EP1990589A2 - Machine ménagère dotée d'un dispositif de refroidissement - Google Patents

Machine ménagère dotée d'un dispositif de refroidissement Download PDF

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Publication number
EP1990589A2
EP1990589A2 EP08008697A EP08008697A EP1990589A2 EP 1990589 A2 EP1990589 A2 EP 1990589A2 EP 08008697 A EP08008697 A EP 08008697A EP 08008697 A EP08008697 A EP 08008697A EP 1990589 A2 EP1990589 A2 EP 1990589A2
Authority
EP
European Patent Office
Prior art keywords
refrigerant
unit
appliance according
cooling
sorbent
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.)
Withdrawn
Application number
EP08008697A
Other languages
German (de)
English (en)
Inventor
Bernd Geser
Georg Pfitzer
Heiz-Dieter Dr. Eichholz
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.)
Mecoswiss Mechanische Componenten Gmbh and Co KG
Original Assignee
Mecoswiss Mechanische Componenten Gmbh and Co KG
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 Mecoswiss Mechanische Componenten Gmbh and Co KG filed Critical Mecoswiss Mechanische Componenten Gmbh and Co KG
Publication of EP1990589A2 publication Critical patent/EP1990589A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements
    • 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
    • A47L15/48—Drying arrangements
    • A47L15/481—Drying arrangements by using water absorbent materials, e.g. Zeolith
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
    • F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas

