EP1553365A2 - Klimaanlage - Google Patents

Klimaanlage Download PDF

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Publication number
EP1553365A2
EP1553365A2 EP04251797A EP04251797A EP1553365A2 EP 1553365 A2 EP1553365 A2 EP 1553365A2 EP 04251797 A EP04251797 A EP 04251797A EP 04251797 A EP04251797 A EP 04251797A EP 1553365 A2 EP1553365 A2 EP 1553365A2
Authority
EP
European Patent Office
Prior art keywords
refrigerant
compressor
vapour
heat exchanger
liquid
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Withdrawn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
EP04251797A
Other languages
English (en)
French (fr)
Other versions
EP1553365A3 (de
Inventor
Gyoo Ha Jung
Jong Kweon Ha
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP1553365A2 publication Critical patent/EP1553365A2/de
Publication of EP1553365A3 publication Critical patent/EP1553365A3/de
Withdrawn legal-status Critical Current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
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
    • 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
    • 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—Component parts or details not otherwise provided for in this subclass
    • 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
    • F25B2500/02—Increasing the heating capacity of a reversible cycle during cold outdoor conditions

Definitions

  • the present invention relates to an air conditioning system operable to heat air, comprising a compressor, an outdoor heat-exchanger, an indoor heat exchanger, an expansion device and a vapour-liquid separator
  • Air conditioning systems which can operate in either a heating or a cooling mode generally comprise a compressor, an outdoor heat exchanger, a refrigerant expansion means, an indoor heat exchanger, and a four-way valve.
  • a refrigerant is discharged from the compressor and supplied to the outdoor heat exchanger, and the four-way valve is set so that the refrigerant passes through the indoor heat exchanger and is introduced into an inlet of the compressor.
  • the refrigerant is in a high-temperature and high-pressure state from being compressed by the compressor and is introduced into the outdoor heat exchanger to be condensed into a liquid state. It then passes through the refrigerant expansion means where it is expanded to a low-pressure state.
  • the low pressure refrigerant then flows onwards to the indoor heat exchanger where it is evaporated to a gaseous state and it then passes to the inlet of the compressor.
  • the refrigerant at the outdoor heat exchanger emits heat by heat-exchanging with outdoor air
  • the refrigerant at the indoor heat exchanger absorbs heat by heat-exchanging with indoor air, thereby cooling an indoor room.
  • the refrigerant is discharged from the compressor and supplied to the indoor heat exchanger, and the four-way valve is set so as to divert the refrigerant through the outdoor heat exchanger and into the inlet of the compressor. Accordingly, the refrigerant in a high-temperature and high-pressure state compressed by the compressor is introduced into the indoor heat exchanger where it is condensed into a liquid state. The condensed refrigerant then passes through the refrigerant expansion means where it is expanded to a low-pressure state. The low pressure refrigerant then passes to the outdoor heat exchanger where it is evaporated to a gaseous state and it then flows toward the inlet of the compressor. In this heating process, the refrigerant at the indoor heat exchanger emits heat by heat-exchanging with the indoor air, and the refrigerant at the outdoor heat exchanger absorbs heat by heat-exchanging with the outdoor air, thereby heating the indoor room.
  • the outdoor temperature is extremely low (for example, lower than -10°C)
  • the pressures at high and low sides in the air conditioning system are decreased, thus preventing the air conditioning system from working at maximum capacity.
  • the pressure at the low-pressure side of the outdoor heat exchanger must be lowered so that the temperature of the refrigerant is lower than the outdoor temperature for heat-exchanging to occur from the outdoor air to the refrigerant.
  • the refrigerant introduced into the inlet of the compressor has a low density, it is difficult to increase a discharge pressure of the compressor to a high pressure.
  • the low discharge pressure of the compressor makes it difficult to raise the temperature of the refrigerant at the indoor heat exchanger, thus decreasing the heating effects of the air conditioning system.
