WO2018199204A1 - Compresseur frigorifique hermétiquement scellé et dispositif frigorifique utilisant ledit compresseur - Google Patents

Compresseur frigorifique hermétiquement scellé et dispositif frigorifique utilisant ledit compresseur Download PDF

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Publication number
WO2018199204A1
WO2018199204A1 PCT/JP2018/016908 JP2018016908W WO2018199204A1 WO 2018199204 A1 WO2018199204 A1 WO 2018199204A1 JP 2018016908 W JP2018016908 W JP 2018016908W WO 2018199204 A1 WO2018199204 A1 WO 2018199204A1
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WIPO (PCT)
Prior art keywords
oil
lubricating oil
refrigerant compressor
range
synthetic
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.)
Ceased
Application number
PCT/JP2018/016908
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English (en)
Japanese (ja)
Inventor
信吾 大八木
川端　淳太
寛人 林
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.)
Panasonic Intellectual Property Management Co Ltd
Panasonic Appliances Refrigeration Devices Singapore Pte Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Panasonic Appliances Refrigeration Devices Singapore Pte Ltd
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Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd, Panasonic Appliances Refrigeration Devices Singapore Pte Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to JP2019514597A priority Critical patent/JPWO2018199204A1/ja
Priority to US16/609,023 priority patent/US20200141616A1/en
Priority to CN201880028242.8A priority patent/CN110573734A/zh
Priority to EP18791980.8A priority patent/EP3617504A4/fr
Publication of WO2018199204A1 publication Critical patent/WO2018199204A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • 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
    • C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • C10M101/02—Petroleum fractions
    • 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
    • C10M105/02—Well-defined hydrocarbons
    • C10M105/06—Well-defined hydrocarbons aromatic
    • 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
    • C10M105/18—Ethers, e.g. epoxides
    • 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
    • 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
    • C10M107/30—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M107/32—Condensation polymers of aldehydes or ketones; Polyesters; Polyethers
    • C10M107/34—Polyoxyalkylenes
    • 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
    • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
    • C10M111/02—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a non-macromolecular organic compound
    • 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
    • F04B39/02—Lubrication
    • F04B39/0215—Lubrication characterised by the use of a special lubricant
    • 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
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/023—Hermetic compressors
    • 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
    • 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
    • C10M2290/00—Mixtures of base materials or thickeners or additives
    • C10M2290/04—Synthetic base oils
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/30—Refrigerators lubricants or compressors lubricants

Definitions

  • the present invention relates to a hermetic refrigerant compressor having good productivity using a lower viscosity lubricating oil, and a refrigeration apparatus using the hermetic refrigerant compressor.
  • Patent Documents 1 and 2 disclose a specific composition containing an ester as a lubricating oil composition for a refrigerator having low viscosity, good lubricity, and excellent long-term stability in a low temperature region. Has been. Each of these lubricating oil compositions has a kinematic viscosity at 40 ° C. in the range of 6 to 28 mm 2 / s.
  • Patent Document 3 in order to prevent wear or seizure on a sliding member by using a low-viscosity lubricating oil, the piston and the connecting rod constituting the sliding portion are iron-based sintered.
  • a structure is disclosed in which a steam layer is cut and removed from the piston surface after nitriding treatment is performed on the connecting rod after the steam treatment is performed with the material.
  • Patent Document 3 describes that the lubricating oil preferably has a kinematic viscosity at 40 ° C. in the range of 3 to 10 mm 2 / s.
  • the kinematic viscosity of the lubricating oil is less than 3 mm 2 / s, the viscosity when the refrigerant is dissolved becomes low, the oil film is not sufficiently retained, and the lubricity becomes poor. It is described that sealability cannot be maintained.
  • Patent Document 4 discloses a configuration in which a predetermined amount of a specific phosphorus compound is added to a lubricating base oil in order to improve the wear resistance of the refrigerating machine oil.
  • Patent Document 4 describes that the lubricating base oil preferably has a kinematic viscosity at 40 ° C. in the range of 3 to 300 mm 2 / s.
  • the viscosity of the lubricating oil when the viscosity of the lubricating oil is lowered, the volatility is increased, so that the flash point is lowered as the viscosity is lowered. If the flash point of the lubricating oil decreases, stricter attention to the fire is required when handling the lubricating oil.
