EP1004266B1 - Dishwasher provided with a preheating cycle - Google Patents

Dishwasher provided with a preheating cycle Download PDF

Info

Publication number: EP1004266B1
Authority: EP; European Patent Office
Prior art keywords: pump; water; duct; dishwasher according; washing
Prior art date: 1998-10-28
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.): Expired - Lifetime

Application number

EP99830669A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP1004266A1 (en

Inventor

Roberto Bertazzoni

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.)

Smeg SpA

Original Assignee

Smeg 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.)

1998-10-28

Filing date

1999-10-25

Publication date

2002-12-18

1999-10-25 Application filed by Smeg SpA filed Critical Smeg SpA

2000-05-31 Publication of EP1004266A1 publication Critical patent/EP1004266A1/en

2002-12-18 Application granted granted Critical

2002-12-18 Publication of EP1004266B1 publication Critical patent/EP1004266B1/en

2019-10-25 Anticipated expiration legal-status Critical

Status Expired - Lifetime 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
- A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
- A47L15/4219—Water recirculation
- 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

Definitions

the present invention relates to dishwashing machines, and in particular to a dishwasher for domestic use provided with means to carry out a pre-heating cycle.
the preferred arrangement is that of heating the water directly in the dishwasher at the beginning of the washing cycle, and then again during the cycle in order to keep the water at the required temperature.
the initial heating step contributes to the prolonging of the overall duration of the cycle which sometimes the user might wish to shorten, e.g. in order to have the clean dishes available sooner and/or to be able to carry out sooner the washing of another load of dishes.
Some types of dishwasher allow to shorten the length of the washing cycle by carrying out a pre-heating cycle prior to the loading of the dishes.
the dishwasher when the dishwasher is still empty, the water is loaded and initially heated by activating the washing pump and sprinkling the water through the sprinklers until the desired temperature is reached.
the dishwasher indicates to the user that the water has reached the set temperature, then he can load the dishes and start the real washing cycle.
the object of the present invention is to provide a dishwasher suitable to overcome the above-mentioned drawbacks.
a first fundamental advantage of the dishwasher according to the present invention is that it carries out the pre-heating cycle in a shorter time and with a lower consumption of water and electric power.
a second significant advantage of this dishwasher is that it restricts to the tank bottom the spread of hot water, whereby the user does not run any risk of burning himself and can easily load the dishwasher as soon as the pre-heating cycle is over.
a further advantage of this restricted spread of the heated water is the greater "thermal inertia" of the machine, which reduces the decrease in temperature of the water in case the user does not immediately start the washing cycle. In this way, there is a reduction in the waste of energy caused by the need to re-heat the water if the user lets it cool down for some time.
a dishwasher conventionally includes a washing pump P connected through a first duct C1 to the upper sprinkler U and through a second duct C2 to the lower sprinkler L.
the water reaches pump P through a third duct C3 coming from the collecting chamber R formed on the bottom of the tank, a first heating member H1 being spiral-wound around said supply duct C3.
One or more further heating members may be provided, for example, in the form of an immersed heater H2 or a contact heater H3 arranged behind a wall of the tank.
the temperature of the water is detected in chamber R by a sensor S connected to a control unit (not shown) which provides the deactivation of the heating member(s) when the water reaches the set temperature.
the novel aspect of the dishwasher according to the present invention consists of a pair of valves V1, V2 arranged so as to respectively close ducts C1, C2, and of a recirculation duct F branching out from duct C2 (upstream from valve V2) and terminating into chamber R. Also duct F may be closed by a valve VF, if present, which however is not used during the pre-heating step.
the dishwasher loads the pre-established amount of water while valves V1 and V2 interrupt the delivery to the upper U and lower L sprinklers, respectively.
the pump P is activated together with the heating member H1, whereby the water is heated by circulating only in the lower portion of the dishwasher between pump P and chamber R through ducts F and C3.
the control unit deactivates pump P and heater H1 and sends out an optical and/or acoustic signal of "machine ready".
pump P and heater H1 are activated again to take the water back to the set temperature.
valves V1 and V2 are deactivated through a double opening/closing cycle so as to prevent a thermal shock to the other parts of the machine not affected by the pre-heating.
valves V1, V2 are not immediately opened and left open, but they are firstly opened a couple of times for a few seconds and then closed again, before the final opening lasting for the whole washing cycle when, on the contrary, valve VF, if present, is closed.
the above-described and illustrated embodiment of the dishwasher according to the invention is just an example susceptible of various modifications.
the illustrated embodiment there are provided two valves V1, V2 since pump P has two separate deliveries for the two sprinklers U, L, but it is clear that in case of a single-delivery pump with subsequent branching of ducts C1, C2, F a single three-way valve controlling the delivery to the three ducts C1, C2 and F would be sufficient.
the heating of the water may be carried out by a heater placed in a different location with respect to the illustrated heater H1, e.g. a heater in chamber R or on duct F, or by more than one heater.

