EP2576886B1 - Kühlgerät und verfahren für co2 waschmaschinen - Google Patents

Kühlgerät und verfahren für co2 waschmaschinen Download PDF

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Publication number
EP2576886B1
EP2576886B1 EP11723039.1A EP11723039A EP2576886B1 EP 2576886 B1 EP2576886 B1 EP 2576886B1 EP 11723039 A EP11723039 A EP 11723039A EP 2576886 B1 EP2576886 B1 EP 2576886B1
Authority
EP
European Patent Office
Prior art keywords
fluid
cooling
pressure
regulator
unit
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.)
Active
Application number
EP11723039.1A
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English (en)
French (fr)
Other versions
EP2576886A2 (de
Inventor
Ahmed Al Jassani
Håkan L. KARLSSON
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.)
Electrolux Laundry Systems Sweden AB
Original Assignee
Electrolux Laundry Systems Sweden AB
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Application filed by Electrolux Laundry Systems Sweden AB filed Critical Electrolux Laundry Systems Sweden AB
Publication of EP2576886A2 publication Critical patent/EP2576886A2/de
Application granted granted Critical
Publication of EP2576886B1 publication Critical patent/EP2576886B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D31/00—Other cooling or freezing apparatus
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F43/00—Dry-cleaning apparatus or methods using volatile solvents
    • D06F43/08—Associated apparatus for handling and recovering the solvents
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F43/00—Dry-cleaning apparatus or methods using volatile solvents
    • D06F43/08—Associated apparatus for handling and recovering the solvents
    • D06F43/081—Reclaiming or recovering the solvent from a mixture of solvent and contaminants, e.g. by distilling
    • D06F43/083—Condensing arrangements