  • the low distillation component contained in the lubricating oil may evaporate first and increase the viscosity, so that special storage conditions are required.
  • lowering the viscosity of the lubricating oil decreases the handling property of the lubricating oil, and as a result, the productivity of the refrigerant compressor also decreases.
  • the present invention has been made to solve such problems, and includes a hermetic refrigerant compressor capable of realizing good productivity even when a lower viscosity lubricating oil is used, and the same.
  • An object is to provide a refrigeration apparatus.
  • a hermetic refrigerant compressor includes a compression element that is housed in a hermetic container and compresses the refrigerant, and an electric element that drives the compression element.
  • lubricating oil is stored in the lubricating oil, along with a mixed oil composed of at least mineral and synthetic oils, ranging kinematic viscosity of 0.1mm 2 /s ⁇ 5.1mm 2 / s at 40 ° C. And the flash point is 110 ° C. or higher.
  • the kinematic viscosity falls within the above range when blending mineral oil and synthetic oil. And it adjusts so that the minimum of flash point may become the said value.
  • the fall of the handleability of lubricating oil can be suppressed effectively. Therefore, by using such a lubricating oil, not only can the hermetic refrigerant compressor be made highly efficient, but also a good productivity can be realized even if a lower viscosity lubricating oil is used.
  • the present invention also includes a refrigeration apparatus including the hermetic refrigerant compressor having the above-described configuration. Thereby, it is possible to provide a refrigeration apparatus having good performance and excellent productivity.
  • a hermetic refrigerant compressor includes a compression element that is housed in a hermetic container and compresses the refrigerant, and an electric element that drives the compression element, and lubricating oil is stored in the hermetic container, the lubricating oil, along with a mixed oil composed of at least mineral and synthetic oils, is in the range kinematic viscosity of 0.1mm 2 /s ⁇ 5.1mm 2 / s at 40 ° C., and a flash point Is a structure which is 110 degreeC or more.
  • the kinematic viscosity falls within the above range when blending mineral oil and synthetic oil. And it adjusts so that the minimum of flash point may become the said value.
  • the fall of the handleability of lubricating oil can be suppressed effectively. Therefore, by using such a lubricating oil, not only can the hermetic refrigerant compressor be made highly efficient, but also a good productivity can be realized even if a lower viscosity lubricating oil is used.
  • the content of the synthetic oil in the lubricating oil may be within a range of 0.1 to 40.0% by weight of the total amount of the lubricating oil.
  • the kinematic viscosity and the lower limit of the flash point of the lubricating oil can be easily adjusted to the above numerical range.
  • the synthetic oil may be at least one selected from the group consisting of ester oil, ether oil, polyalkylene glycol oil, and alkylbenzene oil. Also good.
  • the synthetic oil is at least one selected from the above group, and by mixing with the mineral oil, the lower limit of the kinematic viscosity and the flash point of the lubricating oil can be easily within the above numerical range. It becomes possible to adjust.
  • the hermetic refrigerant compressor having the above-described configuration has a configuration in which at least one of an extreme pressure additive, an oily agent, an antifoaming agent, and a stabilizer is further added to the lubricating oil. May be.
  • the properties of the lubricating oil can be improved and the reliability of the hermetic refrigerant compressor can be improved.
  • the content of the additive may be in the range of 0.1 to 4.0% by weight of the total amount of the lubricating oil.
  • the property of the lubricating oil can be improved with an appropriate amount of the additive by adjusting the content of the additive added to the lubricating oil within the above range.
  • the reliability of the compressor can be improved.
  • the lubricating oil may have a distillation characteristic in which a distillation range is 200 to 400 ° C.
  • the distillation characteristics of the lubricating oil have the above-described distillation range, the tendency to lower the flash point of the lubricating oil can be more effectively suppressed, and the stability of the lubricating oil is also good. Therefore, the handling property of the lubricating oil can be further improved.
  • the refrigeration apparatus is configured to include the hermetic refrigerant compressor having any one of the configurations described above. Therefore, since the refrigeration apparatus is provided with the hermetic refrigerant compressor having high efficiency and good productivity, it is possible to provide a refrigeration apparatus having good performance and excellent productivity.
  • FIG. 1 is a schematic cross-sectional view of a refrigerant compressor 100 according to the first embodiment.
