EP1050723B1 - Système frigorifique et procédé de fonctionnement d'un système frigorifique - Google Patents

Système frigorifique et procédé de fonctionnement d'un système frigorifique Download PDF

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Publication number
EP1050723B1
EP1050723B1 EP00109559A EP00109559A EP1050723B1 EP 1050723 B1 EP1050723 B1 EP 1050723B1 EP 00109559 A EP00109559 A EP 00109559A EP 00109559 A EP00109559 A EP 00109559A EP 1050723 B1 EP1050723 B1 EP 1050723B1
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EP
European Patent Office
Prior art keywords
circuit
refrigeration
collecting container
freezing
normal
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.)
Expired - Lifetime
Application number
EP00109559A
Other languages
German (de)
English (en)
Other versions
EP1050723A2 (fr
EP1050723A3 (fr
Inventor
Klaus Koch
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 Kaeltetechnik Deutschland GmbH
Original Assignee
Linde Kaeltetechnik GmbH
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Filing date
Publication date
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Application filed by Linde Kaeltetechnik GmbH filed Critical Linde Kaeltetechnik GmbH
Publication of EP1050723A2 publication Critical patent/EP1050723A2/fr
Publication of EP1050723A3 publication Critical patent/EP1050723A3/fr
Application granted granted Critical
Publication of EP1050723B1 publication Critical patent/EP1050723B1/fr
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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • 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
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors
    • 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
    • F25B2400/16—Receivers
    • 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
    • F25B2400/22—Refrigeration systems for supermarkets
    • 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
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves

Definitions

  • the invention relates to a refrigeration system with at least one normal refrigeration cycle and at least one freezing cycle, wherein the circuits interconnected and only one condenser is provided and the freezing circuit has an at least two-stage compressor unit.
  • EP-A-0 076 716 discloses a two-stage refrigeration process with a single-stage compressor unit.
  • the invention relates to a method for operating a refrigeration system.
  • Refrigeration systems of the generic type are often referred to as composite refrigeration systems.
  • Such (composite) refrigeration systems are operated, for example, in supermarkets. They supply there in general a variety of refrigeration consumers, such as refrigerators, refrigerators and freezers. For this purpose circulates in them a one- or multi-component refrigerant or refrigerant mixture.
  • Such a (composite) refrigeration system has - as shown in the figure - a capacitor V, in which the pressurized refrigerant is condensed by indirect heat exchange, preferably against outside air.
  • the liquid refrigerant from the condenser V is supplied via line 1 to an optional collector S1.
  • an optional collector S1 Within a refrigeration system, so much refrigerant must always be present so that even with maximum refrigeration demand, the evaporator of all refrigeration consumers can be filled. However, since individual vaporizers are only partially filled or even completely empty with lower cooling demand, the excess refrigerant must be collected during these times in the designated collector S1. From the collector S1, the refrigerant passes through the liquid lines 2 and 3 and 4 to the cold consumers of the normal cooling and deep-freezing cycle.
  • the consumers V1 and V2 shown in the figure for any number of consumers of the normal refrigeration cycle, while the consumers V3 and V4 shown in the figure represent any number of consumers of the freezing circuit.
  • Each refrigeration consumer V1 to V4 is preceded by an expansion valve a to d, in which the in the cold consumer or the evaporator or the cold consumer flowing refrigerant is relaxed.
  • the so-relaxed refrigerant is evaporated in the evaporators of the refrigerant consumers V1 to V4 and thus cools the corresponding refrigeration cabinets and rooms.
  • the vaporized in the Kälte Toothem V1 and V2 of the normal refrigeration cycle refrigerant is supplied via a suction line 5 to the suction collecting container S2 of the normal refrigeration cycle.
  • This Saugsammel faceder S2 is connected upstream of the compressor unit of the normal cooling circuit. In principle, however, can again be dispensed with such Saugsammel practicer.
  • the compressor unit of the normal cooling circuit is formed in one stage only and has a plurality, preferably three parallel compressors; For the sake of clarity, only two compressors C1 and C2 connected in parallel are shown in the figure.
  • the consumers V3 and V4 of the freezing circuit via the liquid line 4 supplied refrigerant is supplied via the suction line 10 to the low-pressure suction collecting container S3 of the compressor unit of the freezing circuit.
  • the compressor unit of the deep-freeze circuit is preferably formed in at least two stages, again for the sake of clarity, each compressor stage is represented by two parallel compressors C3 and C5 and C4 and C6.
  • the compressors C3 and C5 of the first compressor stage suck via the lines 11 and 12 gaseous refrigerant from the low pressure suction collecting tank S3 and convey the compressed to an intermediate pressure refrigerant via line 13 in the intermediate pressure suction collecting container S4.
  • the compressors C4 and C6 suck the second compressor stage via the lines 14 and 15 and refrigerant then convey the compressed refrigerant via the pressure line 16 also before the already mentioned desuperheater E in the line.
  • the compressor unit of the freezing circuit can also be formed in three or more stages; In this case, the individual compressor stages would possibly be preceded by separate suction collection containers, if appropriate.
  • the refrigeration system is operated in a so-called energy-saving mode.
  • energy-saving operation in this case those operating conditions are to be understood in which at the cooling furniture down the night blinds or drove over, the lights are off, the refrigerator doors are no longer open and thus no flow of goods - ie the removal or cross of goods or in the refrigerated cabinets or cold rooms - more takes place.
  • the cooling demand is often so low during these times that it comes in the compressor unit of the normal cooling circuit to a so-called.
  • Pump-down circuit is the suction of the evaporator of the refrigerated consumer to understand. This has the consequence that on the one hand cooling points with a low cooling demand, the target temperatures no longer reach and on the other hand, the switching frequency of the compressor of the normal cooling circuit unnecessarily and undesirably increases. However, this increase in switching frequency leads to a reduction in the life of the compressor.
  • Object of the present invention is to provide a refrigeration system and a method for operating a refrigeration system of the generic type, in which or in which the mentioned disadvantages are avoided.
  • a refrigeration system which is characterized in that the suction side of the normal refrigeration cycle is in operative connection with the or one of the intermediate pressure sides of the freezing circuit.
  • An operative connection between the suction side of the normal cooling circuit and the or one of the intermediate pressure sides of the deep-freeze circuit is according to an advantageous Implementation of the refrigeration system according to the invention realized via at least one connecting line.
  • the inventive method for operating a refrigeration system is characterized in that the suction side of the normal cooling circuit is in operative connection with the or one of the intermediate pressure sides of the freezing circuit.
  • a further embodiment of the refrigeration system according to the invention is characterized in that an oil compensation line 21 connecting the suction collecting container S2 of the normal refrigeration cycle and the one or the intermediate pressure suction collecting container S4 of the freezing circuit is provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Claims (9)

