WO2018199206A1 - Hermetically sealed refrigerant compressor and refrigeration device using same - Google Patents

Hermetically sealed refrigerant compressor and refrigeration device using same Download PDF

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Publication number
WO2018199206A1
WO2018199206A1 PCT/JP2018/016910 JP2018016910W WO2018199206A1 WO 2018199206 A1 WO2018199206 A1 WO 2018199206A1 JP 2018016910 W JP2018016910 W JP 2018016910W WO 2018199206 A1 WO2018199206 A1 WO 2018199206A1
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WO
WIPO (PCT)
Prior art keywords
lubricating oil
resin member
refrigerant compressor
oil
range
Prior art date
Application number
PCT/JP2018/016910
Other languages
French (fr)
Japanese (ja)
Inventor
信吾 大八木
川端　淳太
寛人 林
Original Assignee
パナソニック アプライアンシズ リフリジレーション デヴァイシズ シンガポール
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニック アプライアンシズ リフリジレーション デヴァイシズ シンガポール, パナソニックＩｐマネジメント株式会社 filed Critical パナソニック アプライアンシズ リフリジレーション デヴァイシズ シンガポール
Priority to EP18790900.7A priority Critical patent/EP3617503A1/en
Priority to CN201880028216.5A priority patent/CN110573733A/en
Priority to US16/609,072 priority patent/US20200149520A1/en
Priority to JP2019514599A priority patent/JPWO2018199206A1/en
Publication of WO2018199206A1 publication Critical patent/WO2018199206A1/en

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Classifications

    • 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
    • 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
    • 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
    • F04B39/0238—Hermetic compressors with oil distribution channels
    • 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
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/02—Viscosity; Viscosity index
    • 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
    • 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
    • F04B39/0005—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 adaptations of pistons
    • 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
    • F04B39/0094—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 crankshaft
    • 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
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/02—Compression machines, plants or systems with non-reversible cycle with compressor of reciprocating-piston type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/13—Vibrations

Definitions

  • the present invention relates to a hermetic refrigerant compressor having good reliability using a low-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.
  • a resin member (resin member) is included in the internal structure housed in the hermetic container.
  • the resin constituting the resin member that is, the polymer material contains not only a polymer component but also a low molecular component such as an oligomer. It is known that when a lubricant having a lower viscosity is used, low-molecular components such as oligomers contained in the resin member are extracted by the lubricant and the reliability of the refrigerant compressor is reduced.
  • the oligomer extracted by the lubricating oil adheres to, for example, the suction lead, and when this is carbonized at a high temperature, there is a possibility that oil sludge is deposited on the suction lead. As a result, the sealing performance of the suction lead may be reduced. Further, when the oligomer extracted by the lubricating oil is sent to the high pressure side of the refrigeration cycle, there is a possibility that the capillary tube of the refrigeration cycle is blocked. This may lead to a decrease in the circulation amount of the refrigerant.
  • Patent Document 3 when low viscosity oil (lubricating oil) having a kinematic viscosity at 40 ° C. of 8 mm 2 / s or less is used, the content of extractable low molecular components contained in the resin member is set to 0. The structure which makes it less than 1 weight part is disclosed. Note that Patent Document 3 exemplifies examples having kinematic viscosities at 40 ° C. of 10 mm 2 / s, 8 mm 2 / s, and 5 mm 2 / s as examples.
  • the present invention has been made to solve such problems, and a hermetic refrigerant compressor capable of realizing good reliability even when a low-viscosity lubricating oil is used, and the same It aims at providing a freezing apparatus provided with.
  • 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 inside, and the member accommodated in the sealed container includes a resin member, and the resin member has an amount of oligomer contained in the resin member of the total weight of the resin member. are those of the following, the lubricating oil is within a kinematic viscosity at 40 ° C. of 0.1mm 2 /s ⁇ 5.1m2.5 wt% m 2 / s, and a flash point 110 ° C. or higher It is the composition which is.