Landscapes

Engineering & Computer Science (AREA)
Water Supply & Treatment (AREA)
Washing And Drying Of Tableware (AREA)
Detergent Compositions (AREA)

EP99830669A 1998-10-28 1999-10-25 Dishwasher provided with a preheating cycle Expired - Lifetime EP1004266B1 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
ITMI982305		1998-10-28
IT1998MI002305A IT1303258B1 (it)	1998-10-28	1998-10-28	Lavastoviglie con ciclo di pre-riscaldamento.

Publications (2)

Publication Number	Publication Date
EP1004266A1 EP1004266A1 (en)	2000-05-31
EP1004266B1 true EP1004266B1 (en)	2002-12-18

Family

ID=11380947

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP99830669A Expired - Lifetime EP1004266B1 (en)	1998-10-28	1999-10-25	Dishwasher provided with a preheating cycle

Country Status (4)

Country	Link
EP (1)	EP1004266B1 (it)
DE (1)	DE69904559T2 (it)
ES (1)	ES2190639T3 (it)
IT (1)	IT1303258B1 (it)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1352605A1 (en) *	2002-04-02	2003-10-15	Bonferraro S.p.A.	Dishwasher with means for short-cycle operation and relevant operating cycle
EP1586265A1 (en) *	2004-01-29	2005-10-19	Bonferraro S.p.A.	Dishwasher with improved hydraulic circuit
EP1738677B1 (de) *	2006-06-23	2008-08-06	V-Zug AG	Geschirrspüler mit Dampfgenerator und Verfahren zu dessen Betrieb
ITTO20070347A1 (it)	2007-05-16	2008-11-17	Premark Feg Llc	Pompa a doppia mandata per un elettrodomestico, ed elettrodomestico munito della stessa
DE102008043557A1 (de)	2008-11-07	2010-05-12	BSH Bosch und Siemens Hausgeräte GmbH	Verfahren zum Betreiben einer Geschirrspülmaschine
DE102009029185A1 (de) *	2009-09-03	2011-03-10	BSH Bosch und Siemens Hausgeräte GmbH	Geschirrspülmaschine mit Vorratsbehälter sowie zugehöriges Vorheizverfahren
IT1398885B1 (it)	2010-03-02	2013-03-21	Indesit Co Spa	Metodo e macchina per il trattamento di stoviglie
ITTO20120165A1 (it)	2012-02-24	2013-08-25	Premark Feg Llc	Pompa a doppia mandata e macchina lavastoviglie provvista di tale pompa
CN106618420B (zh) *	2016-12-05	2024-02-09	宁波吉艾诺节能科技有限公司	一种商用洗碗机
EP3833157A1 (en) *	2019-12-05	2021-06-09	Whirlpool Corporation	Household appliance with immersible heater
US11696370B2 (en) *	2020-04-22	2023-07-04	Whirlpool Corporation	Household appliance with immersible heater

