EP3095372B1 - Geschirrspüler mit effizientem heizsystem - Google Patents

Geschirrspüler mit effizientem heizsystem Download PDF

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Publication number
EP3095372B1
EP3095372B1 EP15168773.8A EP15168773A EP3095372B1 EP 3095372 B1 EP3095372 B1 EP 3095372B1 EP 15168773 A EP15168773 A EP 15168773A EP 3095372 B1 EP3095372 B1 EP 3095372B1
Authority
EP
European Patent Office
Prior art keywords
heating unit
tank
boiler
power level
dish washer
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.)
Revoked
Application number
EP15168773.8A
Other languages
English (en)
French (fr)
Other versions
EP3095372A1 (de
Inventor
Riccardo ORLANDI
Riccardo FABBRI
Norberto CEVOLONI
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=53191531&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3095372(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Priority to EP15168773.8A priority Critical patent/EP3095372B1/de
Publication of EP3095372A1 publication Critical patent/EP3095372A1/de
Application granted granted Critical
Publication of EP3095372B1 publication Critical patent/EP3095372B1/de
Revoked 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
    • A47L15/42—Details
    • A47L15/4285—Water-heater arrangements
    • 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
    • A47L15/4287—Temperature measuring or regulating arrangements
    • 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
    • A47L2501/06—Water heaters

Definitions

  • This invention relates to dish washers, preferably under-counter or hood type or conveyor dish washers.
  • dish washers preferably under-counter or hood type or conveyor dish washers.
  • power and current available from the power source there is a limitation in power and current available from the power source. In most countries of Europe the typical connection available is 400 V, 3 x 16 amps.
  • EP 1 835 837 a dish washer has multiple load elements that are assigned multiple power output levels for not exceeding the maximum electric total output.
  • EP 1 835 837 proposes to use exactly three power output levels for each load element. This simple configuration of circuitry was, according to EP 1 835 837 , particularly easy to implement and already had all the advantages.
  • a dish washer comprising
  • the object of the invention is also particularly achieved by a method for operating a dish washer comprising the steps:
  • the water in the tank heats the plates, increasing their temperature by some tenths °C. In this process the water gives heat to the plates and a significant part of this heat has to be reintegrated by the heating element in the tank, otherwise the temperature of the wash solution reaches a temperature not sufficient to achieve a good result, with the creation of foam, pump's cavitation, difficulties in drying, etc. This requires a high power heating unit in the tank.
  • the inventor however, has realized that running short cycles one after the other, especially with cold feed water, requires a high power especially in the boiler to achieve a sufficiently short recovery time, which should be shorter than the cycle time plus load/unload time, and therefore, for optimizing the cycle time it is sufficient to power the boiler heating unit at different power levels above zero, while the tank heating unit is powered at only one power level above zero.
  • a heating unit may include one or more heating elements (e.g. heating coil or other heat emitting element, whereby heat is converted from electric power).
  • the boiler/tank comprising the boiler/tank heating unit preferably means that the boiler/tank heating unit is dedicated to heat up the content of the boiler/tank.
  • the boiler heating unit and tank heating unit are different; however, they may share one or more common heating elements, preferably as long as they differ in at least one heating element.
  • the dish washer being configured to power the boiler heating unit at m different power levels above zero preferably means that the dish washer comprises a control unit which is configured (and provisioned/programmed) to set the boiler heating unit to different power levels, e.g. by switching between or switching on/off different heating elements and/or by adjusting the voltage/current (e.g. pulse-width-modulation or conventional voltage control) delivered to one or more heating elements of the boiler heating unit.
  • the term "powering" already implies that the according power level is above zero.
  • the dish washer being configured to power the tank heating unit at only one power level above zero preferably means that the dish washer does not contain any configuration/program for setting the tank heating units to other power levels than OFF and ON and does not contain any configuration/program to perform pulse-width modulation, whereas pulse-width modulation is preferably considered as having a pulse-frequency of less than 1s.
  • the power level above zero of the tank heating unit is equal to the difference between the highest power level and the second highest power level of the boiler heating unit.
  • the dish washer uses the available energy optimally.
  • the following configuration could be chosen:
  • the available boiler heating unit extra power is 2.1 kW (difference between highest and second highest power level).
  • the dish washer is configured to operate the tank heating unit and the boiler heating unit, such that the boiler heating unit is, preferably always, being switched to a power level lower than or equal to the second highest power level, when the tank heating unit is set to the power level above zero.
  • the tank heating unit and the boiler heating unit are operated accordingly.
  • the dish washer is very efficiently using the available power.
  • the boiler heating unit comprises two or more, preferably exactly two, heating elements and a switching unit, wherein the switching unit is configured to alternately switch between one of the heating elements and the tank heating unit, such that the one of the heating elements is interlocked with the tank heating unit.
  • a switching unit alternately switches between one heating element in a boiler and the tank heating unit.
  • a very simple control mechanism is achieved.
  • a dual level boiler heating unit e.g., 5.5 kW + 2.1 kW
  • a single level (e.g., 2.1 kW) tank heating unit are installed.
  • the switching unit e.g., relay(s)
  • the tank heating unit is interlocked with its equivalent power level or heating element in the boiler allowing for a continuous heating power in the boiler and a working time at maximum power strictly limited to the value needed to recover in the available time.
  • Fig. 1 shows a conceptual overview of a dish washer 1 according to the invention. It comprises a boiler 10 for storing and heating rinse water, wherein the boiler 10 comprises only one electric boiler heating unit 11.
  • the dish washer 1 further comprises a tank 20 for heating wash water, wherein the tank 20 comprises only one electric tank heating unit 21, wherein the dish washer 1 is configured to power the tank heating unit 21 at only one power level above zero 21.1.
  • the operation of the dish washer 1 comprises the steps:
  • the dish washer 1 is configured to operate the tank heating unit 21 and the boiler heating unit 11, such that the boiler heating unit 11 is being switched to a power level 11.2, 11.3 lower than or equal to the second highest power level 11.2, when the tank heating unit 21 is set to the power level 21.1 above zero.
  • Fig. 2 shows an overview based on Fig. 1 , whereby the power level 21.1 of the tank heating unit 21 is adapted to the power levels 11.1, 11.2, 11.3 of the boiler heating unit 11.
  • the power level above zero 21.1 of the tank heating unit 21 is equal to the difference between the highest power level 11.1 and the second highest power level 11.2 of the boiler heating unit 11.
  • the power level 11.1 is 7.6 kW
  • the power level 11.2 is 5.5 kW
  • the power level 21.1 is 2.1 kW.
  • Fig. 3 shows an overview based on Fig. 2 , whereas an even simpler solution is shown.
  • Fig. 4 shows an overview based on Fig. 3 , whereas a technical simple realization is chosen.
  • the boiler heating unit 11 comprises two heating elements 12.1, 12.2 and a switching unit 30, wherein the switching unit 30 is configured to alternately switch between the heating element 12.2 and the tank heating unit 21, which has a tank heating element 22.1, such that the heating element 12.2 is interlocked with the tank heating unit 21.
  • the boiler has two or more levels of power, individually selectable, and the tank has one level of power.
  • the tank has one level of power.