  • the amount of the oligomer of the resin member in the sealed container is limited, and the lubricating oil whose kinematic viscosity is within the above range and whose lower limit of the flash point is the above value is used. Even if it is a low-viscosity lubricating oil, if the flash point is relatively high, it becomes difficult for the lubricating oil to penetrate into the resin member, so that it is difficult for the oligomer to be extracted from the resin member.
  • the present invention also includes a refrigeration apparatus including the hermetic refrigerant compressor having the above-described configuration. Thereby, a refrigeration apparatus having good reliability can be provided.
  • the above configuration can provide a hermetic refrigerant compressor capable of realizing good reliability even when a low-viscosity lubricating oil is used, and a refrigeration apparatus including the same. , Has the effect.
  • a hermetic refrigerant compressor includes a compression element that is housed in a hermetic container, compresses the refrigerant, and an electric element that drives the compression element, and lubricating oil is stored in the hermetic container.
  • the member accommodated in the sealed container includes a resin member, and the resin member has an oligomer amount of 2.5% by weight or less of the total weight of the resin member.
  • the amount of the oligomer of the resin member in the sealed container is limited, and the lubricating oil whose kinematic viscosity is within the above range and whose lower limit of the flash point is the above value is used. Even if it is a low-viscosity lubricating oil, if the flash point is relatively high, it becomes difficult for the lubricating oil to penetrate into the resin member, so that it is difficult for the oligomer to be extracted from the resin member.
  • the oligomer amount may be in a range of 0.01 to 1% by weight of the total weight of the resin member.
  • the oligomer amount of the resin member is within the above range, the oligomer component is more difficult to be extracted from the resin member.
  • the oligomer may include a dimer, a trimer, and a tetramer alone or at least one of them.
  • the oligomer is at least one of dimer to tetramer, or contains at least one of them, it is difficult to be extracted from the resin member by the low viscosity and high flash point lubricating oil. Become.
  • At least a stabilizer as an additive is added to the lubricating oil in a content within a range of 0.1 to 10% by weight of the total amount of the lubricating oil. It may be a configuration.
  • the stability of the lubricating oil can be improved, and the reliability of the hermetic refrigerant compressor can be improved.
  • the stabilizer may be at least one of an acid scavenger and a fullerene.
  • the stabilizer is an acid scavenger and / or fullerene
  • the stability of the lubricating oil can be improved, and the reliability of the hermetic refrigerant compressor can be improved. it can.
  • the content thereof may be in the range of 0.1 to 5% by weight of the total amount of the lubricating oil. .
  • the stability of the lubricating oil by fullerene can be improved, and the hermetic refrigerant compressor Reliability can be improved.
  • the density of the resin member may be in the range of 1.2 to 3.0 g / cm 3 .
  • the refrigeration apparatus is configured to include the hermetic refrigerant compressor having any one of the configurations described above.
  • the refrigeration apparatus includes a hermetic refrigerant compressor that achieves good reliability even when a low-viscosity lubricating oil is used, and thus provides a refrigeration apparatus with excellent reliability. be able to.
  • 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, and as the lubricating oil 103, one having a low viscosity and a high flash point 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.
  • the amount of oligomer contained in the resin member is 2.5% by weight or less of the total weight of the resin member.
  • Typical resin members include, for example, a suction muffler 125, an insulating member attached to the electric element 106, a cluster 127, and the like. A specific configuration of the resin member will be described later.
  • 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 has a low viscosity and a high flash point.
  • the kinematic viscosity at 40 ° C. in the lubricating oil 103 is in the range of 0.1mm 2 /s ⁇ 5.1mm 2 / s, and the flash point of the lubricating oil 103 is 110 ° C. or higher.
  • the specific configuration of the lubricating oil 103 according to the present disclosure is not particularly limited as long as it is within the kinematic viscosity range and the flash point is equal to or higher than the lower limit value.
  • mineral oil, synthetic oil, or a mixture thereof (mixed oil) can be used.
  • the lubricating oil 103 may contain components other than oily substances such as mineral oil and synthetic oil. Therefore, the lubricating oil 103 according to the present disclosure is a lubricating oil composition containing at least an oily substance. Also good.
  • a mixed oil of mineral oil and synthetic oil can be given.
