WO2012083485A1 - Système de lave-vaisselle écologique et méthodologie - Google Patents

Système de lave-vaisselle écologique et méthodologie Download PDF

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Publication number
WO2012083485A1
WO2012083485A1 PCT/CN2010/002105 CN2010002105W WO2012083485A1 WO 2012083485 A1 WO2012083485 A1 WO 2012083485A1 CN 2010002105 W CN2010002105 W CN 2010002105W WO 2012083485 A1 WO2012083485 A1 WO 2012083485A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
filtration system
dishwasher
wash
filter
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.)
Ceased
Application number
PCT/CN2010/002105
Other languages
English (en)
Inventor
Ramasamy Thiyagarajan
Ronald Scott TARR
Hai Yang
Paul Mathew
Chen Wang
Mahesh Kumar ASATI
Hui Lei
Zijun Xia
Nikhil Subhashchandra Tambe
Srinivasan Duraiswamy
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to PCT/CN2010/002105 priority Critical patent/WO2012083485A1/fr
Priority to US13/990,082 priority patent/US20130263892A1/en
Publication of WO2012083485A1 publication Critical patent/WO2012083485A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • 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
    • A47L15/4236—Arrangements to sterilize or disinfect dishes or washing liquids
    • A47L15/4238—Arrangements to sterilize or disinfect dishes or washing liquids by using electrolytic cells
    • 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
    • A47L15/0005—Rinsing phases, e.g. pre-rinsing, intermediate rinsing, final rinsing
    • 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
    • A47L15/0007—Washing phases
    • 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
    • A47L15/0026—Rinsing phases
    • 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
    • A47L15/0028—Washing phases
    • 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
    • A47L15/0039—Filter cleaning phases
    • 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
    • A47L2601/06—Electrolysed water

