WO2012032765A1 - 圧縮機およびそれを用いた冷凍サイクル装置 - Google Patents
圧縮機およびそれを用いた冷凍サイクル装置 Download PDFInfo
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- WO2012032765A1 WO2012032765A1 PCT/JP2011/004989 JP2011004989W WO2012032765A1 WO 2012032765 A1 WO2012032765 A1 WO 2012032765A1 JP 2011004989 W JP2011004989 W JP 2011004989W WO 2012032765 A1 WO2012032765 A1 WO 2012032765A1
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- refrigerant
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- vane
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/08—Rotary pistons
- F01C21/0809—Construction of vanes or vane holders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/063—Lubrication specially adapted for elastic fluid pumps
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- 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
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
- F04C18/3562—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation
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- 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
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- 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
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- 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
- F04C2230/00—Manufacture
- F04C2230/20—Manufacture essentially without removing material
- F04C2230/21—Manufacture essentially without removing material by casting
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- 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
- F04C2230/00—Manufacture
- F04C2230/20—Manufacture essentially without removing material
- F04C2230/22—Manufacture essentially without removing material by sintering
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- 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
- F04C2230/00—Manufacture
- F04C2230/90—Improving properties of machine parts
- F04C2230/91—Coating
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- 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
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- 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
- F05C2201/0403—Refractory metals, e.g. V, W
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- 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
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- 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
- F05C2203/00—Non-metallic inorganic materials
- F05C2203/08—Ceramics; Oxides
- F05C2203/0804—Non-oxide ceramics
- F05C2203/083—Nitrides
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- 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
- F05C2251/00—Material properties
- F05C2251/10—Hardness
Definitions
- the present invention relates to a compressor using a refrigerant mainly composed of a hydrofluoroolefin having a low global warming potential and having a carbon double bond, and a refrigeration cycle apparatus using the same.
- HFC system refrigerant an HFC (hydrofluorocarbon) system having an ozone layer depletion coefficient of zero.
- FIGS. 7 to 9 A compressor and refrigeration cycle apparatus using an HFC refrigerant will be described with reference to FIGS. 7 to 9 (see, for example, Patent Documents 1 and 2).
- FIG. 7 is a longitudinal sectional view of a rotary compressor described in Patent Document 1 using an HFC refrigerant.
- the stator 2a of the motor 2 is fixed to the top of the sealed container 1.
- a compression mechanism 5 having a shaft 4 driven by the rotor 2 b of the motor 2 is fixed to the lower part of the hermetic container 1.
- a bearing 7 is fixed to the upper end of the cylinder 6 of the compression mechanism 5 with a bolt or the like, and a bearing 8 is fixed to the lower end of the cylinder 6 with a bolt or the like.
- a piston 9 is disposed in the cylinder 6.
- the eccentric part 4a of the shaft 4 is inserted in the piston 9, and the piston 9 rotates eccentrically by this eccentric part 4a.
- R410A (mixture of HFC32 and HFC125) is sealed in the sealed container 1 as a refrigerant.
- POE polyol ester
- PVE polyvinyl ether
- FIG. 8 is a cross-sectional view of a rotary compressor described in Patent Document 1 that uses an HFC refrigerant.
- a suction chamber 13 into which the refrigerant is sucked and a compression chamber 14 into which the refrigerant is compressed are formed.
- the refrigerant is sucked into the suction chamber 13 through the suction port 12 provided in the cylinder 6.
- the refrigerant in the compression chamber 14 is compressed by the leftward rotation (in the direction of the arrow) of the piston 9, passes through the discharge notch 15, and is discharged into the sealed container 1 through the discharge port (not shown).
- the compressed refrigerant discharged into the hermetic container 1 passes through the gap of the motor 2 and is discharged to the outside of the hermetic container 1 through the discharge pipe 16 disposed at the upper part of the hermetic container 1. At that time, the mist of the refrigerating machine oil 103 existing around is also discharged together.
- the rotary compressor 20 compresses the low-temperature / low-pressure refrigerant gas and discharges the high-temperature / high-pressure refrigerant gas toward the condenser 21.
- the HFC-based refrigerant gas sent to the condenser 21 releases its heat into the air, becomes a high-temperature / high-pressure refrigerant liquid, and is sent to an expansion mechanism (for example, an expansion valve or a capillary tube) 22.
- the high-temperature and high-pressure refrigerant liquid that passes through the expansion mechanism 22 becomes low-temperature and low-pressure wet steam due to the throttling effect, and is sent to the evaporator 23.
- the refrigerant that has entered the evaporator 23 absorbs heat from the surroundings and evaporates.
- the low-temperature and low-pressure refrigerant gas exiting the evaporator 23 is sucked into the rotary compressor 20. Such a cycle is repeated.
- this HFC-based refrigerant is difficult to be decomposed in the atmosphere and has a very high global warming potential (hereinafter referred to as GWP), which has become a problem in recent years from the viewpoint of protecting the global environment. Yes.
- GWP global warming potential
- a refrigerant mainly composed of a hydrofluoroolefin having a carbon double bond has a low global warming potential (GWP), but is easily decomposed and has a problem in stability as compared with an HFC refrigerant.
- GWP global warming potential
- the heat generated in the sliding portion of the rotary compressor such as the tip 10a of the compressor vane 10 and the outer peripheral surface of the piston 9 causes decomposition and polymerization of the refrigerant and the refrigerating machine oil, resulting in generation of sludge.