  • This mixed oil may have a configuration in which mineral oil is the main component and synthetic oil is a subcomponent, or may have a configuration in which synthetic oil is a main component and mineral oil is a subcomponent. May be the main component.
  • the main component here may be a content that allows the mineral oil or synthetic oil to be determined as the “main component” when viewed as the entire lubricating oil 103 (lubricating oil composition).
  • the subcomponent may be a content that becomes a “subcomponent” having a smaller content than the main component oily substance when viewed as the lubricating oil 103 (lubricating oil composition) as a whole.
  • the lubricating oil 103 a mixed oil having a mineral oil as a main component and a synthetic oil as a by-product can be exemplified.
  • 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.
  • 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 lubricating oil 103 By blending (blending) synthetic oil with mineral oil, it is possible not only to lower the viscosity of the lubricating oil 103 but also to prevent the flash point of the lubricating oil 103 from being 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. As long as the lubricating oil 103 can be adjusted to have a low viscosity and a high flash point as described above, it is needless to say that the lubricating oil 103 is not limited to a mixed oil mainly composed of mineral oil and synthetic oil as a by-product. .
  • 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 amount (content) of these additives is not particularly limited, but in the present disclosure, any additive may be added within the range of 0.1 to 10% by weight of the total amount of the lubricating oil 103. 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 10% 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 cannot be obtained, If the content of the agent becomes 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. If the stabilizer is an acid scavenger and / or fullerene, the stability of the lubricating oil 103 can be improved, and the reliability of the refrigerant compressor 100 can be improved.
  • 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 in the range of 0.1 to 10% by weight of the total amount of the lubricating oil 103.
  • 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 stabilizer is fullerene
  • its content is preferably in the range of 0.1 to 5% by weight of the total amount of the lubricating oil 103.
  • the stability of the lubricating oil 103 with fullerene can be further improved.
  • the low-viscosity and high flash point lubricating oil 103 is stored in the sealed container 101, and the member accommodated in the sealed container 101 is a resin member.
  • This resin member has an oligomer amount of 2.5% by weight or less of the total weight of the resin member.
  • An oligomer is a low molecular component contained in a polymer material constituting a resin member, and usually means a polymer obtained by polymerizing monomers constituting the polymer material in a relatively small amount.
  • the specific range of the degree of polymerization of the oligomer is not particularly clearly defined, but typically, the degree of polymerization is 100 or less, or the molecular weight is less than 1000.
  • the oligomer contained in the resin member may be a component having a low degree of polymerization that can be extracted with a general lubricating oil, and is typically a dimer, trimer, or tetramer. At least one of them can be mentioned. These oligomers may be contained alone or at least one of them may be contained. Since these oligomers have a particularly low molecular weight, a general low-viscosity lubricating oil is easily extracted by permeating the resin member.
  • the lubricating oil 103 since the lubricating oil 103 has a low viscosity and a high flash point, it is difficult to extract from the resin member even if the oligomer is at least one of a dimer to a tetramer.
  • the upper limit of the amount of oligomer contained in the resin member may be 2.5% by weight or less of the total weight of the resin member as described above, but within the range of 0.01 to 1% by weight of the total weight of the resin member. I just need it.
  • the oligomer content is about 0.2% by weight of the total weight.
  • the lubricating oil 103 since the lubricating oil 103 has a low viscosity and a high flash point, even if the resin member has a higher oligomer content than the low oligomer type resin, the extraction of the oligomer is effectively suppressed. Can do.
  • the density of the resin member is not particularly limited, but is typically preferably in the range of 1.2 to 3.0 g / cm 3 , and preferably in the range of 1.3 to 1.6 g / cm 3 . It is more preferable that it is within.
  • the density is increased, the lubricating oil 103 is less likely to penetrate into the resin member, so that the oligomer is less likely to be extracted from the resin member. In other words, an oligomer can be easily extracted by the lubricating oil 103 if the resin member has a low density.
  • the oligomer is difficult to be extracted from the resin member by the lubricating oil 103 having a low viscosity and a high flash point.