  • the hermetic container 101 is filled with the refrigerant gas 102, and the lubricating oil 103 is stored at the bottom.
  • a hydrocarbon-based refrigerant is used as the refrigerant gas 102
  • a mixed oil composed of at least mineral oil and synthetic oil is used as described later.
  • an electric element 106 including a stator 104 and a rotor 105 and a reciprocating compression element 107 driven by the electric element 106 are accommodated.
  • the compression element 107 includes a crankshaft 108, a cylinder block 112, a piston 115, and the like. The configuration of the compression element 107 will be described below.
  • the crankshaft 108 includes at least a main shaft portion 109 in which the rotor 105 is press-fitted and an eccentric shaft 110 formed eccentrically with respect to the main shaft portion 109.
  • An oil supply pump 111 communicating with the lubricating oil 103 is provided at the lower end of the crankshaft 108.
  • the cylinder block 112 is made of cast iron, forms a substantially cylindrical bore 113, and includes a bearing 114 that pivotally supports the main shaft 109.
  • a flange surface 116 is formed on the rotor 105, and the upper end surface of the bearing portion 114 is a thrust surface 117.
  • a thrust washer 118 is inserted between the flange surface 116 and the thrust surface 117 of the bearing portion 114.
  • a thrust bearing 119 is configured by the flange surface 116, the thrust surface 117 and the thrust washer 118.
  • the piston 115 is loosely fitted to the bore 113 while maintaining a certain amount of clearance, is made of an iron-based material, and forms a compression chamber 120 together with the bore 113. Further, the piston 115 is connected to the eccentric shaft 110 through a piston pin 121 by a connecting rod 122 which is a connecting means. The end surface of the bore 113 is sealed with a valve plate 123.
  • the head 124 forms a high pressure chamber.
  • the head 124 is fixed to the opposite side of the bore 113 of the valve plate 123.
  • the suction tube (not shown) is fixed to the sealed container 101 and connected to the low pressure side (not shown) of the refrigeration cycle, and guides the refrigerant gas 102 into the sealed container 101.
  • the suction muffler 125 is sandwiched between the valve plate 123 and the head 124.
  • a cluster 127 is connected to the stator 104 constituting the electric element 106 via a lead wire 126. Further, the sealed container 101 is provided with a terminal 128 that penetrates the inside and outside of the sealed container 101. A cluster 127 is connected to the terminal 128. Thereby, electric power is supplied to the electric element 106 from a commercial power source (not shown).
  • the type of the refrigerant gas 102 used in the refrigerant compressor 100 according to the present disclosure is not particularly limited, but the hydrocarbon refrigerant described above is preferably used.
  • Specific examples of the hydrocarbon refrigerant include, but are not particularly limited to, R290 (propane), R600a (isobutane), R600 (butane), R1270 (propylene), and the like.
  • Typical hydrocarbon refrigerants include R600a or R290.
  • the lubricating oil 103 having a low viscosity and a high flash point is used.
  • the lubricating oil 103 is a mixed oil of mineral oil and synthetic oil. is there.
  • the refrigerant gas 102 is used in a refrigerant circuit (refrigeration cycle, see Embodiment 2) including the refrigerant compressor 100, and the refrigerant gas 102 and the lubricating oil 103 exist in a state where they can be contacted and mixed in the sealed container 101. . Therefore, the refrigerant gas 102 and the lubricating oil 103 can be regarded as constituting a working medium for the refrigeration cycle.
  • the working medium for the refrigeration cycle may contain other components in addition to the refrigerant component and the lubricating oil component.
  • the resin member is included in the configuration housed in the sealed container 101.
  • the resin member is not particularly limited as long as it is a member composed of at least a resin, that is, a polymer.
  • Representative examples include a suction muffler 125, an insulating member attached to the electric element 106, a cluster 127, and the like.
  • These resin members may be composed only of a resin (polymer), but may be, for example, a composite material including a different material such as a fiber material or a filler in addition to the resin.
  • a resin polymer
  • the cluster 127 a member formed of a polyester resin containing glass fiber can be used.
  • the suction muffler 125 can include a member formed of a polyester resin containing glass fiber.
