EP1850706B1 - Vitrine à réfrigération transcritique - Google Patents

Vitrine à réfrigération transcritique Download PDF

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Publication number
EP1850706B1
EP1850706B1 EP05715406A EP05715406A EP1850706B1 EP 1850706 B1 EP1850706 B1 EP 1850706B1 EP 05715406 A EP05715406 A EP 05715406A EP 05715406 A EP05715406 A EP 05715406A EP 1850706 B1 EP1850706 B1 EP 1850706B1
Authority
EP
European Patent Office
Prior art keywords
display unit
compartment
unit according
fluid
transcritical
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.)
Not-in-force
Application number
EP05715406A
Other languages
German (de)
English (en)
Other versions
EP1850706A1 (fr
Inventor
Rudolf BRÖSTL
Edwin Bloch
Rainer Schrey
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.)
Carrier Corp
Original Assignee
Carrier Corp
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 Carrier Corp filed Critical Carrier Corp
Publication of EP1850706A1 publication Critical patent/EP1850706A1/fr
Application granted granted Critical
Publication of EP1850706B1 publication Critical patent/EP1850706B1/fr
Not-in-force 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0439—Cases or cabinets of the open type
    • A47F3/0443—Cases or cabinets of the open type with forced air circulation
    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • 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

Definitions

  • the subject of the present invention is a display unit comprising at least one compressor, at least one fluid/gas heat exchanger for cooling the compressed gas, at least one evaporator, at least one expansion device and conduits connecting the afore-mentioned components with each other to form a "transcritical" refrigeration circuit, especially a carbon dioxide refrigeration circuit.
  • transcritical refrigeration circuit refers to a refrigeration circuit which can be operated in a subcritical as well as a super- or transcritical mode.
  • display unit shall include all kind of display units, especially cabinets, multideck cabinets, roll-in cabinets, counters et cetera. Display units as mentioned before are well known to a skilled person.
  • EP-A-0 908 688 discloses display units as described above as well as a refrigeration plant, by which one or more display units are connected via their fluid/gas heat exchangers to a refrigeration cycle. The heat given up from the transcritical refrigeration circuit of each display unit via its fluid/gas heat exchanger is discharged to the refrigeration cycle. Within the refrigeration cycle a fluid such as water is circulating; an anti-freeze-agent may be added to the circulating fluid if required. These kinds of refrigeration cycles are designed in a way that their pressures do not exceed 25 bar.
  • WO 95/08087 A discloses a refrigerated merchandiser which has a removable refrigeration unit mounted in the base thereof.
  • the refrigeration unit is supported on guide rails which in the installed position operatively support the refrigeration unit in position.
  • the guide rails allow the refrigeration unit to be moved out from the cabinet for maintenance or replacement. Special leverage achieved through moving the guide rails from one position to the other lifts the refrigeration unit into the correct position.
  • the refrigeration unit delivers air flows to enhance the efficient operation of the refrigerated merchandiser with the filtered air flow to the merchandiser being drawn from underneath the merchandiser and the warm air being delivered up over the outside front of the access doors.
  • the main object of the present invention is to provide a display unit, which avoids the above-discussed problem regarding the high pressures within a transcritical refrigeration circuit, especially within a carbon dioxide refrigeration circuit.
  • a further object of the present invention is to provide a display unit, which in case of any fault of one of the above-mentioned components enables an easy and quick replacement of a non-operating component by an operating component. This replacement of a non-operating component should be manageable even by a person not skilled in the art.
  • the innovative concept upon which the present invention is based is that at least the compressor and the fluid/gas heat exchanger are arranged within a compartment, which can be removable from the display unit.
  • the compartment should be designed so as to be stable enough to at least substantially reduce the effect of any breach or leakage of any of the components comprising the refrigerant under pressure.
  • Various materials can be used for the compartment, for example metal sheet, plastic material, etc. It is also possible to use different material in combination, for example a hard shell together with a dampening material. It is particularly possible to provide the hard shell at the outside and the dampening material at the inner side thereof. It is also possible to provide the compartment with a venting means, like an opening, a discharge valve, etc. in order to allow venting of the refrigerant after a failure of the refrigeration circuit.
