EP1674807A2 - Climatiseur - Google Patents

Climatiseur Download PDF

Info

Publication number
EP1674807A2
EP1674807A2 EP05104573A EP05104573A EP1674807A2 EP 1674807 A2 EP1674807 A2 EP 1674807A2 EP 05104573 A EP05104573 A EP 05104573A EP 05104573 A EP05104573 A EP 05104573A EP 1674807 A2 EP1674807 A2 EP 1674807A2
Authority
EP
European Patent Office
Prior art keywords
refrigerant
compressor
air conditioner
accumulator
electric expansion
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Withdrawn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
EP05104573A
Other languages
German (de)
English (en)
Other versions
EP1674807A3 (fr
Inventor
Sung-Goo Kim
Jong-Moon Kim
Jong-Jin Shin
Hee-Sool Lee
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 EP1674807A2 publication Critical patent/EP1674807A2/fr
Publication of EP1674807A3 publication Critical patent/EP1674807A3/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/006—Compression machines, plants or systems with reversible cycle not otherwise provided for two pipes connecting the outdoor side to the indoor side with multiple indoor units
    • 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
    • F25B2400/16—Receivers
    • 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
    • F25B2500/27—Problems to be solved characterised by the stop of the refrigeration 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
    • F25B2500/00—Problems to be solved
    • F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
    • 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
    • F25B2600/15—Control issues during shut down
    • 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