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE497149C (de) *	1928-09-26	1930-05-03	Houben Werke Akt Ges	Umsteuervorrichtung fuer Geschirrspuelmaschinen
IT1183898B (it) *	1985-06-21	1987-10-22	Eltek Spa	Macchina lavatrice quale lavastoviglie dotata di motore elettrico unico monodirezionale per le funzioni di lavaggio e scarico dell'acqua
IT1280477B1 (it) *	1995-11-10	1998-01-20	Merloni Elettrodomestici Spa	Macchina lavastoviglie con possibilita' di lavaggio differenziato
DE19652233C2 (de) *	1996-12-16	1998-11-26	Whirlpool Co	Geschirrspülmaschine mit einem unteren und einem oberen Sprüharm sowie einer Umwälzpumpe für das Spülwasser

1998
- 1998-10-28 IT IT1998MI002305A patent/IT1303258B1/it active IP Right Grant
1999
- 1999-10-25 ES ES99830669T patent/ES2190639T3/es not_active Expired - Lifetime
- 1999-10-25 DE DE69904559T patent/DE69904559T2/de not_active Expired - Fee Related
- 1999-10-25 EP EP99830669A patent/EP1004266B1/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
ITMI982305A0 (it)	1998-10-28
ES2190639T3 (es)	2003-08-01
EP1004266A1 (en)	2000-05-31
DE69904559T2 (de)	2003-11-20
ITMI982305A1 (it)	2000-04-28
IT1303258B1 (it)	2000-11-06
DE69904559D1 (de)	2003-01-30

Publication	Publication Date	Title
EP1004266B1 (en)	2002-12-18	Dishwasher provided with a preheating cycle
US9295369B2 (en)	2016-03-29	Dishwasher having circulation circuits
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CA2657728C (en)	2013-10-08	Warewasher including heat recovery system with hot water supplement
US20110114126A1 (en)	2011-05-19	Rinsing method for a water-bearing domestic appliance, especially dishwasher
US5792276A (en)	1998-08-11	Method and apparatus for controlling a dishwasher
RU2018108873A (ru)	2019-09-16	Посудомоечная машина и способ очистки
EP1352605A1 (en)	2003-10-15	Dishwasher with means for short-cycle operation and relevant operating cycle
AU2016245768B2 (en)	2019-02-14	Conveyor dishwasher and method for operating a conveyor dishwasher
US6582198B2 (en)	2003-06-24	Control strategy for a thermally activated diverter valve used in a washing appliance
US11369247B2 (en)	2022-06-28	Ware washing machine with heat pump and modulating valve
DE10259062B4 (de)	2023-01-19	Geschirrspülmaschine mit energiesparendem Heizmodus, sowie Verfahren hierzu
CN211749414U (zh)	2020-10-27	一种适用于洗碗机的水路系统
WO2012028710A1 (en)	2012-03-08	Dishwasher and method for operating a dishwasher
EP2220988A2 (en)	2010-08-25	Controlling method of a dishwasher
AU2016246463B2 (en)	2018-06-14	Conveyor dishwasher and method for operating a conveyor dishwasher
EP4059409B1 (en)	2023-11-08	A dishwasher providing heat recovery
EP2156780A2 (en)	2010-02-24	Dishwasher and controlling method of the same
JP2007075249A (ja)	2007-03-29	食器洗い機
JP3338621B2 (ja)	2002-10-28	洗浄機
EP3143920B1 (en)	2018-05-16	Industrial dishwasher with heat-recovery system
JP3334203B2 (ja)	2002-10-15	食器洗い乾燥機
JP5260154B2 (ja)	2013-08-14	蒸気排出装置
JP2981050B2 (ja)	1999-11-22	食器洗浄機
JP3066240B2 (ja)	2000-07-17	食器洗浄乾燥機

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