- the rotary compressor breaks down and the sludge is clogged in the refrigeration cycle apparatus.
- the inventor added an antioxidant or the like to the refrigerating machine oil in order to suppress the generation of the reaction product of the refrigerant.
- the decomposition of the refrigerant is suppressed and the generation of the fluorine-based compound contained in the reaction product is also suppressed.
- this fluorine-based compound is adsorbed on sliding portions such as the tip of the vane and the outer peripheral surface of the piston to improve the wear resistance. Therefore, if the production of such a fluorine-based compound is suppressed, wear of the sliding portion proceeds, and the reliability of the compressor, that is, the refrigeration cycle apparatus using the compressor may not be maintained.
- the inventor considered adding an antiwear agent such as an extreme pressure additive to the refrigerator oil.
- an antiwear agent such as an extreme pressure additive
- the inventor uses a refrigerant mainly composed of a hydrofluoroolefin having a carbon double bond, it is difficult to obtain an anti-wear effect only by adding an anti-wear agent to the refrigerating machine oil. Found by. Therefore, it is an important issue to increase the effect of the antiwear agent and maintain the reliability with the compressor, that is, the refrigeration cycle apparatus.
- the present invention provides a highly reliable compressor that can suppress the generation of sludge by suppressing the decomposition and polymerization of refrigerant and refrigeration oil and maintain the wear resistance of the compressor, and a refrigeration using the same.
- An object is to provide a cycle device.
- the present invention is configured as follows.
- a compressor used in a refrigeration cycle apparatus which does not have a single refrigerant of a hydrofluoroolefin having a carbon double bond or a double bond of the hydrofluoroolefin and carbon.
- HRC 47-55 wherein a mixed refrigerant containing hydrofluorocarbon is used, the refrigerator oil containing an additive that suppresses deterioration of the refrigerator oil and an antiwear agent is used, and is exposed to the mixed refrigerant and the refrigerator oil.
- a compressor having a sliding portion with hardness is provided.
- the refrigeration cycle apparatus includes the above-described compressor, a condenser, an expansion mechanism, and an evaporator, and forms a refrigeration cycle that compresses, condenses, expands, and evaporates the refrigerant. Is provided.
- the decomposition and polymerization of the refrigerant and the refrigerating machine oil are suppressed, whereby the generation of sludge is suppressed.
- the wear resistance of the sliding portion of the compressor, for example, the vane and the piston can be maintained. As a result, the reliability of the compressor and the refrigeration cycle apparatus using the compressor can be ensured.
- the compressor according to the present invention is a compressor used in a refrigeration cycle apparatus, and is a single refrigerant of hydrofluoroolefin having a carbon double bond or a hydrofluorine having no carbon double bond.
- a mixed refrigerant containing fluorocarbon is used, the refrigerator oil containing an additive for suppressing deterioration of the refrigerator oil and an antiwear agent is used, and exposed to the mixed refrigerant and the refrigerator oil.
- HRC Rockwell Hardness C
- -Scale Rockwell hardness C scale
- the decomposition and polymerization of the refrigerant and the refrigerating machine oil are suppressed, thereby suppressing the generation of sludge. Further, it is possible to maintain the wear resistance of the sliding portion of the compressor, for example, the piston and vane that slide with each other. As a result, the reliability of the compressor can be ensured.
- the vane may be made from an iron-based material and nitrided, or made from sintered alloy steel and subjected to a sintering process and a quenching process.
- the vane When the vane is made of an iron-based material and is nitrided, the vane can be made at a low cost. As a result, the compressor can be mass-produced. Further, when the vane is made of sintered alloy steel and subjected to sintering treatment and quenching treatment, a hard structure in which W, Mo, Cr, and V-based carbides are dispersed in a fine martensite structure can be obtained. it can.
- the vanes are preferably made from high speed tool steel. Thereby, the vane excellent in abrasion resistance can be obtained.
- the vane may be ceramic coated.
- the ceramic coating can suppress an increase in temperature due to friction between the tip of the vane and the outer peripheral surface of the piston, and as a result, decomposition of the refrigerant can be suppressed.
- the polarity of the tip of the vane is maintained by the ceramic coating, and an extreme pressure layer (abrasion inhibitor film) is formed on the surface of the tip of the vane. Thereby, abnormal wear of the vane can be suppressed.
- a nitride or carbide of Ti titanium, V (vanadium), Ta (tantalum), W (tungsten), or Nb (niobium) may be coated on the surface of the vane by ceramic coating.
- Ti titanium
- V vanadium
- Ta tantalum
- W tungsten
- Nb niobium
- the ceramic coating thickness at the tip of the vane contacting the piston is preferably 5 to 15 ⁇ m.
- Ceramic coating is preferably performed only on the tip of the vane. Since the ceramic coating is applied only to the tip of the vane that slides under severe sliding conditions, the coating cost can be reduced.
- the vane may be made from a ceramic material. Thereby, the temperature rise by friction can be suppressed between the front-end
- the polarity of the tip of the vane is maintained, and an extreme pressure layer (abrasion inhibitor film) is formed on the surface of the tip of the vane. Thereby, abnormal wear of the vane can be suppressed.
- the piston may be made from cast iron.
- the surface hardness can be effectively increased by quenching and tempering, and carbon contained in the cast iron functions as a solid lubricant during sliding.