  • examples of the typical resin member accommodated in the sealed container 101 include the suction muffler 125, the insulating member attached to the electric element 106, and the cluster 127 as described above.
  • 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.
  • 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 member in the sealed container 101 includes the resin member, and the amount of the oligomer included in the resin member is 2.5% by weight of the total weight of the resin member.
  • lubricating oil 103 is stored in hermetic container 101, the kinematic viscosity at 40 ° C. in the range of 0.1mm 2 /s ⁇ 5.1mm 2 / s, and the flash point 110 It is above °C.
  • the amount of oligomer of the resin member in the sealed container 101 is limited, the lubricating oil 103 having a kinematic viscosity within the above range and a lower limit of the flash point is the above value.
  • the lubricating oil has a low viscosity, if the flash point is relatively high, the lubricating oil 103 is less likely to penetrate into the resin member, so that it is difficult for the oligomer to be extracted from the resin member. Therefore, even when the low-viscosity lubricating oil 103 is used, it is possible to use a resin member having a relatively large amount of oligomer as compared with the conventional one, and the sealing performance of the suction lead resulting from the extraction of the oligomer is reduced. It is possible to effectively suppress the possibility of tube clogging. As a result, the reliability of the refrigerant compressor 100 can be improved even when the low-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 will be described in the first embodiment as long as the member in the sealed container 101 includes a resin member and the above-described lubricating oil 103 can be used. The same effect as the effect can be obtained.
  • 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, the resin member is included in the member in the hermetic container 101, and good lubricity can be realized by using the above-described lubricating oil 103. 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 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.
  • the refrigeration apparatus 200 according to Embodiment 2 can reduce power consumption, it can achieve energy saving and improve reliability.
  • 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.

Abstract

This hermetically sealed refrigerant compressor (100) comprises a compression element (107) that is housed inside a hermetically sealed container (101) and compresses a refrigerant; and an electric element (106) that drives the compression element (107). A lubricating oil (103) is stored inside the hermetically sealed container (101), and a resin member is included among members housed inside the hermetically sealed container (101). The resin member is a member wherein the amount of oligomers included in the resin member is less than or equal to 2.5 wt% of the entire weight of the resin member. The lubricating oil 103 has a kinematic viscosity at 40°C within a range from 0.1 mm2/s to 5.1 mm2/s and a flash point of 110°C or higher.

Description

密閉型冷媒圧縮機およびこれを用いた冷凍装置Hermetic refrigerant compressor and refrigeration apparatus using the same
　本発明は、低粘度の潤滑油を用いた良好な信頼性を有する密閉型冷媒圧縮機と、この密閉型冷媒圧縮機を用いた冷凍装置とに関する。 The present invention relates to a hermetic refrigerant compressor having good reliability using a low-viscosity lubricating oil, and a refrigeration apparatus using the hermetic refrigerant compressor.
　近年、地球環境保護の観点から化石燃料の使用を少なくする高効率の冷媒圧縮機の開発が進められている。例えば、高効率化を図るために、より低粘度の潤滑油を用いることが提案されている。 In recent years, a highly efficient refrigerant compressor that reduces the use of fossil fuels has been developed from the viewpoint of protecting the global environment. For example, in order to increase efficiency, it has been proposed to use a lubricating oil having a lower viscosity.
　例えば、特許文献１および２には、低粘度であり、潤滑性が良く、かつ低温領域での長期安定性に優れた冷凍機用潤滑油組成物として、エステルを含有する特定組成のものが開示されている。これら潤滑油組成物は、いずれも４０℃における動粘度が６～２８ｍｍ2 ／ｓの範囲内となっている。 For example, 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.
