EP2409094B1 - Kältegerät - Google Patents

Kältegerät Download PDF

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Publication number
EP2409094B1
EP2409094B1 EP10704567.6A EP10704567A EP2409094B1 EP 2409094 B1 EP2409094 B1 EP 2409094B1 EP 10704567 A EP10704567 A EP 10704567A EP 2409094 B1 EP2409094 B1 EP 2409094B1
Authority
EP
European Patent Office
Prior art keywords
tube
plastic layer
refrigeration appliance
restrictor
throttle
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
EP10704567.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2409094A1 (de
Inventor
Thomas Kranz
Holger Moch
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
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 BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL10704567T priority Critical patent/PL2409094T3/pl
Publication of EP2409094A1 publication Critical patent/EP2409094A1/de
Application granted granted Critical
Publication of EP2409094B1 publication Critical patent/EP2409094B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/06—Superheaters
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/37—Capillary tubes
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/05—Compression system with heat exchange between particular parts of the system
    • F25B2400/052—Compression system with heat exchange between particular parts of the system between the capillary tube and another part of the refrigeration cycle
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/05—Compression system with heat exchange between particular parts of the system
    • F25B2400/054—Compression system with heat exchange between particular parts of the system between the suction tube of the compressor and another part of the cycle

Definitions

  • the invention relates to a refrigerator.
  • Refrigeration devices extract heat from a room with a low temperature level, the interior of the refrigeration device, in order to emit it in a room with a higher temperature level, as a rule in the room surrounding the refrigeration device.
  • refrigerants are used for this, which evaporate at low temperatures.
  • the refrigerant circulates in a closed pipe system, the refrigerant circuit.
  • the refrigerant circuit comprises an evaporator, a compressor (compressor), a condenser (condenser) and a throttle element.
  • the refrigerant evaporates at low pressure, thereby extracting heat from the interior.
  • the resulting gaseous refrigerant is led out of the interior and fed to the compressor via a so-called suction pipe, which compresses it and forwards the compressed and thus increased in temperature to the condenser.
  • the refrigerant releases heat into the ambient air in the condenser.
  • the refrigerant liquefied by this then passes through the throttle body, in which the pressure is reduced, into the evaporator.
  • the refrigerant cycle starts again.
  • a pipe with a small diameter, in particular a copper pipe, is generally used as a throttle device in household refrigeration appliances.
  • the suction pipe leading to the compressor usually consists of aluminum, since it is made in one piece with the evaporator.
  • the layout font DE 12 50 845 shows a connection of single-pipe connections of refrigerator evaporators between the connecting tube made of aluminum or an aluminum alloy of the evaporator, the suction tube made of copper and the capillary tube made of copper.
  • the disclosure GB 2,418,478 shows a heat exchanger comprising a capillary tube and a suction tube, both tubes touching and parallel to each other over a limited distance.
  • the disclosure DE 19 04 245 A1 shows a capillary tube connection point on plate-shaped evaporators with a single-tube connection, wherein a hardening seal made of liquid plastic is provided between the capillary tube and the calibrated part of the guide channel after insertion.
  • WO 02/07948 A1 shows a method and an apparatus for producing an insulated pipe.
  • the disclosure EP 17 95 846 A1 shows a heat exchanger with a plurality of pipe elements.
  • the invention achieves this object with a refrigeration device according to claim 1.
  • the throttle tube comprises a metal tube which is coated with a plastic layer over at least part of its length.
  • a plastic layer very well electrically insulates the two tubes from one another.
  • Plastic is not very thermally conductive, but if the plastic layer is chosen to be sufficiently thin, heat is still exchanged between the intake manifold and throttle tube.
  • the plastic layer is more resistant to corrosion than, for example, a galvanically applied zinc layer.
  • the plastic layer can be easily removed from the pipe ends, for example by simply slitting and pulling off, for which purpose no tool other than the fingernail is required.
  • the tube ends of the throttle tube must be bare so that the throttle tube can be mounted on the one hand at the injection point of the evaporator and on the other hand on a dry cartridge or at the outlet of the condenser.
  • the metal tube of the throttle tube is preferably made of copper or a copper alloy, since copper tubes are easy to manufacture and are sufficiently flexible.
  • the throttle tube is preferably approximately 30 cm to 3 m long and has an outer diameter of approximately 0.5-4 mm and an inner diameter of approximately 0.5-0.8 mm. The pressure loss to be achieved can be adjusted by varying the length or the inner diameter of the throttle tube.
  • the plastic layer should be made as thin as possible. It has a thickness between 20 and 500 ⁇ m, preferably between 50 and 300 ⁇ m, particularly preferably between 100 and 200 ⁇ m. This ensures that there is sufficient heat exchange between the throttle tube and the intake manifold in contact with it.
  • the plastic layer has a thermoplastic or thermosetting plastic or consists entirely of such a plastic, such as PUR (polyurethane), PP (polypropylene) or PE (polyethylene) and / or the plastic layer is doped with a thermally conductive additional material.
  • the plastic is particularly preferably extrudable, so that the plastic layer can be applied to the throttle tube by co-extrusion. Such a co-extruded coating can be removed easily and without damaging the base material.
