ITMI940270A1 - PROCEDURE TO OPERATE A DOMESTIC DISHWASHER - Google Patents
PROCEDURE TO OPERATE A DOMESTIC DISHWASHER Download PDFInfo
- Publication number
- ITMI940270A1 ITMI940270A1 IT000270A ITMI940270A ITMI940270A1 IT MI940270 A1 ITMI940270 A1 IT MI940270A1 IT 000270 A IT000270 A IT 000270A IT MI940270 A ITMI940270 A IT MI940270A IT MI940270 A1 ITMI940270 A1 IT MI940270A1
- Authority
- IT
- Italy
- Prior art keywords
- concentrate
- rinsing
- rinsing liquid
- permeate
- liquid
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 11
- 239000007788 liquid Substances 0.000 claims description 25
- 239000012141 concentrate Substances 0.000 claims description 18
- 239000012466 permeate Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000001223 reverse osmosis Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 description 5
- 239000003599 detergent Substances 0.000 description 4
- 239000013505 freshwater Substances 0.000 description 4
- 239000013043 chemical agent Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
- A47L15/0023—Water filling
-
- 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
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0055—Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Vending Machines For Individual Products (AREA)
- Cleaning By Liquid Or Steam (AREA)
Description
DE SC R IZ ION E DESCRIPTION
L 1invenzione riguarda un procedimento per azionare , una lavastoviglie domestica con un programma di lavaggio selezionabile tra gli stadi "sciacquatura preliminare", "pulitura", "sciacquatura intermedia", "ultimo risciacquo" ed "asciugatura" e con un dispositivo di osmosi inversa nel quale l'acqua immessa viene convertita in una parte costituita da permeato e in una parte costituita da concentrato e il permeato viene impiegato come liquido di sciacquatura nella fase "ultimo risciacquo". The invention relates to a process for operating a domestic dishwasher with a washing program that can be selected from the stages "preliminary rinse", "cleaning", "intermediate rinse", "last rinse" and "drying" and with a reverse osmosis device in the which the water introduced is converted into a part consisting of permeate and a part consisting of concentrate and the permeate is used as a rinsing liquid in the "last rinse" phase.
Com'e noto, un dispositivo di osmosi inversa § un dispositivo|dotato di una membrana permeabile attraverso cui passa l'acqua,laddove 1 acqua che ha attraversato la membrana ======= il cosiddetto permeato, è completamente dissalata. Nella direzione di flusso, a monte della membrana, rimane una quantità d’acqua, il cosiddetto concentrato, in cui è sciolto il sale separato. As is known, a reverse osmosis device is a device equipped with a permeable membrane through which water passes, where the water that has passed through the membrane ======= the so-called permeate, is completely desalinated. In the direction of flow, upstream of the membrane, a quantity of water remains, the so-called concentrate, in which the separated salt is dissolved.
Attraverso la EP-05 01 33 677 è noto un procedimento del tipo indicato all’inizio nel quale il permeato prodotto con il dispositivo di osmosi inversa viene utilizzato per la fase "ultimo risciacquo" e restanti Through the EP-05 01 33 677 a procedure of the type indicated at the beginning is known in which the permeate produced with the reverse osmosis device is used for the "last rinse" phase and the remaining
le/fasi vengono esercite con acqua dolce d'acquedotto. Nel procedimento noto ========== conforme alla predetta EP-05 01 677 il concentrato, allorché ha raggiunto dopo varie operazioni di dissalazione una prestabilita concentrazione di sale, viene scaricato nella rete fognaria. the phases are carried out with fresh water from the aqueduct. In the known process ========== in accordance with the aforementioned EP-05 01 677 the concentrate, when it has reached a predetermined salt concentration after various desalination operations, is discharged into the sewer system.
Detto procedimento presenta l'inconveniente che un'aliquota dell'acqua dolce impiegata per far funzionare la lavastoviglie convenzionale, vale a dire il concentrato, viene scaricata praticamente senza essere stata utilizzata. Inoltre, quando viene fatto uso di acqua dolce dura nella fase "lavaggio", nella quale viene aggiunto in maniera convenzionale il detersivo, si rende necessario impiegare una quantità relativamente grande di detersivo, costituito solitamente da agenti chimici, poiché la sua azione diminuisce con l'aumentare della durezza dell'acqua in cui esso è disciolto. Said method has the drawback that an aliquot of the fresh water used to operate the conventional dishwasher, that is to say the concentrate, is drained practically without having been used. Furthermore, when hard soft water is used in the "washing" phase, in which the detergent is added in a conventional manner, it is necessary to use a relatively large quantity of detergent, usually consisting of chemical agents, since its action decreases with the increase in the hardness of the water in which it is dissolved.
