EP3371530B1 - Kühl- und/oder gefriergerät - Google Patents

Kühl- und/oder gefriergerät Download PDF

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Publication number
EP3371530B1
EP3371530B1 EP17711091.3A EP17711091A EP3371530B1 EP 3371530 B1 EP3371530 B1 EP 3371530B1 EP 17711091 A EP17711091 A EP 17711091A EP 3371530 B1 EP3371530 B1 EP 3371530B1
Authority
EP
European Patent Office
Prior art keywords
refrigerant circuit
unit
carcass
vacuum
insulation body
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
EP17711091.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3371530A2 (de
Inventor
Martin Kerstner
Jochen Hiemeyer
Michael Freitag
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.)
Liebherr Hausgeraete Lienz GmbH
Liebherr Hausgeraete Ochsenhausen GmbH
Original Assignee
Liebherr Hausgeraete Lienz GmbH
Liebherr Hausgeraete Ochsenhausen 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 Liebherr Hausgeraete Lienz GmbH, Liebherr Hausgeraete Ochsenhausen GmbH filed Critical Liebherr Hausgeraete Lienz GmbH
Publication of EP3371530A2 publication Critical patent/EP3371530A2/de
Application granted granted Critical
Publication of EP3371530B1 publication Critical patent/EP3371530B1/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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • F25D19/02—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors plug-in type
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
    • 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
    • F25D2201/00—Insulation
    • F25D2201/10—Insulation with respect to heat
    • F25D2201/14—Insulation with respect to heat using subatmospheric pressure

