EP1696189A1 - Conditionneur d'air avec plusieurs compresseurs - Google Patents

Conditionneur d'air avec plusieurs compresseurs Download PDF

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Publication number
EP1696189A1
EP1696189A1 EP05004194A EP05004194A EP1696189A1 EP 1696189 A1 EP1696189 A1 EP 1696189A1 EP 05004194 A EP05004194 A EP 05004194A EP 05004194 A EP05004194 A EP 05004194A EP 1696189 A1 EP1696189 A1 EP 1696189A1
Authority
EP
European Patent Office
Prior art keywords
refrigerant
compressor
compressors
accumulator
air
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.)
Granted
Application number
EP05004194A
Other languages
German (de)
English (en)
Other versions
EP1696189B1 (fr
Inventor
Cheol-Min Kim
Eun-Jun Hyundai Hometown Apt. 102-1304 Cho
Yoon-Jei Hwang
Yun-Ho Ryu
Chan-Ho Song
Won-Hee Lee
Chang-Min Choi
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 LG Electronics Inc filed Critical LG Electronics Inc
Priority to EP05004194.6A priority Critical patent/EP1696189B1/fr
Publication of EP1696189A1 publication Critical patent/EP1696189A1/fr
Application granted granted Critical
Publication of EP1696189B1 publication Critical patent/EP1696189B1/fr
Not-in-force legal-status Critical Current
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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B43/006—Accumulators
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/001—Compression machines, plants or systems with reversible cycle not otherwise provided for with two or more accumulators
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel 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
    • 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
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors
    • F25B2400/0751—Details of compressors or related parts with parallel compressors the compressors having different capacities
    • 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

