EP3737896A1 - Cooling circuit section and cooling circuit - Google Patents

Cooling circuit section and cooling circuit

Info

Publication number
EP3737896A1
EP3737896A1 EP18706187.4A EP18706187A EP3737896A1 EP 3737896 A1 EP3737896 A1 EP 3737896A1 EP 18706187 A EP18706187 A EP 18706187A EP 3737896 A1 EP3737896 A1 EP 3737896A1
Authority
EP
European Patent Office
Prior art keywords
oil
refrigerant
cooling circuit
oil separator
compressor
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.)
Pending
Application number
EP18706187.4A
Other languages
German (de)
English (en)
French (fr)
Inventor
Nicolas Pondicq-Cassou
Philippe GASTALDI
Micael ANTONSSON
Barnabe LANDRON
Sascha HELLMANN
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 EP3737896A1 publication Critical patent/EP3737896A1/en
Pending legal-status Critical Current

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
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • F25B31/004—Lubrication oil recirculating arrangements
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • 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
    • 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
    • F25B2400/23—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
    • F25B2500/00—Problems to be solved
    • F25B2500/16—Lubrication
    • 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
    • F25B2600/2513—Expansion valves

Definitions

  • an individual oil separator comprising an inlet fluidically connected to the compressor so as to receive the compressed refrigerant from the compressor, each individual oil separator being configured to separate a first fraction of oil from the compressed refrigerant,
  • the cooling circuit section further comprising a common oil separator fluidically connected to the refrigerant outlet of each individual oil separator so as to receive the compressed refrigerant from each of the compressor assemblies, the common oil separator being configured to separate a second fraction of oil from the compressed refrigerant.
  • such a cooling circuit section may comprise one or several of the following features, taken in any technically possible combination:
  • the heat exchanger device is a condenser configured to cool the refrigerant such that the refrigerant condenses into a liquid state
  • figure 2 is a schematic diagram of an individual oil separator of the cooling circuit of figure 1.
  • each compressor assembly 30 is fluidically connected in parallel. More particularly, each compressor assembly 30 is fluidically connected to the inlet tube 20 of the cooling circuit section 2 such that it receives at least a portion of the refrigerant circulating in the inlet tube 20.
  • Each compressor assembly 30 comprises a compressor 40, an individual oil separator 42 and an individual feedback tube 44.
  • the second pressure depends typically on the ambient air condition.
  • the second pressure is for example comprised between 45 and 130 bar.
  • the individual oil separator 42 is configured to separate a first fraction of the oil contained in the compressed refrigerant and for returning this first fraction of oil into the compressor 40 through the individual feedback tube 44.
  • the compressed refrigerant exiting the individual oil separator still comprises oil. More particularly, the amount of oil remaining in the compressed refrigerant corresponds to the amount of oil in the compressed refrigerant entering the individual oil separator 42 reduced by the first fraction of oil removed by the individual oil separator 42.
  • the individual oil separator 42 is configured to separate the oil from the refrigerant based on the differences in the densities of the refrigerant and the oil.
  • the individual feedback tube 44 comprises an expansion device 63 configured to decrease the pressure of the first fraction of oil from the second pressure to the first pressure.
  • the expansion device is an expansion valve.
  • any other adapted expansion device may be used, for example a capillary tube.
  • the common oil separator 32 comprises an inlet 70, fluidically connected to the compressor assemblies 30 so as to receive the compressed refrigerant from the compressor assemblies 30, a separation unit (not shown), configured to separate a second fraction of oil from the compressed refrigerant, a refrigerant outlet 72, through which the compressed refrigerant is intended to be discharged from the common oil separator 32 after separation of the second fraction of oil, and an oil outlet 74, through which the second fraction of oil is intended to be discharged from the common oil separator 32. More particularly, the refrigerant outlet 72 is fluidically connected with the outlet tube 22 of the cooling circuit section.
  • the common oil separator 32 is, for example, a coalescence oil separator.
  • the coalescence oil separator is an oil separator configured to operate according to the coalescence principle.
  • the coalescence principle is the accumulation of droplets of two identical substances which are dispersed in a fluid by reunification of the identical substances.
  • the oil outlet 62 of the common oil separator 32 is fluidically connected, via the common feedback tube 76, to the inlet tube 20 of the cooling circuit section 2.
  • the heat exchanger device 80 is configured to cool the refrigerant.
  • the heat exchanger device 80 is configured to reject heat from the refrigerant into the environment of the heat exchanger device 80.
  • the refrigerant at the outlet 84 has a temperature strictly smaller than a temperature of the refrigerant at the inlet 83.
  • the evaporator device 82 is configured to evaporate the refrigerant by heat exchange between the refrigerant circulating through the evaporator device 82, and more particularly in the heat exchange tubes, and a cooling volume (not represented).
  • the cooling volume is for example an inside of a refrigerator, a freezer, a cooling cabinet such as multideck cabinet, for example in a supermarket, or self-service counter, for example in a supermarket, a cold room or a refrigerated warehouse.
  • the compressors 40 For example, if one of the compressors 40 operates at a high frequency, a high amount of oil is released into the compressed refrigerant in this compressor 40.
  • the corresponding individual oil separator 42 is then configured to feed back this large amount of oil directly into the corresponding compressor 40, in order to ensure that the compressor 40 disposes of enough oil for lubrication.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Compressor (AREA)
EP18706187.4A 2018-01-12 2018-01-12 Cooling circuit section and cooling circuit Pending EP3737896A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/050770 WO2019137618A1 (en) 2018-01-12 2018-01-12 Cooling circuit section and cooling circuit

Publications (1)

Publication Number Publication Date
EP3737896A1 true EP3737896A1 (en) 2020-11-18

Family

ID=61249597

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18706187.4A Pending EP3737896A1 (en) 2018-01-12 2018-01-12 Cooling circuit section and cooling circuit

Country Status (4)

Country Link
US (1) US20200333053A1 (zh)
EP (1) EP3737896A1 (zh)
CN (1) CN111566418A (zh)
WO (1) WO2019137618A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11585608B2 (en) * 2018-02-05 2023-02-21 Emerson Climate Technologies, Inc. Climate-control system having thermal storage tank
US11149971B2 (en) 2018-02-23 2021-10-19 Emerson Climate Technologies, Inc. Climate-control system with thermal storage device
US11346583B2 (en) * 2018-06-27 2022-05-31 Emerson Climate Technologies, Inc. Climate-control system having vapor-injection compressors

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4506523A (en) 1982-11-19 1985-03-26 Hussmann Corporation Oil separator unit
JPH06221695A (ja) * 1993-01-21 1994-08-12 Mitsubishi Heavy Ind Ltd 圧縮ユニット
JP2001324236A (ja) * 2000-05-19 2001-11-22 Fujitsu General Ltd 空気調和機
JP3478292B2 (ja) * 2002-05-28 2003-12-15 ダイキン工業株式会社 冷凍装置の圧縮機構
US20070214827A1 (en) * 2006-03-20 2007-09-20 Chadalavada Venkatasubramaniam Oil-free refrigerant circulation technology for air-conditioning and refrigeration system
KR101380036B1 (ko) * 2007-10-25 2014-04-01 엘지전자 주식회사 공기 조화기

Also Published As

Publication number Publication date
WO2019137618A1 (en) 2019-07-18
CN111566418A (zh) 2020-08-21
US20200333053A1 (en) 2020-10-22

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