FI4030122T3 - Outdoor unit and refrigeration cycle apparatus - Google Patents

Outdoor unit and refrigeration cycle apparatus Download PDF

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Publication number
FI4030122T3
FI4030122T3 FIEP19944933.1T FI19944933T FI4030122T3 FI 4030122 T3 FI4030122 T3 FI 4030122T3 FI 19944933 T FI19944933 T FI 19944933T FI 4030122 T3 FI4030122 T3 FI 4030122T3
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FI
Finland
Prior art keywords
flow path
coolant
outdoor unit
condenser
expansion valve
Prior art date
Application number
FIEP19944933.1T
Other languages
Finnish (fi)
Inventor
Tomotaka Ishikawa
Yusuke Arii
Motoshi Hayasaka
Original Assignee
Mitsubishi Electric Corp
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Filing date
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Publication of FI4030122T3 publication Critical patent/FI4030122T3/en

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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
    • 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
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • 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
    • F25B49/005—Arrangement or mounting of control or safety devices of 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • 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
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0409—Refrigeration circuit bypassing means for the 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
    • 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
    • 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
    • F25B2500/19—Calculation of parameters
    • 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
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/222—Detecting refrigerant leaks
    • 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
    • F25B2500/24—Low amount of refrigerant in the system
    • 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
    • F25B2600/02—Compressor control
    • 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
    • F25B2600/05—Refrigerant levels
    • 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
    • F25B2600/23—Time delays
    • 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
    • F25B2600/2501—Bypass 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2509—Economiser 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/195—Pressures of the condenser
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2116—Temperatures of a condenser
    • F25B2700/21161—Temperatures of a condenser of the fluid heated by the condenser
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2116—Temperatures of a condenser
    • F25B2700/21163—Temperatures of a condenser of the refrigerant at the outlet of the condenser

Claims (7)