- the wear resistance of the piston is improved and the temperature rise due to friction can be suppressed, and as a result, the decomposition and polymerization of the refrigerant and the refrigerating machine oil are suppressed. That is, the generation of sludge can be suppressed.
- a piston can be produced cheaply by using cast iron. As a result, the compressor can be mass-produced.
- Cast iron which is a material of the piston, preferably contains 0.4 to 1.2 wt% chromium and 0.15 to 0.7 wt% molybdenum.
- carbonized_material in cast iron is stabilized, a cast iron structure
- the cast iron that is the material of the piston preferably contains 0.15 to 0.4 wt% of nickel. Thereby, the coarsening of the graphite is suppressed, the cast iron structure can be made dense, and the mechanical properties of the cast iron are improved. Further, the sliding surface of the piston can be effectively finished to a desired surface property. Furthermore, crystallization is suppressed by promoting graphitization, and thereby good machinability can be obtained. As a result, the productivity of the piston, that is, the productivity of the compressor is improved.
- the surface of the vane and the surface of the piston preferably have a surface roughness of Ra 0.4 ⁇ m or less.
- the familiarity period between the surface of the vane and the surface of the piston is shortened, and a uniform extreme pressure layer (antiwear film) is formed on the surface at an early stage. That is, the period of the high temperature state in which the refrigerant and the refrigerating machine oil are easily decomposed and polymerized is shortened. As a result, the generation of sludge can be suppressed,
- the refrigerant includes at least one of tetrafluoropropene or trifluoropropene, which is a kind of hydrofluoroolefin, and may have a global warming potential of 5 to 750, preferably 5 to 350.
- tetrafluoropropene or trifluoropropene which is a kind of hydrofluoroolefin, and may have a global warming potential of 5 to 750, preferably 5 to 350.
- Such a refrigerant can provide a compressor with a small environmental load.
- the refrigerant is mainly composed of tetrafluoropropene or trifluoropropene, which is a kind of hydrofluoroolefin, and difluoromethane and pentafluoroethane preferably have a global warming potential of 5 or more and 750 or less, preferably 5 or more and 350 What was mixed so that it might become the following may be sufficient.
- a refrigerant can provide a compressor with a small environmental load.
- refrigerating machine oils (1) polyoxyalkylene glycols, (2) polyvinyl ethers, (3) poly (oxy) alkylene glycols or their monoether and polyvinyl ether copolymers, (4) polyol esters and polycarbonates (5) Synthetic oil mainly containing alkylbenzenes, or (6) Synthetic oil mainly containing ⁇ -olefins may be used.
- refrigerating machine oil the decomposition and polymerization of the refrigerant and the refrigerating machine oil are suppressed, thereby suppressing the generation of sludge. Further, it is possible to maintain the wear resistance of the sliding portion of the compressor, for example, the piston and vane that slide with each other. As a result, the reliability of the compressor can be ensured.
- the refrigeration cycle apparatus includes the above-described compressor, condenser, expansion mechanism, and evaporator, and forms a refrigeration cycle that compresses, condenses, expands, and evaporates the refrigerant.
- a refrigeration cycle apparatus the decomposition and polymerization of the refrigerant and the refrigeration oil are suppressed, thereby suppressing the generation of sludge.
- FIG. 1 shows a basic refrigeration cycle apparatus according to an embodiment of the present invention.
- This refrigeration cycle apparatus has a compressor 120 as shown in FIG.
- the compressor 120 compresses the low-temperature / low-pressure refrigerant gas and discharges the high-temperature / high-pressure refrigerant gas toward the condenser 121.
- the refrigerant gas sent to the condenser 121 becomes a high-temperature and high-pressure refrigerant liquid while releasing its heat into the air, and is sent to an expansion mechanism (for example, an expansion valve or a capillary tube) 122.
- an expansion mechanism for example, an expansion valve or a capillary tube
- the high-temperature and high-pressure refrigerant liquid that passes through the expansion mechanism 122 becomes low-temperature and low-pressure wet steam by the throttling effect and is sent to the evaporator 123.
- the refrigerant that has entered the evaporator 123 absorbs heat from the surroundings and evaporates. Then, the low-temperature and low-pressure refrigerant gas exiting the evaporator 123 is sucked into the rotary compressor 120. Such a cycle is repeated.
- FIGS. 2 and 3 A compressor 120 used in such a refrigeration cycle apparatus is shown in FIGS.
- the compressor 120 shown in FIGS. 2 and 3 is a rotary compressor.
- the rotary compressor 120 has a stator 102 a of a motor 102 fixed to the upper part of the hermetic container 101.
- a compression mechanism 105 having a shaft 104 driven by the rotor 102 b of the motor 102 is fixed to the lower portion of the sealed container 101.
- a bearing 107 is fixed to the upper end of the cylinder 106 of the compression mechanism 105, and a bearing 108 is fixed to the lower end with a bolt or the like.
- a piston 109 is disposed in the cylinder 106.
- An eccentric portion 104a of the shaft 104 is inserted into the piston 109, and the piston 109 rotates eccentrically by the eccentric portion 104a.
- a vane 110 is inserted into the vane groove 106 a of the cylinder 106, and a vane spring 111 is installed on the back portion 110 b of the vane 110.
- the vane spring 111 urges the vane 110 so that the tip 110 a of the vane 110 abuts on the outer peripheral surface of the piston 109.