Definitions

  • the present invention relates to an air-conditioner and, more particularly, to an air-conditioner having four compressors and three accumulators.
  • a heat-pump type air-conditioner can be operable both for air-cooling and air-heating.
  • the heat-pump type air-conditioner can be used both as an air-cooling device and as an air-heating device by making a refrigerant of a refrigerating cycle to flow reversely.
  • Figure 1 shows the construction of a refrigerating cycle of the heat-pump type air-conditioner in accordance with a conventional art.
  • the conventional heat-pump type air-conditioner includes an indoor heat exchanger 102 installed indoors and performing air-cooling or air-heating, an outdoor heat exchanger 104 disposed outdoors and heat-exchanged with outdoor air; a four-way valve 106 for switching a flow of a refrigerant in a forward direction or a backward direction; an expansion valve 110 installed at a refrigerant pipe connecting the outdoor heat exchanger 104 and the indoor heat exchanger 102 and changing a refrigerant gas to have a low temperature and low pressure, compressors 112, 114, 116 and 118 for compressing a refrigerant to have a high temperature and high pressure, and an accumulator 130 connected to the compressors 112, 114, 116 and 118 by discharge pipes 120, 122, 124 and 126, separating the refrigerant into a gas and a liquid, and supplying the gaseous refrigerant to each compressor 112, 114, 116 and 118.
  • the compressors are the first compressor 112, the second compressor 114, the third compressor 116 and the fourth compressor 118, and check valves 140 are installed at discharge sides of each compressor 112, 114, 116 and 118 to prevent the refrigerant from flowing backward.
  • the accumulator 130 having a large capacity separates the refrigerant sucked through the refrigerant pipe 142 into a gas and a liquid and distributes the gaseous refrigerant to the first to fourth compressors 112, 114, 116 and 118.
  • the accumulator 130 includes a case 150 connected to the refrigerant pipe 142 through which the refrigerant is sucked thereinto and having a hermetic space, first to fourth discharge tubes 160, 162, 164 and 166 inserted for as long as a prescribed length into the case 150 from the lower side of the case 150 and supplying a gas refrigerant gasificated inside the case 150 to each compressor 112, 114, 116 and 118, a screen 152 installed at an upper portion inside the case 150, and a tube holder 154 for supporting the discharge tubes 160, 162, 164 and 166 inserted inside the case 150.
  • Oil contained in the refrigerant introduced through the refrigerant pipe 142 is stored at the side portion of the case 150, and oil retrieval holes 156 are formed respectively at one portion of the first to fourth discharge tubes 160, 162, 164. and 166. Accordingly, the oil stored at the lower portion of the case 150 is sucked into the oil retrieval holes 156 by virtue of a pressure of the refrigerant flowing in the first to fourth discharge tubes 160, 162, 164 and 166, and retrieved to each compressor 112, 114, 116 and 118, thereby performing a lubricating operation of the compressors.
  • first to fourth discharge tubes 160, 162, 164 and 166 which are respectively connected to the four compressors 112, 114, 116 and 118, are installed in one accumulator 130, the amount of oil sucked through each discharge tube 160, 162, 164 and 166 differs, and thus, some compressor(s) to which relatively less oil is retrieved can be damaged due to oil shortage.
  • one object of the present invention is to provide an air-conditioner having multiple compressors in which three accumulators are provided to uniformly supply oil to four compressors, thereby enhancing reliability of compressors.
  • Another object of the present invention is to provide an air-conditioner having multiple compressors capable of easily securing an installation space for three low-capacity small accumulators.
  • an air-conditioner having multiple compressors including: an indoor heat-exchanger disposed indoors and heat-exchanging indoor air; an outdoor heat-exchanger disposed outdoors and heat-exchanging a refrigerant with external air; an expansion valve installed at a refrigerant pipe connecting the indoor heat-exchanger and the outdoor heat-exchanger and changing the refrigerant to have a low temperature and low pressure; four compressors for compressing the refrigerant to change the refrigerant to have a high temperature and high pressure; and three accumulators disposed at a suction side of the four compressors and separating the refrigerant into a gas and a liquid to supply a gaseous refrigerant to the compressors.
  • the compressors are first, second, third and fourth compressors. Each compressor can have the same capacity or compressors with different capacities are applied at various rates.
  • the accumulators include a first accumulator for receiving the refrigerant and separating it into a gas and a liquid; a second accumulator connected to the first accumulator by a refrigerant pipe and connected to the first and second compressors; and a third accumulator connected to the first accumulator by a refrigerant pipe and connected to the third and fourth compressors.
  • the second accumulator is connected to the first compressor by a first pipe and to the second compressor by a second pipe, separates the refrigerant supplied to the first accumulator into a gas and a liquid, and supplies the gaseous refrigerant to the first and second compressors.
  • the third accumulator is connected to the third compressor by a third pipe and to the fourth compressor by a fourth pipe, separates the refrigerant supplied to the first accumulator into a gas and a liquid, and supplies the gaseous refrigerant to the third and fourth compressors.
  • Figure 3 shows the construction of a refrigerant cycle of a heat-pump type air-conditioner in accordance with the present invention.