  • graphite powder less preferably metal powder
  • the thermally conductive additional material can also be zinc oxide, quartz, starch or talc.
  • the throttle pipe is in contact with at least a portion of its length with a suction pipe leading to a compressor.
  • a plastic layer arranged on the outside of the throttle tube touches the outside of the intake manifold at least at one point, so that a thermal bridge is produced.
  • the section of the throttle pipe which is in contact with the intake pipe particularly preferably runs parallel to a section of the intake pipe. It is also possible for the throttle tube to have a plurality of sections which run parallel to a section of the intake manifold, namely by the throttle tube traversing at least one hairpin curve and thus bypassing one and the same section of the intake manifold with two sections which conduct refrigerants in opposite directions becomes. Alternatively, it is also possible to place the throttle tube or a section of the throttle tube spirally around the intake manifold, so that the throttle tube is in contact with the intake manifold in its spiral region over its entire length.
  • the sections of the throttle tube and the intake manifold which are in contact with one another are preferably fastened to one another.
  • the attachment can be done for example by a clamp or a suitable adhesive.
  • the respective sections of the throttle tube and the intake manifold are particularly preferably fastened to one another by an adhesive tape.
  • the adhesive tape is preferably aligned along the pipe axes, that is to say is glued lengthways and preferably runs at least essentially over the entire section of the throttle pipe or the suction pipe that is in contact.
  • the refrigeration device is preferably a domestic refrigeration device, in particular a refrigerator, a freezer or a fridge-freezer.
  • Fig. 1 shows a refrigerant circuit of a refrigerant device, as is used in particular in household refrigeration devices.
  • the refrigerant evaporates in coils 14 of the evaporator 13 and thereby extracts heat from the interior of the refrigeration device.
  • the evaporated refrigerant is fed to the compressor 15 via the suction pipe 4.
  • the compressed refrigerant flows through the coils 17 of the condenser 16, which is arranged, for example, on the rear wall or in a side wall of the refrigeration device.
  • the liquefied refrigerant then flows through the throttle tube 2 via a dryer 18 along the direction of flow indicated by the arrow P. This can be up to 2 to 3 meters long, which is why it is compactly arranged in lines 2 '.
  • the throttle pipe 2 Over a part L of its length, the throttle pipe 2 is guided in parallel and in contact with a corresponding section of the intake pipe 4 leading to the compressor.
  • the length L, along which the suction pipe 4 and the throttle pipe 2 are to be in contact, is, for example, 5 cm to 1 m, preferably approximately 20 to 40 cm.
  • the evaporator 13 is preferably a so-called “tube-onsheet” evaporator, in which the coil 14 is attached to a plate.
  • the heat exchange takes place between the intake pipe 4 and the throttle pipe 2, preferably by direct contact between the two pipes.
  • Fig. 2 shows the intake manifold 4 and the throttle tube 2 in contact with it in cross section.
  • the suction pipe 4 typically consists of aluminum or an aluminum alloy.
  • the suction pipe 2 consists of a copper pipe 12 which is covered with a plastic layer 22.
  • the outer diameter of the copper tube 12 is approximately 1.8 mm, the inner diameter approximately 0.5 mm.
  • the Plastic layer 22 with a thickness of approximately 0.2 mm is in contact with the suction pipe 4.
  • the latter is connected to the evaporator 13 and is preferably soldered there. It is therefore important to be able to easily remove the plastic layer 22 at the ends of the suction pipe 2.
  • this is connected to a drying cartridge 18 or to the condenser 16. This connection can also be made by soldering or welding, so that the throttle tube 2 must also be freed from the plastic layer 22 at the end 19.
  • Fig. 3 and 4 show preferred types of connection of the intake manifold 4 with the throttle tube 2.
  • an adhesive tape 6 is used, preferably a plastic adhesive tape which is glued lengthwise around the sections of the length L of the intake manifold 4 and the throttle tube 2.
  • a clamp 8 for example made of plastic, can also be used to keep the throttle tube 2 in heat-conducting contact with the intake manifold 4.
  • several clamps 8 can also be used, which are clamped at intervals along the section at which the two pipes are to be in contact with one another via the two pipes 2, 4.
  • a metal tube in particular copper tube 12
  • the copper tube 12 is initially wound as a continuous material on a roll 30.
  • the roller 30 By driving the roller 30 in the direction of the arrows Q, the copper tube 12 is unrolled and fed to the extruder 32 via a guide roller 31.
  • Liquid plastic is also fed to the extruder via the screw drive 34.
  • the copper tube 12 is drawn as a core or core through the extrusion nozzle 33 and sheathed there from the outside with the plastic.
  • the plastic hardens in the area 35 behind the nozzle, and the coated throttle tube material 2 is wound on a further roll 36.
  • an endless throttle tube 2 is produced, which can be processed into finished throttle tubes by cutting.
  • the plastic material located in the screw 34 is, for example, PUR or PA (polyamide), and the liquid plastic can be mixed with a thermally conductive material in powder or granule form. Graphite is preferred for this.
  • the easily manufactured, corrosion-resistant throttle tube can be guided in heat-conducting contact to a suction tube or end section of an evaporator tube without violating standard specifications.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)
EP10704567.6A 2009-03-19 2010-02-18 Kältegerät Active EP2409094B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10704567T PL2409094T3 (pl) 2009-03-19 2010-02-18 Urządzenie chłodnicze