- HFO1234yf refrigerant tetrafluoropropene
- a refrigerating machine oil 103 containing a base oil compatible with the HFO 1234yf refrigerant is stored at the bottom of the sealed container 101. It is possible to use the refrigerating machine oil 103 mainly composed of at least one of the base oils of polyol ester, polyvinyl ether and polyalkylene glycol. In the case of the present embodiment, the refrigerating machine oil 103 containing only polyol ester as a main component is used.
- the polyol ester refrigerating machine oil 103 is synthesized by a dehydration reaction between a polyhydric alcohol and a saturated or unsaturated fatty acid.
- a polyhydric alcohol that contributes to the viscosity of the refrigerating machine oil 103
- neopentyl glycol, pentaerythritol, dipentaerythritol and the like are used.
- saturated fatty acids straight chain fatty acids such as hexanoic acid, heptanoic acid, nonanoic acid and decanoic acid, and branched chain fatty acids such as 2-methylhexanoic acid, 2-ethylhexanoic acid and 3,5,5-trimethylhexanoic acid Is used.
- Polyol ester oils containing linear fatty acids have good sliding properties but poor hydrolyzability, and ester oils containing branched chain fatty acids have the advantage of being difficult to hydrolyze, although they have slightly poor sliding properties. Should be noted.
- a sulfur-based extreme pressure additive that prevents wear and an additive that suppresses deterioration of the refrigerating machine oil are added.
- Various additives such as an antioxidant such as dibutyl-p-cresol, an acid scavenger such as an epoxy-containing compound, a metal deactivator, and an antifoaming agent are used as additives for suppressing the deterioration of refrigerating machine oil. It is selectively added to the machine oil 103.
- sulfur-based extreme pressure additives for preventing wear include sulfurized fats and oils, sulfurized fatty acids, sulfurized esters, sulfurized olefins, dialkyl polysulfides, dibenzyl disulfides, oligomer polysulfides, and the like. These sulfur-based extreme pressure additives preferably have 3 or less sulfur bridges. When the sulfur cross-linking length is 4 or more, sulfur is likely to be released into the refrigerating machine oil 103, which may corrode copper used in piping or the like in the refrigeration cycle.
- Some metal deactivators have the function of preventing sulfur copper pipe corrosion, and benzotriazoles can be used as such metal deactivators.
- a phosphorus-based extreme pressure additive may be used.
- phosphate esters such as tricresyl phosphate and triphenyl phosphate, phosphite esters, amine salts of acidic phosphate esters, and the like can be used.
- acidic phosphates such as tricresyl phosphate and triphenyl phosphate, which are excellent in compatibility with the refrigerating machine oil 103, are preferable.
- the phosphorus-based extreme pressure additive has a higher effect of preventing wear under a low load than the sulfur-based extreme pressure additive. Therefore, the combined use of a sulfur-based extreme pressure additive and a phosphorus-based extreme pressure additive is optimal for a compressor of a refrigeration cycle apparatus that is operated in a wide frequency range by inverter control.
- the piston 109 continues to push the front end portion 110a of the vane 110 while rotating eccentrically in the cylinder 106, whereby the refrigerant is sucked, compressed, and discharged.
- the tip portion 110a of the vane 110 serving as the sliding portion has higher hardness than the portion other than the tip portion 110a of the vane 110 by forming a coating film.
- the coating film include CrN (chromium nitride), DLC (diamond like carbon (diamond-like carbon)), and TiN (titanium nitride).
- the coating film on the tip portion 110a of the vane 110 has a polarity maintaining effect, and is configured by, for example, graphite or the like having connected benzene rings dispersed therein.
- the coating film is polarized by being induced by the polarity of the refrigeration oil 103, and the coating film has polarity.
- the extreme pressure additive in the refrigerating machine oil 103 is adsorbed and an extreme pressure layer (extreme pressure additive film) is formed on the coating film.
- the extreme pressure layer formed on the sliding portion in this way can be used even under severe sliding conditions (for example, when the compressor starts operating at maximum capacity after being left for half a day at an outside temperature of ⁇ 10 ° C. or lower). ),
- the lubricating oil in the sliding portion is not insufficient, and abnormal wear of the sliding portion is suppressed.
- the refrigerant (HFO 1234yf refrigerant) is sucked into the suction chamber 113 through the suction port 112 provided in the cylinder 106. Further, the refrigerant in the compression chamber 114 constituted by the vane 110, the piston 109, and the cylinder 106 is compressed by the leftward rotation (arrow direction) of the piston 109, passes through the discharge notch 115, and is discharged to the discharge port (see FIG. (Not shown) is discharged into the sealed container 101. The compressed refrigerant discharged into the sealed container 101 passes through the gap of the motor 102 and is discharged into the refrigeration cycle via the discharge pipe 116 disposed at the upper part of the sealed container 101.
- the mist of the refrigerating machine oil 103 existing around is also discharged together.
- the refrigerant discharged during the refrigeration cycle sequentially passes through the condenser 121, the expansion mechanism 122, and the evaporator 123, and is again sucked into the suction chamber 113 through the suction port 112 of the compressor. .
- the sliding parts with the severest sliding conditions are the tip part 110a of the vane 110 and the outer peripheral surface of the piston 109 which are in contact with each other.
- a high discharge pressure acts on the back part 110 b of the vane 110.
- a large force corresponding to the differential pressure with respect to the pressure in the cylinder 106 acts on the vane 110.