  • the air-conditioner of the present invention includes an indoor heat-exchanger 2 disposed indoors and heat-exchanged with indoor air; outdoor heat-exchangers 4 and 6 disposed outdoors and heat-exchanged with external air; a four-way valve 8 for switching a flow of a refrigerant in a forward direction or a backward direction; compressors 20, 22, 24 and 26 for compressing the refrigerant to change it to have a high temperature and high pressure; and a plurality of accumulators 30, 32 and 35 for separating the refrigerant supplied to the compressors 20, 22, 24 and 26 into a gas and a liquid.
  • the outdoor heat-exchangers 4 and 6 are first outdoor heat exchanger 4 and second outdoor heat exchanger 6.
  • Expansion valves 10 are installed at refrigerant pipes 12 and 14 connecting the outdoor heat exchangers 4 and 6 and the indoor heat exchanger 2 in order to change the refrigerant to a low temperature and low pressure state.
  • the compressors refer to the first compressor 20, the second compressor 22, the third compressor 24 and the fourth compressor 26.
  • the compressors 20, 22, 24 and 26 may have the same capacity. Or, compressors having different capacities at several rates can be adopted.
  • Check valves 16 are installed at each discharge side of the compressors 20, 22, 24 and 26 in order to prevent the refrigerant from flowing backward.
  • the accumulators 30, 32 and 34 include a first accumulator 30 connected to a four-way valve 8 by a refrigerant pipe 18 and separating the refrigerant introduced into the refrigerant pipe 18 into a gas and a liquid; a second accumulator 32 connected to the first accumulator 30 by the refrigerant pipe 40 and connected to the first and second compressors 20 and 22, and a third accumulator 34 connected to the first accumulator 30 by a refrigerant pipe 42 and connected to the third and fourth compressors 24 and 26.
  • the second accumulator 32 is connected to the first compressor 20 by a first pipe 50 and to the second compressor 22 by a second pipe 52, so that it can separate the refrigerant supplied to the first accumulator 30 into a gas and a liquid and supply the gaseous refrigerator to the first and second compressors 20 and 22.
  • the third accumulator 34 is connected to the third compressor 24 by a third pipe 54 and to the fourth compressor 26 by a fourth pipe 56, so that it can separate the refrigerant supplied to the first accumulator 30 into a gas and a liquid and supply the gaseous refrigerant to the third and fourth compressors 24 and 26.
  • the first, second and third accumulators have the same structure and may differ in their sizes depending on capacities of the compressors.
  • the first accumulator 30 has the following structure.
  • the first accumulator 30 includes a case 60 connected to the four-way valve 8 by the refrigerant pipe 18 and having a hermetic space into which the refrigerant is sucked, first and second discharge tubes 62 and 64 inserted for as long as a prescribed length into the case 60 from the lower side of the case 60 and supplying a gaseous refrigerant gasificated inside the case 60 to the second and third accumulators 32 and 34, a screen 66 installed at an upper portion inside the case 60, and a tube holder 68 supporting the discharge tubes 62 and 64 installed inside the case 60.
  • Oil contained in the refrigerant sucked into the case 60 is stored at a lower portion inside the case 60, and oil retrieving holes 70 and 72 are formed at one portion of the first and second discharge tubes 62 and 64 sunk in the oil, so that oil stored at the lower portion of the case 60 is sucked through the oil retrieving holes 70 and 72 and retrieved to each compressor.
  • the oil stored in the case 60 has a suction force by virtue of a pressure of the refrigerant passing the first and second discharge tubes 62 and 64.
  • the air-conditioner constructed as described above in accordance with the present invention operates as follows.
  • the refrigerant is gasificated and separated into a liquid and a gas in the first accumulator 30, and oil contained in the refrigerant is stored at a lower portion of the first accumulator 30.
  • the gaseous refrigerant which has been gasificated in the first accumulator is supplied to the second accumulator 32 through the first discharge tube 62 and the refrigerant pipe 40, and also to the third accumulator 34 through the second discharge tube 64 and the refrigerant pipe 42.
  • the oil stored at the lower portion of the first accumulator 30 is sucked through the oil retrieving holes 70 and 72 formed at the first and second discharge tubes 62 and 64 and supplied together with the gaseous refrigerant to the second and third accumulators 32 and 34.
  • the refrigerant which has been supplied in the second accumulator 32 is separated into a gas and a liquid, and the gaseous refrigerant after being gasificated in the second accumulator is supplied to the first compressor 20 through the first pipe 50 and to the second compressor 22 through the second pipe 52.
  • the oil stored in the second accumulator 32 is retrieved together with the gaseous refrigerant into the first and second compressors 20 and 22 through the first and second pipes 50 and 52, to perform a lubricating operation of the compressors.
  • the refrigerant and the oil are supplied only the two compressors 20 and 22 from the second accumulator 32, so that the amount of oil supplied to the first and second compressors 20 and 22 can be maintained constantly.
  • the refrigerant supplied to the third accumulator 34 is separated into a gas and a liquid, and the gaseous refrigerant after being gasified in the third accumulator 34 is supplied together with the oil stored in the third accumulator 34 to the third compressor 24 through the third pipe 54 and also to the fourth compressor 26 through the fourth pipe 56.
  • the oil is supplied only to the two compressors 24 and 26 from the third accumulator 34, the amount of oil supplied to the third and fourth compressors 24 and 26 can be maintained constantly.
  • the air-conditioner having multiple compressors in accordance with the present invention has the following advantages.