  • the present invention relates to an air conditioner comprising a compressor, a plurality of heat exchangers, an accumulator and, at least one expansion valve connected in a refrigeration circuit operable to perform a cooling and/or heating cycle and, a control unit for controlling operation of the air conditioner.
  • An air conditioner generally controls the temperature of air within a building such as a house, an office or a factory by heating, cooling air and comprises a heat exchanger, a compressor, a condenser and an evaporator connected with the compressor.
  • a conventional air conditioner is described in Korean Patent Publication No. 2004-0074544.
  • Such a conventional air conditioner comprises an accumulator to separate liquid and gaseous refrigerant supplied from an evaporator at low temperature and low pressure and allow the gaseous refrigerant to pass therethrough, a plurality of compressors to compress the low temperature and pressure gaseous refrigerant from the accumulator, a plurality of check valves provided at each compressor outlet to prevent a backflow of the refrigerant, a condenser to condense the gaseous refrigerant discharged from the compressor at high temperature and high pressure to a liquid state at middle temperature and high pressure by heat exchange with external air, an electric expansion valve to expand the liquid refrigerant at middle temperature and high pressure discharged from the condenser to a liquid refrigerant at low temperature and pressure, an evaporator to evaporate the liquid refrigerant at low temperature and pressure from the electric expansion valve into gaseous refrigerant at low temperature and low pressure through heat exchange with surrounding air
  • the conventional air conditioner further comprises a fan motor ventilating external air to the condenser.
  • the fan motor reduces the number of revolutions from 20% to 30% in companion with a case in which the plurality of the compressors operate.
  • the conventional air conditioner may increase the general efficiency of the air conditioning system by changing the fan motor velocity of the condenser according to the number of the compressors in operation.
  • the conventional accumulator should be of sufficient size to accommodate the refrigerant contained within the heat exchangers in a case when the air conditioning system device stops operating. If the accumulator is not of sufficient size to accommodate the refrigerant, problems may occur when the compressor is restarted as the liquid refrigerant may be supplied in the direction of the compressor through the accumulator.
  • the present invention seeks to provide a system which overcomes or substantially alleviates the problems discussed above.
  • An air conditioner according to the present invention is characterised in that when the compressor stops, the control unit is configured so as to close at least one expansion valve to prevent refrigerant from flowing into the accumulator.
  • an expansion valve is located in the refrigeration circuit between each heat exchanger and the accumulator.
  • the air conditioner comprises a single expansion valve in the refrigeration circuit between each pair of heat exchangers.
  • a refrigerant flow check valve is located in the refrigeration circuit to prevent back flow of refrigerant into the compressor when the compressor is stopped.
  • a pressure control valve is disposed between expansion valves, the control unit being configured to open the pressure control valve when the pressure of refrigerant in the refrigeration circuit between said expansion valves exceeds a predetermined pressure.
  • FIG. 1 a first embodiment of an air conditioner comprising an air conditioning system 1 provided to control air temperature and a control unit 40 to control the air conditioning system 1.
  • the air conditioning system 1 comprises a compressor 11, heat exchangers 15,31 which exchange heat between a refrigerant supplied from the compressor 11 and surrounding air, electric expansion valves 17,33 provided between the heat exchangers 15,31 and an accumulator 19 provided between the heat exchangers 15,31 and the compressor 11.
  • a refrigerant tube 7 forms a closed circuit such that the refrigerant circulates through the compressor 11, the heat exchangers 11,31 and the accumulator 19.
  • the air conditioning system 1 further comprises a pressure control unit 21 provided to control the pressure of the refrigerant in the portion of refrigerant tube located between the electric expansion valves 17,33.
  • a four-way valve 13 is provided to change the refrigerant flow direction through the heat exchangers 15,31 such that each heat exchanger 15,31 may operate alternately in either an air cooling or an air heating mode.
  • This embodiment of the air conditioning system 1 comprises one indoor unit 30 provided in a building such as a house or an office and a factory to cool or heat the interior air and an outdoor unit 10 connected to the indoor unit 30.
  • the air conditioning system 1 may be provided as a single body equipped in one casing.
  • the air conditioning system further comprises a receiver 27 provided between the plurality of electric expansion valves 17,33 to accommodate refrigerant and emit liquid refrigerant.
  • the heat exchangers 15,31 comprise a first heat exchanger 15 provided in the outdoor unit 10, and a second heat exchanger 31 provided in the indoor unit 30.
  • Each heat exchanger 15,31 is provided with a ventilation fan 35 adjacent thereto to accelerate the heat exchange across the heat exchanger by forced convection.
  • the first heat exchanger 15 When the air conditioning system 1 performs a cooling operation, the first heat exchanger 15 operates as a condenser to condense the refrigerant compressed from the compressor 11 and the second heat exchanger 31 operates as an evaporator to evaporate the refrigerant by absorbing heat from the surrounding air.
  • the first heat exchanger 15 When the air conditioning system 1 performs a heating operation, the first heat exchanger 15 operates as an evaporator to evaporate the refrigerant and the first heat exchanger 15 operates as a condenser to condense the refrigerant compressed from the compressor.
  • the second heat exchanger 31 may be provided as a plurality of heat exchangers according to the quantity of indoor units 30.
  • the electric expansion valves 17,33 comprise a first electric expansion valve 17 provided in the outdoor unit 10 and a second electric expansion valve 33 provided in the indoor unit 30.
  • the electric expansion valves 17,33 are provided in the refrigerant pipe 7 located between the first heat exchanger 15 and the second heat exchanger 31, the first electric expansion valve 17 being located proximate to the first heat exchanger 15 and the second electric expansion valve 33 being located proximate to the second heat exchanger 31.
  • the first electric expansion valve 17 opens completely such that the refrigerant passing therethrough does not expand and the second electric expansion valve 33 is controlled such that high temperature and high pressure refrigerant passing therethrough expands to a low temperature and low pressure refrigerant.
  • the first electric expansion valve 33 is controlled such that high temperature and high pressure refrigerant passing therethrough expands to low temperature and low pressure refrigerant and the second electric expansion valve 33 opens completely such that the refrigerant passing therethrough does not expand.
  • the accumulator 19 accommodates the refrigerant transmitted from the heat exchangers 15,31 and the compressor 11. It may also be provided to prevent the supply of liquid refrigerant to the compressor 11.
  • the accumulator 19 is located lower than the first and the second heat exchangers 15,31. In this case, the refrigerant in the refrigerant pipe 7 flows into the accumulator 19 due to gravity when the air conditioning system 1 stops operating. When this occurs, the first electronic expansion valve 17 and the second electronic expansion valve 33 are closed by the control unit 40 such that the refrigerant located between the first electronic expansion valve 17 and the second electronic expansion valve 33 does not flow to the accumulator 19 and so the size of the accumulator 19 may be reduced.