- the region between the front end portion 110a and the outer peripheral surface of the piston 109 is in a state of mixed lubrication or boundary lubrication.
- the vane 110 is made of steel such as SKH, SKD, SUS, or SCM and is nitrided. Further, a ceramic coating film such as CrN or DLC is formed on the surface of the tip 110a of the vane 110 by a PVD processing method. Thereby, the surface of the tip 110a of the vane 110 has a hardness of about HV 1500 to 2000 and a surface roughness of about 0.2 ⁇ m of the tip Ra.
- the piston 109 is cast iron containing 0.7 to 1.0 wt% of chromium (Cr), 0.2 to 0.4 wt% of molybdenum (Mo), and 0.2 to 0.4 wt% of nickel (Ni). (Hereinafter referred to as “monichro cast iron”) and has a surface hardness of about HRC 47 to 55 by quenching, sub-zero, tempering, cooling, etc. The reason why the surface hardness is HRC 47 to 55 will be described later.
- the flat portion excluding the micro concave portions on the outer peripheral surface of the piston 109 has a surface roughness of about Ra 0.2 ⁇ m. It has been finished.
- the vane 110 used for the test is made of high-speed tool steel (SKH51), and a CrN ceramic coating film having a surface hardness of about HV1800, a film thickness of 5 ⁇ m, and a surface roughness Ra of 0.2 ⁇ m is formed on the tip 110a. Is formed.
- the piston 109 used in the test contains 0.7 to 1.0 wt% of chromium (Cr), 0.2 to 0.4 wt% of molybdenum (Mo), and 0.2 to 0.4 wt% of nickel (Ni). It is made from the cast iron black and has a surface roughness of about HRC50. HFO1234yf refrigerant was used for the test.
- a plurality of types of refrigerating machine oil 103 were prepared. Specifically, the refrigerating machine oil of Comparative Example 1 which is only a polyol ester, the refrigerating machine oil of Comparative Example 2 which is a polyol ester containing an acid scavenger, and an example which is a polyol ester containing an acid scavenger and an antiwear agent. 1 refrigerator oil was prepared. Further, three rotary compressors 120 were prepared for each of Comparative Example 1, Comparative Example 2, and Example 1. In each of Comparative Example 1, Comparative Example 2, and Example 1, 300 hours for the first rotary compressor 120, 1000 hours for the second rotary compressor 120, and a third rotary compressor An overload operation test was performed on 120 for 2000 hours. After the test, the wear amount of the piston 109 and the total acid value of the refrigerating machine oil 103 were measured for each rotary compressor 120.
- the total acid value is the number of milligrams (mg) of potassium hydroxide required to neutralize all acidic components contained in 1 g of the sample.
- the acid value is an index widely used for knowing the degree of oxidation during use of the lubricating oil or for evaluating the lubricating oil after an oxidation test and a practical test.
- the total acid value corresponds to the amount of hydrofluoric acid that is a decomposition product of the refrigerant and the amount of carboxylic acid that is the decomposition product of the refrigerating machine oil 103.
- the total acid value also corresponds to the amount of sludge generated by decomposition and polymerization of refrigerant and refrigerating machine oil.
- FIG. 4 (a) and FIG. 4 (b) show the characteristic correlation of operating time, piston wear amount, and total oil value of refrigeration oil for Example 1, Comparative Example 1, and Comparative Example 2, respectively.
- the horizontal axis indicates the operation time
- the vertical axis in FIG. 4 (a) indicates the amount of piston wear
- the vertical axis in FIG. 4 (b) indicates the total acid value.
- an acid scavenger was added to the polyol ester, that is, in the case of the refrigerating machine oil of Comparative Example 2, an increase in acid value was suppressed.
- the amount of wear in Comparative Example 2 was increased compared to Comparative Example 1 containing only the polyol ester. This is because when the oxidant is added to the polyol ester as in Comparative Example 2, the acid scavenger can suppress the increase in the acid value of the refrigerating machine oil, but at the same time, the formation of a fluorine-based reactant that is a decomposition product of the refrigerant This is presumed to be suppressed. It is presumed that the fluorine-based reactant adheres to the sliding portion of the compressor and has an effect of reducing wear of the sliding portion as a solid lubricant.
- Example 1 when an acid scavenger and an antiwear agent are added to the polyol ester, the acid scavenger suppresses the increase in the acid value of the refrigerating machine oil (prevents the deterioration of the refrigerating machine oil). In addition, it has been found that the wear amount of the sliding portion is reduced by the wear inhibitor.
- Example 2 Details of the pistons 109 of Example 2, Comparative Example 3, and Comparative Example 4 used in the test are shown in Table 1.
- the refrigerant used for the test is HFO1234yf refrigerant.
- the refrigerating machine oil 103 of only polyol ester was used.
- the same tendency is confirmed as a result of the test even when various additives are added to the refrigerating machine oil 103.
- the piston 109 of the second embodiment is the same as that described with reference to FIGS.
- the piston 1109 of Example 2 contains 0.7 to 1.0 wt% of chromium (Cr), 0.2 to 0.4 wt% of molybdenum (Mo), and 0.2 to 0.4 wt% of nickel (Ni). It is made from the cast iron black and has a surface hardness of about HRC50. Further, the outer peripheral surface of the piston 109 is finished so that the flat portion excluding the minute concave portion has a surface roughness of about Ra 0.2 ⁇ m.
