EP0374009A1 - Verfahren und Maschine zum Spülen von Geschirr - Google Patents

Verfahren und Maschine zum Spülen von Geschirr Download PDF

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Publication number
EP0374009A1
EP0374009A1 EP89403382A EP89403382A EP0374009A1 EP 0374009 A1 EP0374009 A1 EP 0374009A1 EP 89403382 A EP89403382 A EP 89403382A EP 89403382 A EP89403382 A EP 89403382A EP 0374009 A1 EP0374009 A1 EP 0374009A1
Authority
EP
European Patent Office
Prior art keywords
dishes
soiling
liquid
washing
microfilter
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.)
Granted
Application number
EP89403382A
Other languages
English (en)
French (fr)
Other versions
EP0374009B1 (de
Inventor
Jean-Claude Geay
Laurent Didier
Emile Delavaud
Camille Barbier
Benoit Gailledrat
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.)
Esswein SA
Original Assignee
Esswein SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9373037&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0374009(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Esswein SA filed Critical Esswein SA
Publication of EP0374009A1 publication Critical patent/EP0374009A1/de
Application granted granted Critical
Publication of EP0374009B1 publication Critical patent/EP0374009B1/de
Anticipated expiration legal-status Critical
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
    • A47L15/4202—Water filter means or strainers
    • A47L15/4208—Arrangements to prevent clogging of the filters, e.g. self-cleaning
    • 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
    • A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity

Definitions

  • the present invention relates to a dishwashing method and a dishwasher implementing this method.
  • Known dishwashers usually include a choice of several preset operating programs, for example a program for fragile or delicate dishes, a program for lightly soiled dishes, a program for very dirty dishes.
  • the result of washing dishes in these devices depends on the accuracy of the estimation of their degree of soiling and the choice of the operating program.
  • some known dishwashers include, apart from filtering large and medium soiling, a microfiltration of small dirt particles which often soil washed and rinsed dishes.
  • a microfiltration of the dirt is accompanied by brief and spaced emptying or microdraining through their microfilter, which cleans or rids the latter of the dirt accumulated on its surface. This microfiltration and these micro-drains are prefixed in the preset operating programs of these known dishwashers.
  • the degree of contamination of the microfilter is found to be low during the operation of the dishwasher, which generally corresponds to lightly soiled dishes, and if the operating program chosen is a program intended for heavily soiled dishes, the result of washing these dishes is satisfactory but at the price of an undeniable waste of water and energy because a washing of lightly soiled dishes does not require the same duration and the same number of washing and rinsing baths provided in an operating program for very dirty dishes.
  • the present invention aims to avoid these drawbacks, relates to a dishwashing method which allows not only to identify the degree of soiling of the dishes to unclog the microfilter but to change the current operating program against another program better adapted to the identified degree of soiling of the dishes in order to automatically obtain an excellent washing result and a better cost.
  • the invention also relates to a dishwasher implementing this method.
  • a process for washing dishes in a dishwasher provided with a heated and recycled washing or rinsing liquid, the soiling of which is retained by filters and / or microfilters is characterized in that it comprises on the one hand an identification of the degree of soiling of the dishes by means of the physical data of the washing or rinsing liquid at the level of the microfiltration and / or filtering, such as pressures, entered at the level of the filters and / or microfilters soiling, and liquid flows through the microfilters during the course of an operating program, and on the other hand a change in this operating program depending on the degree of soiling identified dishes.
  • a dishwasher 1 illustrated in FIG. 1 comprises an interior tank 2 and an exterior bodywork 3.
  • a lower dish basket 4 In the tank 2 are mounted a lower dish basket 4, an upper dish basket 5, a bottom watering reel 6, a upper watering reel 7.
  • a recycling pump 11 provided with a pipe for guiding the discharged water 12 towards the lower watering reel 6 , a drain pump having two directions of rotation 17, an inlet manifold 18 of the drain pump 17, a discharge pipe 19 with non-return valve 21 of the drain pump 17, a large and medium filter dirt 15, and a microfilter of small dirt particles 16 provided with a communication line 20 with the inlet manifold 18 of the drain pump 17.
  • the washing or rinsing liquid is heated by electrical resistors 8 mounted near the bottom 10 of the tank 2.
  • electrical resistors 8 mounted near the bottom 10 of the tank 2.
  • the other members and accessories of the dishwasher 1 being of known types are not shown.
  • the recycling pump 11 rotates and sends washing or rinsing liquid to the watering reels 6 and 7 which spray the dishes stored in the baskets 4 and 5.
  • the liquid, loaded of dirt and falling from the dishes, passes through the filter 15 which retains large and medium soils, before being admitted back into the recycling pump 11 and start a new cycle.
  • the drain pump 17 rotates in a direction known as the microfiltration direction, sucks in parallel with the recycling pump 11, liquid filtered by the filter 15 which is still charged with small particles of dirt, and discharges it into the collector.
  • inlet 18 where part of the current of this liquid enters the communication line 20 passes through the microfilter 16 and returns to the part of the tank 2 located above the filter 15, and the rest of the current of this liquid, guided through the inlet manifold 18, passes through the filter 15 and also returns to the part of the tank 2 located above this filter 15.
  • the microfilter 16 retains small particles of dirt and clarifies the liquid as and when wash or rinse.
  • the amount of dirt retained by the filters 15 and microfilters 16 represents the degree of soiling of the dishes.
  • the fouling of the filter 15 and of the microfilter 16 has the effect of reducing the respective flow of liquid through these filters and microfilters, an increase in the pressure of the liquid, in particular at the level of the microfilter.
  • the pressure and / or the flow rate of the washing or rinsing liquid at these filters 15 and / or microfilters 16 clearly reflect the degree of soiling of the dishes.
  • a method of washing the dishes in a dishwasher provided with a heated and recycled washing liquid, the soiling of which is retained by filters and / or microfilters comprises on the one hand an identification of the degree of soiling of the dishes by means of the physical data of the washing or rinsing liquid at the level of the microfiltration and / or filtering such as liquid pressures entered at the level of these filters and / or microfilters, and flow of liquid through microfilters during the course of an operating program, and on the other hand, a change of this operating program in function the degree of soiling identified from the dishes
  • An operating program of a preset dishwasher for a given degree of soiling of the dishes usually comprises a washing cycle and a rinsing cycle possibly preceded by a prewash cycle and the number of baths, the temperatures of the baths , and the duration of the baths are prefixed.
  • the operation of the dishwasher automatically changes and conforms to a preset program for a given degree of soiling of the dishes which corresponds to this identified degree. soiled dishes.
  • the operating program may include a prewash cycle, and in general in the washing and rinsing cycles, a relatively large number of baths, high bath temperatures (within limits allowed) and long bathing times.
  • the operating program may not include a prewash cycle, and in general in the washing and rinsing cycles, a relatively small number of baths, low bath temperatures and short bath times.
  • microvrains short and spaced drainings of the microfilter 16 known as microvrains are preset in the operating program and carried out by a rotation of the drain pump 17 in a direction called the direction of draining where the liquid being in the collector inlet 18, is sucked by the pump 17 and discharged outside, through the discharge pipe 19.
  • a vacuum is then created in the microfilter 16, and a current of washing liquid passes through the microfilter 16, the tank 2 towards the inlet manifold 18, peels off the small particles of dirt deposited on the surface of the microfilter 16 and entrains them into the drain pump 17 which discharges them to the outside.
  • the washing method comprises a single identification of the degree of soiling of the dishes in a start of an operating program of the dishwasher 1 and a single change of this program as a function of the degree of soiling identified from the dishes.
  • the washing method comprises an identification of the degree of soiling of the dishes in several baths of the operating program, and a successive change of this operating program of the dishwasher, depending successive degrees of soiling identified from the dishes.
  • the operation of the dishwasher is constantly optimal and adapted to the degree of soiling of the dishes.
  • the washing method comprises an identification of the degree of soiling of the dishes in several baths of the operating program, and a change of this operating program of the dishwasher as a function of the degree of soiling of the dishes identified in the last of these baths.
  • the dishwasher implementing the method of the invention comprises on the one hand, a sensor for physical data of the washing or rinsing liquid reflecting the degrees of soiling of the dishes 22, chosen among the pressure sensors and the flow sensors of the liquid current at the level of the filters 15 and / or microfilters 16, and on the other hand, a programmer 24 comprising several preset operating programs respectively for degrees of soiling of the dishes situated within preset limits, and triggering the execution of one of these preset operating programs, that which corresponds to the data of soiled of the dishes entered by sensor 22.
  • the pressure sensors and the flow sensors serving to constitute the data sensor translating the degrees of soiling of the dishes 22, and the programmer 24 being devices of known types, are not described in detail below.
  • the drain pump 17 rotates in the direction known as the drain direction, the washing or rinsing liquid is sucked both through the microfilter 16 and the filter 15 in the collector inlet 18 and discharged by the pump 17 outwardly through the discharge line 19.
  • a predetermined quantity of washing or rinsing liquid is lost. In this quantity of washing or rinsing liquid lost, only part of it ensures cleaning or unclogging the microfilter 16 and the remainder of this quantity of liquid is discharged at a pure loss.
  • the space housing the pipe 20 and leading to the microfilter 16 is separated from the space leading to the filter. 15 by a passage control device 26 which closes the passage during a microfiltration of dirt through the microfilter 16 and during a micro-drain in order to limit the loss of liquid to the only quantity of liquid which passes through the microfilter 16 to clean it.
  • the passage control device 26 is chosen from solenoid valves, valve devices controlled by a relay such as an electromagnetic relay, a thermal relay and equivalent devices of known types. performing the same function.
  • the dishwasher 1 comprises, apart from similar elements indicated by the same reference numbers as those represented in the example of FIG. 1, a drain pump 30 rotating in one direction which, during a drain, draws washing or rinsing liquid through the microfilter 16 and a well 36 of the filter 15, in the inlet manifold 18, discharges it and discharges it outside through a drain line 31 with non-return valve 32.
  • part of the liquid discharged by the recycling pump 11 is captured by a bypass line 33 in the collector inlet 18 to be directed into the microfilter 16 for a microfiltration of dirt, the valve 26 being closed, the bypass line 33 being connected to the water guide line 12 of the pump 11 or directly to a point not represent felt from the pump housing on the discharge side of the pump 11.
  • a liquid pressure limiting valve 35 is mounted in the inlet manifold 18 and adjusts an opening of the valve to a pressure value lower than a height of a predetermined column of liquid retained in a drain pipe 31 to avoid any liquid overflow through this drain pipe 31 during microfiltration of dirt and any excess pressure damaging the microfilter 16 and the washing efficiency.
  • the passage control device 26 is closed during a microfiltration of the dirt in order to orient all the liquid collected towards the microfilter 16, and during a microdrain through the microfilter 16 to avoid any unnecessary loss of the liquid, and open during a draining of the dishwasher in order to quickly evacuate from the tank 2, washing or rinsing liquid, part of which passes through the microfilter 16 to clean or unclog it.

