EP1050724A2 - Système frigorifique - Google Patents

Système frigorifique Download PDF

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Publication number
EP1050724A2
EP1050724A2 EP00109556A EP00109556A EP1050724A2 EP 1050724 A2 EP1050724 A2 EP 1050724A2 EP 00109556 A EP00109556 A EP 00109556A EP 00109556 A EP00109556 A EP 00109556A EP 1050724 A2 EP1050724 A2 EP 1050724A2
Authority
EP
European Patent Office
Prior art keywords
refrigeration
refrigerant
evaporators
consumer
evaporator
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Withdrawn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
EP00109556A
Other languages
German (de)
English (en)
Other versions
EP1050724A3 (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.)
Linde GmbH
Original Assignee
Linde 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 Linde GmbH filed Critical Linde GmbH
Publication of EP1050724A2 publication Critical patent/EP1050724A2/fr
Publication of EP1050724A3 publication Critical patent/EP1050724A3/fr
Withdrawn legal-status Critical Current

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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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2501—Bypass valves
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • 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

Definitions

  • the invention relates to a refrigeration system for cooling at least one refrigeration consumer by means of a normal cooling circuit and / or a freezing circuit with at least one compressor unit and at least one condenser, in which each the cooling consumer is preceded by an expansion valve.
  • Refrigeration systems are operated, for example, in supermarkets. They supply in there general a variety of refrigeration consumers, such as cold rooms, refrigeration and Freezer. For this purpose, a one- or multi-component circulates in them Refrigerant or refrigerant mixture.
  • a refrigeration system like that from the DE-PS 39 28 430 is known - has a condenser in which the under pressure standing refrigerants through indirect heat exchange, preferably against outside air, is condensed.
  • the liquid refrigerant from the condenser is fed to a collection container.
  • a collection container There must always be as much refrigerant in a refrigeration system as it does at maximum cooling demand, the evaporators of all cooling consumers are filled can. However, since individual evaporators are only partially used when cooling is low are filled or even completely empty, the excess refrigerant must during these times are collected in the designated container.
  • the refrigerant is fed to the refrigeration consumers from the collection container.
  • Each The cooling consumer is an expansion device, preferably an expansion valve upstream, in which the in the cold consumer or the or Evaporator of the refrigerant flowing refrigerant is relaxed. That so expanded refrigerant is evaporated in the evaporators of the refrigerant consumers and thus cools the corresponding refrigeration furniture and rooms.
  • the refrigerant evaporated in this way is then passed through a suction line Compressor unit supplied.
  • These compressor units can have one or more stages be trained.
  • the individual compressor stages usually have several in parallel switched compressor. These compress and convey the refrigerant a riser in turn to the previously mentioned condenser. While the Compressor unit normally in one, in the basement one Is located in the supermarket, the condenser is on the roof of the supermarket.
  • Refrigeration system or the evaporators arranged in the refrigeration consumers must be in are defrosted at regular intervals because of frosting or icing on the Evaporators lead to a reduction in the efficiency of the evaporators.
  • a Defrosting is the so-called electrical defrost. With this the Evaporator defrosted by means of heaters arranged on and / or in them. This However, the procedure leads to an undesirable increase in electrical consumption Energy.
  • So-called compressed gas defrosting is an alternative to the electrical defrosting described on.
  • the one Has temperature between 35 ° C and 45 ° C, from the collection container Evaporators or evaporator groups supplied.
  • the installation effort for this Pressurized gas defrosting is, however, comparatively high, since for every evaporator or a separate pressurized gas line must be provided for each evaporator group.
  • the object of the present invention is to provide a refrigeration system of the generic type specify that avoids this disadvantage.
  • a refrigeration system which is thereby is distinguished by the fact that at least one of the cold consumers also has a directly controlled one Solenoid valve to the corresponding expansion valve of the refrigeration consumer is arranged in parallel.
  • the refrigeration system according to the invention is based on the embodiment shown in the figure explained in more detail.
  • the figure shows a refrigeration consumer V of a normal cooling or freezing cycle, an expansion valve a, via which the refrigerant in the evaporator in cooling mode is injected, assigned or upstream.
  • every cold consumer is an expansion valve upstream of the refrigeration system, in which the in the Cold consumer or the evaporator or the evaporator of the cold consumer flowing Refrigerant is relaxed.
  • the refrigerant so relaxed is in the evaporators of the Refrigerant consumers evaporate and cool the corresponding refrigeration units and -spaces of the normal and / or deep-freeze circuit.
  • the refrigerant to be evaporated in the refrigeration consumer V is passed through a (collecting) liquid line 1 and a line 2 branching from this the expansion valve a and from this to the cold consumer V via a line 4.
  • the evaporated refrigerant is then again via a (collecting) suction line 5 Compressor unit cooling circuit not shown in the figure supplied
  • the direct operated solenoid valve b acts as a check valve when the coil is de-energized with an opening pressure of approx. 1.5 bar, which is due to the valve.
  • By closing of a solenoid valve at the corresponding defrost end temperature becomes defrosting power to those evaporators that do not yet have the final defrost temperature achieved.
  • An evaporator that has already been defrosted is therefore not unnecessary Refrigerant supplied, but only to those evaporators that have not yet are completely defrosted. This means that they reach the specified one in a shorter time End of defrost temperature.
  • the evaporators are operated simultaneously via the Extracted compressor of the normal and / or the freezer circuit. Once the Evaporator pressure drops lower than the temperature of the T (hermostatic) E (xpansions) V (entil) sensor refrigerant is automatically returned to the evaporator injected.