　ところで、密閉型の冷媒圧縮機においては、密閉容器に収容されている内部構成に樹脂製の部材（樹脂部材）が含まれている。この樹脂部材を構成する樹脂すなわち高分子材料には、高分子成分だけでなくオリゴマー等の低分子成分が含まれている。潤滑油としてより低粘度のものを用いると、樹脂部材に含まれるオリゴマー等の低分子成分が潤滑油により抽出され、冷媒圧縮機の信頼性の低下を招くことが知られている。 By the way, in a hermetic refrigerant compressor, a resin member (resin member) is included in the internal structure housed in the hermetic container. The resin constituting the resin member, that is, the polymer material contains not only a polymer component but also a low molecular component such as an oligomer. It is known that when a lubricant having a lower viscosity is used, low-molecular components such as oligomers contained in the resin member are extracted by the lubricant and the reliability of the refrigerant compressor is reduced.
　具体的には、潤滑油により抽出されたオリゴマーは、例えば、吸入リードに付着し、これが高温で炭化するとオイルスラッジとなって吸入リードに堆積するおそれがある。これにより、吸入リードのシール性の低下を招く可能性がある。また、潤滑油により抽出されたオリゴマーが冷凍サイクルの高圧側に送り出されると、冷凍サイクルのキャピラリーチューブを閉塞する可能性がある。これにより、冷媒の循環量の低下を招く可能性がある。 Specifically, the oligomer extracted by the lubricating oil adheres to, for example, the suction lead, and when this is carbonized at a high temperature, there is a possibility that oil sludge is deposited on the suction lead. As a result, the sealing performance of the suction lead may be reduced. Further, when the oligomer extracted by the lubricating oil is sent to the high pressure side of the refrigeration cycle, there is a possibility that the capillary tube of the refrigeration cycle is blocked. This may lead to a decrease in the circulation amount of the refrigerant.
　そこで、例えば、特許文献３では、４０℃における動粘度が８ｍｍ2 ／ｓ以下の低粘度のオイル（潤滑油）を用いる場合に、樹脂部材に含まれる抽出可能な低分子成分の含有量を０．１重量部以内とする構成が開示されている。なお、特許文献３では、実施例として、４０℃における動粘度が１０ｍｍ2 ／ｓ、８ｍｍ2 ／ｓ、および５ｍｍ2 ／ｓのものを例示している。 Therefore, for example, in Patent Document 3, when low viscosity oil (lubricating oil) having a kinematic viscosity at 40 ° C. of 8 mm 2 / s or less is used, the content of extractable low molecular components contained in the resin member is set to 0. The structure which makes it less than 1 weight part is disclosed. Note that Patent Document 3 exemplifies examples having kinematic viscosities at 40 ° C. of 10 mm 2 / s, 8 mm 2 / s, and 5 mm 2 / s as examples.
特開２００６－１６０７８１号公報JP 2006-160781 A 特開２００６－３２８２７５号公報JP 2006-328275 A 特開２００７－２３９６３２号公報JP 2007-239632 A
　最近では、冷媒圧縮機用の潤滑油として、特許文献１～３に開示される動粘度の範囲の下限を下回る、より低粘度のものを用いることが検討されている。 Recently, it has been studied to use a lower viscosity lower than the lower limit of the kinematic viscosity range disclosed in Patent Documents 1 to 3 as a lubricating oil for a refrigerant compressor.
　ここで、より低粘度の潤滑油を用いれば、樹脂部材に含まれるオリゴマーをより抽出しやすくなり、前述した吸入リードのシール性低下、あるいは、キャピラリーチューブの閉塞等が発生する可能性が高くなる恐れがある。その結果、冷媒圧縮機の信頼性がより低下する可能性がある。 Here, if a lower viscosity lubricating oil is used, it becomes easier to extract the oligomer contained in the resin member, and there is a high possibility that the aforementioned sealing performance of the suction lead is reduced or the capillary tube is blocked. There is a fear. As a result, the reliability of the refrigerant compressor may be further reduced.
　本発明はこのような課題を解決するためになされたものであって、低粘度の潤滑油を用いた場合であっても良好な信頼性を実現することが可能な密閉型冷媒圧縮機およびこれを備える冷凍装置を提供することを目的とする。 The present invention has been made to solve such problems, and a hermetic refrigerant compressor capable of realizing good reliability even when a low-viscosity lubricating oil is used, and the same It aims at providing a freezing apparatus provided with.