Landscapes

  • Washing And Drying Of Tableware (AREA)
EP19890403382 1988-12-16 1989-12-06 Verfahren und Maschine zum Spülen von Geschirr Revoked EP0374009B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8816623 1988-12-16
FR8816623A FR2640489B1 (fr) 1988-12-16 1988-12-16 Procede de lavage de la vaisselle et lave-vaisselle mettant en oeuvre ce procede

Publications (2)

Publication Number Publication Date
EP0374009A1 true EP0374009A1 (de) 1990-06-20
EP0374009B1 EP0374009B1 (de) 1994-06-08

Family

ID=9373037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890403382 Revoked EP0374009B1 (de) 1988-12-16 1989-12-06 Verfahren und Maschine zum Spülen von Geschirr

Country Status (4)

Country Link
EP (1) EP0374009B1 (de)
DE (1) DE68915972T2 (de)
ES (1) ES2054066T3 (de)
FR (1) FR2640489B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514279A1 (de) * 1991-05-17 1992-11-19 Esswein S.A. Mit Mikrofilter ausgestattete Waschmaschine
EP0569733A1 (de) * 1992-05-12 1993-11-18 AEG Hausgeräte GmbH Geschirrspülmaschine
GB2272454A (en) * 1992-11-13 1994-05-18 Marconi Gec Ltd Cleaning process controlled in accordance with the density and/or viscosity of the cleaning fluid
EP0925754A2 (de) * 1997-12-23 1999-06-30 Whirlpool Corporation Automatische Heizungssteuerung für eine Geschirrspülmaschine
EP1929925A2 (de) * 2006-12-04 2008-06-11 Samsung Electronics Co., Ltd. Waschsteuervorrichtung und -verfahren einer Geschirrspülmaschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2213217A1 (de) 2009-01-29 2010-08-04 Electrolux Home Products Corporation N.V. Geschirrspüler und Verfahren zum Reinigen eines Filters, der zwischen einem Zuber und einem Sammelbehälter eines Geschirrspülers vorgesehen ist

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673441A (en) * 1982-10-18 1987-06-16 Meyers Theodore F Dishwashing method
EP0255863A2 (de) * 1986-08-04 1988-02-17 Licentia Patent-Verwaltungs-GmbH Geschirrspülmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673441A (en) * 1982-10-18 1987-06-16 Meyers Theodore F Dishwashing method
EP0255863A2 (de) * 1986-08-04 1988-02-17 Licentia Patent-Verwaltungs-GmbH Geschirrspülmaschine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514279A1 (de) * 1991-05-17 1992-11-19 Esswein S.A. Mit Mikrofilter ausgestattete Waschmaschine
FR2676348A1 (fr) * 1991-05-17 1992-11-20 Esswein Sa Lave-vaisselle muni d'un microfiltre.
EP0569733A1 (de) * 1992-05-12 1993-11-18 AEG Hausgeräte GmbH Geschirrspülmaschine
GB2272454A (en) * 1992-11-13 1994-05-18 Marconi Gec Ltd Cleaning process controlled in accordance with the density and/or viscosity of the cleaning fluid
EP0925754A2 (de) * 1997-12-23 1999-06-30 Whirlpool Corporation Automatische Heizungssteuerung für eine Geschirrspülmaschine
EP0925754A3 (de) * 1997-12-23 1999-10-20 Whirlpool Corporation Automatische Heizungssteuerung für eine Geschirrspülmaschine
EP1929925A2 (de) * 2006-12-04 2008-06-11 Samsung Electronics Co., Ltd. Waschsteuervorrichtung und -verfahren einer Geschirrspülmaschine
EP1929925A3 (de) * 2006-12-04 2009-04-15 Samsung Electronics Co., Ltd. Waschsteuervorrichtung und -verfahren einer Geschirrspülmaschine

Also Published As

Publication number Publication date
EP0374009B1 (de) 1994-06-08
DE68915972T2 (de) 1994-09-22
FR2640489B1 (fr) 1994-06-03
ES2054066T3 (es) 1994-08-01
FR2640489A1 (fr) 1990-06-22
DE68915972D1 (de) 1994-07-14

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