EP2042073B1 - Verfahren zum Betreiben eines gewerblichen Geschirrspülers - Google Patents

Verfahren zum Betreiben eines gewerblichen Geschirrspülers Download PDF

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Publication number
EP2042073B1
EP2042073B1 EP07425601A EP07425601A EP2042073B1 EP 2042073 B1 EP2042073 B1 EP 2042073B1 EP 07425601 A EP07425601 A EP 07425601A EP 07425601 A EP07425601 A EP 07425601A EP 2042073 B1 EP2042073 B1 EP 2042073B1
Authority
EP
European Patent Office
Prior art keywords
rinse
operating cycle
wash
heater
cycle according
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
EP07425601A
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English (en)
French (fr)
Other versions
EP2042073A1 (de
Inventor
Ezio Gobbi
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.)
Bonferraro SpA
Original Assignee
Bonferraro SpA
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 Bonferraro SpA filed Critical Bonferraro SpA
Priority to EP07425601A priority Critical patent/EP2042073B1/de
Priority to DE602007001244T priority patent/DE602007001244D1/de
Priority to ES07425601T priority patent/ES2327876T3/es
Priority to AT07425601T priority patent/ATE432649T1/de
Publication of EP2042073A1 publication Critical patent/EP2042073A1/de
Application granted granted Critical
Publication of EP2042073B1 publication Critical patent/EP2042073B1/de
Active legal-status Critical Current
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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
    • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
    • 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
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/02—Pressurised cleaning liquid delivered by a pump

Definitions

  • the present invention relates to industrial dishwashers, and in particular to an operating cycle aimed at achieving a sanification effect on the dishes.
  • the rinse water is pre-heated in the heater to 80-85°C
  • the dishes are arranged at a significant mutual distance to allow an optimal wash from both above and bellow
  • the wash sprinklers have a high flow rate and pressure and there is provided a single wash rack.
  • Examples of industrial dishwashers with double wash/rinse circuits and heater are disclosed in EP 0547011 and US 4872466 . All these features make industrial dishwashers very effective at washing dishes and the like, but they are not intended to guarantee that the dishes reach and maintain a certain temperature, given that performing a fast cycle has always been a priority.
  • the object of the present invention is to provide an operating cycle for an industrial dishwasher which overcomes said drawbacks.
  • This object is achieved by means of a cycle according to independent claim 1, including one or more additions of hot water coming from the heater during the wash phase, as well as a final waiting phase after the rinse prior to giving the "cycle end" signal and allowing to open the dishwasher door.
  • the main advantage of the operating cycle according to the present invention is that of reaching the required sanification threshold without resorting to too high wash or rinse temperatures, and without excessively extending the cycle length.
  • a further advantage of this cycle stems from the fact that its implementation does not require any additional component with respect to those conventionally already present in dishwashers.
  • an industrial dishwasher conventionally includes a dish rack 1, in which dishes are washed by upper and lower wash sprinklers 2 and 3, respectively, fed by a wash pump 4.
  • the rinse is carried out by switching on the rinse pump 5 that draws water at about 85°C from heater 6 and feeds it to the upper and lower rinse sprinklers 7 and 8, respectively.
  • An amount of water equal to that introduced in the tank by the rinse pump 5 is drained by a drain pump 9 before, during or after the rinse.
  • the conventional cycle includes only one wash phase W lasting 210", performed substantially at the constant temperature of 55°C reached at the beginning of the cycle due to the cooling caused by the cold dishes, followed by a rinse phase R lasting 30" that takes the temperature to a maximum of 67°C.
  • the novel aspect of the present cycle resides in the addition of at least one short heating phase H that overlaps the wash phase W, and of a final sanification phase S that follows the rinse phase R.
  • the heating phase H is carried out by switching on for a short time, indicatively 5-20" most preferably 10", the rinse pump 5 so as to load into the tank a certain amount of water at 85°C coming from heater 6, indicatively about 2 liters, after a certain time from the cycle start and preferably about halfway through the wash phase W.
  • the rinse pump 5 so as to load into the tank a certain amount of water at 85°C coming from heater 6, indicatively about 2 liters, after a certain time from the cycle start and preferably about halfway through the wash phase W.
  • the sanification phase S is carried out by imposing a delay of 80-100", preferably 90", in giving the "cycle end" signal. In fact, even taking into account the downward tolerances in detecting the temperatures in the tank and in heater 6, there is the guarantee that the dishes temperature is never below 69,5°C at which temperature about 85 seconds are sufficient to reach the 3600 HUE threshold (and there is also a contribution of the rinse phase R to reaching said threshold).
  • heating phase H Another possibility is that of dividing the heating phase H into a plurality of short-length loading phases, for example five "pulses" lasting 2 seconds each. This is particularly advantageous when the introduction of water from heater 6 to the tank is performed by means of the network pressure rather than by a rinse pump 5 as illustrated above.
  • the colder water entering heater 6, typically at 50-60°C from a hot water network does not have the time to mix with the water at 85°C already present in heater 6 whereby there is no difference in the addition of heat to the tank with respect to the use of the rinse pump 5.
  • the division into pulses allows to quickly restore the water temperature in heater 6 after each pulse, since the amount of colder water introduced into heater 6 is minimal. Therefore it is also possible to distribute the heating phase H in a more homogeneous manner along the wash phase W, since it is sufficient that the last pulse occurs in time for restoring the temperature in heater 6 prior to the rinse phase R.
  • the duration of the sanification phase S may be decreased by increasing the temperature at the end of the rinse phase R, which can be achieved through the increase in one or more of the following parameters: temperature at the beginning of the wash phase W, temperature increase during the heating phase H and temperature increase during the rinse phase R.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (10)