Definitions

  • the invention relates to a household appliance with a cooling device according to the preamble of claim 1.
  • a cooling process is at least as part program step often advantageous in addition to other operations.
  • the cooling of a hot beverage may be useful to provide a hot processed beverage as a cold drink, for example as iced coffee.
  • Cooling units are also advantageous for drying operations, since they allow moisture to be condensed from the air.
  • a tumble dryer for example, the entire operation is a drying process, in a machine such as a dishwasher or a washing machine with integrated drying, however, usually provided as a part program step at the end of a program flow.
  • the items to be washed can be dried by the intrinsic heat when the items to be washed in the last rinse, the usually a rinse cycle is, is rinsed so hot that the items wipe off quickly by itself.
  • Such a household appliance is for example with the publication WO 2005/053503 known.
  • This document describes a dishwasher in which a cooling unit is used to dry the wet dishes.
  • This cooling unit has a Feststoffschicher and a storage tank for condensed refrigerant, which are connected by means of a connecting line.
  • the refrigerant flows in heating the sorbent in the sorption in gaseous form in the refrigerant reservoir and condenses there.
  • the refrigerant also flows in gaseous form through the same connecting line in the reverse flow direction back into the sorbent, is cooled by the evaporative cooling of the refrigerant reservoir and its surroundings.
  • the object of the invention is to propose a household appliance with cooling unit, in which this disadvantage is eliminated.
  • a household appliance according to the invention with a cooling device is characterized in that the cooling unit is designed to dispense the refrigeration caused by evaporative cold as separate from the condensation unit assembly and connected to this via a refrigerant-carrying line.
  • cooling unit it is possible to structurally design and arrange the cooling unit so that a more efficient use of cooling is possible.
  • a cooling unit with a comparatively large surface can be used.
  • the arrangement, i. the location of the cooling unit in the household appliance can be made separately from the location of the condensation unit.
  • the condensation unit can be accommodated independently of the cooling unit in an environment where sufficient for the condensation of the refrigerant heat release is possible. It is also possible with regard to the structural design, in particular with regard to the shaping, to adapt the condensation unit functionally independently of the cooling unit.
  • the refrigerant flow from the condensation unit into the cooling unit can be carried out, cooled by evaporation of the condensed refrigerant, the cooling unit and the resulting cold for appropriate use can be delivered.
  • the inner wall of a dishwasher room may be cooled to condense moisture.
  • the cooling unit can also be arranged in the washing compartment of a dishwasher.
  • the structural design of the refrigeration unit is much more flexible in the event of separation from the condensing unit, i.
  • different designs for the cooling unit can be used, especially those that are less suitable for functioning as a refrigerant reservoir.
  • the condensation unit after the Expelling the refrigerant from the sorption of this separated is advantageously provided.
  • this connection line can at least partially serve as a rectification section to separate liquid refrigerant from liquid sorbent.
  • the check valve is preferably mounted in the flow direction behind the rectification section.
  • Such a check valve can be easily designed as a check valve in the case of separation according to the invention between the cooling unit and sorption or refrigerant storage.
  • a control valve is further provided to separate the condensation unit at the desired time from the sorbent or to connect with the sorbent. If this control valve is closed, then condensed refrigerant remains in the condensation unit, which thus effectively forms a cold reservoir. If the control valve is switched to the open state, then the refrigerant flows back to the sorbent, wherein according to the invention the flow path leads over the separately formed cooling unit.
  • solid sorbents can be used as well as liquid sorbents.
  • zeolite calcium chloride, strontium chloride or the like.
  • refrigerant may be in zeolite z.
  • water are used in calcium or strontium chloride ammonia.
  • a good liquid sorbent when using ammonia as a refrigerant is present, for example, in the form of water.
  • a lithium bromide solution may also serve as a liquid sorbent in conjunction with the refrigerant water.
  • the cooling unit is advantageously connected to the sorption agent or the sorption container via a refrigerant return line.
  • the sorbent vessel is thus provided with at least two ports, i. a Kältemitteiausgang and a refrigerant inlet, wherein the output to the condensation unit and the input is connected to the cooling unit.
  • the cooling unit can be structurally flexible designed according to the invention in a separate embodiment.
  • Conceivable for example, embodiments as a cooling coil or in the form of a finned cooler. In both variants, in particular a very flat design is conceivable, which can be easily attached to the wall of a working space.
  • the cooling unit has a conventional heat exchanger, for example as a countercurrent heat exchanger.
  • the condensation unit is advantageously designed so that it comprises a reservoir for condensed refrigerant, so that a cold reservoir is given in sealed condensation unit.
  • a reservoir can be formed in a particular embodiment as a piece of pipe, possibly in snake form.
  • the design of the condensation unit with coils as a reservoir simplifies the cooling of the heat expelled from the sorbent refrigerant and thus the condensation. Depending on the design, this makes it possible to dissipate sufficient heat to the environment, so that no additional cooling, for example via a blower, by means of fresh water or the like, is required.
  • the path is formed in the condensation unit as a dead end, for example as a blind line.
  • the condensation unit can be flown in from below with evaporated refrigerant, so that newly entering gaseous refrigerant passes liquid refrigerant as it passes upwards within the condensation unit and the condensation process can thereby be improved.
  • the discharge of the refrigerant from the condensation unit can again be performed at the lower end, so that the refrigerant flow is assisted by gravity.
  • condensation unit can be designed, for example, with regard to the required capacity
  • cooling unit can be designed with regard to the required surface area for the cold transition with a corresponding volume flow of refrigerants.
  • both the condensation unit and the cooling unit can be in the form of pipelines, which however have different diameters.
  • the invention can be used advantageously where the refrigeration requirement can occur separately from the heat input into the sorption agent, since a cold reservoir in the form of a specific volume of condensed refrigerant is stored cyclically.
  • a cold reservoir in the form of a specific volume of condensed refrigerant is stored cyclically.
  • beverage machines in which hot drinks are subsequently cooled, e.g. in coffee or espresso machines for the preparation of "cold coffee”.
  • the invention can be used advantageously in household appliances, wherein from a cold storage or the cooling unit in particular spontaneously or immediately and / or short-term cooling cold for cooling operating media and / or items needed or in demand or is retrievable.
  • this can also be of particular advantage for example for the rapid cooling of wine bottles, medical cooling packs etc. in refrigerators or the like.
  • the cooling device 1 comprises a sorption container 2, in which a mixture 3 of sorbent and refrigerant is filled in liquid form.
  • a heating of the sorbent / refrigerant mixture 3 via an electric heating coil 4 is possible, which protrudes in the manner of an immersion heater in the liquid standing in the sorption 2.
  • the heating coil 4 can only locally warm the sorbent / refrigerant mixture, since due to the liquid property nevertheless results in a uniform heat distribution by convection.
  • the heat distribution can be supported by stirring or pumping elements.
  • a fluid pipe coil 5 which is designed in principle as the electric heating coil 4, but consists of a hollow tube, so that a hot fluid, such as a working fluid from the operation of the household machine can be supplied heated, so on this way the sorbent / refrigerant-liquid 3 is heated.
  • a third alternative heating is via an external heat exchanger 6, through which the liquid sorbent / refrigerant mixture is circulated.