Definitions

  • the present subject matter relates to dishwashers. More specifically, the present subject matter relates to dishwashers and methods for operating such with reduced water and energy consumption and without requiring the use of detergent.
  • the present subject matter relates to apparatus and methodologies for providing and operating a dishwasher unit (herein after described as an eco- dishwasher) that is designed and operated in such a manner so as to consume significantly less water and electrical energy than previously known devices while at the same time performing an effective cleaning operation without requiring the use of
  • a dishwasher unit herein after described as an eco- dishwasher
  • an eco-dishwasher constructed in accordance with present technology may use only approximately 3.6 gallons of water and approximately 0.94 kWh of electrical energy with no detergent consumption for an exemplary heavily soiled ten place setting dish load.
  • the present technology relates to a dishwasher that includes a main cabinet configured to hold items to be washed.
  • An electrolysis system is configured to generate acidic and alkaline water from a water supply.
  • the dishwasher includes an acidic water storage tank, an alkaline water storage tank, a sedimentation filtration system, an oil filtration system, and a controller.
  • the controller is configured to cause the dishwasher to perform a plurality of pre-wash cycles using fresh water from a tap or previously stored final rinse water filtered through the sedimentation filtration system and the oil filtration systems following each pre-wash cycle or fresh tap water, to perform a wash cycle using alkaline water, to perform a rinse cycle using acidic water, to perform a final rinse cycle using water from a water supply, and to store the final rinse water in the alkaline water storage tank upon completion of the rinse cycle for use in subsequent pre-wash cycles or to drain the final rinse water without storing.
  • the sedimentation filtration system has a first filter having a first mesh size and a second filter having a second mesh size.
  • the first mesh size may be from about 100 microns to about 1 mm and the second mesh size may be between about 5 to 100 microns.
  • the oil filtration system comprises a filter made of material having hydrophobic and oleophilic surface characteristics that in certain embodiments may correspond to a filter made of kapok.
  • the dishwasher controller may cause a filtration process to be performed by causing water used for the plurality of pre-wash cycles to be reverse flushed through the sedimentation filtration system and the oil filtration system to regenerate the filtration systems.
  • the controller may be further configured to cause the filtration process to be performed between pre-wash cycles,
  • a heater may be positioned within the main cabinet or the dishwasher sump to heat the wash and final rinse cycle water.
  • a drain is provided to drain stored previous final rinse water if a subsequent pre-wash cycle is not begun within a predetermined period of time.
  • the present subject matter also relates to methods for operating a dishwasher to wash items placed in the main cabinet of the dishwasher.
  • the method includes electrolyzing water to generate acidic and alkaline watery, and storing the alkaline water in a first storage tank and storing the acidic water in a second storage tank.
  • a sedimentation filtration system and an oil filtration system are provided.
  • the method includes performing a plurality of pre-wash cycles using previous final rinse water, filtering the water through the sedimentation filtration system and the oil filtration systems, performing a wash cycle using alkaline water, performing a rise cycle using acidic water, performing a final rinse cycle using water from a water supply, and draining the final rinse water into one of a storage tank for use in subsequent pre-wash cycles or from the dishwasher.
  • FIG. 1 is a block diagram of a electrolysis, detergent free washing system in accordance with present technology
  • FIG. 2 is diagrammatic illustration of an electrolysis cell
  • FIG. 3 is diagrammatic illustration of an electrolysis system design
  • Fig. 4 is a graphical representation of exemplary Base and Acid liquid generation results in accordance with present technology
  • Fig. 5 is a block diagram representing pre- wash, filtration, and
  • Fig. 6 is a flow chart illustrating steps in an exemplary dishwashing cycle per present technology.
  • Fig. 7 is a schematic representation of relationships among various components of an exemplary dishwashing system per present technology.
  • a full-scale eco-dishwasher unit constructed in accordance with present technology is designed to operate using only approximately 3.6 gallons of water, approximately 0.94 kWh of electrical energy, and no detergent consumption. These values are not, however, limitations of the invention.
  • electrolysis, detergent-free washing system 100 uses alkaline wash technology wherein hydroxyl ions are generated at the point of use and worked in place of detergents.
  • An electrochemical compartment 102 is designed such that direct water splitting generates hydroxyl ions. More particularly, electrolysis system 102 is configured to split water supplied from, for example, a tap water supply 104, and to store the split water in an acid storage tank 132 and a base storage tank 134.
  • electrolysis system 102 is configured to split water supplied from, for example, a tap water supply 104, and to store the split water in an acid storage tank 132 and a base storage tank 134.
  • about two fill volumes of water is converted into about one fill volume of relatively acidic liquid and one fill volume of relatively basic liquid.
  • a fill volume may correspond to about 1.2 gallons of water.
  • electrolysis cells 202, 204, 206, 208 form an electrolysis system 200 that, as a voltage supply is coupled between anode electrode 210 and cathode electrode 212, converts water supplied to electrolysis cells 202, 204, 206, 208 into acid and base ionized liquids for storage in chambers 232, 234, respectively.
  • Anion and cation exchange membranes 222, 224, 226 are used to separate and transport protons and hydroxyl ions to the acid and base chambers 232, 234.
  • an alkaline dish wash liquid having a pH of about 11 and an acidic rinse having a pH range of about 2.5 to 4 may be employed.
  • the acidic rinse not only assists in managing scaling and filming (spotting) on the dishes but also on the dishwasher hydraulic system.
  • An acidic rinse also acts as a sanitization agent in the dishwashing operation.