Definitions

  • the present invention relates to dry cleaning systems namely washing machines using dry solvents such as carbon dioxide.
  • the present invention relates to a cooling device and method for cooling solvents being used in such systems.
  • EP0405941A2 discloses a system and a method for the additional recovering of solvents from a solvent cleaning process in which extraction means are connected to a chamber in which the cleaning process is performed to extract solvent from the chamber after the drying stage of the cleaning process, and means are provided for condensing the solvent from extracted flow and for returning the condensed solvent for re-use in a subsequent cleaning process.
  • a drawback with the prior art systems is that they use cooling arrangements such as plate heat-exchanger for cooling the fluids in the system.
  • This type of cooling device uses refrigerants, for example R404 refrigerant, which is not environmental friendly.
  • refrigerants for example R404 refrigerant
  • the use of this type or similar refrigerant is surrounded by governmental rules which therefore make it cumbersome to use.
  • Due to the low working temperatures of prior art system a further drawback is that the refrigerant needs to be cooled in order to have a cooling effect on the fluids in these systems.
  • an apparatus for cleaning articles comprising, a compressor unit for processing fluid, a regulator associated with the compressor unit, for increasing pressure of the fluid between the compressor unit and the regulator, characterised by a cooling unit arranged between the compressor unit and the regulator for cooling of the fluid.
  • the cooling unit for cooling the fluid can comprise a simpler solution compared to prior art. This is due to the increased pressure where the cooling unit is arranged.
  • the cooling unit comprises water as coolant.
  • the temperature of the water may be around room temperature such as around 20°C or above.
  • the water supply for the water used in the cooling unit as coolant can be taken directly from a duct, thereby water can be supplied on a need to have basis into the cooling unit.
  • the apparatus according to the invention may use a compressor unit comprising one, two or more compressor stages.
  • a compressor unit comprising one, two or more compressor stages.
  • the pressure after the compressor unit is about 70 bar or more.
  • the regulator may be any kind of device suitable to increase the pressure in the apparatus according to the invention.
  • it may comprise a back pressure valve or an expansion valve. It may also comprise a valve for a fixed pressure increase such as a fixed counter pressure valve.
  • Other solutions known to the person skilled in the art may also be used in order to increase the pressure in the arrangement according to the invention.
  • a method for cooling fluid being used as a solvent in a dry cleaning system comprising the steps of: compressing the fluid, regulating pressure of the fluid, characterised in that the method further comprising the step of cooling the compressed fluid.
  • the cooling step preferably comprises cooling the fluid with water as coolant.
  • water may be room tempered and directly supplied from a duct on a need to have basis.
  • the regulating step according to the invention preferably comprises the step of increasing the pressure. So that a higher pressure is build up in a certain part in the apparatus. In particular the pressure is increased where the cooling step takes place in the system, before the fluid is transferred to the storage device.
  • the method may further comprise a second cooling step comprising a pressure decrease.
  • a second cooling step comprising a pressure decrease.
  • Figure 1 shows a dry cleaning apparatus according to the present invention comprising a storage device 1, a compressor 2, a cooling unit 3, a cleaning chamber 4 for cleaning fabrics, a distiller 5, a refill tube 6 and a regulator 7.
  • the dry cleaning apparatus preferably uses carbon dioxide as solvent fluid which is stored in the storage device 1.
  • the fluid When a cleaning program is started the fluid is transferred via pipes to the cleaning chamber 4 in order to clean the articles that are present in the cleaning chamber 4.
  • the compressor unit 2 In order to have the fluid in the right phase where the cleaning effect is as effective as possible the compressor unit 2 builds up a pressure in the apparatus.
  • the compressor unit 2 does not necessarily directly influence what phase the fluid is in, within the cleaning chamber 4, during e.g. a cleaning process. This is dependent on the temperature and/or pressure in accordance with the ideal gas law or related laws. For example the temperature can be decided by the pressure or the other way around. Thus in some parts of the system the fluid may be in a liquid state or in a gas state or in both liquid and gas state, depending on the pressure and temperature.
  • the fluid Before the fluid is transferred to the storage device 1 after cleaning, the fluid is first distilled in the distiller 5 in order to remove contaminants from the fluid.
  • the fluid is heated so that it gasifies and thereby can be removed from the distiller 5 without the contaminants.
  • the fluid Before the fluid is transferred into the storage device 1 it has to be cooled in the cooling unit 3.
  • the pressure on the fluid has to be at a certain level so that the water provides a cooling effect on the fluid.
  • the pressure of the fluid passing the cooling unit is increased by a regulator 7 so that the temperature and pressure of the fluid is 35°C or more and 70 bar or higher.
  • Room tempered water is about 20°C or above, however it can also be cooler such as between 15°C - 20°C. As long as the water is cooler than the fluid it is supposed to cool, a cooling effect can be achieved. Thus this makes it possible to use water as coolant directly supplied from a duct. Thereby as long as the apparatus is connected to a water supply duct, coolant will always be present. Coolant can also be requested on a need to have basis automatically by the apparatus according to the invention.
  • the regulator 7 can either be of a variable active type that regulates the pressure independently of the pressure after the regulator 7.
  • the pressure before the regulator 7 is set to a fixed level (e.g. 70 bar) independently of the pressure after the regulator 7.
  • the delta( ⁇ ) value of the pressure before and after the regulator 7 is variable.
  • the regulator 7 may also be of a fixed type that ensures a fixed pressure difference, delta( ⁇ ) pressure, before and after the regulator 7, such as +5, +10 or +15 bar, based on the pressure after the regulator 7.
  • Figure 2 illustrates an embodiment according to the invention during evacuation of fluid from the cleaning chamber 4.
  • the compressor 2 evacuates the fluid, in gas phase, from the cleaning chamber 4 by building up the pressure after the compressor 2.
  • This is achieved by the regulator 7, thereby the fluid can be cooled by water in the cooling unit 3.
  • the regulator 7 regulates the pressure so that the pressure of the fluid is 70 bar or higher before the regulator and about 55-60 bar after the regulator 7.
  • Figure 3 illustrates the apparatus according to the invention during distillation activity.
  • gas is transferred from the distiller 5 via the compressor 2.
  • the compressor 2 increases the pressure of the fluid and thus also the temperature of the fluid.
  • the fluid is transferred via pipes through the distiller 5 in order to use the heat in the pressurised fluid to evaporate the fluid in the distiller 5.
  • the fluid is transferred to the cooling unit 3 for cooling and then transferred to the storage device 1 via the regulator 7. Since the pressure decreases after the regulator 7, a further temperature decrease is achieved when the fluid enters the storage device 1.
  • Figure 4 depict an apparatus according to the invention comprising a compressor unit 2 comprising two compressor stages.
  • Figure 5 shows a method according to the invention comprising a pressure increase step 8, a regulation step 9 wherein the pressure is regulated by the regulator 7 so that an increase of the pressure is achieved, and a cooling step 10 wherein the pressurized fluid is cooled by the cooling unit 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Detergent Compositions (AREA)