  1. Arbeitsablaufverfahren für einen Industriegeschirrspüler mit einer Tür, die einen Waschbehälter verschließt, der mit einem Heizwiderstand versehen ist und zum Aufnehmen eines Gestells (1) geeignet ist, in dem das Geschirr von oberen und unteren Waschsprenklern (2,3), die von einer Waschpumpe (4) versorgt werden, gewaschen wird und dann von oberen und unteren Spülsprenklern (7,8), die mit heißem Wasser aus einem Heizelement (6) versorgt werden, abgespült wird, wobei das Ablaufverfahren die folgenden Schritte umfasst:
    a) Anschalten der Waschpumpe (4);
    b) Betreiben der Waschpumpe (4) für eine vorgegebene Zeitdauer;
    c) Abschalten der Waschpumpe (4);
    d) Anschalten der Versorgung der Spülsprenkler (7,8);
    e) Versorgen der Spülsprenkler (7,8) für eine vorgegebene Zeitdauer;
    f) Abschalten der Versorgung der Spülsprenkler (7,8);
    g) Abgeben eines "Ende des Arbeitsablaufs"-Signals und Entriegeln der Geschirrspülertür;
    gekennzeichnet dadurch, dass es ferner die folgenden Schritte umfasst:
    b') Zuführen von heißem Wasser aus dem Heizelement (6) in den Behälter während Schritt b);
    b") Wiederherstellen der Anfangsbedingungen im Heizelement (6) vor Schritt b);
    f') Desinfizieren des Geschirrs während einer Wartephase zwischen den Schritten f) und g).
  2. Arbeitsablaufverfahren nach Anspruch 1, gekennzeichnet dadurch, dass Schritt b') mittels einer einzigen Zuführung ungefähr in der Mitte von Schritt b) ausgeführt wird.
  3. Arbeitsablaufverfahren nach Anspruch 1, gekennzeichnet dadurch, dass Schritt b') in mehrere über Schritt b) hinweg verteilte Zuführungspulse aufgeteilt ist.
  4. Arbeitsablaufverfahren nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass Schritt b') zwischen 5" und 20", vorzugsweise 10", dauert.
  5. Arbeitsablaufverfahren nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass die Temperatur im Behälter zu Beginn von Schritt d) ungefähr 60°C ist.
  6. Arbeitsablaufverfahren nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass die Temperatur im Behälter zu Beginn von Schritt f') ungefähr 71°C ist.
  7. Arbeitsablaufverfahren nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass Schritt f') zwischen 80" und 100", vorzugsweise 90", dauert.
  8. Arbeitsablaufverfahren nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass Schritt b') durch Anschalten einer Spülpumpe (5) ausgeführt wird.
  9. Arbeitsablaufverfahren nach einem der Ansprüche 1 bis 7, gekennzeichnet dadurch, dass Schritt b') durch Betreiben eines Elektroventils ausgeführt wird, das die Einführung von Wasser mit 50-60°C aus einem Heißwassernetz in das Heizelement (6) steuert.
  10. Arbeitsablaufverfahren nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass das im Behälter vorhandene Heizelement während Schritt b) angeschaltet wird.
EP07425601A 2007-09-28 2007-09-28 Verfahren zum Betreiben eines gewerblichen Geschirrspülers Active EP2042073B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP07425601A EP2042073B1 (de) 2007-09-28 2007-09-28 Verfahren zum Betreiben eines gewerblichen Geschirrspülers
DE602007001244T DE602007001244D1 (de) 2007-09-28 2007-09-28 Verfahren zum Betreiben eines gewerblichen Geschirrspülers
ES07425601T ES2327876T3 (es) 2007-09-28 2007-09-28 Ciclo de funcionamiento para lavavajillas industrial.
AT07425601T ATE432649T1 (de) 2007-09-28 2007-09-28 Verfahren zum betreiben eines gewerblichen geschirrspülers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07425601A EP2042073B1 (de) 2007-09-28 2007-09-28 Verfahren zum Betreiben eines gewerblichen Geschirrspülers