  • an object of the invention is to provide an air conditioning system for heating and cooling air, which has an improved heating capacity and improved compressor reliability.
  • an air conditioning system operable to heat air, comprising a compressor, an outdoor heat-exchanger, an indoor heat exchanger, an expansion device and a vapour-liquid separator, characterised by a first refrigerant supply pipe connecting the vapour-liquid separator to the compressor to supply refrigerant to the compressor from the vapour-liquid separator.
  • the air conditioning system preferably includes a first control valve is located in the first refrigerant supply pipe to control the amount of refrigerant supplied to the compressor through said first refrigerant supply pipe.
  • the first refrigerant supply pipe is connected to a liquid outlet of the vapour-liquid separator to supply refrigerant in a liquid state to the inlet of the compressor.
  • the first refrigerant supply pipe may be connected to a vapour outlet of the vapour-liquid separator to supply refrigerant in a gaseous state to the compressor.
  • a second refrigerant supply pipe preferably connects the vapour outlet of the vapour-liquid separator to the compressor to supply refrigerant in the gaseous state to the compressor from the vapour-liquid separator.
  • the second refrigerant supply pipe may connect the liquid outlet of the vapour-liquid separator to the compressor to supply refrigerant in the liquid state to the inlet of the compressor from the vapour-liquid separator.
  • a second control valve is located in the second refrigerant supply pipe to control the amount of refrigerant supplied to the compressor.
  • an air conditioning system for heating and cooling air comprises a scroll compressor 10 for compressing a refrigerant in a liquid state to a high-temperature and high-pressure state, an outdoor heat exchanger 11 for heat-exchanging the circulating refrigerant with outdoor air, an indoor heat exchanger 12 for heat-exchanging the circulating refrigerant with indoor air, and a four-way valve 13 for directing the flow of the refrigerant so that it flows selectively into either the outdoor heat exchanger 11 or the indoor heat exchanger 12.
  • the four-way valve 13 includes four connection ports respectively connected to an outlet of the compressor 10 by a refrigerant pipe 14, to the outdoor heat exchanger 11 by a refrigerant pipe 15, to the indoor heat exchanger 12 by a refrigerant pipe 16, and to an inlet of the compressor 10 by a refrigerant pipe 17.
  • a first refrigerant expansion device 19 for expanding the refrigerant by decompression is installed in the middle of a refrigerant pipe 18 for connecting the indoor heat exchanger 12 and the outdoor heat exchanger 11.
  • a vapour-liquid separator 20 is installed between the first refrigerant expansion device 19 and the indoor heat exchanger 12, and a second refrigerant expansion device 21 is installed between the vapour-liquid separator 20 and the indoor heat exchanger 12.
  • An accumulator 22 for minimizing the flow of the refrigerant in the liquid state into the compressor 10 is installed in the refrigerant pipe 17 that is connected to the inlet of the compressor 10.
  • the air conditioning system further comprises a gaseous refrigerant supply pipe 23 connecting the vapour-liquid separator 20 and the compressor 10, and a gaseous refrigerant supply valve 24, installed in the gaseous refrigerant supply pipe 23, for controlling the supply of the refrigerant in the gaseous state through the gaseous refrigerant supply pipe 23.
  • the system is thereby operable to supply refrigerant in a gaseous state, separated by the vapour-liquid separator 20, to the compressor 10 in a heating mode when the outdoor temperature is extremely low, so the refrigerant in a comparatively high-density and high-pressure gaseous state is supplied to the compressor 10, thus allowing a compression ratio of the compressor 10 to be reduced and increasing the reliability of the compressor 10.
  • the amount of refrigerant circulating toward the indoor heat exchanger 12 in a comparatively high-pressure state is increased, thus improving heating effects of the air conditioning system, and the amount of refrigerant in a liquid state circulating toward the outdoor heat exchanger 11 is decreased, thus improving heat exchanging capacity of the outdoor heat exchanger 11.
  • the air conditioning system of the present invention is also operable to supply the refrigerant in a liquid state, separated by the vapour-liquid separator 20, to the inlet of the compressor 10 in the heating mode when the outdoor temperature is even lower than that in the above-described case.