Claims (10)

  1. Trockenreinigungsvorrichtung zum Reinigen von Gegenständen unter Verwendung von Fluiden, die Folgendes umfasst:
    - eine Kompressoreinheit (2) zum Verarbeiten eines Fluids,
    - eine Speichereinheit (1) zum Speichern des Fluids;
    - eine Kühleinheit (3), die zwischen der Kompressoreinheit (2) und der Speichereinheit (1) angeordnet ist, um das Fluid zu kühlen,
    gekennzeichnet durch eine Regulierungseinrichtung (7) die der Kompressoreinheit (2) zugeordnet ist, wobei die Regulierungseinrichtung (7) dafür ausgelegt ist, den Drucks des Fluids vor der Speichereinheit (1) zu erhöhen, wobei die Kühleinheit (3) zwischen der Kompressoreinheit (2) und der Regulierungseinrichtung (7) angeordnet ist.
  2. Vorrichtung nach Anspruch 1, wobei die Kühleinheit (3) Wasser als Kühlmittel umfasst.
  3. Vorrichtung nach Anspruch 2, wobei die Temperatur des Wassers über 20 °C liegt.
  4. Vorrichtung nach einem der vorhergehenden Ansprüche, wobei die Kompressoreinheit (2) zwei oder mehr Kompressorstufen umfasst.
  5. Vorrichtung nach einem der vorhergehenden Ansprüche, wobei die Regulierungseinrichtung (7) ein Gegendruckventil umfasst.
  6. Vorrichtung nach Anspruch 1-4, wobei die Regulierungseinrichtung (7) ein Entspannungsventil umfasst.
  7. Vorrichtung nach Anspruch 1-4, wobei die Regulierungseinrichtung (7) ein Druckventil mit einem feststehenden Zähler umfasst.
  8. Verfahren zum Kühlen eines Fluids, das in einer Vorrichtung zum Reinigen von Gegenständen nach einem der Ansprüche 1-7 als Lösungsmittel verwendet wird, wobei das Verfahren die folgenden Schritte umfasst:
    - Komprimieren des Fluids,
    - gekennzeichnet durch das Regulieren des Drucks des Fluids durch Erhöhen des Drucks, wobei ein Kühlschritt erfolgt, bevor das Fluid zu einer Speichereinrichtung übertragen wird.
  9. Verfahren nach Anspruch 8, wobei der Kühlschritt das Kühlen des Fluids mit Wasser als Kühlmittel umfasst.
  10. Verfahren nach einem der Ansprüche 8-9, wobei das Verfahren ferner einen zweiten Kühlschritt umfasst, der eine Druckabsenkung umfasst.
EP11723039.1A 2010-05-28 2011-05-27 Kühlgerät und verfahren für co2 waschmaschinen Active EP2576886B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1000577 2010-05-28
PCT/EP2011/058708 WO2011147956A2 (en) 2010-05-28 2011-05-27 Cooling device and method therefore for co2 washing machines

Publications (2)

