EP3244136A1 - Module réfrigérant - Google Patents

Module réfrigérant Download PDF

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Publication number
EP3244136A1
EP3244136A1 EP17170563.5A EP17170563A EP3244136A1 EP 3244136 A1 EP3244136 A1 EP 3244136A1 EP 17170563 A EP17170563 A EP 17170563A EP 3244136 A1 EP3244136 A1 EP 3244136A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
circuits
refrigerant
cooling module
refrigeration
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Withdrawn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
EP17170563.5A
Other languages
German (de)
English (en)
Inventor
Filip KITANOSKI
Dominik Radler
Florian Schilling
Andreas Presetschnik
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 Transportation Systems GmbH and Co KG
Original Assignee
Liebherr Transportation Systems GmbH and Co KG
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 Transportation Systems GmbH and Co KG filed Critical Liebherr Transportation Systems GmbH and Co KG
Publication of EP3244136A1 publication Critical patent/EP3244136A1/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Withdrawn legal-status Critical Current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
    • 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
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • 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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/02—Compression machines, plants or systems, with several condenser circuits 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
    • 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
    • F25B2400/06—Several compression cycles arranged in parallel

Definitions

  • the present invention relates to a cooling module, in particular a cooling module for a cooling device of a transport unit.
  • a cooling module serves to bring the air in a room to be conditioned to a desired temperature level by means of a refrigeration circuit refrigeration cycle and to keep it there.
  • the refrigeration cycle typically includes a compressor, a condenser, a throttle, and an evaporator connected in series.
  • a compressor arrangement is provided in a refrigeration circuit refrigeration cycle, in which two or more compressors are introduced parallel to each other in the refrigeration cycle.
  • Each of the compressors arranged parallel to each other is in fluid communication with one and the same refrigeration circuit.
  • the amount of refrigerant required is higher than in a conventional refrigeration cycle with only one compressor.
  • refrigerants with a high global warming potential are to be gradually reduced and are becoming increasingly less acceptable to end customers, it is advantageous to switch to refrigerants that have a lower GWP.
  • An alternative known to date is, for example, the group of combustible hydrocarbons, such as butane, propane and propene. Due to their flammability, it is essential to minimize the amount of refrigerant used in a refrigeration cycle. It is crucial for the safety of a refrigeration module how much refrigerant flows in a refrigeration cycle.
  • the refrigeration module comprises two refrigeration circuits whose respective refrigerant circuit is separated from each other.
  • the cooling module is characterized in that the refrigerant circuits of the two refrigerant circuits run separately from each other through a common heat exchanger.
  • the invention provides for at least two refrigeration circuits whose respective refrigerant circuits are separated from one another and which run separately from one another through a common heat exchanger.
  • the cooling module according to the invention in the operation of only one of the plurality of refrigerant circuits on a disproportionately large heat transfer surface for heat exchange. This results in an optimal heat exchange for the one operated refrigerant circuit, so that the overall efficiency of the system when operating only one of the multiple circuits is particularly high or two separate heat exchangers, the high overall efficiency results from the disproportionately high common associated air flow.
  • the amount of refrigerant Ipro refrigeration circuit decreases compared to a refrigeration cycle by a compressor assembly is provided with a plurality of mutually parallel compressors for a refrigeration cycle. In this way, in the event of a leak, the amount of a released refrigerant of a refrigeration cycle can be minimized. The reduction of the liberated refrigerant can therefore contribute to increased reliability.
  • the provision of two self-sufficient refrigeration circuits in a refrigeration module also leads to a lower overall failure probability of the module, since the refrigeration circuits are redundant.
  • the common heat exchanger has at least two inlets for the inflow of a fluid, in particular a refrigerant, and at least two outlets for the outflow of a fluid, wherein a first of the inlets has a first fluid connection through the heat exchanger to a first of the outlets , another of the inlets has a further fluid connection through the heat exchanger to another of the outlets, and each fluid connection is separated from the other fluid connections.
  • the common heat exchanger for the at least two refrigerant circuits is further specified.
  • the heat exchanger comprises at least two inlets and at least two outlets, so that the at least two refrigeration circuits can run through the common heat exchanger without the refrigerant circuits having a common fluid connection.
  • one of the refrigerant circuits passes through the first fluid connection of the common heat exchanger and the other of the at least two refrigerant circuits through a further fluid connection of the common heat exchanger.
  • the entire heat exchanger with its effective area is available to the other refrigerant circuit.
  • the heat exchange is then particularly effective, since the useful area for heat exchange increases. Since non-operated refrigerant circuits do not use their share of the heat exchange capacity of the heat exchanger, this can be used by the active circuit.