  1. Système frigorifique comprenant au moins un circuit de refroidissement normal et au moins un circuit de surgélation, les circuits étant connectés l'un avec l'autre et un seul condenseur étant prévu et les circuits de surgélation présentant une unité de compresseur au moins à deux étages, caractérisé en ce que le côté admission du circuit de refroidissement normal est en liaison active avec le ou l'un des côtés de pression intermédiaire du circuit de surgélation.
  2. Système frigorifique selon la revendication 1, caractérisé en ce que la liaison active entre le côté admission du circuit de refroidissement normal et le ou l'un des côtés de pression intermédiaires du circuit de surgélation est réalisé au moyen d'au moins une conduite de liaison (20).
  3. Système frigorifique selon la revendication 1 ou 2, caractérisé en ce que des récipients collecteurs d'admission (S2, S4) sont branchés en amont d'au moins un étage de compresseur du circuit de refroidissement normal et d'un étage de compresseur du circuit de surgélation, sachant qu'il ne s'agit pas du premier étage de compresseur et au moins le réservoir collecteur d'admission (S2) du circuit de refroidissement normal étant en liaison active avec le ou l'un des réservoirs collecteurs d'admission à pression intermédiaire (S4) du circuit de surgélation.
  4. Système frigorifique selon la revendication 3, caractérisé en ce que la liaison active entre le réservoir collecteur d'admission (S2) du circuit de refroidissement normal et le réservoir collecteur d'admission à pression intermédiaire (S4) du circuit de surgélation est réalisé au moyen d'au moins une conduite de liaison (20).
  5. Système frigorifique selon l'une quelconque des revendications 3 ou 4, caractérisé en ce qu'il est prévu une conduite de compensation d'huile (21) reliant le réservoir collecteur d'admission (S2) du circuit de refroidissement normal et le réservoir collecteur d'admission à pression intermédiaire (S4) du circuit de surgélation.
  6. Système frigorifique selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un organe d'arrêt (de préférence une vanne) est prévu dans la conduite de liaison (20) et/ou la conduite de compensation d'huile (21).
  7. Système frigorifique selon l'une quelconque des revendications 3 à 6, caractérisé en ce que la fonction du réservoir collecteur d'admission (S2) du circuit de refroidissement normal et du réservoir collecteur d'admission à pression intermédiaire (S4) du circuit de surgélation est réalisée dans un réservoir collecteur d'admission.
  8. Procédé pour l'exploitation d'un système frigorifique selon l'une quelconque des revendications précédentes, caractérisé en ce que le côté admission du circuit de refroidissement normal est en liaison active avec le ou l'un des côtés de pression intermédiaire du circuit de surgélation.
  9. Procédé selon la revendication 8, caractérisé en ce que les compresseurs du circuit de refroidissement normal sont déconnectés pendant l'exploitation de nuit et/ou l'exploitation de fermeture de magasin.
EP00109559A 1999-05-05 2000-05-04 Système frigorifique et procédé de fonctionnement d'un système frigorifique Expired - Lifetime EP1050723B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19920734A DE19920734A1 (de) 1999-05-05 1999-05-05 Kälteanlage und Verfahren zum Betreiben einer Kälteanlage
DE19920734 1999-05-05