Claims (6)

  1. Geschirrspüler (1), umfassend:
    - einen Heizkessel (10) zum Aufbewahren und Heizen von Nachspülwasser, wobei der Heizkessel (10) nur eine elektrische Heizkesselheizeinheit (11) umfasst, wobei der Geschirrspüler (1) konfiguriert ist, um die Heizkesselheizeinheit (11) auf m verschiedenen Leistungsstufen über Null (11.1, 11.2, 11.3) mit Strom zu versorgen, wobei die m verschiedenen Leistungsstufen über Null (11.1, 11.2, 11.3) eine höchste Leistungsstufe (11.1) und eine zweithöchste Leistungsstufe (11.2) umfassen, und
    - einen Tank (20) zum Heizen von Spülwasser, wobei der Tank (20) nur eine elektrische Tankheizeinheit (21) umfasst,
    dadurch gekennzeichnet, dass der Geschirrspüler (1) konfiguriert ist, um die Tankheizeinheit (21) auf nur einer Leistungsstufe über Null (21.1) mit Strom zu versorgen.
  2. Geschirrspüler (1) nach Anspruch 1, wobei die Leistungsstufe über Null (21.1) der Tankheizeinheit (21) gleich der Differenz zwischen der höchsten Leistungsstufe (11.1) und der zweithöchsten Leistungsstufe (11.2) der Heizkesselheizeinheit (11) ist.
  3. Geschirrspüler (1) nach einem der vorhergehenden Ansprüche, wobei m = 2 ist.
  4. Geschirrspüler (1) nach einem der vorhergehenden Ansprüche, wobei der Geschirrspüler (1) konfiguriert ist, um die Tankheizeinheit (21) und die Heizkesselheizeinheit (11) so zu betreiben, dass die Heizkesselheizeinheit (11) auf eine Leistungsstufe (11.2, 11.3) geschaltet wird, die niedriger oder gleich der zweithöchsten Leistungsstufe (11.2) ist, wenn die Tankheizeinheit (21) auf die Leistungsstufe (21.1) über Null eingestellt wird.
  5. Geschirrspüler (1) nach Anspruch 4, wobei die Heizkesselheizeinheit (11) zwei oder mehr Heizelemente (12.1, 12.2) und eine Schalteinheit (30) umfasst, wobei die Schalteinheit (30) konfiguriert ist, um wechselweise zwischen einem der Heizelemente (12.1, 12.2) und der Tankheizeinheit (21) zu schalten, sodass das eine der Heizelemente (12.1, 12.2) mit der Tankheizeinheit (21) verzahnt ist.
  6. Verfahren zum Betreiben eines Geschirrspülers (1), das die folgenden Schritte umfasst:
    - Aufbewahren und Heizen von Nachspülwasser in einem Heizkessel (10) mithilfe nur einer elektrischen Heizkesselheizeinheit (11), wobei die Heizkesselheizeinheit (11) auf m verschiedenen Leistungsstufen über Null (11.1, 11.2, 11.3) mit Strom versorgt wird, wobei die m verschiedenen Leistungsstufen über Null (11.1, 11.2, 11.3) eine höchste Leistungsstufe (11.1) und eine zweithöchste Leistungsstufe (11.2) umfassen;
    - Heizen von Spülwasser in einem Tank (20) mithilfe nur einer elektrischen Tankheizeinheit (21),
    dadurch gekennzeichnet, dass die Tankheizeinheit (21) auf nur einer Leistungsstufe über Null (21.1) mit Strom versorgt wird.
EP15168773.8A 2015-05-21 2015-05-21 Geschirrspüler mit effizientem heizsystem Revoked EP3095372B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15168773.8A EP3095372B1 (de) 2015-05-21 2015-05-21 Geschirrspüler mit effizientem heizsystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15168773.8A EP3095372B1 (de) 2015-05-21 2015-05-21 Geschirrspüler mit effizientem heizsystem