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)
  • Defrosting Systems (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
EP00109556A 1999-05-05 2000-05-04 Système frigorifique Withdrawn EP1050724A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29908042U DE29908042U1 (de) 1999-05-05 1999-05-05 Kälteanlage
DE29908042U 1999-05-05

Publications (2)

Publication Number Publication Date
EP1050724A2 true EP1050724A2 (fr) 2000-11-08
EP1050724A3 EP1050724A3 (fr) 2002-08-14

Family

ID=8073191

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00109556A Withdrawn EP1050724A3 (fr) 1999-05-05 2000-05-04 Système frigorifique

Country Status (2)

Country Link
EP (1) EP1050724A3 (fr)
DE (1) DE29908042U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103528135A (zh) * 2013-10-15 2014-01-22 美的集团股份有限公司 空调器及其控制方法
JP2015117902A (ja) * 2013-12-19 2015-06-25 東芝キヤリア株式会社 冷凍サイクル装置
US12007149B2 (en) 2021-08-20 2024-06-11 Carrier Corporation Expansion control system on a centrifugal chiller with an integral subcooler

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3928430C1 (fr) 1989-08-28 1991-03-07 Linde Ag, 6200 Wiesbaden, De

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184341A (en) * 1978-04-03 1980-01-22 Pet Incorporated Suction pressure control system
JP3136644B2 (ja) * 1991-05-16 2001-02-19 ダイキン工業株式会社 オフサイクルデフロスト装置
JPH05106944A (ja) * 1991-10-14 1993-04-27 Nippondenso Co Ltd 冷凍装置
JPH08159620A (ja) * 1994-12-08 1996-06-21 Nippon Kentetsu Co Ltd 冷凍冷蔵ショーケースの運転制御方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3928430C1 (fr) 1989-08-28 1991-03-07 Linde Ag, 6200 Wiesbaden, De

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103528135A (zh) * 2013-10-15 2014-01-22 美的集团股份有限公司 空调器及其控制方法
CN103528135B (zh) * 2013-10-15 2016-05-18 美的集团股份有限公司 空调器及其控制方法
JP2015117902A (ja) * 2013-12-19 2015-06-25 東芝キヤリア株式会社 冷凍サイクル装置
US12007149B2 (en) 2021-08-20 2024-06-11 Carrier Corporation Expansion control system on a centrifugal chiller with an integral subcooler

Also Published As

Publication number Publication date
DE29908042U1 (de) 1999-07-22
EP1050724A3 (fr) 2002-08-14

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