Publication Number Publication Date
EP2576886A2 EP2576886A2 (de) 2013-04-10
EP2576886B1 true EP2576886B1 (de) 2017-03-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11723039.1A Active EP2576886B1 (de) 2010-05-28 2011-05-27 Kühlgerät und verfahren für co2 waschmaschinen

Country Status (3)

Country Link
US (1) US20130167558A1 (de)
EP (1) EP2576886B1 (de)
WO (1) WO2011147956A2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2576885B1 (de) * 2010-05-28 2016-08-24 Electrolux Laundry Systems Sweden AB Kühlgerät und verfahren für co2 waschmaschinen
KR102460179B1 (ko) 2020-11-17 2022-10-28 엘지전자 주식회사 의류처리장치 및 그 제어방법
KR102472995B1 (ko) * 2021-01-25 2022-12-01 엘지전자 주식회사 세탁기
KR102536873B1 (ko) * 2021-01-25 2023-05-26 엘지전자 주식회사 세탁기
KR102552904B1 (ko) * 2021-01-25 2023-07-07 엘지전자 주식회사 세탁기

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB887677A (en) * 1958-07-10 1962-01-24 Pica Soc Nouv Apparatus for solvent recovery
US3002287A (en) * 1960-02-18 1961-10-03 Detrex Chem Ind Control means for solvent recovery machine
DE2426741C3 (de) * 1974-06-01 1982-02-25 Hoechst Ag, 6000 Frankfurt Vorrichtung zum Reinigen von Textilien, Leder und Pelzen mit organischem Lösemittel und zum Destillieren des Lösemittels
DE3038789A1 (de) * 1980-10-14 1982-04-29 Lohmann Gmbh & Co Kg, 5450 Neuwied Verfahren und anlage zur fraktionierten kondensation von loesungsmitteldampfgemischen aus einem traegergasstrom
US4984318A (en) * 1989-06-28 1991-01-15 Coindreau Palau Damaso Method and system for the recovering of solvents in dry cleaning machines
US6004403A (en) * 1991-11-05 1999-12-21 Gebhard Gray Associates Solvent cleaning system
US5702535A (en) * 1991-11-05 1997-12-30 Gebhard-Gray Associates Dry cleaning and degreasing system
US5267455A (en) * 1992-07-13 1993-12-07 The Clorox Company Liquid/supercritical carbon dioxide dry cleaning system
US6397421B1 (en) * 1999-09-24 2002-06-04 Micell Technologies Methods and apparatus for conserving vapor and collecting liquid carbon dioxide for carbon dioxide dry cleaning
US7513132B2 (en) * 2003-10-31 2009-04-07 Whirlpool Corporation Non-aqueous washing machine with modular construction
WO2002031253A2 (en) * 2000-10-13 2002-04-18 Micell Technologies, Inc. Device and process for dry-cleaning process using carbon dioxide and a divided pressure vessel
JP4175811B2 (ja) * 2002-01-30 2008-11-05 日本サーモスタット株式会社 サーモエレメント
JP4121822B2 (ja) * 2002-10-04 2008-07-23 三洋電機株式会社 ドライクリーニング装置
EP1584731A3 (de) * 2004-03-15 2007-11-14 SANYO ELECTRIC Co., Ltd. Trockenreinigungsmaschine und zugehöriger Trockner
US7966684B2 (en) * 2005-05-23 2011-06-28 Whirlpool Corporation Methods and apparatus to accelerate the drying of aqueous working fluids
EP1747822A1 (de) * 2005-07-28 2007-01-31 Linde Aktiengesellschaft Kühl-/Heizsystem für eine Maschine zur Reinigung mit Kohlendioxid
DE602007001206D1 (de) 2006-04-06 2009-07-16 Linde Ag Mehrbad-CO2-Reinigung

Also Published As

Publication number Publication date
US20130167558A1 (en) 2013-07-04
WO2011147956A2 (en) 2011-12-01
WO2011147956A3 (en) 2012-01-19
EP2576886A2 (de) 2013-04-10

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