Pertanto, scopo dell'invenzione è quello di perfezionare il procedimento illustrato alTinizio per azionare una lavastoviglie domestica in maniera tale che venga sfruttata l'intera quantità di liquido e che venga ridotta la quantità degli agenti chimici impiegati. Therefore, the object of the invention is to improve the process illustrated at the outset for operating a domestic dishwasher in such a way that the entire quantity of liquid is used and the quantity of the chemical agents used is reduced.
Secondo l'invenzione, il detto scopo viene conseguito impiegando a scelta, come liquido di sciacquatura, o il permeato o il concentrato in tutte le fasi del programma. According to the invention, the said object is achieved by using either the permeate or the concentrate as the rinsing liquid in all phases of the program.
Impiegando anche il concentrato come liquido di sciacquatura, si sfrutta l'intera quantità di acqua dolce introdotta e con ciò si evita l'evacuazione mediante pompaggio di un'aliquota inutilizzata della quantità di liquido caricata. poiché il permeato viene impiegato nella fase "lavaggio", si ottiene una sostanziale riduzione della quantità di agenti chimici impiegati e cioè della quantità di detersivo giacché, quando quest'ultimo viene disciolto in acqua dissalata, la sua azione migliora in misura sostanziale . By also using the concentrate as a rinsing liquid, the entire quantity of fresh water introduced is exploited and thus the evacuation by pumping of an unused portion of the quantity of liquid loaded is avoided. since the permeate is used in the "washing" phase, a substantial reduction is obtained in the quantity of chemical agents used, that is, in the quantity of detergent since, when the latter is dissolved in desalinated water, its action improves substantially.
Secondo una preferita peculiarità dell'invenzione, nelle fasi del programma attuate con liquido di sciacquatura freddo, come liquido di sciacquatura viene impiegato concentrato. According to a preferred peculiarity of the invention, in the program steps carried out with cold rinsing liquid, concentrate is used as rinsing liquid.
Impiegando concentrato come liquido di sciacquatura nelle fasi del programma attuate con liquido di sciacquatura freddo, si evita in maniera efficace di caricare gli elementi riscaldanti con depositi di sali o con prodotti di reazione degli stessi quali incrostazioni etc. By using concentrate as rinsing liquid in the program phases carried out with cold rinsing liquid, it is effectively avoided to load the heating elements with salt deposits or with reaction products of the same such as encrustations etc.
secondo un'ulteriore peculiarità dell'invenzione sia il permeato che il concentrato vengono accumulati e nelle varie fasi di impiego vengono erogati mediante un sistema di alimentazione. Gom'è noto, il trattamento dell'acqua dolce in un dispositivo di osmosi inversa richiede un tempo più lungo che non in altri dispositivi di trattamento dell'acqua come, ad esempio, un impianto di addolcimento con scambiatore di ioni. Pertanto, con il predetto accorgimento viene reso possibile eseguire per un tempo più lungo il trattamento d'acqua nell'impianto di osmosi inversa e immagazzinare sia il concentrato prodotto sia il permeato prodotto, ciò affinché nella corrispondente fase del programma in cui vi è bisogno di liquido di sciacquatura sia possibile richiamare una quantità sufficiente di liquido di sciacquatura. according to a further peculiarity of the invention both the permeate and the concentrate are accumulated and in the various phases of use they are delivered by means of a feeding system. As is known, the treatment of fresh water in a reverse osmosis device requires a longer time than in other water treatment devices such as, for example, a softening system with an ion exchanger. Therefore, with the aforementioned expedient it is made possible to carry out the water treatment in the reverse osmosis system for a longer time and to store both the product concentrate and the permeate produced, so that in the corresponding phase of the program in which there is a need for rinsing liquid it is possible to recall a sufficient quantity of rinsing liquid.
Secondo una preferita forma di attuazione della invenzione, il concentrato viene impiegato come liquido per sciacquare nella fase "sciacquatura preliminare". La fase "sciacquatura preliminare" è, come si sa, una delle fasi del programma in cui il liquido di sciacquatura non viene riscaldato. Nella fase "sciacquatura preliminare", dagli oggetti da lavare introdotti in una lavastoviglie per uso domestico si stacca principalmente lo sporco grossolano faciImente solubile, ciò avviene principalmente mediante la messa a contatto con un liquido, e la quantità di sali disciolti nel liquido con un aumento della concentrazione non ha nessuna influenza negativa. According to a preferred embodiment of the invention, the concentrate is used as a liquid for rinsing in the "preliminary rinsing" step. The "preliminary rinsing" phase is, as you know, one of the phases of the program in which the rinsing liquid is not heated. In the "preliminary rinsing" phase, the easily soluble coarse dirt mainly detaches from the objects to be washed placed in a dishwasher for domestic use, this occurs mainly through contact with a liquid, and the quantity of salts dissolved in the liquid with an increase concentration has no negative influence.