  • the air conditioning system further comprises a liquid refrigerant supply pipe 25 for connecting the vapour-liquid separator 20 and the compressor 10, and a liquid refrigerant supply valve 26, installed in the liquid refrigerant supply pipe 25, for controlling the supply of the refrigerant in the liquid state through the liquid refrigerant supply valve pipe 25.
  • the degree to which the liquid refrigerant supply valve 26 is opened is controlled such that the refrigerant in the liquid state supplied to the inlet of the compressor 10 is sprayed in a decompressed state.
  • an amount of the refrigerant circulating toward the indoor heat exchanger 12 in the heating mode is increased, thus increasing the reliability of the compressor 10 and improving heating effects of the air conditioning system.
  • the refrigerant in the liquid state supplied to the inlet of the compressor 10 is evaporated in the compressor 10, thus preventing an extreme increase in temperature in the compressor 10.
  • the refrigerant discharged from the compressor 10 is supplied to the outdoor heat exchanger 11, and the four-way valve 13 directs the flow of the refrigerant that has passed through the indoor heat exchanger 12, into the inlet of the compressor 10.
  • the first refrigerant expansion device 19 is completely opened, and the gaseous refrigerant supply valve 24 and the liquid refrigerant supply valve 26 are closed. Accordingly, the refrigerant in a high-temperature and high-pressure state compressed by the compressor 10 is introduced into the outdoor heat exchanger 11 to be condensed into a liquid state, from where the condensed refrigerant passes through the first refrigerant expansion device 19 without decompression and is then introduced into the vapour-liquid separator 20.
  • the refrigerant in the liquid state passed through the vapour-liquid separator 20 then passes through the second refrigerant expansion device 21 so that it is expanded into a low-temperature state, and is then introduced into the indoor heat exchanger 12 so that it is evaporated into a gaseous state.
  • the refrigerant in the gaseous state then flows back toward the inlet of the compressor 10.
  • the refrigerant in the high-temperature state at the outdoor heat exchanger 11 is condensed by heat-exchanging with the outdoor air, and emits heat.
  • the refrigerant in the low-temperature state in the indoor heat exchanger 12 is evaporated by heat-exchanging with the indoor air, and absorbs heat. Thereby, the cooling mode of the air conditioning system of the present invention is achieved.
  • the refrigerant discharged from the compressor 10 is supplied to the indoor heat exchanger 12, and the four-way valve 13 is operated to divert the flow of the refrigerant that has passed through the outdoor heat exchanger 11, into the inlet of the compressor 10.
  • the gaseous refrigerant supply valve 24 and the liquid refrigerant supply valve 26 are normally closed in the heating mode, the gaseous refrigerant supply valve 24 is opened to a specific degree if the outdoor temperature is extremely low (for example, lower than -10°C).
  • the refrigerant in the high-temperature and high-pressure state compressed by the compressor 10 is introduced into the indoor heat exchanger 12 so that the refrigerant is condensed into a liquid state, and the condensed refrigerant passes through the second refrigerant expansion device 21 where it is decompressed into a middle-pressure state, and is then introduced into the vapour-liquid separator 20.
  • the refrigerant in a liquid state, separated by the vapour-liquid separator 20 passes through the first refrigerant expansion device 19 so that the refrigerant is decompressed and expanded, and is introduced into the outdoor heat exchanger 11 to be evaporated into a gaseous state. Then, the refrigerant in the gaseous state flows back toward the inlet of the compressor 10.
  • the refrigerant in the high-temperature state at the indoor heat exchanger 12 is condensed by heat-exchanging with the indoor air, and emits heat to the indoor room.
  • the refrigerant in the low-temperature state at the outdoor heat exchanger 11 is evaporated by heat-exchanging with the outdoor air, and absorbs heat.
