AT520000A3 - Refrigerant circuit of a refrigeration system with an arrangement for defrosting a heat exchanger and method for operating the refrigerant circuit - Google Patents

Refrigerant circuit of a refrigeration system with an arrangement for defrosting a heat exchanger and method for operating the refrigerant circuit Download PDF

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Publication number
AT520000A3
AT520000A3 ATA50400/2018A AT504002018A AT520000A3 AT 520000 A3 AT520000 A3 AT 520000A3 AT 504002018 A AT504002018 A AT 504002018A AT 520000 A3 AT520000 A3 AT 520000A3
Authority
AT
Austria
Prior art keywords
heat exchanger
refrigerant circuit
defrosting
evaporation pressure
refrigerant
Prior art date
Application number
ATA50400/2018A
Other languages
German (de)
Other versions
AT520000A2 (en
AT520000B1 (en
Inventor
Bartzsch Ralf
Original Assignee
kke 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 kke GmbH filed Critical kke GmbH
Publication of AT520000A2 publication Critical patent/AT520000A2/en
Publication of AT520000A3 publication Critical patent/AT520000A3/en
Application granted granted Critical
Publication of AT520000B1 publication Critical patent/AT520000B1/en

Links

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
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
    • 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
    • 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
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • F25B2347/021—Alternate 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
    • 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
    • F25B2400/072—Intercoolers therefor
    • 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
    • F25B2400/13—Economisers
    • 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
    • F25B2400/23—Separators
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Defrosting Systems (AREA)

Abstract

Die Erfindung betrifft einen Kältemittelkreislauf (1a, 1b) einer Kälteanlage mit einer Anordnung zum Abtauen mindestens eines Wärmeübertragers mit Kältemittel. Der Kältemittelkreislauf (1a, 1b) weist mindestens zwei Verdampfungsdruckstufen auf, wobei eine erste, untere Verdampfungsdruckstufe und eine zweite, obere Verdampfungsdruckstufe jeweils mit mindestens einem Verdichter (2, 4) und mindestens einem als Verdampfer betreibbaren Wärmeübertrager (9, 16) mit vorgelagertem Expansionsorgan (8, 15) ausgebildet sind. Die Wärmeübertrager (9, 16) der unterschiedlichen Verdampfungsdruckstufen sind mit Kältemittel auf unterschiedlichen Druckniveaus beaufschlagbar angeordnet. Die Anordnung zum Abtauen weist eine Verbindungsleitung (21) zum Leiten von Kältemittel auf gleichbleibendem Druckniveau auf, welche sich von einer an einem Auslass des mindestens einen Verdichters (2) der ersten, unteren Verdampfungsdruckstufe ausgebildeten Abzweigstelle (19) bis zu einer an einem Einlass des mindestens einen als Verdampfer betreibbaren Wärmeübertragers (9) der zweiten, oberen Verdampfungsdruckstufe ausgebildeten Mündungsstelle (24a) erstreckt. Die Wärmeübertrager (9, 16) sind eindirektional durchströmbar angeordnet. Die Erfindung betrifft zudem ein Verfahren zum Betreiben des Kältemittelkreislaufs (1a, 1b) in einem Abtaumodus zum Abtauen mindestens eines in einem Kühlmodus zur Wärmeaufnahme als Verdampfer betriebenen Wärmeübertragers (9) der oberen Verdampfungsdruckstufe.The invention relates to a refrigerant circuit (1a, 1b) of a refrigeration system with an arrangement for defrosting at least one heat exchanger with refrigerant. The refrigerant circuit (1a, 1b) has at least two evaporation pressure stages, wherein a first, lower evaporation pressure stage and a second, upper evaporation pressure stage each with at least one compressor (2, 4) and at least one operable as an evaporator heat exchanger (9, 16) with upstream expansion element (8, 15) are formed. The heat exchangers (9, 16) of the different evaporation pressure stages are arranged to be acted upon with refrigerant at different pressure levels. The defrosting arrangement comprises a connecting line (21) for conducting refrigerant at a constant pressure level, which extends from a branching point (19) formed at an outlet of the at least one compressor (2) of the first, lower evaporation pressure stage to one at an inlet of the extends at least one operable as an evaporator heat exchanger (9) of the second, upper evaporation pressure stage formed opening point (24a). The heat exchanger (9, 16) are arranged unidirectionally throughflow. The invention also relates to a method for operating the refrigerant circuit (1a, 1b) in a defrosting mode for defrosting at least one heat exchanger (9) of the upper evaporation pressure stage operated as evaporator in a cooling mode for heat absorption.

ATA50400/2018A 2017-05-16 2018-05-14 Refrigerant circuit of a refrigeration system with an arrangement for defrosting a heat exchanger and method for operating the refrigerant circuit AT520000B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017110560.3A DE102017110560B4 (en) 2017-05-16 2017-05-16 Refrigerant circuit of a refrigeration system with an arrangement for defrosting a heat exchanger and a method for operating the refrigerant circuit

Publications (3)

Publication Number Publication Date
AT520000A2 AT520000A2 (en) 2018-12-15
AT520000A3 true AT520000A3 (en) 2019-01-15
AT520000B1 AT520000B1 (en) 2019-10-15

Family

ID=64278046

Family Applications (1)

Application Number Title Priority Date Filing Date
ATA50400/2018A AT520000B1 (en) 2017-05-16 2018-05-14 Refrigerant circuit of a refrigeration system with an arrangement for defrosting a heat exchanger and method for operating the refrigerant circuit

Country Status (2)

Country Link
AT (1) AT520000B1 (en)
DE (1) DE102017110560B4 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11035599B2 (en) * 2019-07-02 2021-06-15 Heatcraft Refrigeration Products Llc Cooling system
DE102020107652A1 (en) 2020-03-19 2021-09-23 Audi Aktiengesellschaft Method for defrosting an external heat exchanger, operated as an air heat pump, of a refrigeration system for a motor vehicle, refrigeration system and motor vehicle with such a refrigeration system
JP2022045699A (en) * 2020-09-09 2022-03-22 富士通株式会社 Cooling device, electronic apparatus, and cooling method
EP4303503A1 (en) * 2022-07-05 2024-01-10 Carrier Corporation Multi-compartment transport refrigeration system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0155605A2 (en) * 1984-03-21 1985-09-25 Hans Erik Evald Olson Method for defrosting and device for the implementation of said method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234753A (en) * 1963-01-03 1966-02-15 Lester K Quick Hot gas refrigeration defrosting system
US3184926A (en) * 1963-10-10 1965-05-25 Ray Winther Company Refrigeration system
DE10332859A1 (en) 2003-07-18 2005-02-10 Linde Kältetechnik GmbH & Co. KG Hot gas defrosting for refrigeration systems
EP2496893B1 (en) * 2009-11-06 2019-01-02 Carrier Corporation Refrigerating circuit and method for selectively defrosting cold consumer units of a refrigerating circuit
WO2013078088A1 (en) 2011-11-21 2013-05-30 Hill Phoenix, Inc. C02 refrigeration system with hot gas defrost

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0155605A2 (en) * 1984-03-21 1985-09-25 Hans Erik Evald Olson Method for defrosting and device for the implementation of said method

Also Published As

Publication number Publication date
AT520000A2 (en) 2018-12-15
DE102017110560B4 (en) 2020-10-22
AT520000B1 (en) 2019-10-15
DE102017110560A1 (en) 2018-11-22

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