Secondo un’ulteriore forma di atttuazione della invenzione, il concentrato viene utilizzato come liquido di sciacquatura nella fase "sciacquatura intermedia". Come nella già menzionata fase "sciacquatura preliminare", nella fase "sciacquatura intermedia" il liquido di sciacquatura, come è noto, non viene riscaldato. Nelle lavatrici domestiche note la fase "sciacquatura intermedia" serve a rimuovere eventuali residui di detersivo, solitamente basici, rimasti attaccati agli oggetti da pulire che sono stati introdotti nella macchina e ciò affinché nella successiva fase di "ultimo risciacquo", ove venga aggiunto ..brillantante =================== che è solitamente acido, l'azione di tale brillantantenon venga neutralizzata. L'impiego di un liquido di riseiacquo ====== con aumentata concentrazione di sali, che sono chimicamente neutri, da un canto determina l'asportazione della liscivia e dall'altro agisce in maniera non negativa nella successiva fase di "ultimo risciacquo" nell'eventualità che si faccia uso di un brillantante. According to a further embodiment of the invention, the concentrate is used as a rinsing liquid in the "intermediate rinsing" step. As in the aforementioned "preliminary rinsing" step, in the "intermediate rinsing" step the rinsing liquid, as is known, is not heated. In known domestic washing machines, the "intermediate rinsing" phase is used to remove any residues of detergent, usually basic, remaining attached to the objects to be cleaned that have been introduced into the machine and this so that in the subsequent "last rinse" phase, where it is added. rinse aid =================== which is usually acid, the action of this rinse aid is not neutralized. The use of a rinse liquid ====== with an increased concentration of salts, which are chemically neutral, on the one hand determines the removal of the lye and, on the other hand, acts in a non-negative way in the subsequent "last rinse" phase "in the event that a rinse aid is used.
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4305020A DE4305020A1 (en) | 1993-02-18 | 1993-02-18 | Method of operating a domestic dishwashing machine |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI940270A0 ITMI940270A0 (en) | 1994-02-15 |
ITMI940270A1 true ITMI940270A1 (en) | 1995-08-15 |
IT1273771B IT1273771B (en) | 1997-07-10 |
Family
ID=6480803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITMI940270A IT1273771B (en) | 1993-02-18 | 1994-02-15 | PROCEDURE TO OPERATE A DOMESTIC DISHWASHER |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE4305020A1 (en) |
FR (1) | FR2701647B3 (en) |
IT (1) | IT1273771B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10352120A1 (en) * | 2003-11-04 | 2005-06-16 | Meiko Maschinenbau Gmbh & Co. Kg | Machine-integrated reverse osmosis device for dishwashers |
DE102008048491A1 (en) * | 2008-09-23 | 2010-04-01 | Meiko Maschinenbau Gmbh & Co.Kg | Dishwasher with low-temperature rinsing |
US7871521B2 (en) * | 2008-10-07 | 2011-01-18 | Ecolab Inc. | Zero waste reverse osmosis system and downstream rinsing |
DE102010011471A1 (en) * | 2010-03-15 | 2011-09-15 | Meiko Maschinenbau Gmbh & Co. Kg | Continuous dishwasher with improved rinse |
ITMI20130300A1 (en) * | 2013-02-28 | 2014-08-29 | Comenda Ali S P A | PERFORMED DISHWASHER MACHINE WITH DEMINERALIZED WATER FINAL RINSE |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1944397A1 (en) * | 1969-09-02 | 1971-03-11 | Bosch Hausgeraete Gmbh | Washing machine or dishwasher |
US4156621A (en) * | 1977-09-28 | 1979-05-29 | American Sterilizer Company | Regeneration of used dishwashing water without chemical additives for sanitizing and spot-free rinse uses |
FR2404420A1 (en) * | 1977-10-03 | 1979-04-27 | Mayer Albert | Treating water for use in dishwasher - by passing through filter and then a water-softener to remove calcium salts |
IT1164385B (en) * | 1983-08-05 | 1987-04-08 | Zanussi A Spa Industrie | PROCEDURE AND DEVICE FOR THE DEMINERALIZATION OF WATER FOR WASHING MACHINES |
DE3914940A1 (en) * | 1989-05-06 | 1990-11-08 | Guenter Lauer | Reverse osmosis purifies part of water supply for drinking - while remaining flow is used for less demanding domestic needs |
-
1993
- 1993-02-18 DE DE4305020A patent/DE4305020A1/en not_active Ceased
-
1994
- 1994-02-15 IT ITMI940270A patent/IT1273771B/en active IP Right Grant
- 1994-02-16 FR FR9401765A patent/FR2701647B3/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2701647A3 (en) | 1994-08-26 |
IT1273771B (en) | 1997-07-10 |
ITMI940270A0 (en) | 1994-02-15 |
DE4305020A1 (en) | 1994-08-25 |
FR2701647B3 (en) | 1995-02-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19970227 |