  • the resin (polymer) constituting the resin member is not particularly limited. Specifically, for example, polyester resins such as polyethylene terephthalate (PET) or polybutylene terephthalate (PBT), polyamide (PA), polyphenylene sulfide ( PPS), liquid crystal polymer (or liquid crystal polyester, LCP) and the like. Since these resins are excellent in heat resistance, refrigerant resistance, oil resistance and the like, they are preferably used as a material for a resin member accommodated in the sealed container 101.
  • the resin material constituting the resin member may be one type of resin, but a polymer alloy (polymer blend) in which two or more types are appropriately combined may be used. Further, the resin constituting the resin member may contain a known additive.
  • the dissimilar material contained in the resin member includes a fiber material or a filler.
  • the fiber material include, but are not limited to, aramid fiber, nylon fiber, polyester fiber, glass fiber, and carbon fiber. These fiber materials may be used alone or in combination of two or more.
  • the filler may be in the form of particles or powder, but may be in the form of short fibers. Sometimes the fiber material is considered a filler. Specific examples of the filler include inorganic fillers such as silica, silicates, clays, gypsum, alumina, titanium dioxide, talc, and carbon black, but are not particularly limited.
  • the piston 115 reciprocates in the bore 113, sucks the refrigerant gas 102 introduced into the sealed container 101 through a suction tube (not shown) from the suction muffler 125, and compresses it in the compression chamber 120.
  • the lubricating oil 103 is supplied to each sliding portion from the oil supply pump 111, lubricates the sliding portion, and controls the seal between the piston 115 and the bore 113.
  • the lubricating oil 103 used in the refrigerant compressor 100 is a mixed oil composed of at least mineral oil and synthetic oil as described above.
  • the lubricating oil 103 (mixed oil) is a kinematic viscosity at 40 ° C. in the range of 0.1mm 2 /s ⁇ 5.1mm 2 / s, a relatively lower viscosity than the prior art.
  • the lubricating oil 103 has a flash point of 110 ° C. or higher.
  • the lubricating oil 103 according to the present disclosure has mineral oil as a main component and synthetic oil as a subcomponent, and may contain components other than these. Therefore, the lubricating oil 103 according to the present disclosure is a lubricating oil composition containing mineral oil and synthetic oil.
  • the content (content rate) of the mineral oil contained in the lubricating oil 103 is not particularly limited as long as it can be determined as the “main component” when viewed as the entire lubricating oil 103 (lubricating oil composition).
  • the content (content rate) of the synthetic oil contained in the lubricating oil 103 is not particularly limited, and “subcomponent” having a smaller content than the mineral oil when viewed as the entire lubricating oil 103 (lubricating oil composition). It is sufficient that the content becomes.
  • the content of the synthetic oil as a subsidiary component may be within the range of 0.1 to 40.0% by weight, for example, 1 to 35% by weight. % Can be cited as a preferred example, and a range of 5 to 25% by weight can be cited as a more preferred example.
  • the content of the mineral oil which is a main component in the lubricating oil 103 should just be larger than synthetic oil. For example, if the content of the synthetic oil is 40.0% by weight or less of the total amount of the lubricating oil 103 as described above, the content of the mineral oil only needs to exceed 40.0% by weight of the total amount of the lubricating oil 103. For example, it may be 50% by weight or more.
  • the synthetic oil is blended (blended) with the mineral oil so that the lubricating oil 103 is not simply reduced in viscosity but the flash point of the lubricating oil 103 is not lowered. Therefore, by setting the content of the synthetic oil within the above range, the lower limit of the kinematic viscosity and the flash point of the lubricating oil 103 can be easily adjusted to the above-described numerical range.
  • the types of mineral oil and synthetic oil constituting the lubricating oil 103 are not particularly limited.
  • the mineral oil includes paraffinic mineral oil and naphthenic mineral oil. In the present disclosure, any of these mineral oils may be used, or these may be used in combination. Further, a plurality of types of paraffinic mineral oils having different physical properties may be used in combination, and similarly, a plurality of types of naphthenic mineral oils having different physical properties may be used in combination, or different combinations of different paraffinic mineral oils may be used. You may mix and use the combination of system mineral oil.
  • synthetic oil examples include, but are not limited to, polyalphaolefin oil, alkylbenzene oil, ester oil, ether oil, polyalkylene glycol oil, fluorine-based synthetic oil, and silicon-based synthetic oil. Only one kind of these synthetic oils may be selected and blended with mineral oil, or a plurality of kinds may be blended with mineral oil.