  • the compartment can comprise an attachment means, like an attachment flange, for attaching the compartment to the support structure. It might be sufficient to have the compartment rest on the support structure, it is also possible to additionally secure the compartment removably thereto, for example by means of a nut and bold fastener.
  • a positioning means can be provided with the support structure and/or with the compartment in order to ensure a precise positioning of the compartment in the installed condition.
  • the positioning means can have a conical shape or can be V-shaped in order to allow for easy inserting as well as precise positioning.
  • Display means like instruments, a screen, etc., for displaying an operational condition and/or operating means, like knobs, etc. can be provided on the compartment's outer side in order to adjust cooling output, correct temperature, etc.
  • a powerline with a plug may lead out of the compartment.
  • signal lines can be provided.
  • Quick couplings can be provided in order to fluidly couple components within the compartment with exterior components, conduits, etc. Accordingly, the compartment can easily be replaced by merely decoupling the quick couplings and unplugging the powerline.
  • a "back cooling" For cooling the fluid/heat exchanger, it is possible to provide a "back cooling" to the compartment or directly to the fluid/gas heat exchanger.
  • Such back cooling can be provided by means of a "low pressure" cooling circuit, e.g. with another refrigerant and even with air or water.
  • the respective conduits can be connected to the compartment with a quick release coupling, for example.
  • transcritical refrigeration circuit In accordance with an embodiment additional or all of the above-mentioned components forming the transcritical refrigeration circuit are arranged within said compartment.
  • the compartment will function as a buffer for the escaping gas. For that reason no direct disturbance or harm to service persons and customers should occur.
  • the component does not have to be repaired within the display unit or replaced from the display unit, which normally takes for at least 30 minutes. During this period the display unit is out of order.
  • the whole compartment can be removed and replaced by another compartment, housing operating components. The time for replacing the compartment takes about 10 minutes or less. The repair of the non-operating component can then be realized without any time pressure and stress.
  • the compartment is preferably arranged below the show room or storing compartment of the display unit.
  • This arrangement enables an easy and quick replacement of the compartment.
  • FIGS. 1 and 2 a multideck cabinet C is shown. Below the show room or storing compartment S a compartment 1 is arranged. Within that compartment 1 a compressor 2, a fluid/gas heat exchanger 3 for cooling the compressed gas and conduits - not shown in figures 1 to 3 - are arranged. Outside of the compartment 1 an evaporator 4 and an expansion device - not shown in figures 1 to 3 - are arranged; the afore-mentioned components are connected with each other to form a transcritical refrigeration circuit, especially a carbon dioxide refrigeration circuit, as e. g. described in the above-mentioned EP-A-0 908 688 .
  • a transcritical refrigeration circuit especially a carbon dioxide refrigeration circuit
  • the aforementioned expansion device is preferably designed as an expansion valve, while the compressor 2 is preferably designed as a frequency controlled compressor.
  • the amount of the medium, circulating in the transcritical refrigeration circuit does not exceed 1000 g.
  • cooling air 6 is forced by the ventilating fans 5,5' to flow through the evaporator 4, wherein the air is cooled against the evaporating refrigerant of the transcritical refrigeration circuit, and via the backflow-channel 7 to the show room or storing compartment S of the multideck cabinet C.
  • This flow of the circulating cooling air is already known to a skilled person.
  • the ventilating fans 5,5' are especially frequency controlled ventilating fans. This enables an optimal adaptation of the power of the ventilating fans 5,5' to the required cooling capacity.
  • compartment 1 has to be removed or replaced by an other compartment only the connection to the power source, which is at least necessary for the compressor(s) and the fan(s), and the quick coupling have to be separated.
  • each module has its own compartment 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Freezers Or Refrigerated Showcases (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Details Of Aerials (AREA)

Claims (9)