Publications (2)

Publication Number Publication Date
EP2042073A1 EP2042073A1 (de) 2009-04-01
EP2042073B1 true EP2042073B1 (de) 2009-06-03

Family

ID=39046793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07425601A Active EP2042073B1 (de) 2007-09-28 2007-09-28 Verfahren zum Betreiben eines gewerblichen Geschirrspülers

Country Status (4)

Country Link
EP (1) EP2042073B1 (de)
AT (1) ATE432649T1 (de)
DE (1) DE602007001244D1 (de)
ES (1) ES2327876T3 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2263512B2 (de) 2009-06-17 2019-01-09 Bonferraro S.p.A. Haubenartiger industrieller Geschirrspüler mit verbesserter Filteranordnung
IT201900010245A1 (it) * 2019-06-27 2020-12-27 Silanos S R L Sistema di risciacquo per macchine lavastoviglie, e macchina lavastoviglie comprendente tale sistema di risciacquo.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439242A (en) * 1980-05-15 1984-03-27 Hobart Corporation Low hot water volume warewasher
US4810306A (en) * 1986-02-26 1989-03-07 The Stero Company Low energy, low water consumption warewasher and method
IT1252886B (it) * 1991-12-11 1995-07-04 Procedimento di lavaggio per una macchina lavastoviglie di tipo industriale e macchina lavastoviglie relativa
US6615850B1 (en) * 1999-09-10 2003-09-09 General Electric Company Dishwasher sanitation cycle
US7104269B2 (en) * 2000-12-08 2006-09-12 Appliance Scientific, Inc. Residential dishwasher
DE102004048091A1 (de) * 2004-09-30 2006-04-06 Meiko Maschinenbau Gmbh & Co. Kg Geschirrspülmaschine mit thermischer Nachbehandlung

Also Published As

Publication number Publication date
DE602007001244D1 (de) 2009-07-16
ES2327876T3 (es) 2009-11-04
EP2042073A1 (de) 2009-04-01
ATE432649T1 (de) 2009-06-15

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