  • the common heat exchanger has a plurality of heat conducting elements, in particular heat conducting fins or heat conducting fins, which contacts a casing of the first fluid connection as well as a casing of all other fluid connections, preferably at least one of the heat conducting elements or all heat conducting elements both the piping of the first fluid connection as well as the piping contact all other fluid connection.
  • the common heat exchanger has a plurality of parallel tube elements, preferably rectilinear tube elements, for flowing a fluid and at least one perpendicular to the longitudinal direction of the plurality of tube elements connecting surface, are connected to each other via fluid-connecting elements parallel to each other tube elements.
  • a fluid connection element is substantially U-shaped and serves to connect rectilinear pipe elements so that a fluid, for example a refrigerant, can meander through a plurality of the pipe elements.
  • the parallel tube elements typically serve to receive the refrigerant.
  • a heat exchanger has a plurality of parallel, with refrigerant flowed through tubular elements in order to allow a good heat exchange with a flowing past the surface of the tube elements medium (typically air).
  • the numerous parallel tube elements are at a certain distance from each other and are at their End sides connected via fluid-connecting elements to each other so that the refrigerant is meandered through the heat exchanger. Since the invention provides for carrying out a plurality of cooling circuits through a common heat exchanger, it is appropriate to equip the perpendicular to the rectilinear pipe elements connecting surface with fluid-connecting elements.
  • a matrix arrangement describes nothing more than a plurality of arranged parallel to the connecting surface parallel pipe elements, each pipe element is locally identifiable by the specification of a row and the associated column among the plurality of tubular elements.
  • the fluid connection elements are preferably arranged on the at least one connection surface in such a way that, when viewed from above the at least one connection surface, the two separate cooling circuits comprise mutually spaced pipe elements, in particular every second row or every second column of pipe elements is associated with one of the two cooling circuits.
  • the fluid connection elements are arranged on the at least one connection surface such that, when viewed from above the at least one connection surface, the two separate refrigeration circuits are offset from one another, in particular one of the two refrigeration circuits defines a first region and the other the two refrigeration circuits defined another area that has no overlap with the first area on the connection surface.
  • each of the refrigeration circuits comprises its own compressor and its own throttle.
  • the throttle is typically used to separate the high-pressure region from a low-pressure region in a refrigeration cycle, the high-pressure region extending from the outlet of the compressor to the throttle.
  • the heat exchanger is an air-refrigerant heat exchanger. This means that the heat exchange between a refrigerant and an air takes place.
  • a refrigerant flowing inside the heat exchanger is cooled or heated by means of an air flow.
  • the air to be conditioned is reduced in its temperature and an ambient air is used to carry off the heat energy arising at the condenser.
  • the heat exchanger is a condenser
  • the cooling module preferably has a condenser fan, with which the condenser can be acted upon with air.
  • the heat exchanger is an evaporator
  • the cooling module preferably has an evaporator fan, with which the evaporator can be acted upon with air.
  • Both the condenser and the evaporator in a refrigeration module can be provided as a common heat exchanger for the at least two refrigeration circuits.
  • the individual components of a respective refrigeration cycle are connected to refrigerant lines, so that a refrigerant circuit is formed.
  • the cooling module is a module for a cooling device of a transport unit, in particular a refrigerated semitrailer, a refrigerated trailer or a refrigerated transport container.
  • Fig. 1 2 shows three separate refrigerant circuits 2, 3 with their respective refrigerant circuits 4, 5.
  • the two refrigerant circuits 4, 5 have no connection point with each other, so that a refrigerant flowing therein does not enter another refrigeration cycle 2, 3 can.
  • a condenser 6 downstream of the respective compressor 10, 11, a condenser 6 can be seen, which has two inlets 61, 62 and two outlets 63, 64 in the flow direction. At this time, the first refrigerant circuit 4 flows into the first inlet 61 of the condenser 6 and leaves the condenser 6 through the first outlet 63.
  • each of the plurality of refrigerant circuits 4, 5 passes a throttle 12, 13 and thereafter flows into an evaporator 7.
  • the evaporator 7 has two inlets 71, 72 and two outlets 73, 74, wherein each of the refrigerant circuits 4, 5 flows into a different inlet 71, 72 and flows out of a different outlet 73, 74 of the evaporator 7 before the refrigerant flowing in the respective refrigerant circuit 4, 5 is supplied again to the associated compressor 10, 11.
  • Both the condenser 6 and the evaporator 7 have an associated fan 8, 9, which provides an air flow for heat transfer to the condenser 6 or evaporator 7.
  • each compressor 10, 11 is assigned a closed refrigeration cycle.
  • Each of these circuits is connected to the common heat exchanger (evaporator 7 or condenser 6) so that the circuits have a maximum heat exchange with the environment, even if only one of the compressors is in operation. This ensures efficiency gains in the operation of only one refrigeration cycle.
  • Figs. 2a to c show different Verschaltungstinen an air-refrigerant evaporator, 7 with two separate circuits.
  • Fig. 2a shows a system in which every other row is assigned to the heat exchanger one of the two circuits.
  • Fig. 2b shows the arrangement of the two circuits one above the other, whereas Fig. 2c the arrangement of the two circuits in a row represents. In this case, the direction of air flow from left to right in the illustrated drawings is assumed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
EP17170563.5A 2016-05-13 2017-05-11 Module réfrigérant Withdrawn EP3244136A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016005956.7A DE102016005956A1 (de) 2016-05-13 2016-05-13 Kältemodul