  1. Vitrine comprenant un compresseur (2), un échangeur thermique fluide/gaz (3) pour refroidir le gaz compressé, un évaporateur (4), un dispositif d'expansion et des conduits de pression élevée reliant les composants susmentionnés l'un à l'autre pour former un circuit de réfrigération transcritique,
    dans lequel au moins le compresseur (2) et l'échangeur thermique fluide/gaz (3) sont disposés dans un compartiment (1) ; dans lequel le compartiment est supporté par une structure de support dans la vitrine ;
    dans lequel le compartiment (1) est conçu pour être stable suffisamment pour au moins réduire essentiellement l'effet de toute brèche d'un quelconque des composants comprenant le réfrigérant transcritique sous pression ;
    dans lequel un circuit de refroidissement basse pression est fourni pour refroidir l'échangeur thermique fluide/gaz (3) du circuit de réfrigération transcritique haute pression ; et
    dans lequel le compartiment (1) a une coque dure de son côté extérieur et un matériau d'amortissement de son côté intérieur et est configuré pour servir en tant que tampon pour un gaz d'échappement.
  2. Vitrine selon la revendication 1, dans lequel tous les composants formant le circuit de réfrigération transcritique sont disposés dans ledit compartiment (1).
  3. Vitrine selon la revendication 1 ou la revendication 2, dans lequel ledit compartiment (1) est disposé en dessous du compartiment d'exposition ou de stockage (S) de la vitrine (C).
  4. Vitrine selon une ou plusieurs des revendications précédentes, dans lequel la quantité du milieu circulant dans le circuit de réfrigération transcritique ne dépasse pas 1000 g.
  5. Vitrine selon une ou plusieurs des revendications précédentes, dans lequel le dispositif d'expansion est une valve d'expansion.
  6. Vitrine selon une ou plusieurs des revendications précédentes, dans lequel le compresseur (2) est un compresseur commandé en fréquence.
  7. Vitrine selon une ou plusieurs des revendications précédentes, dans lequel la vitrine comprend au moins un couplage rapide, par lequel l'échangeur thermique fluide/gaz (3) est raccordé à un cycle ou installation de réfrigération.
  8. Vitrine selon une ou plusieurs des revendications précédentes, dans lequel l'unité de réfrigération transcritique est un circuit de réfrigération de dioxyde de carbone.
  9. Vitrine selon une ou plusieurs des revendications précédentes, dans lequel le compartiment est amovible à partir de la vitrine (C).
EP05715406A 2005-02-18 2005-02-18 Vitrine à réfrigération transcritique Not-in-force EP1850706B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2005/001722 WO2006087007A1 (fr) 2005-02-18 2005-02-18 Unite d’affichage a refrigeration transcritique

Publications (2)

Publication Number Publication Date
EP1850706A1 EP1850706A1 (fr) 2007-11-07
EP1850706B1 true EP1850706B1 (fr) 2010-09-01

Family

ID=34961780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05715406A Not-in-force EP1850706B1 (fr) 2005-02-18 2005-02-18 Vitrine à réfrigération transcritique

Country Status (5)

Country Link
EP (1) EP1850706B1 (fr)
AT (1) ATE479364T1 (fr)
DE (1) DE602005023352D1 (fr)
DK (1) DK1850706T3 (fr)
WO (1) WO2006087007A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010035695A1 (de) * 2010-08-27 2012-03-01 Aht Cooling Systems Gmbh Kühlmöbel, insbesondere Kühlregal

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712078A (en) * 1971-11-22 1973-01-23 Krispin Eng Ltd Refrigeration unit
AU691199B2 (en) * 1993-09-14 1998-05-14 Skope Industries Limited Improvements in/or relating to a method of installing and operating a refrigeration unit in a refrigerated merchandiser and/or a refrigerated merchandiser employing said method
IT1295482B1 (it) * 1997-10-07 1999-05-12 Costan Spa Impianto frigorifero
GB9903593D0 (en) * 1999-02-18 1999-04-07 Hussmann Europ Ltd Improvements in or relating to refrigeration
US6558017B1 (en) * 2001-12-18 2003-05-06 Illumitech, Inc. Lighting system employing bi-directional optics for illuminating product display unit
JP4179927B2 (ja) * 2003-06-04 2008-11-12 三洋電機株式会社 冷却装置の冷媒封入量設定方法
EP1547492A3 (fr) * 2003-12-15 2005-07-13 Hussmann Corporation Système modulaire de réfrigération

Also Published As

Publication number Publication date
ATE479364T1 (de) 2010-09-15
DE602005023352D1 (de) 2010-10-14
WO2006087007A1 (fr) 2006-08-24
EP1850706A1 (fr) 2007-11-07
DK1850706T3 (da) 2010-11-29

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