Publications (3)

Publication Number Publication Date
EP1050723A2 EP1050723A2 (fr) 2000-11-08
EP1050723A3 EP1050723A3 (fr) 2002-08-14
EP1050723B1 true EP1050723B1 (fr) 2007-01-03

Family

ID=7907090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00109559A Expired - Lifetime EP1050723B1 (fr) 1999-05-05 2000-05-04 Système frigorifique et procédé de fonctionnement d'un système frigorifique

Country Status (4)

Country Link
EP (1) EP1050723B1 (fr)
AT (1) ATE350629T1 (fr)
DE (2) DE19920734A1 (fr)
ES (1) ES2280159T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1340949A4 (fr) * 2000-12-08 2009-08-12 Daikin Ind Ltd Refrigerateur
DE10131473A1 (de) * 2001-06-29 2003-01-09 Linde Ag Kälteanlage und Verfahren zum Betreiben einer Kälteanlage
DE102004038640A1 (de) * 2004-08-09 2006-02-23 Linde Kältetechnik GmbH & Co. KG Kältekreislauf und Verfahen zum Betreiben eines Kältekreislaufes
WO2007142619A2 (fr) * 2006-06-01 2007-12-13 Carrier Corporation Unité de compresseur à étages multiples pour système de réfrigération
DE102014100917A1 (de) * 2014-01-27 2015-07-30 Bitzer Kühlmaschinenbau Gmbh Kälteanlage

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151469A (en) * 1961-10-02 1964-10-06 Lester K Quick Heat reclaiming system
US3638444A (en) * 1970-02-12 1972-02-01 Gulf & Western Metals Forming Hot gas refrigeration defrost structure and method
US3675441A (en) * 1970-11-19 1972-07-11 Clark Equipment Co Two stage refrigeration plant having a plurality of first stage refrigeration systems
US4055963A (en) * 1975-06-25 1977-11-01 Daikin Kogyo Co., Ltd. Heating system
CA1062927A (fr) * 1978-01-09 1979-09-25 Emhart Industries Systeme de refrigeration utilisant un refrigerant gazeux sature pour le degivrage
FR2513747A1 (fr) * 1981-09-25 1983-04-01 Satam Brandt Froid Installation frigorifique a multimotocompresseurs
JPS58178158A (ja) * 1982-04-14 1983-10-19 株式会社日立製作所 ヒ−トポンプ装置
US4947655A (en) * 1984-01-11 1990-08-14 Copeland Corporation Refrigeration system
US5522233A (en) * 1994-12-21 1996-06-04 Carrier Corporation Makeup oil system for first stage oil separation in booster system

Also Published As

Publication number Publication date
DE19920734A1 (de) 2000-11-09
ATE350629T1 (de) 2007-01-15
DE50013917D1 (de) 2007-02-15
EP1050723A2 (fr) 2000-11-08
EP1050723A3 (fr) 2002-08-14
ES2280159T3 (es) 2007-09-16

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