　本発明に係る密閉型冷媒圧縮機は、前記の課題を解決するために、密閉容器内に収容され、冷媒を圧縮する圧縮要素と、当該圧縮要素を駆動する電動要素とを備え、前記密閉容器内には潤滑油が貯留されるとともに、当該密閉容器内に収容される部材には樹脂部材が含まれ、前記樹脂部材は、当該樹脂部材に含まれるオリゴマー量が、当該樹脂部材の全重量の以下のものであり、前記潤滑油は、４０℃での動粘度が０．１ｍｍ2 ／ｓ～５．１ｍ２．５重量％ｍ2 ／ｓの範囲内であり、かつ、引火点が１１０℃以上である構成である。 In order to solve the above problems, a hermetic refrigerant compressor according to the present invention 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 inside, and the member accommodated in the sealed container includes a resin member, and the resin member has an amount of oligomer contained in the resin member of the total weight of the resin member. are those of the following, the lubricating oil is within a kinematic viscosity at 40 ° C. of 0.1mm 2 /s~5.1m2.5 wt% m 2 / s, and a flash point 110 ° C. or higher It is the composition which is.
　前記構成によれば、密閉容器内の樹脂部材のオリゴマー量を限定するとともに、動粘度が前記の範囲内に入り、かつ、引火点の下限が前記値となる潤滑油を用いている。低粘度の潤滑油であっても引火点が相対的に高ければ、樹脂部材に潤滑油が浸透しにくくなるため、樹脂部材からオリゴマーが抽出されにくくなる。そのため、低粘度の潤滑油を用いても、従来よりもオリゴマー量が相対的に多い樹脂部材を用いることが可能になるとともに、オリゴマーの抽出に由来する吸入リードのシール性低下、あるいは、キャピラリーチューブの閉塞等が発生する可能性を有効に抑制することができる。その結果、低粘度の潤滑油を用いた場合であっても密閉型冷媒圧縮機の信頼性を良好なものとすることができる。 According to the above configuration, the amount of the oligomer of the resin member in the sealed container is limited, and the lubricating oil whose kinematic viscosity is within the above range and whose lower limit of the flash point is the above value is used. Even if it is a low-viscosity lubricating oil, if the flash point is relatively high, it becomes difficult for the lubricating oil to penetrate into the resin member, so that it is difficult for the oligomer to be extracted from the resin member. Therefore, even if a low-viscosity lubricating oil is used, it is possible to use a resin member having a relatively large amount of oligomer as compared with the conventional one, and a reduction in the sealing performance of the suction lead derived from the extraction of the oligomer, or a capillary tube It is possible to effectively suppress the possibility of occurrence of blockage. As a result, even when a low-viscosity lubricating oil is used, the reliability of the hermetic refrigerant compressor can be improved.
　また、本発明には、前記構成の密閉型冷媒圧縮機を備える冷凍装置も含まれる。これにより、良好な信頼性を有する冷凍装置を提供することができる。 The present invention also includes a refrigeration apparatus including the hermetic refrigerant compressor having the above-described configuration. Thereby, a refrigeration apparatus having good reliability can be provided.
　本発明では、以上の構成により、低粘度の潤滑油を用いた場合であっても良好な信頼性を実現することが可能な密閉型冷媒圧縮機およびこれを備える冷凍装置を提供することができる、という効果を奏する。 In the present invention, the above configuration can provide a hermetic refrigerant compressor capable of realizing good reliability even when a low-viscosity lubricating oil is used, and a refrigeration apparatus including the same. , Has the effect.
本開示の実施の形態１に係る密閉型冷媒圧縮機の代表的な構成の一例を示す概略断面図である。It is a schematic sectional drawing showing an example of typical composition of a closed type refrigerant compressor concerning Embodiment 1 of this indication. 本開示の実施の形態２に係る冷凍装置の代表的な構成の一例を示す模式図である。It is a schematic diagram which shows an example of the typical structure of the freezing apparatus which concerns on Embodiment 2 of this indication.