- the material of the piston 109 of Comparative Example 3 is the same as that of Example 2, but unlike Example 2, it has a surface hardness of about HRC59. Further, the surface roughness is about Ra 0.2 ⁇ m.
- the material of the piston 109 of Comparative Example 4 is the same as that of Example 2 and has a surface hardness of about HRC41. Further, the surface roughness is about Ra 0.2 ⁇ m.
- FIG. 5 (a) and FIG. 5 (b) show the characteristic correlation of the operating time, the piston wear amount, and the total acid value of the refrigeration oil for Example 2, Comparative Example 3, and Comparative Example 4, respectively.
- the horizontal axis indicates the operation time
- the vertical axis in FIG. 5 (a) indicates the amount of piston wear
- the vertical axis in FIG. 5 (b) indicates the total acid value.
- Example 2 Comparative Example 3, and Comparative Example 4
- the progress of wear is initially fast, and the progress of wear tends to become slow as the operation time elapses.
- wear in a region where wear progresses rapidly is called initial wear
- wear in a region where the inclination is small is called steady wear.
- the initial wear is a period in which these microprotrusions disappear when the microprotrusions existing on the surface collide with each other, and is also called a familiar process.
- the conforming process is finished, the surface becomes smooth to some extent, the surface pressure is locally reduced, and the progress of wear is slowed down.
- the initial wear period of Comparative Example 4 having the lowest surface hardness of the piston 109 is relatively short, and the initial wear period of Comparative Example 3 having the highest surface hardness tends to be relatively long. Indicates.
- FIG. 5 (a) as a conventional example, an HFC-based refrigerant is used, and the same vane 110 and HRC 40 to 60 (the range that is mainly used when an HFC refrigerant is used) are provided.
- the upper limit value of the amount of piston wear after the compressor having the piston 109 is overloaded for 2000 hours is indicated by a dotted line.
- Example 2 and Comparative Example 3 have a wear amount substantially equal to that of the conventional example (when using an HFC refrigerant).
- the wear amount of the piston 109 of Comparative Example 4 having the lowest surface hardness is relatively large, and the wear amount of Example 2 and Comparative Example 3 having the highest surface hardness is substantially the same.
- FIG. 5 (b) as a conventional example, an HFC refrigerant is used, and the surface hardness of the same vane 110 and HRC 40-60 (mainly used when using an HFC refrigerant) is shown.
- the upper limit value of the total acid value of the refrigerating machine oil after overloading the compressor having the piston 109 provided for 2000 hours is indicated by a dotted line.
- Comparative Example 3 with the highest surface hardness of the piston 109 has the largest increase in total acid value, and the total acid value of Comparative Example 3 is larger than the total acid value of the conventional example (when using an HFC refrigerant). High value. Moreover, the comparative example 4 with the lowest surface hardness of the piston 109 also finally has a higher value than the conventional example. On the other hand, the total acid value of Example 2 is finally at the same level as the conventional example.
- the difference in the total acid value between Example 2 and Comparative Example 3 is considered to be due to the hardness of the piston 109.
- the local temperature rise of the sliding part is caused by the contact of microprotrusions existing on the sliding surfaces that slide with each other, and the degree of the temperature rise is the radius of the contact point of the microprotrusions. It is said to be inversely proportional to If the surface hardness of the piston 109 is too high with respect to the vane 110 coated with CrN ceramic, the surface of the piston 109 and the surface of the vane 110 are difficult to conform to each other, that is, the minute protrusions of the piston 109 are difficult to disappear. The radius of the contact point of the microprojection existing on the surface of the piston 109 is kept small.
- the region between the vane 110 and the piston 109 is maintained in a locally high temperature state.
- the initial wear period that is, the period until the microprojections disappear
- the period during which the increase rate of the total acid number is high substantially coincides with the period during which the increase rate of the total acid number is high. From this, during the initial wear period, decomposition of the HFO1234yf refrigerant having a carbon double bond, which is less stable than the conventionally used HFC refrigerant, occurred in the region between the vane 110 and the piston 109.
- the HFO1234yf refrigerant is decomposed to generate hydrogen fluoride (hydrofluoric acid), and the generated hydrogen fluoride contributes to the decomposition of the refrigerating machine oil 103 (generation of carboxylic acid and the like), thereby increasing the total acid value. It can be inferred that the change was reflected. Therefore, in order to suppress the increase in the total acid value, by making the difference in the surface hardness of the vane 110 and the piston 109 appropriate, in other words, by appropriately setting the upper limit value of the surface hardness of the piston 109. It is necessary to quickly end the initial wear, and thereby quickly shift to the steady wear in which the surface pressure is locally reduced.
- the total acid value of Comparative Example 4 with the lowest surface hardness of the piston 109 is similar to the total acid value of Comparative Example 3 with the highest hardness of the piston 109.
- the cause higher than the example can be inferred as follows.
- Comparative Example 4 the amount of piston wear is large. Since the exhausted powder discharged is very activated, it is considered that it becomes a catalyst and promotes the decomposition of the HFO1234yf refrigerant. Therefore, it can be inferred that the total acid value of Comparative Example 4 in which the most wear powder is generated is higher than that of the conventional example, that is, the case of using the HFC refrigerant. Therefore, it is necessary to ensure wear resistance by appropriately setting the difference in surface hardness between the vane 110 and the piston 109, in other words, the lower limit value of the surface hardness of the piston 109.