PatenttivaatimuksetPatent Claims 1. Jäähdytyskiertolaitteiston ulkoyksikkö (2), joka ulkoyksikkö (2) on yhdistettävissä kuormituslaitteeseen (3), joka sisältää paisuntalaitteen (50) ja höyrystimen (60), joka ulkoyksikkö käsittää: jäähdytysaineen ulostuloaukon ja jäähdytysaineen sisäänmenoaukon kuormituslaitteeseen yhdistämiseksi; erään ensimmäisen virtausreitin (F1), joka on virtausreitti jäähdyty- saineen sisäänmenoaukosta jäähdytysaineen ulostuloaukkoon, joka ensimmäinen virtausreitti on konfiguroitu muodostamaan, yhdessä kuormituslaitteen kanssa, — kiertovirtausreitin, jonka läpi virtaa jäähdytysainetta; kompressorin (10) ja lauhduttimen (20), jotka ovat ensimmäisellä vir- tausreitillä (F1) peräkkäisessä järjestyksessä matkalla jäähdytysaineen sisään- menoaukosta (P12) jäähdytysaineen ulostuloaukkoa (P02) kohti; erään toisen virtausreitin (F2), joka on konfiguroitu haarautumaan en- simmäisen virtausreitin (F1) osuudesta lauhduttimen (20) ja jäähdytysaineen ulostuloaukon (PO2) välissä ja palauttamaan kompressoriin (10) jäähdytysai- neen, joka on kulkenut lauhduttimen (10) läpi; erään ensimmäisen paisuntaventtiilin (71), säiliön (73) ja erään toisen paisuntaventtiilin (72), jotka ovat toisella virtausreitillä (F2) peräkkäisessä järjes- tyksessä matkalla haarautumiskohdasta, jossa toinen virtausreitti (F2) haarautuu ensimmäisestä virtausreitistä (F1); ja ohjaimen (100), joka on konfiguroitu ohjaamaan kompressoria (10) sekä ensimmäistä ja toista paisuntaventtiiliä (71, 72), joka ohjain (100) on konfi- guroitu ilmoittamaan, että jäähdytysainetta on riittämättömästi, kun aikaväli, jolla toisen paisuntaventtiilin (72) avautumisaste on ylärajalla, ylittää määritellyn ai- kavälin.1. The outdoor unit (2) of the cooling circulation equipment, which outdoor unit (2) can be connected to the load device (3), which contains the expansion device (50) and the evaporator (60), which outdoor unit comprises: a coolant outlet and a coolant inlet for connecting to the load device; a first flow path (F1), which is a flow path from the coolant inlet to the coolant outlet, which first flow path is configured to form, together with the loading device, — a circulating flow path through which the coolant flows; of the compressor (10) and the condenser (20), which are in the first flow path (F1) in sequential order on the way from the coolant inlet (P12) towards the coolant outlet (P02); a second flow path (F2) configured to branch from the portion of the first flow path (F1) between the condenser (20) and the refrigerant outlet (PO2) and to return to the compressor (10) the refrigerant that has passed through the condenser (10); a first expansion valve (71), a tank (73) and a second expansion valve (72) which are in the second flow path (F2) in sequential order on the way from the branching point where the second flow path (F2) branches off from the first flow path (F1); and a controller (100) configured to control the compressor (10) and the first and second expansion valves (71, 72), which controller (100) is configured to signal that there is insufficient refrigerant when the time interval in which the second expansion valve (72) the degree of opening is at the upper limit, exceeds the defined time interval. 2. Patenttivaatimuksen 1 mukainen ulkoyksikkö (2, 2A), joka lisäksi käsittää erään ensimmäisen lämpötila-anturin (121), joka on konfiguroitu ilmai- semaan jäähdytysaineen lämpötilan lauhduttimen (20) jäähdytysaineenpoisto- osassa ensimmäisellä virtausreitillä (F1), jossa ohjain (100, 100A) on konfiguroitu ohjaamaan toisen paisuntaventtii- lin (72) avautumisastetta ensimmäisen lämpötila-anturin (121) annon mukaan.2. The outdoor unit (2, 2A) according to claim 1, which further comprises a first temperature sensor (121) configured to detect the coolant temperature in the coolant removal part of the condenser (20) in the first flow path (F1), where the controller (100, 100A) is configured to control the degree of opening of the second expansion valve (72) according to the input from the first temperature sensor (121). 3. Patenttivaatimuksen 2 mukainen ulkoyksikkö (2), joka lisäksi käsit- tää paineanturin (111), joka on konfiguroitu ilmaisemaan jäähdytysaineen pai-3. The outdoor unit (2) according to claim 2, which further comprises a pressure sensor (111) configured to detect the position of the coolant neen lauhduttimen (20) jäähdytysaineenpoisto-osassa ensimmäisellä virtausrei- tilla (F1), jossa kun aikaväli, jolla toisen paisuntaventtiilin (72) avautumisaste on yla- rajalla, ylittää määritellyn aikavälin ja ensimmäisen lämpötila-anturin (121) an- non ja paineanturin (111) annon perusteella laskettu jäähdytysaineen jäähtymä ei ole sama kuin tavoitearvo, ohjain (100) määrittelee, että jäähdytysainetta on riittämättömästi.in the coolant removal part of the condenser (20) in the first flow path (F1), where when the time interval in which the degree of opening of the second expansion valve (72) is at the upper limit exceeds the defined interval and the output of the first temperature sensor (121) and the pressure sensor (111) ) the cooling of the coolant calculated based on the input is not the same as the target value, the controller (100) determines that there is insufficient coolant. 4. Patenttivaatimuksen 3 mukainen ulkoyksikkö, jossa jäähdytysaine on jadhdytysainetta, jota käytetään lauhduttimen (20) paineella, joka on pienempi kuin kriittinen paine.4. The outdoor unit according to claim 3, wherein the cooling agent is a cooling agent, which is used at a pressure of the condenser (20), which is lower than the critical pressure. 5. Patenttivaatimuksen 2 mukainen ulkoyksikkö (2A), joka lisäksi kä- sittää erään toisen lämpötila-anturin (123), joka on konfiguroitu ilmaisemaan lauhduttimeen (20) syötettävän ulkoilman lämpötilan, jossa kun aikaväli, jolla toisen paisuntaventtiilin (72) avautumisaste on ylä- rajalla, ylittää määritellyn aikavälin ja ensimmäisen lämpötila-anturin (121) il- maiseman lämpötilan ja toisen lämpötila-anturin (123) ilmaiseman lämpötilan ero on pienempi kuin määritelty arvo, ohjain (100A) määrittelee, että jäähdyty- sainetta on riittämättömästi.5. The outdoor unit (2A) according to claim 2, which additionally comprises a second temperature sensor (123) configured to detect the temperature of the outdoor air supplied to the condenser (20), where when the time interval in which the degree of opening of the second expansion valve (72) is above at the limit, exceeds the defined interval and the difference between the outdoor temperature of the first temperature sensor (121) and the temperature detected by the second temperature sensor (123) is less than the defined value, the controller (100A) determines that there is insufficient coolant. 6. Patenttivaatimuksen 5 mukainen ulkoyksikkö, jossa jäähdytysaine on hiilidioksidi, jota käytetään lauhduttimen (20) paineella, joka on kriittinen paine tai suurempi.6. An outdoor unit according to claim 5, wherein the cooling agent is carbon dioxide, which is used at a pressure of the condenser (20), which is a critical pressure or higher. 7. Jäähdytyskiertolaitteisto, joka käsittää: minkä tahansa patenttivaatimuksen 1-6 mukaisen ulkoyksikön (2, 2A) ja kuormituslaitteen (3).7. Refrigeration circulation equipment comprising: an outdoor unit (2, 2A) according to any of claims 1-6 and a load device (3).
FIEP19944933.1T 2019-09-09 2019-09-09 Outdoor unit and refrigeration cycle apparatus FI4030122T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/035407 WO2021048905A1 (en) 2019-09-09 2019-09-09 Outdoor unit and refrigeration cycle device