Publications (1)

Publication Number Publication Date
EP3244136A1 true EP3244136A1 (fr) 2017-11-15

Family

ID=58701509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17170563.5A Withdrawn EP3244136A1 (fr) 2016-05-13 2017-05-11 Module réfrigérant

Country Status (2)

Country Link
EP (1) EP3244136A1 (fr)
DE (1) DE102016005956A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202018004422U1 (de) 2018-09-25 2018-10-11 Edgar Hakemann Steckerfertiges Kühlmöbel
CN112984864A (zh) * 2021-02-04 2021-06-18 上海伯涵热能科技有限公司 换热器制冷剂管路错排单级热泵模块及梯级热泵系统
CN116581428A (zh) * 2023-07-12 2023-08-11 宁德时代新能源科技股份有限公司 冷却系统及储能电站

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL106435C (fr) *
US4201065A (en) * 1978-12-18 1980-05-06 Carrier Corporation Variable capacity vapor compression refrigeration system
US5307645A (en) * 1991-07-02 1994-05-03 Pannell Bobby L Air conditioning system for a recreational vehicle
EP1140533A1 (fr) * 1998-11-16 2001-10-10 Autoclima S.P.A. Systeme de climatisation pour vehicules a moteur, avec deux circuits de refrigerant separes et independants et des echangeurs thermiques sur la meme conduite de debit d'air
JP2007127354A (ja) * 2005-11-04 2007-05-24 Toshiba Kyaria Kk 一体型空気調和装置
US20100107659A1 (en) * 2008-11-06 2010-05-06 Trane International Inc. Fixed and variable refrigerant metering system
JP2012042158A (ja) * 2010-08-20 2012-03-01 Arai Seisakusho Co Ltd 食品保存庫

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6553778B2 (en) * 2001-01-16 2003-04-29 Emerson Electric Co. Multi-stage refrigeration system
US8136363B2 (en) * 2005-04-15 2012-03-20 Thermo King Corporation Temperature control system and method of operating the same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL106435C (fr) *
US4201065A (en) * 1978-12-18 1980-05-06 Carrier Corporation Variable capacity vapor compression refrigeration system
US5307645A (en) * 1991-07-02 1994-05-03 Pannell Bobby L Air conditioning system for a recreational vehicle
EP1140533A1 (fr) * 1998-11-16 2001-10-10 Autoclima S.P.A. Systeme de climatisation pour vehicules a moteur, avec deux circuits de refrigerant separes et independants et des echangeurs thermiques sur la meme conduite de debit d'air
JP2007127354A (ja) * 2005-11-04 2007-05-24 Toshiba Kyaria Kk 一体型空気調和装置
US20100107659A1 (en) * 2008-11-06 2010-05-06 Trane International Inc. Fixed and variable refrigerant metering system
JP2012042158A (ja) * 2010-08-20 2012-03-01 Arai Seisakusho Co Ltd 食品保存庫

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202018004422U1 (de) 2018-09-25 2018-10-11 Edgar Hakemann Steckerfertiges Kühlmöbel
CN112984864A (zh) * 2021-02-04 2021-06-18 上海伯涵热能科技有限公司 换热器制冷剂管路错排单级热泵模块及梯级热泵系统
CN112984864B (zh) * 2021-02-04 2024-10-15 广州万二二麦工程技术有限公司 换热器制冷剂管路错排单级热泵模块及梯级热泵系统
CN116581428A (zh) * 2023-07-12 2023-08-11 宁德时代新能源科技股份有限公司 冷却系统及储能电站

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Publication number Publication date
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