  • On the Heat exchanger 6 can in turn use a working fluid 7 for heat supply.
  • a working fluid 7 is indicated by means of an arrow. It can also be a specially provided heating medium in interaction with the heat exchanger 6 for heating the sorbent / refrigerant mixture are used.
  • the refrigerant or a higher concentration mixture of sorbent and refrigerant is vaporized depending on the substance selection and passes through a check valve 8 in a cooler 9.
  • a distillation column 10 can be interposed to one step from the sorption Concentrate expelled sorbent / refrigerant mixture.
  • cooler 9 thus enters either refrigerant in pure form or a sorbent / refrigerant mixture in high concentration of refrigerant.
  • a condensation is initiated due to the cooling, so that the concentrated mixture or the pure refrigerant can be collected in liquid form in a refrigerant tank 11.
  • a cooling fluid 12 can be used, for example, that is suitable for further utilizing the waste heat.
  • fresh water can be used to use the withdrawn during the cooling process Desorptionsblaze for preheating the cooling water.
  • the refrigerant tank 11 is from the sorbent container 2 can be separated via a further check valve 13, so that when the check valve 13 is closed, the present in liquid form in the refrigerant tank 11 refrigerant can be kept stored as a cold storage.
  • the sorption agent or the refrigerant-depleted mixture of sorbent and refrigerant 3 in the sorption container 2 can be cooled in this step, which in turn can be accomplished for example by using the heat exchanger 6 in conjunction with a cooling fluid.
  • a cooling fluid can also be circulated by way of a cooling coil projecting into the sorption container 2 for cooling or be used via the container wall of the sorption container 2.
  • a cooling coil in this case, for example, the previously used as a heating coil fluid tube coil 5 can be used.
  • a further heat exchanger 14 is also shown, which forms the cooling unit when the shut-off valve 13 is open and, for example, can be configured as a cooler for a hot air stream 15.
  • the hot air 15 can be withdrawn, for example, from the interior of a household appliance in a suitable manner, for example by means of a blower and passed over the heat exchanger 14 serving as a cooler.
  • the accumulating condensate can be removed or, as indicated above, used for fresh water conditioning or simply to supplement the hot water demand.
  • the dry cold air stream 16 can optionally be heated again using the heat of sorption in the solution of the refrigerant in the sorbent 3.
  • the cold air stream 16 can be conducted via the fluid pipe coil 5 and / or the heat exchanger 6 so that it is reheated using the heat of sorption.
  • This heated dry air stream is ideal for drying wet cleaned items, such as items to be washed in a dishwasher.
  • FIG. 2 corresponds essentially to the aforementioned embodiment, but is structurally significantly simplified.
  • this design is characterized by the fact that it is very flat feasible, so that it can be grown on a side wall of the working space of a household appliance.
  • the cooling device 21 includes, as the aforementioned embodiment, a sorption container 22, in which, depending on the operating state, a sorbent / refrigerant mixture is in an enriched or depleted state.
  • the sorbent / refrigerant mixture in sorption container 22 can be heated by heating means, not shown. As a result, the refrigerant can evaporate and escape into the rectification region 23 of a pipeline 24.
  • the rectification area 23 in the present embodiment is provided with baffles 25 to which coevaporated sorbent may condense and flow back, so that the separation of sorbent and refrigerant in the rectification section 23 is improved.
  • the rectification region 23 accordingly corresponds in its function to the distillation column 10 of the above-described embodiment.
  • a check valve 26 separates the rectification area 23 from the subsequent condensation unit 27, which is designed as a partial area of the pipeline 24.
  • the condensation unit is constructed serpentine and provided in its end with a cross-sectional taper 28.
  • a switching valve 29 limits the condensation unit 27 and interrupts its connection to the sorption container 22 in the flow direction of the refrigerant. Between the check valve 26 and the switching valve 29, the pipe 24 accordingly forms the refrigerant container contained in the aforementioned embodiment.
  • the condensation of the refrigerant takes place in the illustrated embodiment by the heat transfer to the environment without active cooling. If necessary, however, it is readily possible to provide active cooling in this area, for example with fresh water.
  • the switching valve 29 is followed by a cooling unit 30 in the form of a portion of the pipe 24, which is arranged substantially below the condensation region and also formed serpentine.
  • the pipe 24 ends with an end piece 31 behind the evaporator section 30 in the sorption tank 22.
  • the cooling unit is cooled by evaporating or cold, already vaporized refrigerant and can deliver the cold thus produced.
  • This embodiment is structurally already considerably simplified compared to the first embodiment.
  • the Entire circulation of the refrigerant takes place in a single pipeline.
  • this cooling device 21 only two temporally decoupled control operations must be made.
  • the refrigerant / sorption mixture in the sorption 22 must be heated.
  • condensed refrigerant in the condensation unit 27 is available as a cold storage.
  • the switching valve 29 can be opened at the desired time, so that the refrigerant can escape in the direction of the sorption container 22 and can be used in the cooling unit 30 with evaporation for cooling.
  • This embodiment is therefore greatly simplified not only in terms of the structural design, but also in terms of the control effort over the first embodiment.
  • the embodiment according to FIG. 3 again has a rectification region 32 of a pipeline 33, which branches off from a sorption container 34.
  • the rectification region 32 in turn passes via a check valve 36 into a condensation unit 35 designed as a pipeline, which in turn is of serpentine configuration.
  • the condensation unit 35 is therefore filled from below, that is, already condensed refrigerant supports the condensation process during the passage of gaseous, not shown by heating means of the Sorption tank 34 expelled refrigerant.
  • a cooling line 38 which opens via a switching valve 39 in a riser 40.
  • the riser 40 already belongs to a cooling unit 41, which is tubular and in which the refrigerant evaporates.
  • the cooling unit 41 is fitted to the serpentine condensation unit 35. It ends in a discharge line 42 in the sorption container 34.
  • This embodiment variant can in turn be constructed very flat and at the same time comparatively low.
  • the branching cooling line 38 is provided with a reduced cross-section.
  • the evaporation process is assisted by the fact that liquid refrigerant is forced under gravity into the riser 40 of the cooling unit 41. Due to the resulting cooling effect of the condensation unit 35 due to the thermal contact between the cooling unit 41 and the condensation unit 35, the remaining condensation of any gaseous residues of refrigerant in the upper region of the condensation unit 35 is effected at the same time. There is thus an almost complete emptying of the condensation unit 35, whereby the existing refrigerant is used highly efficiently.
  • the embodiment according to FIG. 3 is accordingly more compact than the embodiment according to FIG. 2 feasible with comparable cooling capacity. In both cases, it is a substantially closed pipe system, so that the requirements for tightness can be easily met.
  • the embodiment according to FIG. 3 exploits the fact that in a cooling device according to the invention, the timing of the expulsion of the refrigerant from the sorption container 34 by heating from the time of the desired cooling is decoupled. Accordingly, the variant according to FIG. 3 no closed circuit, consisting of rectification area, condensation unit and cooling unit. Rather, the temporal decoupling between heat input and cooling is used to the effect that a reversal of the flow direction in the condensation unit 35 is possible. The filling of the condensation unit 35 when expelling the refrigerant from the sorbent is thus in the reverse direction as the emptying into the cooling unit.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sorption Type Refrigeration Machines (AREA)
EP08008697A 2007-05-11 2008-05-09 Machine ménagère dotée d'un dispositif de refroidissement Withdrawn EP1990589A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007022697 2007-05-11
DE102007049053 2007-10-11
DE102007054449 2007-11-13