Definitions

  • the present invention relates to a refrigerator and/or freezer with at least one body, which has at least one full-vacuum insulating body and with at least one refrigerated interior arranged in the body, the appliance having at least one refrigerant circuit that serves to cool the interior.
  • a full-vacuum insulating body is preferably understood to mean that the body of the device consists of more than 90% of the insulating surface from a continuous vacuum insulating space.
  • JP 2007 249537 A discloses a refrigerated vending machine that is easily and inexpensively convertible from chlorofluorocarbon refrigerant operation to carbon dioxide refrigerant operation.
  • an existing chlorofluorocarbon refrigerant refrigeration unit is replaced with a new carbon dioxide refrigerant refrigeration unit. Therefore, components other than the existing one Refrigeration equipment for chlorofluorocarbon refrigerant can be reused, and conversion to a vending machine using carbon dioxide refrigerant can be achieved easily and inexpensively.
  • a vacuum insulation body in which the outer gas-tight walls are made of sheet metal, forms the main component of the thermal insulation EP 2 778 582 A2 .
  • a vacuum-insulated cabinet construction includes panels that are made of sheet metal on the outside and a polymer on the inside. The sheet is coated with a polymeric material and the inner polymeric walls are laminated to this layer. This creates a flat sheet metal blank for forming vacuum cavities. The blank is then bent along fold lines to form a cabinet structure. So at each edge of the cabinet there are two polymer welds and an air-filled gap that together with its two bounding polymer walls form a thermal bridge.
  • the object of the present invention is to provide a refrigerator and/or freezer that advantageously develops the prior art described above by its insulation being able to be manufactured with less effort and having greater fail-safety and fewer thermal bridges.
  • the full-vacuum insulating body consists at least partially of a film bag, the interior of which is filled with a support material, such as perlite, and the interior of which is vacuum.
  • the film bag is designed as an inverted block bottom bag.
  • such a full-vacuum insulating body can only be located in the area of the body or additionally in the closure element, ie in the door, drawer or flap of the device, by means of which the cooled interior can be closed.
  • the envelope of the foil bag is a diffusion-tight cover, by means of which the gas entry in the foil bag is reduced to such an extent that the gas entry-related increase in the thermal conductivity of the resulting vacuum insulation body over its service life is sufficiently low.
  • a period of 15 years, preferably 20 years and particularly preferably 30 years, can be used as the service life.
  • the increase in the thermal conductivity of the vacuum insulating body caused by gas entry over its service life is preferably ⁇ 100% and particularly preferably ⁇ 50%.
  • the area-specific gas permeation rate of the cover is preferably ⁇ 10 -5 mbar*I/s*m 2 and particularly preferably ⁇ 10 -6 mbar*I/s*m 2 (measured according to ASTM D-3985).
  • This gas permeation rate applies to nitrogen and oxygen.
  • gas permeation rates preferably in the range of ⁇ 10 -2 mbar * I / s * m 2 and particularly preferably in the range of ⁇ 10 -3 mbar * I / s * m 2 (measured according to ASTM F -1249-90).
  • these low gas permeation rates achieve the aforementioned small increases in thermal conductivity.
  • the refrigerator or freezer according to the invention is designed with such a full thermal insulation, preferably one or more of the aforementioned Features and forms part of the body and is optionally also arranged in the closure element.
  • a full-surface vacuum insulation has far-reaching consequences for the function of the refrigerator or freezer. Due to the greatly reduced incidence of heat in the cooled interior, the required cooling capacity is reduced and due to the resulting lower heat flows, the requirements for the heat exchanger (evaporator, condenser) of the refrigerant circuit change.
  • thermal bridges in the insulation have a proportionally increased influence on the total heat loss or heat input into the cooled interior. Feedthroughs through the vacuum insulation space represent increased complexity and should be avoided as far as possible in order to achieve a sufficient level of quality in production.
  • the complete refrigerant circuit is designed as an assembly that is inserted into the body. This means that the assembly is placed on the body in a suitable manner.
  • the term "in” does not mean that the entire assembly is inside the body, i.e. inside the refrigerated interior.
  • the assembly is preferably connected to the body in such a way that some of the components of the refrigerant circuit are arranged inside the refrigerated interior space and some of the components of the refrigerant circuit are arranged outside of the refrigerated interior space.
  • At least one and preferably precisely one peripheral recess is arranged in the full-vacuum insulating body, through which the suction line runs from the evaporator to the compressor of the refrigerant circuit and which is provided with at least one thermal insulation, preferably with at least one conventional thermal insulation.
  • an assembly that includes the entire refrigerant circuit, i.e. evaporator, suction line, compressor, condenser and a throttle or capillary, means that the full-vacuum insulating body can be designed in a comparatively simple manner, since the only requirement during production is that the module is used in a suitable manner in or on the body without a large number of openings in the full-vacuum insulating body being required.
  • the full-vacuum insulating body has at least one, and preferably precisely one, edge-side recess or recess, through which at least the suction line runs from the evaporator to the compressor.
  • the capillary, through which the refrigerant passes from the condenser to the evaporator, preferably also runs through the recess mentioned at the edge.
  • the capillary can run inside the suction line.
  • the complete refrigerant circuit is subsequently pushed onto the prefabricated full-vacuum housing, ie onto the body with the full-vacuum insulating body, in such a way that the suction tube lies in the recess of the full-vacuum housing. It can then be covered with conventional insulation, such as foam insulation.
  • At least one condensate line by means of which water is drained from the cooled interior, this condensate drain also running through the said edge-side recess, which is also referred to below as a recess.
  • the condensate drain is also preferably provided with thermal insulation or covered, with conventional thermal insulation preferably also being involved in this case.
  • the suction line runs at least in sections along the outside of the full-vacuum insulating body or the body and that at least one thermal insulation, preferably conventional thermal insulation such as PU foam, covers the suction line over a partial section or over the entire length of the suction line running on the outside.
  • at least one thermal insulation preferably conventional thermal insulation such as PU foam