- FIG. 6 (a) and FIG. 6 (b) show the characteristic correlation between the piston wear amount and the total acid value of the refrigeration oil with respect to the piston surface hardness.
- the characteristic correlation shown in the figure was obtained by the following test.
- the vane 110 used for the test is made of high-speed tool steel (SKH51), and a CrN ceramic coating film having a surface hardness of about HV1800, a film thickness of 5 ⁇ m, and a surface roughness Ra of 0.2 ⁇ mRa is formed.
- the refrigerant used for the test is HFO1234yf refrigerant.
- the refrigerating machine oil 103 is a polyol ester.
- a plurality of rotary compressors 120 having pistons 109 having different surface hardness and having a surface roughness of Ra of about 0.2 ⁇ m and made of monichro cast iron were prepared. Each compressor was overloaded for 1000 hours. After the test, the wear amount of the piston 109 and the total acid value of the refrigerating machine oil 103 were measured for each rotary compressor 120.
- the horizontal axis indicates the hardness of the piston 109
- the vertical axis in FIG. 6 (a) indicates the amount of piston wear
- the vertical axis in FIG. 6 (b) indicates the total acid value.
- a refrigerant containing a hydrofluoroolefin having a carbon double bond is used, a polyol ester containing an acid scavenger and an antiwear agent is used as the refrigerating machine oil 103, and the vane 110 of the rotary compressor 120 is used.
- decomposition and polymerization of the refrigerant and the refrigerating machine oil 103 can be suppressed (that is, generation of sludge is suppressed).
- the wear resistance of the vane 110 and the piston 109 can be maintained. As a result, the reliability of the compressor 120 and the refrigeration cycle apparatus using the compressor 120 can be ensured.
- the GWP is preferably mixed so that the GWP is 5 or more and 750 or less, desirably 5 or more and 350 or less.
- HFO1234yf in order to mix HFO1234yf and HFC32 to make GWP350 or less, HFO1234yf needs to be 56 wt% or more.
- HFO1234yf in order to mix HFO1234yf and HFC125 to make GWP750 or less, HFO1234yf needs to be 78.7 wt% or more, and in order to make GWP350 or less, HFO1234yf needs to be 91.6 wt% or more.
- polyol ester oil compatible with HFO1234yf is used as the refrigerator oil 103
- polyvinyl ether or polyalkylene glycol having compatibility may also be used as the refrigerator oil 103.
- the compressor 120 can recover these refrigerating machine oils, so that a highly reliable compressor 120 can be obtained in the same manner as the polyol ester oil.
- these refrigerating machine oils are also compatible with the mixed refrigerant of HFO1234yf and HFC, the same effects as the polyol ester oil can be obtained.
- chromium (Cr) is 0.7 to 1.0 wt%
- molybdenum (Mo) is 0.2 to 0.4 wt%
- nickel (Ni) is 0.2 to 0.4 wt%. It is made from monichro cast iron containing 4 wt%.
- a similar effect can be obtained with a piston 109 made of monichrome cast iron containing 0.4 to 1.2 wt% chromium, 0.15 to 0.7 wt% molybdenum and 0.15 to 0.4 wt% nickel. can get. Further, the same effect can be obtained even when a piston 109 made of cast iron not containing nickel (mocro cast iron) is used.
- cast iron is used as a material for producing the piston 109 of the present embodiment, but other iron-based materials containing chrome, molybdenum, nickel (for example, carbon steel, tool steel, etc.) are used. May be used.
- the surface roughness (surface roughness of the ceramic coating film) of the tip 110a of the vane 110 of this embodiment and the surface roughness of the piston 109 are about Ra 0.2 ⁇ m.
- Ra surface roughness of the ceramic coating film
- the same effect can be obtained.
- the tip portion 110a of the vane 110 and the outer peripheral surface of the piston 109 become difficult to conform, and as a result, there is a possibility that the total acid value increases.
- this invention was demonstrated taking the example of the vane 110 and the piston 109, this invention is applicable also to the other sliding parts of the compressor 120, for example, the sliding part of a shaft and a bearing.
- the present invention is not limited to a rotary type compressor, and can be applied to a compressor such as a scroll compressor.
- a scroll compressor has a fixed side, a turning side scroll, etc. as a sliding part.
- the compressor according to the present invention and the refrigeration cycle apparatus using the compressor use a mixed refrigerant of a hydrofluoroolefin having a carbon double bond and a hydrofluorocarbon having no carbon double bond.
- the reliability of the compressor can be ensured. Therefore, the present invention can also be applied to a compressor for a hot water heater, a compressor for a car air conditioner, a compressor for a freezer refrigerator, a compressor for a dehumidifier, and the like.