  • the four-way valve 13 controls the flow direction of the refrigerant in the air conditioning system to alternately select the cooling or heating operation.
  • the air conditioning system 1 performs a cooling operation
  • the refrigerant compressed by the compressor 11 is supplied to the first heat exchanger 15 by the four-way valve 15 and the refrigerant from the second heat exchanger 31 is supplied to the accumulator 19.
  • the air conditioning system 1 performs a heating operation
  • the refrigerant compressed by the compressor 11 is supplied by the four-way valve to the second heat exchanger 31 and the refrigerant from the first heat exchanger 15 is supplied to the accumulator 19.
  • the pressure control unit 21 is provided as a means to prevent the pressure of the refrigerant located between the electric expansion valves 17,33 from exceeding a predetermined pressure when the electric expansion valves 17,33 are closed by the control unit 40.
  • This predetermined pressure is preferably but not necessarily lower than an endurable pressure of the refrigerant pipe 7 located between the electric expansion valves 17,33.
  • the pressure control unit 21 comprises an auxiliary pipe 23 connected with respect to the refrigerant pipe 7 between the electric expansion valves 17,33 and the accumulator 19, and a relief valve 25 provided to the auxiliary pipe 23.
  • the pressure control unit 21 is not limited to the auxiliary pipe 23 and the relief valve 25.
  • the auxiliary pipe 23 connects the refrigerant pipe 7 provided between the first and the second electric expansion valves 17,33 and the refrigerant pipe 7 provided between the four-way valve 13 and the accumulator 19.
  • the auxiliary pipe 23 may be located to connect the refrigerant pipe 7 provided between the first and the second electric expansion valves 17,33 and the refrigerant pipe 7 provided between the second electric expansion valve 33 and the second heat exchanger 31.
  • the relief valve 25 opens when the pressure of the refrigerant in the section of refrigerant pipe 7 between the first and the second electric expansion valves 17,33 increases more than the predetermined pressure. If this occurs, the refrigerant may pass to the accumulator 19.
  • the receiver 27 is located between the first and the second electric expansion valves 17,33 and allows the liquid refrigerant to flow through the first or the second electric expansion valve 17,33 such that the air conditioning system 1 operates in a stable manner.
  • the compressor 11, the first heat exchanger 15, the accumulator 19 and the first electric expansion valve 17 are located in the outdoor unit. As shown in Figure 1, the four-way valve 13, the pressure control unit 21 and the receiver 27 may also be located in the outdoor unit as well as the ventilation fan 35 adjacent to the first heat exchanger 15.
  • the second heat exchanger 31 and the second electric expansion valve 33 are located in the indoor unit as well as the ventilation fan 35 adjacent to the second heat exchanger 31.
  • the control unit 40 controls the first and second electric expansion valves 17,33 as previously described to prevent the refrigerant located between the first and second electric expansion valves 17,33 from flowing to the accumulator 19 when the air conditioning system 1 stops operating.
  • the control unit 40 opens the first and second electric expansion valves 17,33 such that the first electric expansion valve 17 or the second electric expansion valve 33 may perform an expansion function when the air conditioning system 1 is operating.
  • the air conditioner according to the first embodiment of the invention closes the electric expansion valves 17,33 to prevent the refrigerant accommodated between the electric expansion valves from flowing to the accumulator when the operation of the compressor stops.
  • the size of the accumulator may be reduced as the refrigerant located between the first and the second electric expansion valves does not need to be accommodated in the accumulator.
  • FIG. 4 is a schematic view of an air conditioner according to a second embodiment of the present invention.
  • an air conditioning system 101 differs from the first embodiment in that the air conditioning system 101 further comprises a check valve 50 provided at the outlet of the compressor 11 to prevent the refrigerant flowing backwards to the compressor 11.
  • check valve 50 is provided between the compressor 11 and the four-way valve 13 and prevents the backward flow of refrigerant from the first heat exchanger 15 or the second heat exchanger 31 to the compressor 11.
  • the control unit 40 closes one of either the first or second electric expansion valves 17,33 when the operation of the compressor 11 is stopped.
  • the control unit 40 closes the second electric expansion valve 33 when the operation of the compressor 11 is stopped during the cooling operation and closes the first electric expansion valve 17 when the operation of the compressor 11 is stopped during the heating operation.
  • the air conditioner according to the second embodiment of the present invention may close the electric expansion valves when the compressor stops operating and prevent the refrigerant interposed between one of the electric expansion valves and the check valve as well as that interposed between the electric expansion valves from flowing to the accumulator thereby reducing the size of the accumulator.
  • FIG. 5 is a schematic view of an air conditioner according to a third embodiment of the present invention.
  • the air conditioner according to the third embodiment comprises an air conditioning system 201 provided to control air temperature and a control unit (not shown) controlling the air conditioning system 201.
  • the air conditioning system 201 comprises the compressor 11, heat exchangers 15,31 to heat-exchange refrigerant supplied from the compressor 11, an electric expansion valve 217 provided between the heat exchangers 15,31, an accumulator 19 provided between the heat exchangers 15,31 and the compressor 11, and the check valve 50 provided at a refrigerant outlet of the compressor 11 to prevent the refrigerant from flowing backwards to the compressor.
  • the air conditioning unit 201 may further comprise the four-way valve 13 provided to change the refrigerant flow direction through the heat exchangers 15,31.
  • the electric expansion valve 217 is provided as a single unit different from the foregoing first and second embodiments. The detailed explanation about the function of the electric expansion valve 217 will be avoided because it is similar to the first embodiment.
  • the first heat exchanger 15 functions as the condenser to condense the refrigerant from the compressor 11 and the second heat exchanger 31 functions as the evaporator to evaporate and to absorb heat from surrounding air.
  • the first heat exchanger 15 functions as the evaporator to evaporate and to absorb heat from surrounding air and the second heat exchanger 31 functions as the condenser to condense the refrigerant compressed from the compressor 11.
  • the control unit (not shown) controls the electric expansion valve 217 such that the refrigerant located between the electric expansion valve 217 and the check valve 50 does not flow to the accumulator 19 when it is closed.
  • the air conditioner according to the third embodiment of the present invention may prevent the refrigerant located between the electric expansion valve 217 and the check valve 50 from flowing to the accumulator 19 if the control unit closes the electric expansion valve when the operation of the compressor stops. Accordingly, the size of the accumulator 19 may be reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
EP05104573A 2004-12-22 2005-05-27 Climatiseur Withdrawn EP1674807A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020040110336A KR100671301B1 (ko) 2004-12-22 2004-12-22 공기조화기