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  • 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)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
EP05004194.6A 2005-02-25 2005-02-25 Conditionneur d'air avec plusieurs compresseurs Not-in-force EP1696189B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05004194.6A EP1696189B1 (fr) 2005-02-25 2005-02-25 Conditionneur d'air avec plusieurs compresseurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05004194.6A EP1696189B1 (fr) 2005-02-25 2005-02-25 Conditionneur d'air avec plusieurs compresseurs

Publications (2)

Publication Number Publication Date
EP1696189A1 true EP1696189A1 (fr) 2006-08-30
EP1696189B1 EP1696189B1 (fr) 2017-09-27

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ID=34933958

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05004194.6A Not-in-force EP1696189B1 (fr) 2005-02-25 2005-02-25 Conditionneur d'air avec plusieurs compresseurs

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1983278A3 (fr) * 2007-04-17 2010-01-13 Behr GmbH & Co. KG Collecteur de fluide
CN101392968B (zh) * 2007-09-20 2011-01-05 无锡同方人工环境有限公司 一种大容量多联式空调/热泵机组
DE102015107719A1 (de) * 2015-05-18 2016-11-24 Denso Automotive Deutschland Gmbh Kältemittel-Akkumulator für einen Kältemittelkreislauf und Kältemittelkreislauf mit einem solchen Kältemittel-Akkumulator

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08159580A (ja) * 1994-11-30 1996-06-21 Sanyo Electric Co Ltd 冷凍装置
JPH08200892A (ja) * 1995-01-20 1996-08-06 Mitsubishi Electric Corp 冷凍装置
JPH10232056A (ja) * 1997-02-20 1998-09-02 Hitachi Ltd 空気調和装置
JPH10267435A (ja) * 1997-03-25 1998-10-09 Mitsubishi Heavy Ind Ltd 冷凍サイクル
JP2000146324A (ja) * 1998-11-12 2000-05-26 Mitsubishi Electric Corp 冷凍機
JP2002277077A (ja) * 2001-03-19 2002-09-25 Fujitsu General Ltd 空気調和機
JP2003240367A (ja) * 2002-02-14 2003-08-27 Hitachi Ltd 冷凍空気調和装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08159580A (ja) * 1994-11-30 1996-06-21 Sanyo Electric Co Ltd 冷凍装置
JPH08200892A (ja) * 1995-01-20 1996-08-06 Mitsubishi Electric Corp 冷凍装置
JPH10232056A (ja) * 1997-02-20 1998-09-02 Hitachi Ltd 空気調和装置
JPH10267435A (ja) * 1997-03-25 1998-10-09 Mitsubishi Heavy Ind Ltd 冷凍サイクル
JP2000146324A (ja) * 1998-11-12 2000-05-26 Mitsubishi Electric Corp 冷凍機
JP2002277077A (ja) * 2001-03-19 2002-09-25 Fujitsu General Ltd 空気調和機
JP2003240367A (ja) * 2002-02-14 2003-08-27 Hitachi Ltd 冷凍空気調和装置

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 10 31 October 1996 (1996-10-31) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 12 26 December 1996 (1996-12-26) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 14 31 December 1998 (1998-12-31) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 01 29 January 1999 (1999-01-29) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 08 6 October 2000 (2000-10-06) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 01 14 January 2003 (2003-01-14) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1983278A3 (fr) * 2007-04-17 2010-01-13 Behr GmbH & Co. KG Collecteur de fluide
CN101392968B (zh) * 2007-09-20 2011-01-05 无锡同方人工环境有限公司 一种大容量多联式空调/热泵机组
DE102015107719A1 (de) * 2015-05-18 2016-11-24 Denso Automotive Deutschland Gmbh Kältemittel-Akkumulator für einen Kältemittelkreislauf und Kältemittelkreislauf mit einem solchen Kältemittel-Akkumulator

Also Published As

Publication number Publication date
EP1696189B1 (fr) 2017-09-27

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