  • the refrigerant in the middle-pressure state is supplied from the vapour-liquid separator 20 to the compressor 10, and this refrigerant, together with the refrigerant supplied to the inlet of the compressor 10 from the outdoor heat exchanger 11, is compressed by the compressor 10 and circulated toward the indoor heat exchanger 12. Therefore, the amount of refrigerant in the high-pressure state circulating in the indoor heat exchanger 12 is more than the amount of the refrigerant in the low-pressure state circulating in the outdoor heat exchanger 11. Accordingly, the air conditioning system of the present invention reduces a difference (a compression ratio) between a suction pressure and a discharge pressure of the compressor 10, thus increasing the reliability of the compressor 10.
  • the amount of the refrigerant circulating toward the indoor heat exchanger 12 is increased, thus allowing the high pressure in the indoor heat exchanger 12 to be maintained and increasing the heating effect of the air conditioning system. Also, only the refrigerant in the liquid state, separated by the vapour-liquid separator 20, passes through the first refrigerant expansion device 19 and is expanded by decompression, so the refrigerant is more easily expanded and thereby increases the heat exchanging efficiency of the outdoor heat exchanger 11. Although the capacity of the outdoor heat exchanger 11 is the same for both the heating mode and the cooling mode, the amount of the refrigerant circulating in the outdoor heat exchanger 11 in the heating mode is less than the amount of refrigerant circulating in the outdoor heat exchanger 11 in the cooling mode.
  • the air conditioning system of the present invention has the effect of expanding the capacity of the outdoor heat exchanger 11, the heat exchanging efficiency of the outdoor heat exchanger 11 of the air conditioning system is remarkably improved compared to that of conventional air conditioning systems, thus increasing operating efficiency in the heating mode.
  • the liquid refrigerant supply valve 26 is opened to a small degree together with the above-described opening of the gaseous refrigerant supply valve 24 such that some of the refrigerant in the liquid state flowing from the vapour-liquid separator 20 to the first refrigerant expansion device 19, is instead diverted to be supplied to the inlet of the compressor 10. Therefore, the amount of the refrigerant circulating toward the indoor heat exchanger 12 is increased and the amount of the refrigerant circulating toward the outdoor heat exchanger 11 is correspondingly decreased, thus improving the heating effect of the air conditioning system.
  • the refrigerant in the liquid state supplied to the inlet of the compressor 10 is evaporated in the compressor 10, thus preventing the excessive rise of the temperature of the compressor 10. Since the excessive rise of the temperature at the outlet of the compressor 10 is prevented, even when the compressor 10 is running at maximum capacity in the heating mode when the outdoor temperature is extremely low, the air conditioning system of the present invention has greater reliability and stability over that of known air conditioning systems. Also, since the compressor 10 is a scroll compressor, which is capable of compressing a refrigerant in a liquid state, the inflow of a small amount of the refrigerant in the liquid state into the compressor 10 does not cause trouble in the operation of the compressor 10.
  • the present invention provides an air conditioning system for heating and cooling air, in which refrigerant in a gaseous state, separated by a vapour-liquid separator, is supplied to a compressor in a heating mode so as to decrease a compression ratio of the compressor and increase a discharge pressure of the compressor, thus improving heating effects and increasing the reliability of the compressor.
  • the air conditioning system of the present invention Since the excessive rise of the temperature of the compressor is prevented by the evaporation of the refrigerant in a liquid state supplied to an inlet of the compressor in the heating mode, the air conditioning system of the present invention has improved reliability and stability. In this case, the amount of the refrigerant circulating toward the indoor heat exchanger is further increased and the amount of the refrigerant circulating toward the outdoor heat exchanger is further decreased, thus improving the heating effects of the air conditioning system of the present invention.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
EP04251797A 2004-01-06 2004-03-26 Klimaanlage Withdrawn EP1553365A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040000685A KR20050072299A (ko) 2004-01-06 2004-01-06 냉난방 공기조화시스템
KR2004000685 2004-01-06