  • water from the tap is introduced into acid and base tanks 332, 334, respectively, of electrolysis system 300 with about one fill volume of water in each tank for a total of about two fill volumes. Once the tanks have been filled with the required amount of water, the electrolysis process starts.
  • an exemplary electrolysis cell 200 may include two inlets and two outlets with one set, i.e., one inlet and one outlet, provided for base and another one for acid generation.
  • Tanks 232, 234, 332, 334 are connected to the electrolysis cell through independent pumps and particle filters 342, 344 to remove solid particles from water to avoid clogging of electrolysis cell.
  • pumps 342, 344 may be configured for operation at 12 VDC. It will be appreciated by those of ordinary skill in the art that pumps operating at other voltages may also be used.
  • a power supply (not separately illustrated) coupled to the electrodes 210, 212 of the electrolysis cell is provided and may correspond in an exemplary configuration to a 12 VDC supply. Again, it should be appreciated that other voltage levels may be used. Power is supplied simultaneously to the pumps and electrolysis cell, and the electrolysis process starts. As generally illustrated in Fig. 4, the pH level 444 of water in base tank 334 slowly increases and the pH level 442 in acid tank 332 decreases. Once the required level of pH is achieved, the process stops. As generally indicated on Fig. 4, this process may require from about twenty to thirty minutes to complete. During the main wash cycle, water from base (alkaline) tank 334 is used for washing the dishes while during one of the rinse cycle, water from acid tank 332 is used as an acid rinse.
  • the soil separation system 502 includes two filtration or separation portions: a sediment- water separation portion 504 and an oil-water separation portion 506.
  • a 150 micron ( ⁇ ) filter 510 and a 5 ⁇ filter 512 are used to remove sediments from used pre-wash water.
  • 150-micron filter 510 may correspond to a nylon mesh filter which effectively removes loose food particles from used water.
  • 5 ⁇ filter 512 removes particle size of 5-micron and above and helps to prevent clogging of Kapok filter 514 which corresponds to the previously noted oil-water separation portion 506.
  • Kapok filter 514 helps to filter oil from water. Ultra and/or nano filtration can also be added to the sediment filtration to obtain cleaner water for re-cycling.
  • Kapok is a natural material that comes from the Kapok tree, also known as Ceiba pentandra, Ceiba, or Silk Cotton Tree and has hydrophobic and oleophilic surface characteristics. The surface characteristic of the kapok fiber helps to retain oils while permitting water to pass, thereby producing the desired separation of oil from water.
  • Each of the filters 510, 512, 514 may be regenerated via reverse flushing at the end of each cycle to prepare them for the next cycle. This process can be effectively sed in various applications where there are suspended particles, oil and grease contaminations which need to be separated and flush to the drain system.
  • controller 700 there is representatively illustrated a controller 700. Further, the schematic representation of the dishwasher system illustrated in Fig. 7 illustrates a number of connecting lines that generally represent tubes or piping configured to provide fluid flow paths. The various illustrated valves VI - V9 and pumps PI - P5 are controlled by controller 700 to direct fluid flow within the dishwasher. Those of ordinary skill in the art will appreciate that controller 700 may take on various forms including, for example but not limited to, a timer motor driven switching mechanism, a computer operated controller, a microprocessor, or other electro-mechanical device.
  • valves VI - V9 it will be readily apparent to those of ordinary skill in the art that certain of these valves, for example V2, V6, and V8 are configured to simply be open or closed to block or permit fluid flow. Others of the valves, for example VI, V3, V4, V5, and V6 may be operated to block or direct fluid flow in different flow paths. These paths will be readily apparent to those of ordinary skill in the art in conjunction with the following operational description.
  • the dishwashing cycle begins with a water fill 602 from base tank 1 (Fig. 7) or fresh water from a tap into Main Tank 704. Water from base tank 1 corresponds to water saved from previous rinse water. A first pre-wash 604 starts and at the same time tap water from source 702 is sent to electrolysis cell 706 at step 606. An electrolysis cycle begins at step 608 after about 2.4 gallons of water is introduced into electrolysis cell 706.
  • the first pre-wash cycle ends and a sediment and oil filtration step begins.
  • water from the first pre-wash is recycled with the help of filtration system including filters 710, 712, 714 and the same water is used for a second pre-wash starting at step 612.
  • Pre-wash stops at step 614 and again the pre- wash water is filtered by filters 710, 712, 714 and used again a third pre-wash at step 616 and yet another filtering at step 618 when the third pre-wash is stopped.
  • these three pre-wash cycles including filtration and reuse of the water provide a saving of 2/3 of pre-wash water consumption.
  • the main (alkaline) wash is started (step 628) using water from Base tank 1.
  • a heater within dishwasher cabinet 704 is turned on to heat the wash water to about 130°F.
  • the alkaline wash is stopped at step 630 and a sediment filtration process starts using 5 and 150-micron filters 712, 710 to circulate the water from Base tank 1 through cabinet 704.
  • the used alkaline water is moved to base tank 1 (step 632) and acid water is added to cabinet main sump 704 (step 634) from acid tank 2 to start an acid rinse cycle (step 636).
  • used acid water is moved from main sump 704 to acid tank 2 (step 638) and the alkaline water previously moved in step 632 to base tank 1 is sent (step 640) to main sump 704 and base tank 1 is acid flushed (step 642) with water from acid tank 2.
  • Acid sediment filtration flushing (step 644) is then performed by pumping water from acid tank 2 through base tank 1 and 5 and 150-micron filters 712, 710 to drain 708. Kapok filter 714 is then spun by a spin motor 716 (step 646) and drained into drain 708 along with alkaline water. Tap water from source 702 is then sent to main sump 704 (step 648) in preparation for a final rinse at step 650. during the final rinse, the heater within main sump 704 is controlled to operate at about 150°F . Upon completion of the final rinse, the rinse water in main tank 704 is moved to base tank 1 for storage or drained out of the dishwasher and the wash cycle ends (step 654).