Publications (1)

Publication Number Publication Date
EP1990589A2 true EP1990589A2 (fr) 2008-11-12

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EP08008697A Withdrawn EP1990589A2 (fr) 2007-05-11 2008-05-09 Machine ménagère dotée d'un dispositif de refroidissement

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US (1) US20080276644A1 (fr)
EP (1) EP1990589A2 (fr)
DE (1) DE102008023070A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007533940A (ja) * 2003-07-30 2007-11-22 ベーエスハー　ボッシュ　ウント　ジーメンス　ハウスゲレーテ　ゲゼルシャフト　ミット　ベシュレンクテル　ハフツング 少なくとも１つの部分プログラム段階「乾燥」を有する装置を運転する方法
ES2976457T3 (es) * 2019-05-29 2024-08-01 Carrier Corp Aparato de refrigeración

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005053503A1 (fr) 2003-12-04 2005-06-16 BSH Bosch und Siemens Hausgeräte GmbH Lave-vaisselle

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT283402B (de) * 1968-07-15 1970-08-10 G U E Zimmermann Periodisch arbeitende Absorptionskältemaschine für Kühlcontainer
JP2769657B2 (ja) * 1991-06-24 1998-06-25 シャープ株式会社 熱交換装置およびその腐食防止方法
US5272891A (en) * 1992-10-21 1993-12-28 Erickson Donald C Intermittent sorption cycle with integral thermosyphon
US5490398A (en) * 1993-03-15 1996-02-13 Airex Research And Development, Inc. High efficiency absorption cooling and heating apparatus and method
DE4334808C1 (de) * 1993-10-13 1994-10-06 Daimler Benz Ag Verfahren zum Betreiben einer Sorptionsanlage zum Klimatisieren von Fahrzeugen, insbesondere Elektrofahrzeugen, und eine Sorptionsanlage, insbesondere zur Durchführung desselben
WO1996011368A1 (fr) * 1994-10-06 1996-04-18 Electrolux Leisure Appliances Ab Dispositif de refroidissement comportant une unite frigorifique a fonctionnement intermittent
US6244056B1 (en) * 1995-09-20 2001-06-12 Sun Microsystems, Inc. Controlled production of ammonia and other gases
KR19990045764A (ko) * 1995-09-20 1999-06-25 핀트족 마르시아디 흡수쌍 냉동 장치
US5916259A (en) * 1995-09-20 1999-06-29 Sun Microsystems, Inc. Coaxial waveguide applicator for an electromagnetic wave-activated sorption system
DE19958955C2 (de) * 1999-12-07 2002-12-12 Electrolux Siegen Gmbh Absorptionskühlanordnung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005053503A1 (fr) 2003-12-04 2005-06-16 BSH Bosch und Siemens Hausgeräte GmbH Lave-vaisselle

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US20080276644A1 (en) 2008-11-13
DE102008023070A1 (de) 2008-11-13

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