 2009-12-31 Electrolux Home Products Corp Nv Zmywarka do naczyń z pomiarem przewodności
DE102009024569A1 (de) 2009-06-08 2011-04-07 Premark Feg L.L.C., Wilmington Transportspülmaschine zum Spülen von Spülgut sowie Verfahren zum Betrieb einer derartigen Transportspülmaschine
DE102009032964A1 (de) * 2009-07-14 2011-03-03 Meiko Maschinenbau Gmbh & Co. Kg Verfahren zum Betrieb einer Mehrtankgeschirrspülmaschine

Also Published As

Publication number Publication date
ITMI20111323A1 (it) 2013-01-16
EP2545840A1 (en) 2013-01-16
ES2471946T3 (es) 2014-06-27

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