Publications (2)

Publication Number Publication Date
EP1674807A2 true EP1674807A2 (fr) 2006-06-28
EP1674807A3 EP1674807A3 (fr) 2007-07-04

Family

ID=36177368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05104573A Withdrawn EP1674807A3 (fr) 2004-12-22 2005-05-27 Climatiseur

Country Status (3)

Country Link
EP (1) EP1674807A3 (fr)
KR (1) KR100671301B1 (fr)
CN (1) CN1793758A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2320151A1 (fr) * 2008-07-29 2011-05-11 Daikin Industries, Ltd. Dispositif de climatisation
DE102015114309A1 (de) * 2015-08-28 2017-03-02 Halla Visteon Climate Control Corporation Bidirektionales elektronisches Expansionsorgan
WO2018177476A1 (fr) * 2017-04-01 2018-10-04 Viessmann Werke Gmbh & Co Kg Pompe à chaleur
US20220252313A1 (en) * 2019-08-07 2022-08-11 Mitsubishi Electric Corporation Chilling unit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100062115A (ko) * 2008-12-01 2010-06-10 삼성전자주식회사 공기조화기 및 그 제어방법
KR102146371B1 (ko) * 2013-09-25 2020-08-20 삼성전자주식회사 공기조화기

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4230470A (en) * 1977-01-21 1980-10-28 Hitachi, Ltd. Air conditioning system
US4735054A (en) * 1987-08-13 1988-04-05 Honeywell Inc. Method for minimizing off cycle losses of a refrigeration system during a cooling mode of operation and an apparatus using the method
GB2265229A (en) * 1992-03-16 1993-09-22 Toshiba Kk Air-conditioning apparatus having heat source unit and plural indoor units
EP1143209A1 (fr) * 1998-12-16 2001-10-10 Daikin Industries, Ltd. Refrigerateur
EP1207359A2 (fr) * 2000-11-15 2002-05-22 Carrier Corporation Régulation de la haute pression d'un cycle de compression à vapeur surcritique
US20040007003A1 (en) * 2002-07-15 2004-01-15 Healy John Joseph Refrigeration control
US20040103677A1 (en) * 2002-12-02 2004-06-03 Tgk Co., Ltd. Refrigeration system and method of operation therefor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH102623A (ja) 1996-06-11 1998-01-06 Mitsubishi Heavy Ind Ltd 冷凍装置
JPH1114177A (ja) 1997-06-26 1999-01-22 Mitsubishi Heavy Ind Ltd 空気調和装置
KR20010048760A (ko) * 1999-11-29 2001-06-15 윤종용 공조기기의 운전제어방법
KR100564444B1 (ko) * 2003-10-20 2006-03-29 엘지전자 주식회사 에어컨의 액 냉매 누적 방지 장치 및 방법