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Publication Number Publication Date
FI4030122T3 true FI4030122T3 (en) 2023-07-28

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EP (1) EP4030122B1 (en)
JP (1) JP7199554B2 (en)
CN (1) CN114364934B (en)
DK (1) DK4030122T3 (en)
ES (1) ES2950759T3 (en)
FI (1) FI4030122T3 (en)
WO (1) WO2021048905A1 (en)

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JP2024043621A (en) * 2022-09-20 2024-04-02 ダイキン工業株式会社 Heat source unit and refrigeration device

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Publication number Priority date Publication date Assignee Title
JP3291753B2 (en) * 1992-04-08 2002-06-10 ダイキン工業株式会社 Refrigerant charging amount detection device for refrigeration equipment
JP4569708B2 (en) * 2008-12-05 2010-10-27 ダイキン工業株式会社 Refrigeration equipment
JP5411643B2 (en) * 2009-10-05 2014-02-12 パナソニック株式会社 Refrigeration cycle apparatus and hot water heater
JP5334909B2 (en) * 2010-04-20 2013-11-06 三菱電機株式会社 Refrigeration air conditioner and refrigeration air conditioning system
JP5623366B2 (en) * 2011-10-13 2014-11-12 福島工業株式会社 Refrigerant leak detection method and refrigeration equipment
JP5927553B2 (en) * 2012-02-13 2016-06-01 パナソニックＩｐマネジメント株式会社 Refrigeration equipment
JP5886463B1 (en) * 2015-08-07 2016-03-16 伸和コントロールズ株式会社 Air conditioner and operation method thereof
JP2017053566A (en) * 2015-09-10 2017-03-16 ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド Refrigeration cycle device
JP6611929B2 (en) * 2016-05-19 2019-11-27 三菱電機株式会社 Refrigeration equipment
US11384965B2 (en) * 2017-04-04 2022-07-12 Mitsubishi Electric Corporation Refrigeration cycle apparatus performing a refrigerant circulation operation using a liquid pump
KR102354891B1 (en) * 2017-05-31 2022-01-25 삼성전자주식회사 Air conditioner and control method thereof
CN107940826B (en) * 2017-11-10 2020-04-03 广东美的暖通设备有限公司 Multi-split air conditioning system and refrigerant distribution control method and device thereof

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ES2950759T3 (en) 2023-10-13
EP4030122A1 (en) 2022-07-20
EP4030122B1 (en) 2023-06-21
DK4030122T3 (en) 2023-07-24
CN114364934B (en) 2023-03-21
JPWO2021048905A1 (en) 2021-03-18
WO2021048905A1 (en) 2021-03-18
CN114364934A (en) 2022-04-15
JP7199554B2 (en) 2023-01-05
EP4030122A4 (en) 2022-09-21

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