Publications (2)

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EP3095372A1 EP3095372A1 (de) 2016-11-23
EP3095372B1 true EP3095372B1 (de) 2017-09-27

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020052332A1 (zh) * 2018-09-14 2020-03-19 佛山市顺德区美的洗涤电器制造有限公司 洗涤电器
CN111603122B (zh) * 2019-02-25 2023-09-01 佛山市顺德区美的洗涤电器制造有限公司 洗涤电器

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3186417A (en) 1962-11-27 1965-06-01 Waste King Corp Dishwasher heating system with dual electrical heating means
US4326551A (en) 1980-10-27 1982-04-27 Hobart Corporation Heat recovery system for a dishwasher
US20060174915A1 (en) 2005-02-09 2006-08-10 Maytag Corp. Rapid heat system for a multi-tub dishwasher
EP2074922A2 (de) 2007-12-27 2009-07-01 V-Zug AG Haushaltgerät, insbesondere Geschirrspüler, mit getaktetem Durchlauf-Erhitzer
EP2108299A2 (de) 2008-03-26 2009-10-14 MEIKO Maschinenbau GmbH & Co. KG Programmautomat mit Abwasserwärmerückgewinnung
EP1835837B1 (de) 2004-09-24 2009-10-28 MEIKO Maschinenbau GmbH & Co. KG Verfahren und anordnung zum energiesparenden betrieb von spülmaschinen
EP1793724B1 (de) 2004-09-30 2009-11-18 MEIKO Maschinenbau GmbH & Co. KG Geschirrsp]lmaschine mit thermischer nachbehandlung
DE102012024308A1 (de) 2012-12-12 2014-06-12 TERRAMARK Markencreation Gesellschaft mit beschränkter Haftung Spülmaschine zum Betrieb in unterschiedlichen Niederspannungsnetzen und Verfahren zum energiesparenden Betrieb einer Spülmaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7332041B2 (en) * 2000-12-08 2008-02-19 Appliance Scientific, Inc. Residential dishwasher
ITTO20040809A1 (it) * 2004-11-18 2005-02-18 Merloni Elettrodomestici Spa Macchina di lavaggio

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3186417A (en) 1962-11-27 1965-06-01 Waste King Corp Dishwasher heating system with dual electrical heating means
US4326551A (en) 1980-10-27 1982-04-27 Hobart Corporation Heat recovery system for a dishwasher
EP1835837B1 (de) 2004-09-24 2009-10-28 MEIKO Maschinenbau GmbH & Co. KG Verfahren und anordnung zum energiesparenden betrieb von spülmaschinen
EP1793724B1 (de) 2004-09-30 2009-11-18 MEIKO Maschinenbau GmbH & Co. KG Geschirrsp]lmaschine mit thermischer nachbehandlung
US20060174915A1 (en) 2005-02-09 2006-08-10 Maytag Corp. Rapid heat system for a multi-tub dishwasher
EP2074922A2 (de) 2007-12-27 2009-07-01 V-Zug AG Haushaltgerät, insbesondere Geschirrspüler, mit getaktetem Durchlauf-Erhitzer
EP2108299A2 (de) 2008-03-26 2009-10-14 MEIKO Maschinenbau GmbH & Co. KG Programmautomat mit Abwasserwärmerückgewinnung
DE102012024308A1 (de) 2012-12-12 2014-06-12 TERRAMARK Markencreation Gesellschaft mit beschränkter Haftung Spülmaschine zum Betrieb in unterschiedlichen Niederspannungsnetzen und Verfahren zum energiesparenden Betrieb einer Spülmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"die Vergleichsmessungen zu diversen Spülmaschinen der Reihe Ekumatic der Firma EKU-Metallbau zeigt", WEBSEITE DER FIRMA EKU-METALLBAU, 9 March 2001 (2001-03-09)

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