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Abstract
Description
図1は、本発明の実施の形態に係る基本的な冷凍サイクル装置を示している。この冷凍サイクル装置は、図1に示すように、圧縮機120を有する。圧縮機120は、低温・低圧の冷媒ガスを圧縮し、高温・高圧の冷媒ガスを凝縮器121に向かって吐出する。凝縮器121に送られた冷媒ガスは、その熱を空気中に放出しながら高温・高圧の冷媒液となり、膨張機構(例えば、膨張弁、またはキャピラリチューブ)122に送られる。膨張機構122を通過する高温・高圧の冷媒液は、絞り効果によって低温・低圧の湿り蒸気となり蒸発器123へ送られる。蒸発器123に入った冷媒は、周囲から熱を吸収して蒸発する。そして、蒸発器123を出た低温・低圧の冷媒ガスは、ロータリ圧縮機120に吸い込まれる。このようなサイクルが繰り返される。
105 圧縮機構部
106 シリンダ
109 ピストン
110 ベーン
120 圧縮機
121 凝縮器
122 膨張機構
123 蒸発器
Claims (17)
- 冷凍サイクル装置に使用される圧縮機であって、
炭素の二重結合を有するハイドロフルオロオレフィンの単一冷媒または前記ハイドロフルオロオレフィンと炭素の二重結合を有しないハイドロフルオロカーボンとを含む混合冷媒が使用され、
冷凍機油の劣化を抑制する添加剤と磨耗防止剤とを含む前記冷凍機油が使用され、
前記混合冷媒および前記冷凍機油に曝される、HRC47~55の硬度を備える摺動部を有する、圧縮機。 - 前記摺動部として、互いに摺動し合うピストンとベーンとを有する、請求項1に記載の圧縮機。
- 前記ベーンが、鉄系材料から作製されて窒化処理されている、または焼結合金鋼から作製されて焼結処理と焼き入れ処理とがされている、請求項2に記載の圧縮機。
- 前記鉄系材料または前記焼結合金鋼が、高速度工具鋼である、請求項3記載の圧縮機。
- 前記ベーンが、セラミックコーティングされている、請求項3または4に記載の圧縮機。
- 前記セラミックコーティングにより、Ti(チタン)、V(バナジウム)、Ta(タンタル)、W(タングステン)、Nb(ニオブ)の窒化物または炭化物が前記ベーンの表面にコーティングされる、請求項5に記載の圧縮機。
- 前記ピストンと接触する前記ベーンの先端部の前記セラミックコーティング厚さが5~15μmである、請求項5または6に記載の圧縮機。
- 前記セラミックコーティングが、前記ベーンの先端部のみに行われている、請求項5~7のいずれか1項に記載の圧縮機。
- 前記ベーンが、セラミック材料から作製されている、請求項2に記載の圧縮機。
- 前記ピストンが、鋳鉄から作製されている、請求項2~9のいずれか1項に記載の圧縮機。
- 前記鋳鉄が、クロムを0.4~1.2wt%、モリブデンを0.15~0.7wt%含有する、請求項10に記載の圧縮機。
- 前記鋳鉄が、ニッケルを0.15~0.4wt%含有する、請求項10または11に記載の圧縮機。
- 前記ベーンの表面および前記ピストンの表面が、Ra0.4μm以下の面粗さを備える、請求項2~12のいずれか1項に記載の圧縮機。
- 前記冷媒が、ハイドロフルオロオレフィンの一種であるテトラフルオロプロペンまたはトリフルオロプロペンの少なくとも1つを含み、地球温暖化係数が5以上750以下、望ましくは5以上350以下である、請求項1~13のいずれか1項に記載の圧縮機。
- 前記冷媒が、ハイドロフルオロオレフィンの一種であるテトラフルオロプロペンまたはトリフルオロプロペンを主成分とし、
ジフルオロメタンおよびペンタフルオロエタンが、地球温暖化係数が5以上、750以下となるように、望ましくは5以上350以下となるように前記冷媒に混合されている、請求項1~13のいずれか1項に記載の圧縮機。 - 前記冷凍機油が、(1)ポリオキシアルキレングリコール類、(2)ポリビニルエーテル類、(3)ポリ(オキシ)アルキレングリコールまたはそのモノエーテルとポリビニルエーテルの共重合体、(4)ポリオールエステル類およびポリカーボネート類の含酸素化合物を含む合成油、(5)アルキルベンゼン類を主成分とする合成油、または(6)αオレフィン類を主成分とする合成油である、請求項1~15のいずれか1項に記載の圧縮機。
- 請求項1~16のいずれか一項に記載の圧縮機と、
凝縮器と、
膨張機構と、
蒸発器とを有し、
冷媒を圧縮、凝縮、膨張、蒸発させる冷凍サイクルを形成する、冷凍サイクル装置。
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US13/821,152 US20130167580A1 (en) | 2010-09-07 | 2011-09-06 | Compressor and refrigerating cycle apparatus using the same |
CN2011800431172A CN103097733A (zh) | 2010-09-07 | 2011-09-06 | 压缩机和使用该压缩机的制冷循环装置 |
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WO2014156679A1 (ja) * | 2013-03-29 | 2014-10-02 | 三菱重工業株式会社 | 多気筒ロータリ圧縮機 |
JP2014196714A (ja) * | 2013-03-29 | 2014-10-16 | 三菱重工業株式会社 | 多気筒ロータリ圧縮機 |
CN105008722A (zh) * | 2013-03-29 | 2015-10-28 | 三菱重工业株式会社 | 多气缸旋转压缩机 |
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US10865782B2 (en) | 2015-09-07 | 2020-12-15 | Panasonic Intellectual Property Management Co., Ltd. | Refrigerant compressor and refrigeration device including refrigerant compressor |
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JP2020180618A (ja) * | 2020-07-21 | 2020-11-05 | 東芝キヤリア株式会社 | 密閉型圧縮機および冷凍サイクル装置 |
Also Published As
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US20130167580A1 (en) | 2013-07-04 |
JPWO2012032765A1 (ja) | 2014-01-20 |
JP6011861B2 (ja) | 2016-10-19 |
CN103097733A (zh) | 2013-05-08 |
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