  • ester oil it is particularly preferable to use at least one selected from the group consisting of ester oil, ether oil, polyalkylene glycol oil, and alkylbenzene oil.
  • ester oil By blending at least one of these synthetic oils into mineral oil, it becomes possible to easily adjust the lower limit of the kinematic viscosity and flash point of the lubricating oil 103 to the above numerical range.
  • characteristics other than the lower limits of the kinematic viscosity and the flash point described above to the lubricating oil 103.
  • polarity can be imparted to the lubricating oil 103 by selecting ester oil having polarity as a synthetic oil and blending it with mineral oil.
  • the kinematic viscosity at 40 ° C. of the lubricating oil 103 is not particularly limited as long as the range of the, for example, it is mentioned within the scope of 0.1mm 2 /s ⁇ 4.5mm 2 / s A preferred example A range of 0.1 mm 2 / s or more and less than 3.0 mm 2 / s can be given as a more preferable example.
  • the kinematic viscosity in the present disclosure is measured based on JIS K2283.
  • the lubricating oil 103 When the kinematic viscosity at 40 ° C. of the lubricating oil 103 exceeds 5.1 mm 2 / s, the lubricating oil 103 is not further reduced in viscosity, so that the effect of increasing the efficiency by reducing the viscosity cannot be sufficiently obtained. . On the other hand, if the kinematic viscosity at 40 ° C. is less than 0.1 mm 2 / s, the lubricating effect as the lubricating oil 103 may not be sufficiently obtained.
  • the lower limit of the flash point of the lubricating oil 103 is not particularly limited as long as it is 110 ° C. or higher.
  • 120 ° C. or higher can be cited as a preferred example, and 150 ° C. or higher is a more preferred example.
  • the flash point in this indication is measured based on JIS K2265. If the lower limit of the flash point of the lubricating oil 103 is less than 110 ° C., stricter attention to fire is required when handling the lubricating oil 103, and the viscosity may increase over time unless special storage conditions are met. There is. Therefore, the handleability of the lubricating oil 103 is reduced.
  • the low distillation component contained in the lubricating oil 103 increases. Therefore, when stored under normal conditions, the low-distilled component contained in the lubricating oil 103 may evaporate first and the viscosity may increase over time.
  • the general lubricating oil 103 is stored under conditions of low vacuum and high temperature, for example, in a 10 ⁇ 2 Pa atmosphere and a temperature range of 40 to 60 ° C. If the flash point of the lubricating oil 103 is low, such a low vacuum is stored. Under high temperature conditions, the low distillation component evaporates and the viscosity increases with time. Therefore, special storage conditions using chemical filters are required.
  • the lubricating oil 103 satisfy not only the kinematic viscosity range at 40 ° C. and the lower limit of the flash point, but also the predetermined distillation characteristics.
  • the lubricating oil 103 according to the present disclosure preferably has a distillation characteristic with a distillation range of 200 to 400 ° C. (that is, a distillation characteristic with an initial boiling point of 200 ° C. and an end point of 400 ° C.).
  • the distillation characteristic in this indication is measured based on JIS K2254.
  • Mineral oil is basically a mixture of many kinds of oily substances, so it has a wide range of distillation characteristics, but synthetic oil is basically composed of a single kind (or several kinds) of synthesized compounds.
  • the distillation characteristics are specified at one point (or several points). Therefore, by blending the synthetic oil with the mineral oil, it becomes possible to adjust the distillation characteristics of the lubricating oil 103, which is a mixed oil, within the distillation range. In addition, you may refine
  • the lubricating oil 103 satisfies the above-described conditions of distillation characteristics in addition to the basic conditions of the kinematic viscosity range at 40 ° C. and the lower limit value of the flash point, the low-distillation contained in the lubricating oil 103 is included. Ingredients can be reduced. Therefore, the tendency of the flash point of the lubricating oil 103 to decrease can be more effectively suppressed, and the stability of the lubricating oil 103 can be improved. As a result, the handling property of the lubricating oil 103 can be further improved.
  • the lubricating oil 103 is a lubricating oil composition composed of mineral oil and synthetic oil, and may include components other than mineral oil and synthetic oil. Specific examples of other components include various additives known in the field of the lubricating oil 103.
