WO2025022504A1 - 圧縮機及び冷凍サイクル装置 - Google Patents

圧縮機及び冷凍サイクル装置 Download PDF

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Publication number
WO2025022504A1
WO2025022504A1 PCT/JP2023/026880 JP2023026880W WO2025022504A1 WO 2025022504 A1 WO2025022504 A1 WO 2025022504A1 JP 2023026880 W JP2023026880 W JP 2023026880W WO 2025022504 A1 WO2025022504 A1 WO 2025022504A1
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerant
compressor
mass
hydrofluoroolefin
sealed container
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2023/026880
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English (en)
French (fr)
Japanese (ja)
Inventor
晃啓 村上
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.)
Hitachi Johnson Controls Air Conditioning Inc
Original Assignee
Hitachi Johnson Controls Air Conditioning 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 Hitachi Johnson Controls Air Conditioning Inc filed Critical Hitachi Johnson Controls Air Conditioning Inc
Priority to PCT/JP2023/026880 priority Critical patent/WO2025022504A1/ja
Priority to CN202380057592.8A priority patent/CN119731432A/zh
Priority to JP2023568191A priority patent/JP7500886B1/ja
Priority to JP2024088180A priority patent/JP7588265B1/ja
Publication of WO2025022504A1 publication Critical patent/WO2025022504A1/ja
Priority to US19/049,046 priority patent/US20250180257A1/en
Anticipated expiration legal-status Critical
Pending 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
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
    • C10M105/32—Esters
    • C10M105/38—Esters of polyhydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/20—Lubricating compositions characterised by the base-material being a macromolecular compound containing oxygen
    • C10M107/22—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M107/24—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an alcohol, aldehyde, ketonic, ether, ketal or acetal radical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • 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
    • 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
    • F25B31/02—Compressor arrangements of motor-compressor units
    • F25B31/026—Compressor arrangements of motor-compressor units with compressor of rotary type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/14—Lubricant
    • F04C2210/142—Ester
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
    • F04C2210/263—HFO1234YF
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
    • F04C2210/268—R32
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel

Definitions

  • This disclosure relates to a compressor and a refrigeration cycle device.
  • the R410A refrigerant which is the mainstream refrigeration cycle equipment in refrigerators, freezers, commercial air conditioners, etc., has a high global warming potential (GWP) of 2090, and is being changed to refrigerants with lower GWP values in order to curb global warming.
  • GWP global warming potential
  • the next-generation low GWP candidate refrigerant, R454C is a mixed refrigerant that contains 78.5% by mass of R1234yf and 21.5% by mass of R32.
  • Patent Document 1 states, "A composition containing a refrigerant and a refrigeration oil, wherein the refrigerant contains at least one refrigerant selected from the group consisting of HFO-1141, HFO-1132(E/Z), HFO-1132a, HFO-1123, and HFO-1114, and the refrigeration oil has a contact angle of 0.1° ⁇ 90° with a substrate composed of at least one selected from the group consisting of engineering plastics, organic films, inorganic films, glass, and metal parts.”
  • HFO refrigerants hydrofluoroolefin refrigerants
  • HFC refrigerants hydrofluorocarbon refrigerants
  • performance such as refrigeration capacity may be lower than when they are not used in combination.
  • R454C refrigerant show that under rated temperature H condition in Table 1 of JIS-B8600 "Rated temperature conditions for refrigerant compressors", the theoretical refrigeration capacity is approximately 35% lower than that of R410A refrigerant.
  • the operating speed rotating speed
  • the PV value of the bearing increases in proportion to the increase in rotational speed. For this reason, it is preferable for the bearing to have high sliding properties.
  • An object of the present disclosure is to provide a compressor and a refrigeration cycle device in which the sliding properties of sliding parts are improved.
  • the compressor of the present disclosure comprises a high-pressure chamber-type sealed container in which a refrigerant containing 50% by mass or more of a hydrofluoroolefin refrigerant and a refrigerating machine oil are sealed, and a compression mechanism unit housed in the sealed container and having sliding parts made of an iron-based material, the refrigerating machine oil containing at least one of polyvinyl ether and polyol ester, and the kinetic viscosity of the refrigerating machine oil at 40° C. is 10 mm 2 /s or more and 40 mm 2 /s or less.
  • Other solutions will be described later in the description of the embodiment of the invention.
  • This disclosure provides a compressor and a refrigeration cycle device with improved sliding properties in the sliding parts.
  • FIG. 1 is a cross-sectional view showing a compressor of the present disclosure.
  • the compressor 100 is a device that compresses a gaseous refrigerant, for example a scroll compressor.
  • the compressor 100 includes a sealed container 1 and a compression mechanism 8 housed in the sealed container 1.
  • the compression mechanism 8 includes a frame 3, a crankshaft 4 (drive shaft), a main bearing 5, and an orbiting bearing 6. Of these, a sliding part 9 is formed at the contact part between the crankshaft 4 and the main bearing 5. Therefore, the compression mechanism 8 has the sliding part 9.
  • the sliding part 9 is not limited to between the crankshaft 4 and the main bearing 5, and may be any sliding part in the compressor 100.
  • the refrigerant sealed in the sealed container 1 contains 50% or more by mass of HFO refrigerant.
  • HFO refrigerant is an unsaturated refrigerant that contains double bonds (unsaturated bonds) in its molecules. The double bonds exhibit strong adsorption to the surface 41 formed of an iron-based material when the crankshaft 4 is in sliding contact.
  • the HFO refrigerant forms a physically adsorbed film (film 42) composed of the refrigerant on the surface 41.
  • the physically adsorbed film exhibits high sliding properties, improving the sliding properties of the crankshaft 4.
  • the formed physically adsorbed film is decomposed by frictional heat generated by sliding.
  • the decomposed physically adsorbed film changes into a chemically adsorbed film (film 42) composed of a fluorine compound.
  • the chemically adsorbed film exhibits even higher sliding properties against the sliding of the crankshaft 4 than the physically adsorbed film. This further improves the sliding properties of the crankshaft 4 at the sliding portion 9, and improves the seizure resistance and reliability of the compressor 100.
  • Figure 3 is a graph showing the relationship between the type of refrigerant and the dynamic viscosity of the refrigeration oil and the PV value.
  • the graph in Figure 3 is a relative graph with the bearing PV value when the horizontal axis is 0.24 as 100%.
  • the horizontal axis shows the actual inclination angle of the crankshaft 4 relative to the allowable inclination angle of the crankshaft 4. The closer the value on the horizontal axis is to 1, the greater the inclination of the crankshaft 4. Therefore, the larger the value on the horizontal axis, the more severe the condition of the sliding part 9.
  • the vertical axis shows the PV value (limit PV value) of the main bearing 5 ( Figure 2).
  • Example 1 which has a relatively high kinetic viscosity, it shows a large PV value and can be said to have high sliding properties (durability).
  • the graph of Example 1 is located at roughly the same position as the graph of Comparative Example 1. Therefore, it was found that Example 1, which has a relatively low kinetic viscosity, also has high sliding properties (durability). This decrease is thought to be due to the mechanism referred to in FIG. 2 above.
  • Example 1 since the kinetic viscosity of Example 1 is lower than that of Comparative Example 1, it is thought that the sliding properties would also be low if the refrigerant was not taken into consideration, but it is thought that the refrigerant of Example 1 acts to compensate for this low sliding properties. In other words, even if the kinetic viscosity of the refrigeration oil is low, the sliding properties can be improved by using an HFO refrigerant at a predetermined ratio or more.
  • the refrigeration oil contains at least one of polyvinyl ether and polyol ester.
  • Polyvinyl ether in particular has high durability against air and water. For this reason, polyvinyl ether can be suitably used in a refrigeration cycle device 200 ( Figure 4) having a long piping length, for example.
  • polyol ester has lower durability against air and water than polyvinyl ether. For this reason, polyol ester can be suitably used in a refrigeration cycle device 200 ( Figure 4) having a relatively short piping length.
  • the refrigerant sealed in the sealed container 1 contains 50% by mass or more (at least 50% by mass) of HFO refrigerant.
  • the content of HFO refrigerant is preferably 70% by mass or more and 100% by mass or less, more preferably 90% by mass or more and 100% by mass or less, based on the total amount of the sealed refrigerant. It is preferable to use a combination of HFO refrigerant and HFC refrigerant. By using them in combination, the functions of both HFO refrigerant and HFC refrigerant (e.g., sliding properties, refrigeration capacity, etc.) can be exhibited.
  • the HFO refrigerant includes, for example, at least one of R1234yf and R1234ze. These have high refrigeration capacity while also having a low global warming potential (GWP). Therefore, by including at least one of these, it is possible to obtain a high-performance compressor 100 with a small impact on the global environment.
  • GWP global warming potential
  • the refrigerant contains R32 as at least a part other than the HFO refrigerant.
  • R32 is widely used and has high refrigeration performance, and has a low GWP among HFC refrigerants. Therefore, it is possible to obtain a high-performance compressor 100 with a small burden on the global environment.
  • the HFO refrigerant includes a first refrigerant that is at least one of R1234yf or R1234ze, and a second refrigerant that is at least one of R1132(E) or R1123.
  • the first refrigerant is contained at a ratio of 50% by mass or more
  • the second refrigerant is contained at a ratio of less than 50% by mass.
  • the first refrigerant is preferably 65% by mass to 100% by mass, more preferably 70% by mass to 85% by mass, and particularly preferably 70% by mass to 80% by mass.
  • the first refrigerant is preferably 50% by mass to 100% by mass, more preferably 55% by mass to 80% by mass, and particularly preferably 55% by mass to 70% by mass.
  • FIG. 4 is a system diagram showing the refrigeration cycle device 200 of the present disclosure.
  • the refrigeration cycle device 200 is an air conditioner, but may be, for example, a refrigerator, a showcase, etc.
  • the refrigeration cycle device 200 includes a compressor 100, an outdoor heat exchanger 26 (an example of a condenser or evaporator), an electronic expansion valve 27 for heating and an electronic expansion valve 29 for cooling (both are examples of expansion mechanisms), and an indoor heat exchanger 11 (an example of an evaporator or condenser).
  • the compressor 100, the outdoor heat exchanger 26, the electronic expansion valves 27 and 29, and the indoor heat exchanger 11 are connected by piping (not shown) to circulate the refrigerant through the discharge circuit 14, forming a refrigeration cycle.
  • the refrigeration cycle is a closed circuit.
  • a blower 25 is attached to the outdoor heat exchanger 26.
  • a blower 10 is attached to the indoor heat exchanger 11.
  • the refrigeration cycle device 200 further includes an oil separator 23 provided in the discharge circuit 14 of the compressor 100, and a series circuit 12 that returns refrigeration oil from the oil separator 23 to the compressor 100.
  • the series circuit 12 is a circuit that returns refrigeration oil to an oil reservoir M ( Figure 1) formed at the bottom inside of the compressor 100.
  • the refrigeration cycle device 200 further includes a four-way switching valve 24 that switches the circulation direction of the refrigerant, a receiver 28, an accumulator 15, and a suction circuit 13.
  • the refrigeration cycle device 200 can use, for example, R454C, which is the refrigerant used in the first embodiment above.
  • the refrigeration cycle device 200 includes the compressor 100 described with reference to Figures 1 to 3 above. This provides high sliding performance at the sliding parts 9 ( Figure 1) of the compressor 100, improving the reliability of the refrigeration cycle device 200.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Emergency Medicine (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Lubricants (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
PCT/JP2023/026880 2023-07-21 2023-07-21 圧縮機及び冷凍サイクル装置 Pending WO2025022504A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/JP2023/026880 WO2025022504A1 (ja) 2023-07-21 2023-07-21 圧縮機及び冷凍サイクル装置
CN202380057592.8A CN119731432A (zh) 2023-07-21 2023-07-21 压缩机以及制冷循环装置
JP2023568191A JP7500886B1 (ja) 2023-07-21 2023-07-21 圧縮機及び冷凍サイクル装置
JP2024088180A JP7588265B1 (ja) 2023-07-21 2024-05-30 圧縮機、空調機及び冷凍機
US19/049,046 US20250180257A1 (en) 2023-07-21 2025-02-10 Compressor and refrigeration cycle device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2023/026880 WO2025022504A1 (ja) 2023-07-21 2023-07-21 圧縮機及び冷凍サイクル装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US19/049,046 Continuation US20250180257A1 (en) 2023-07-21 2025-02-10 Compressor and refrigeration cycle device