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009001677A DE102009001677A1 (de) 2009-03-19 2009-03-19 Kältegerät, Drosselrohr für ein Kältegerät und Verfahren zu dessen Herstellung
PCT/EP2010/052024 WO2010105884A1 (de) 2009-03-19 2010-02-18 Kältegerät, drosselrohr für ein kältegerät und verfahren zu dessen herstellung

Publications (2)

Publication Number Publication Date
EP2409094A1 EP2409094A1 (de) 2012-01-25
EP2409094B1 true EP2409094B1 (de) 2020-01-01

Family

ID=42125908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10704567.6A Active EP2409094B1 (de) 2009-03-19 2010-02-18 Kältegerät

Country Status (4)

Country Link
EP (1) EP2409094B1 (pl)
DE (1) DE102009001677A1 (pl)
PL (1) PL2409094T3 (pl)
WO (1) WO2010105884A1 (pl)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010029581A1 (de) * 2010-06-01 2011-12-01 BSH Bosch und Siemens Hausgeräte GmbH Saug-Drosselrohr für ein Kältegerät
DE102010027589A1 (de) * 2010-06-18 2011-12-22 Liebherr-Hausgeräte Ochsenhausen GmbH Haushaltsgerät
KR101861832B1 (ko) 2011-11-04 2018-05-29 엘지전자 주식회사 진공 공간부를 구비하는 냉장고
KR20130050639A (ko) * 2011-11-08 2013-05-16 삼성전자주식회사 비공비 혼합 냉매사이클 및 냉장고
CN102798244A (zh) * 2012-09-11 2012-11-28 合肥美的荣事达电冰箱有限公司 一种用于冰箱的换热组件及冰箱
EP2857778A1 (en) * 2013-10-03 2015-04-08 Whirlpool Corporation Refrigerator with a non-azeotropic mixture of hydrocarbons refrigerants
CN104457122B (zh) * 2014-12-24 2018-02-13 合肥美的电冰箱有限公司 冰箱
EP3073210A1 (en) * 2015-03-27 2016-09-28 Whirlpool Corporation Refrigerator with enhanced efficiency
DE102015210112A1 (de) * 2015-06-02 2016-12-08 BSH Hausgeräte GmbH Kältemittelkreislauf
CN112944740B (zh) * 2021-03-22 2022-05-20 西安工业大学 空调温区分层式变孔隙率蜂窝结构回热器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19509937C1 (de) * 1995-03-18 1996-05-02 Tecalemit Gmbh Deutsche Rohrleitungsanordnung
WO2004036125A2 (en) * 2002-10-18 2004-04-29 Parker-Hannifin Corporation Refrigeration expansion valve with thermal mass power element

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1250845B (de) 1967-09-28 Wieland-Werke Aktiengesellschaft, Ulm/Donau Verbindung bei Einrohranschlüssen von Kältemaschinenverdampfern
DE1904245A1 (de) 1969-01-29 1970-08-06 Ver Deutsche Metallwerke Ag Kapillarrohr-Anschlussstelle
JPH10132396A (ja) * 1996-10-31 1998-05-22 Hoshizaki Electric Co Ltd 熱交換装置
KR20010083606A (ko) * 2000-02-17 2001-09-01 김완호 냉동냉장장치
NL1015760C2 (nl) 2000-07-20 2002-01-24 Thermaflex Internat Holding B Werkwijze en inrichting voor het vervaardigen van ge´soleerde buis.
GB2418478A (en) 2004-09-24 2006-03-29 Ti Group Automotive Sys Ltd A heat exchanger
DE102005059667A1 (de) 2005-12-12 2007-06-14 Valeo Systemes Thermiques, La Verriere Wärmetauscher mit einer Mehrzahl von Rohrelementen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19509937C1 (de) * 1995-03-18 1996-05-02 Tecalemit Gmbh Deutsche Rohrleitungsanordnung
WO2004036125A2 (en) * 2002-10-18 2004-04-29 Parker-Hannifin Corporation Refrigeration expansion valve with thermal mass power element

Also Published As

Publication number Publication date
EP2409094A1 (de) 2012-01-25
WO2010105884A1 (de) 2010-09-23
DE102009001677A1 (de) 2010-09-23
PL2409094T3 (pl) 2020-07-13

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