  • Specific additives are not particularly limited, and examples thereof include at least one of an extreme pressure additive, an oily agent, an antifoaming agent, and a stabilizer. By adding these additives to the mixed oil of mineral oil and synthetic oil, the properties of the lubricating oil 103 can be improved and the reliability of the refrigerant compressor 100 can be improved.
  • the addition amount (content) of these additives is not particularly limited.
  • any additive may be added within the range of 0.1 to 4.0% by weight of the total amount of the lubricating oil 103. Good. If the content of the additive is less than 0.1% by weight of the total amount of the lubricating oil 103, although depending on the type of the additive, the amount of the additive is too small and the effect of the additive may not be sufficiently obtained. On the other hand, when the content of the additive exceeds 4.0% by weight of the total amount of the lubricating oil 103, depending on the type of the additive, not only the effect of the additive corresponding to the added amount can be obtained. If the additive content is excessive, other physical properties of the lubricating oil 103 may be affected.
  • stabilizers may be mentioned as typical additives.
  • the stabilizer may include an acid scavenger or fullerene.
  • the acid scavenger is used for suppressing an increase in acid value due to deterioration of the base oil (mixed oil composed of mineral oil and synthetic oil) due to water or oxygen.
  • the base oil mixed oil composed of mineral oil and synthetic oil
  • fullerene has an action of suppressing a decrease in flash point of the lubricating oil 103 and therefore can be used as a “flash point decrease inhibitor”. Therefore, the flash point in the lubricating oil 103 can be more effectively suppressed by adding fullerene.
  • the addition amount of the acid scavenger and / or fullerene, which is a stabilizer may be within the range of 0.1 to 4.0% by weight of the total amount of the lubricating oil 103.
  • the added amount (content) of these stabilizers within the above range, the properties of the lubricating oil 103 can be improved with an appropriate amount of the stabilizer, so that the reliability of the refrigerant compressor 100 is further improved. can do.
  • the electric element 106, the compression element 107, and the like are accommodated in the sealed container 101 and the lubricating oil 103 is stored.
  • the lubricating oil 103 includes at least mineral oil and synthetic oil. in a constructed mixed oil is in a range kinematic viscosity of 0.1mm 2 /s ⁇ 5.1mm 2 / s at its 40 ° C., and is flash point 110 ° C. or higher.
  • Such a lubricating oil 103 has a kinematic viscosity that falls within the above range when the mineral oil and the synthetic oil are blended with the base oil mixed with the synthetic oil as well as the mineral oil, and the flash point. It adjusts so that the lower limit of may become the said value. Thereby, since the lubricating oil 103 with a low viscosity and a high flash point can be obtained, it is possible to effectively suppress a decrease in the handleability of the lubricating oil 103. Therefore, not only can the refrigerant compressor 100 be made highly efficient by using such a lubricating oil 103, but also good productivity can be realized even if a lower viscosity lubricating oil 103 is used.
  • the refrigerant compressor 100 has a configuration in which the electric element 106 is disposed above the compression element 107.
  • the electric element 106 is compressed. It goes without saying that it may have a configuration arranged below the element 107.
  • a refrigerant compressor to which the present disclosure can be applied can obtain the same operational effects as those described in the first embodiment as long as the above-described lubricating oil 103 can be used.
  • the refrigerant compressor 100 is a reciprocating type (reciprocating type) as described above, but the refrigerant compressor according to the present disclosure is not limited to a reciprocating type, and is a rotary type, a scroll type. Needless to say, other known configurations such as a vibration type may be used.
  • a refrigerant compressor to which the present disclosure can be applied can obtain the same operational effects as those described in the first embodiment as long as the above-described lubricating oil 103 can be used.
  • the refrigerant compressor 100 is driven by a commercial power supply.
  • the refrigerant compressor according to the present disclosure is not limited to this, for example, is driven by an inverter at a plurality of operating frequencies. It may be done. Even if the refrigerant compressor has such a configuration, good lubricity can be realized by using the lubricating oil 103 described above. Therefore, the reliability of the refrigerant compressor can be improved even during low-speed operation where the amount of oil supplied to each sliding portion is reduced, or during high-speed operation where the rotational speed of the electric element increases.