Publications (1)

Publication Number Publication Date
WO2025022504A1 true WO2025022504A1 (ja) 2025-01-30

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JP7500886B1 (ja) 2023-07-21 2024-06-17 日立ジョンソンコントロールズ空調株式会社 圧縮機及び冷凍サイクル装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013051271A1 (ja) * 2011-10-06 2013-04-11 パナソニック株式会社 冷凍装置
WO2016189698A1 (ja) * 2015-05-27 2016-12-01 三菱電機株式会社 圧縮機及び冷凍サイクル装置
WO2018083981A1 (ja) * 2016-11-04 2018-05-11 日立ジョンソンコントロールズ空調株式会社 電動圧縮機及び冷凍空調装置
WO2018230515A1 (ja) * 2017-06-12 2018-12-20 ダイキン工業株式会社 冷媒を含有する組成物、その使用、それを用いた冷凍方法、及びそれを含む冷凍機
JP2022089538A (ja) * 2020-12-04 2022-06-16 日立ジョンソンコントロールズ空調株式会社 冷凍サイクル装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06184692A (ja) * 1992-12-16 1994-07-05 Riken Corp 回転式圧縮機ローラ
JPH09287057A (ja) * 1996-04-19 1997-11-04 Riken Corp 鋳鋼製回転式圧縮機ローラ
JP7500886B1 (ja) 2023-07-21 2024-06-17 日立ジョンソンコントロールズ空調株式会社 圧縮機及び冷凍サイクル装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013051271A1 (ja) * 2011-10-06 2013-04-11 パナソニック株式会社 冷凍装置
WO2016189698A1 (ja) * 2015-05-27 2016-12-01 三菱電機株式会社 圧縮機及び冷凍サイクル装置
WO2018083981A1 (ja) * 2016-11-04 2018-05-11 日立ジョンソンコントロールズ空調株式会社 電動圧縮機及び冷凍空調装置
WO2018230515A1 (ja) * 2017-06-12 2018-12-20 ダイキン工業株式会社 冷媒を含有する組成物、その使用、それを用いた冷凍方法、及びそれを含む冷凍機
JP2022089538A (ja) * 2020-12-04 2022-06-16 日立ジョンソンコントロールズ空調株式会社 冷凍サイクル装置

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CN119731432A (zh) 2025-03-28
JP7500886B1 (ja) 2024-06-17
JPWO2025022504A1 (https=) 2025-01-30
JP7588265B1 (ja) 2024-11-21
US20250180257A1 (en) 2025-06-05
JP2025016346A (ja) 2025-01-31

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