Publications (2)

Publication Number Publication Date
EP1553365A2 true EP1553365A2 (de) 2005-07-13
EP1553365A3 EP1553365A3 (de) 2012-06-20

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ID=34588120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04251797A Withdrawn EP1553365A3 (de) 2004-01-06 2004-03-26 Klimaanlage

Country Status (3)

Country Link
EP (1) EP1553365A3 (de)
KR (1) KR20050072299A (de)
CN (1) CN1637351A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013245855A (ja) * 2012-05-24 2013-12-09 Hitachi Appliances Inc 空気調和機
CN103983038A (zh) * 2014-05-06 2014-08-13 广东美的暖通设备有限公司 空调系统及其控制方法
EP2977691A4 (de) * 2013-09-30 2016-06-08 Guangdong Meizhi Compressor Co Ltd Kälteanlage und heizsystem
CN115164310A (zh) * 2022-08-24 2022-10-11 中国飞机强度研究所 飞机发动机测试试验用全新风空气补偿系统及补偿方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100921211B1 (ko) * 2005-08-22 2009-10-13 에머슨 클리메이트 테크놀로지즈 인코퍼레이티드 증기 분사 시스템을 갖춘 압축기
CN100360875C (zh) * 2005-09-26 2008-01-09 浙江春晖智能控制股份有限公司 热泵型中央及户式中央空气调节设备的制冷系统
CN100366992C (zh) * 2005-11-25 2008-02-06 珠海格力电器股份有限公司 低温空调热泵系统及使用该系统降低温度调节波动的方法
CN100439809C (zh) * 2005-12-16 2008-12-03 珠海格力电器股份有限公司 一种压缩机补气系统及补气控制方法
CN102022853A (zh) * 2010-11-18 2011-04-20 海尔集团公司 空调器系统
CN103375953B (zh) * 2012-04-27 2016-02-10 珠海格力电器股份有限公司 气液分离器及具有其的空调系统
CN104214993A (zh) * 2014-09-30 2014-12-17 广东志高暖通设备股份有限公司 一种多联机空调系统及其油平衡装置和控制方法
CN105588365B (zh) * 2015-06-30 2018-11-30 青岛海信日立空调系统有限公司 一种强热型室外机、热泵系统及其控制方法
CN105588361A (zh) * 2015-11-04 2016-05-18 青岛海信日立空调系统有限公司 一种多联机空调系统
CN106642852A (zh) * 2016-12-30 2017-05-10 中原工学院 一种制冷装置三级复合式快速融霜系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO890076D0 (no) * 1989-01-09 1989-01-09 Sinvent As Luftkondisjonering.
JPH0712411A (ja) * 1993-06-24 1995-01-17 Hitachi Ltd 冷凍サイクルおよび冷凍サイクルの冷媒組成比制御方法
JP3080558B2 (ja) * 1995-02-03 2000-08-28 株式会社日立製作所 寒冷地向けヒートポンプ空調機
JP2001263859A (ja) * 2000-03-17 2001-09-26 Hitachi Ltd 空気調和機

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013245855A (ja) * 2012-05-24 2013-12-09 Hitachi Appliances Inc 空気調和機
EP2977691A4 (de) * 2013-09-30 2016-06-08 Guangdong Meizhi Compressor Co Ltd Kälteanlage und heizsystem
CN103983038A (zh) * 2014-05-06 2014-08-13 广东美的暖通设备有限公司 空调系统及其控制方法
CN115164310A (zh) * 2022-08-24 2022-10-11 中国飞机强度研究所 飞机发动机测试试验用全新风空气补偿系统及补偿方法

Also Published As

Publication number Publication date
EP1553365A3 (de) 2012-06-20
KR20050072299A (ko) 2005-07-11
CN1637351A (zh) 2005-07-13

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