  • FIG. 2 schematically shows a schematic configuration of a refrigeration apparatus 200 including the refrigerant compressor 100 according to the first embodiment. Therefore, in Embodiment 2, only the outline of the basic configuration of the refrigeration apparatus 200 will be described, but it goes without saying that the specific configuration of the refrigeration apparatus 200 is not limited to this.
  • the refrigeration apparatus 200 includes a main body 206, a partition wall 209, a refrigerant circuit 201 (refrigeration cycle), and the like.
  • the main body 206 is composed of a heat insulating box, a door, and the like.
  • the box has a structure in which one surface is opened, and the door is configured to open and close the opening of the box.
  • the inside of the main body 206 is partitioned into an article storage space 207 and a machine room 208 by a partition wall 209.
  • a blower (not shown) is provided in the storage space 207.
  • the inside of the main body 206 may be partitioned into a space other than the storage space 207 and the machine room 208.
  • the refrigerant circuit 201 (refrigeration cycle) is configured to cool the interior of the storage space 207.
  • the heat absorber 204 is disposed in the storage space 207.
  • the cooling heat of the heat absorber 204 is agitated so as to circulate in the storage space 207 by a blower (not shown), as indicated by the dashed arrow in FIG. Thereby, the inside of the storage space 207 is cooled.
  • the refrigeration apparatus 200 according to the second embodiment includes the refrigerant circuit 201 including the refrigerant compressor 100 according to the first embodiment.
  • the refrigerant compressor 100 uses the lubricating oil 103 having a low viscosity and a high flash point, so that the efficiency is improved. Therefore, since the refrigeration apparatus 200 according to Embodiment 2 can reduce power consumption, energy saving can be realized and reliability can be improved.
  • the refrigeration apparatus 200 described in the second embodiment is an example of a refrigeration apparatus according to the present disclosure (a refrigeration apparatus including the refrigerant compressor according to the present disclosure), and the present disclosure is not limited to the refrigeration apparatus 200. Needless to say.
  • Examples of the refrigeration apparatus according to the present disclosure include a refrigerator (for home use and business use), a dehumidifier, a showcase, an ice maker, a heat pump type hot water heater, a heat pump type washing and drying machine, a vending machine, an air conditioner, and the like. Can do.
  • the present invention can be widely and suitably used in the fields of a refrigerant compressor using a low-viscosity lubricating oil and a refrigeration apparatus using such a refrigerant compressor.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Lubricants (AREA)
  • Compressor (AREA)

Abstract

La présente invention porte sur un compresseur frigorifique hermétiquement scellé (100), comprenant un élément de compression (107) qui est logé à l'intérieur d'un récipient hermétiquement scellé (101) et qui permet de comprimer un fluide frigorigène; et un élément électrique (106) qui entraîne l'élément de compression (107). Une huile lubrifiante (103) est stockée à l'intérieur du récipient hermétiquement scellé (101). L'huile lubrifiante (103) est une huile mélangée constituée d'au moins une huile minérale et d'une huile synthétique. L'huile lubrifiante (103) présente une viscosité cinématique à 40 °C dans une plage de 0,1 mm2/s à 5,1 mm2/s et un point d'éclair de 110 °C ou plus.
PCT/JP2018/016908 2017-04-28 2018-04-26 Compresseur frigorifique hermétiquement scellé et dispositif frigorifique utilisant ledit compresseur Ceased WO2018199204A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2019514597A JPWO2018199204A1 (ja) 2017-04-28 2018-04-26 密閉型冷媒圧縮機およびこれを用いた冷凍装置
US16/609,023 US20200141616A1 (en) 2017-04-28 2018-04-26 Sealed refrigerant compressor and refrigeration device including same
CN201880028242.8A CN110573734A (zh) 2017-04-28 2018-04-26 密封制冷压缩机以及包括该密封制冷压缩机的制冷设备
EP18791980.8A EP3617504A4 (fr) 2017-04-28 2018-04-26 Compresseur frigorifique hermétiquement scellé et dispositif frigorifique utilisant ledit compresseur

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JP2017-089973 2017-04-28
JP2017089973 2017-04-28

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WO (1) WO2018199204A1 (fr)

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EP3617504A1 (fr) 2020-03-04
US20200141616A1 (en) 2020-05-07
CN110573734A (zh) 2019-12-13
EP3617504A4 (fr) 2020-04-22
JP2021080926A (ja) 2021-05-27

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