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

Abstract

L'invention porte sur un appareil de lave-vaisselle et sur une méthodologie pour laver de la vaisselle à l'aide d'eau électrolysée afin de produire de l'eau alcaline et acide pour des cycles de lavage et de rinçage. L'eau utilisée au commencement d'une étape de prélavage est utilisée de façon répétée dans plusieurs cycles de prélavage et est filtrée par une filtration à sédiments et à huile entre les cycles de prélavage. De l'eau venant d'un cycle de rinçage final est conservée pour l'utilisation pour de futurs cycles de prélavage. Le filtre de filtration à sédiments et à huile est rincé en sens inverse pour régénérer les systèmes de filtration.
PCT/CN2010/002105 2010-12-21 2010-12-21 Système de lave-vaisselle écologique et méthodologie Ceased WO2012083485A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2010/002105 WO2012083485A1 (fr) 2010-12-21 2010-12-21 Système de lave-vaisselle écologique et méthodologie
US13/990,082 US20130263892A1 (en) 2010-12-21 2010-12-21 Eco-dishwasher system and methodology

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2010/002105 WO2012083485A1 (fr) 2010-12-21 2010-12-21 Système de lave-vaisselle écologique et méthodologie

Publications (1)

Publication Number Publication Date
WO2012083485A1 true WO2012083485A1 (fr) 2012-06-28

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WO (1) WO2012083485A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130020240A1 (en) * 2011-07-20 2013-01-24 Paul Matthew Device and implementation for filtering oil from water in an appliance
EP2976980A1 (fr) * 2014-07-21 2016-01-27 LG Electronics Inc. Procédé de commande de lave-vaisselle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11485647B2 (en) 2019-05-23 2022-11-01 Bsh Home Appliances Corporation Changeable water filter in combination with a mixing valve for pretreatment of water in a home appliance and method of pretreating water

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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
JPH09108159A (ja) * 1995-10-24 1997-04-28 Taniguchi Kogyo Kk 食器類の洗浄方法および装置
CN1897860A (zh) * 2003-12-23 2007-01-17 Bsh博施及西门子家用器具有限公司 采用可选择泵运行的餐具洗涤机

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IT233540Y1 (it) * 1994-07-04 2000-01-28 Candy Spa Dispositivo per il recupero e la conservazione del liquido di lavaggio in macchine lavastoviglie,lavabiancheria e simili
US5779812A (en) * 1995-08-25 1998-07-14 Whirlpool Corporation Multi-mesh mechanical filter screen system for dishwashers
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US6010621A (en) * 1998-03-11 2000-01-04 Pattee; Harley J. Oil filter for absorbing free oil from laundry water
JP2003079560A (ja) * 2001-09-13 2003-03-18 Matsushita Electric Ind Co Ltd 食器洗浄機
US20030213505A1 (en) * 2002-05-17 2003-11-20 Price Kenneth Nathan Energy-efficient automatic dishwashing appliances

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPH09108159A (ja) * 1995-10-24 1997-04-28 Taniguchi Kogyo Kk 食器類の洗浄方法および装置
CN1897860A (zh) * 2003-12-23 2007-01-17 Bsh博施及西门子家用器具有限公司 采用可选择泵运行的餐具洗涤机

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130020240A1 (en) * 2011-07-20 2013-01-24 Paul Matthew Device and implementation for filtering oil from water in an appliance
US9114337B2 (en) * 2011-07-20 2015-08-25 General Electric Company Device and implementation for filtering oil from water in an appliance
EP2976980A1 (fr) * 2014-07-21 2016-01-27 LG Electronics Inc. Procédé de commande de lave-vaisselle

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