  • the refrigerant circuit is located in the bottom area of the device. It is conceivable that the assembly is arranged on the floor area of the device in such a way that the evaporator is above the floor, i.e. in the cooled interior, and the compressor and the condenser are below the floor, i.e. outside the cooled interior.
  • a “pedestal unit” which has the compressor and the condenser and which also has the evaporator arranged inside the cooled interior.
  • the assembly may also include at least one fan that conveys or circulates the air cooled by the evaporator into the cooled interior.
  • the present invention is not limited to cabinet-like refrigerators and/or freezers, but also includes refrigerators or chest freezers.
  • the full-vacuum insulating body can, for example, have a simple rectangular shape comparable to a shoe box and have no or only small elevations or depressions.
  • the full-vacuum insulating body does not have any openings.
  • this recess preferably forms the receptacle for the lines of the refrigeration technology, these lines preferably being insulated locally in a conventional manner.
  • the full-vacuum insulating body has at least one film--as stated at the outset--where the film is designed as an inverted block-bottom bag.
  • the block-bottom bag has foil folds in the area of the recess, which store the excess foil required to form the recess.
  • the present invention also relates to a method for producing a refrigerator or freezer according to the invention, a method step comprising the insertion of the complete refrigerant circuit as an assembly in the body.
  • the insertion takes place in such a way that at least the suction line is arranged in the recess mentioned, i.e. in the edge-side recess of the body or the full-vacuum insulating body.
  • the prefabricated assembly can have at least one compressor, condenser, throttle or capillary, evaporator including the connecting lines and possibly one or more fans that serve to generate an air flow over the evaporator and/or the condenser.
  • the refrigerant circuit is already filled with refrigerant when it is inserted into the body.
  • the suction pipe and possibly other pipelines of the refrigerant circuit in the area of the return and possibly the adjacent sections are preferably insulated with conventionally used insulating materials, such as PU foam, in order to lengthen the thermal path through the metal pipes and to reduce heat loss.
  • the refrigerant circuit which is designed as an assembly, is also designed with all actuators, such as valves, etc., that are required to operate the refrigerant circuit.
  • actuators such as valves, etc.
  • control or regulation unit for controlling or regulating the refrigerant circuit.
  • figure 1 shows with the reference number 10 the body of a refrigerator and/or freezer according to the invention.
  • the body has an inner container 12, an outer skin or an outer jacket 14 and a full-vacuum insulation 16 arranged in between. Apart from this full vacuum insulation, no further thermal insulation is planned.
  • the corpus 10 is like out figure 1 Box-shaped construction as can be seen in the longitudinal section.
  • the inner container or the inner skin 12 can, for. B. be designed as a plastic part and in particular as a PS thermoformed part.
  • the outer shell 14 can be made of sheet metal or plastic with a sheet metal that can be attached.
  • the foil forming the vacuum insulating body 16 or its outer covering is completely protected by the inner container 12 and the outer skin 14 .
  • FIG. 1 shows that the refrigerator or freezer according to the invention has an assembly 20 that covers the entire refrigerant circuit including required actuators such.
  • the components of the assembly 20 include the compressor 21, a line 22 between the compressor and the condenser 23, the condenser 23, a capillary 24 from the condenser and the evaporator 25, the evaporator 25, the suction line 27 from the evaporator 25 to the compressor 21.
  • one or more fans 26 are provided, which convey the cold air generated in the evaporator 25 into the cooled interior.
  • the capillary 24 can be cut in sections, particularly in the area of the recess R (cf. Figure 2 c) ) run inside the suction line.
  • figure 2 shows in figure a) the floor area of the refrigerator and/or freezer according to the invention in longitudinal section with built-in refrigerant circuit and with the door 100 which closes the device at the front.
  • Figures b) to e) show the sectional views along the section lines AA to EE in Figure 2a ).
  • the suction line 27 and a condensate drain which conducts condensate from the evaporator or from the cooled interior to the outside, run through this recess or through the edge-side recess.
  • the suction line 27 runs as for example figure 2 a) visible not only by this jump, but also a section along the underside of the body 10 towards the compressor.
  • the intake manifold 27 is conventionally insulated, i.e., for example, by means of foaming, in order to avoid heat loss or heat input.
  • the recess R which is also thermally insulated in order to optimally seal the opening between the exterior and the cooled interior in terms of heat technology.
  • FIG 2 b shows the view according to section line BB in Figure 2a ) and illustrates that the evaporator 25 is embedded in a heat exchanger W1.
  • This heat exchanger or heat exchanger can be, for example, a latent heat storage device.
  • the reference symbols KT and GT denote fans which are used, for example, to convey cold air into the refrigerator or freezer compartment.
  • Out of Figure 2d shows a view according to section line DD.
  • This line shows the arrangement in the area below the bottom B of the body 10.
  • the compressor 21 and the condenser 23 can be seen here.
  • the condenser is arranged in a water bath, which serves as a heat buffer.
  • Figure 2e shows the sectional view along the section line EE according to 2a) and illustrates the arrangement of the heat exchangers W1 and W2. These are designed in such a way that the condenser or the evaporator or the pipelines forming them run within these heat exchangers.
  • Figure 2 c) the arrangement according to section line CC in figure 2 a) and illustrates the arrangement of the recess R in the full vacuum housing 10.
  • the case is covered by the invention in which only the body 10 is equipped with full-vacuum insulation and the door 100 has conventional thermal insulation, such as, for example, foam filling.
  • the case is also covered by the invention in which the door 100 or another closing element, such as the flap of a chest, is designed with full-vacuum insulation.
  • the assembly of the refrigerant circuit also includes one or more fans 26.
  • the air duct is installed in the inner container during final assembly. This should preferably be understood to mean ducts or the like, which guide the air guided through the fan or fans into the corresponding cooled areas of the cooled interior.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Refrigerator Housings (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP17711091.3A 2016-03-16 2017-03-16 Kühl- und/oder gefriergerät Active EP3371530B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016003222 2016-03-16
PCT/EP2017/000340 WO2017157522A2 (de) 2016-03-16 2017-03-16 Kühl- und/oder gefriergerät