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4230470A (en) * 1977-01-21 1980-10-28 Hitachi, Ltd. Air conditioning system
US4735054A (en) * 1987-08-13 1988-04-05 Honeywell Inc. Method for minimizing off cycle losses of a refrigeration system during a cooling mode of operation and an apparatus using the method
GB2265229A (en) * 1992-03-16 1993-09-22 Toshiba Kk Air-conditioning apparatus having heat source unit and plural indoor units
EP1143209A1 (fr) * 1998-12-16 2001-10-10 Daikin Industries, Ltd. Refrigerateur
EP1207359A2 (fr) * 2000-11-15 2002-05-22 Carrier Corporation Régulation de la haute pression d'un cycle de compression à vapeur surcritique
US20040007003A1 (en) * 2002-07-15 2004-01-15 Healy John Joseph Refrigeration control
US20040103677A1 (en) * 2002-12-02 2004-06-03 Tgk Co., Ltd. Refrigeration system and method of operation therefor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2320151A1 (fr) * 2008-07-29 2011-05-11 Daikin Industries, Ltd. Dispositif de climatisation
EP2320151A4 (fr) * 2008-07-29 2011-09-07 Daikin Ind Ltd Dispositif de climatisation
DE102015114309A1 (de) * 2015-08-28 2017-03-02 Halla Visteon Climate Control Corporation Bidirektionales elektronisches Expansionsorgan
DE102015114309B4 (de) * 2015-08-28 2020-01-30 Hanon Systems Bidirektionales elektronisches Expansionsorgan
WO2018177476A1 (fr) * 2017-04-01 2018-10-04 Viessmann Werke Gmbh & Co Kg Pompe à chaleur
US20220252313A1 (en) * 2019-08-07 2022-08-11 Mitsubishi Electric Corporation Chilling unit
EP4012289A4 (fr) * 2019-08-07 2022-09-28 Mitsubishi Electric Corporation Unité de refroidissement
US12038210B2 (en) * 2019-08-07 2024-07-16 Mitsubishi Electric Corporation Chilling unit

Also Published As

Publication number Publication date
KR20060071659A (ko) 2006-06-27
CN1793758A (zh) 2006-06-28
KR100671301B1 (ko) 2007-01-19
EP1674807A3 (fr) 2007-07-04

Similar Documents

Publication Publication Date Title
EP2339256B1 (fr) Climatiseur et procédé de commande correspondant
US7578137B2 (en) Air-conditioning system with multiple indoor and outdoor units and control system therefor
US20210348820A1 (en) Heat load processing system
US7721559B2 (en) Multi-type air conditioner and method for controlling the same
CN101600919B (zh) 具有不同多通路管道的多通路热交换器
US7380407B2 (en) Multi air conditioning system and method for operating the same
JP2012141113A (ja) 空気調和温水機器システム
US6711909B2 (en) Outdoor fan control system of air conditioner and control method thereof
JP4051066B2 (ja) 多段運転空気調和機
EP1674807A2 (fr) Climatiseur
JP2008261513A (ja) 冷凍サイクル装置
KR101702178B1 (ko) 칠러 시스템
EP1686332A2 (fr) Climatiseur à cycle réversible
KR101029988B1 (ko) 직접팽창방식 공조기의 냉매 흐름량 변화에 따른 송풍기 풍량 자동 제어 방법
KR100423362B1 (ko) 공기조화기
KR102104818B1 (ko) 칠러
CN115279603A (zh) 车辆空调机及其控制方法
KR101116209B1 (ko) 다단 운전 공기 조화기
KR100408994B1 (ko) 멀티 에어컨의 냉방 운전 실내팬 제어방법
JP4108003B2 (ja) 冷凍システム
JP4104519B2 (ja) 冷凍システム
KR20070038287A (ko) 용량 가변형 응축기가 구비된 공기조화기 및 그 제어방법
JP4420393B2 (ja) 冷凍空調装置
WO2023058197A1 (fr) Climatiseur
JP2017203573A (ja) 空気調和機及び補助熱交換器の設置方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR LV MK YU

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR LV MK YU

17P Request for examination filed

Effective date: 20071026

AKX Designation fees paid

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20090817

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20091201