Publications (2)

Publication Number Publication Date
EP3371530A2 EP3371530A2 (de) 2018-09-12
EP3371530B1 true EP3371530B1 (de) 2022-04-27

Family

ID=58347312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17711091.3A Active EP3371530B1 (de) 2016-03-16 2017-03-16 Kühl- und/oder gefriergerät

Country Status (7)

Country Link
US (1) US20190056166A1 (es)
EP (1) EP3371530B1 (es)
CN (1) CN108779950A (es)
DE (1) DE102017002599A1 (es)
ES (1) ES2919858T3 (es)
RU (1) RU2734934C2 (es)
WO (1) WO2017157522A2 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019108834A1 (de) * 2019-02-15 2020-08-20 Liebherr-Hausgeräte Lienz Gmbh Wärmeisoliertes Behältnis
DE102023106145A1 (de) 2023-01-20 2024-07-25 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
EP4403854A1 (de) 2023-01-20 2024-07-24 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder gefriergerät

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002090048A (ja) * 2000-09-14 2002-03-27 Matsushita Refrig Co Ltd 冷蔵庫
WO2015044756A1 (de) * 2013-09-26 2015-04-02 Va-Q-Tec Ag Folienumhüllter vakuumdämmkörper

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1789916A (en) * 1929-02-04 1931-01-20 Westinghouse Electric & Mfg Co Refrigerating apparatus
JPH02309171A (ja) * 1989-05-24 1990-12-25 Mitsubishi Electric Corp 冷凍装置
US5934085A (en) * 1997-02-24 1999-08-10 Matsushita Electric Industrial Co., Ltd. Thermal insulator cabinet and method for producing the same
DE102004052624A1 (de) * 2004-10-29 2006-05-11 BSH Bosch und Siemens Hausgeräte GmbH Modulares Kältegerät
EP1691152A1 (en) * 2005-01-14 2006-08-16 Electrolux Home Products Corporation N.V. Modular refrigeration unit and process for assembling a modular refrigeration unit to a cabinet of a refrigeration appliance
DE102005032976A1 (de) * 2005-04-12 2006-10-19 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
DE102005057142A1 (de) * 2005-11-30 2007-06-06 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit modularem Steuer- und Verdampferaufbau
JP2007249537A (ja) * 2006-03-15 2007-09-27 Sanden Corp 自動販売機
US9733006B2 (en) * 2013-02-12 2017-08-15 Doubleday Acquisitions Llc Wrinkle free geometric opening in a vacuum insulated panel
EP2778582B1 (en) * 2013-03-15 2018-04-25 Whirlpool Corporation Folded vacuum insulated structure
JP6230294B2 (ja) * 2013-06-25 2017-11-15 東芝ライフスタイル株式会社 冷蔵庫

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002090048A (ja) * 2000-09-14 2002-03-27 Matsushita Refrig Co Ltd 冷蔵庫
WO2015044756A1 (de) * 2013-09-26 2015-04-02 Va-Q-Tec Ag Folienumhüllter vakuumdämmkörper

Also Published As

Publication number Publication date
US20190056166A1 (en) 2019-02-21
ES2919858T3 (es) 2022-07-28
EP3371530A2 (de) 2018-09-12
WO2017157522A3 (de) 2017-11-09
CN108779950A (zh) 2018-11-09
RU2734934C2 (ru) 2020-10-26
RU2018136207A (ru) 2020-04-16
WO2017157522A2 (de) 2017-09-21
DE102017002599A1 (de) 2017-09-21
RU2018136207A3 (es) 2020-05-19

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