　本開示に係る密閉型冷媒圧縮機は、密閉容器内に収容され、冷媒を圧縮する圧縮要素と、当該圧縮要素を駆動する電動要素とを備え、前記密閉容器内には潤滑油が貯留されるとともに、当該密閉容器内に収容される部材には樹脂部材が含まれ、前記樹脂部材は、当該樹脂部材に含まれるオリゴマー量が、当該樹脂部材の全重量の２．５重量％以下のものであり、前記潤滑油は、４０℃での動粘度が０．１ｍｍ2 ／ｓ～５．１ｍｍ2 ／ｓの範囲内であり、かつ、引火点が１１０℃以上である構成である。 A hermetic refrigerant compressor according to the present disclosure includes a compression element that is housed in a hermetic container, compresses the refrigerant, and an electric element that drives the compression element, and lubricating oil is stored in the hermetic container. In addition, the member accommodated in the sealed container includes a resin member, and the resin member has an oligomer amount of 2.5% by weight or less of the total weight of the resin member. There, the lubricating oil, kinematic viscosity at 40 ° C. in the range of 0.1mm 2 /s~5.1mm 2 / s, and a configuration flash point of 110 ° C. or higher.
　前記構成によれば、密閉容器内の樹脂部材のオリゴマー量を限定するとともに、動粘度が前記の範囲内に入り、かつ、引火点の下限が前記値となる潤滑油を用いている。低粘度の潤滑油であっても引火点が相対的に高ければ、樹脂部材に潤滑油が浸透しにくくなるため、樹脂部材からオリゴマーが抽出されにくくなる。そのため、低粘度の潤滑油を用いても、従来よりもオリゴマー量が相対的に多い樹脂部材を用いることが可能になるとともに、オリゴマーの抽出に由来する吸入リードのシール性低下、あるいは、キャピラリーチューブの閉塞等が発生する可能性を有効に抑制することができる。その結果、低粘度の潤滑油を用いた場合であっても密閉型冷媒圧縮機の信頼性を良好なものとすることができる。 According to the above configuration, the amount of the oligomer of the resin member in the sealed container is limited, and the lubricating oil whose kinematic viscosity is within the above range and whose lower limit of the flash point is the above value is used. Even if it is a low-viscosity lubricating oil, if the flash point is relatively high, it becomes difficult for the lubricating oil to penetrate into the resin member, so that it is difficult for the oligomer to be extracted from the resin member. Therefore, even if a low-viscosity lubricating oil is used, it is possible to use a resin member having a relatively large amount of oligomer as compared with the conventional one, and a reduction in the sealing performance of the suction lead derived from the extraction of the oligomer, or a capillary tube It is possible to effectively suppress the possibility of occurrence of blockage. As a result, even when a low-viscosity lubricating oil is used, the reliability of the hermetic refrigerant compressor can be improved.
　前記構成の密閉型冷媒圧縮機においては、前記オリゴマー量は、前記樹脂部材の全重量の０．０１～１重量％の範囲内である構成であればよい。 In the hermetic refrigerant compressor having the above configuration, the oligomer amount may be in a range of 0.01 to 1% by weight of the total weight of the resin member.
　前記構成によれば、樹脂部材のオリゴマー量が前記の範囲内であれば、樹脂部材からオリゴマー成分がより抽出されにくくなる。 According to the above configuration, when the oligomer amount of the resin member is within the above range, the oligomer component is more difficult to be extracted from the resin member.
　また、前記構成の密閉型冷媒圧縮機においては、前記オリゴマーは、２量体、３量体、および４量体の単体もしくは少なくともいずれか一つ以上を含む構成であってもよい。 Further, in the sealed refrigerant compressor having the above-described configuration, the oligomer may include a dimer, a trimer, and a tetramer alone or at least one of them.
　前記構成によれば、オリゴマーが２～４量体の少なくともいずれか単体であるか、これらいずれか一つ以上含むものであれば、低粘度かつ高引火点の潤滑油により樹脂部材から抽出されにくくなる。 According to the above configuration, if the oligomer is at least one of dimer to tetramer, or contains at least one of them, it is difficult to be extracted from the resin member by the low viscosity and high flash point lubricating oil. Become.
　また、前記構成の密閉型冷媒圧縮機においては、前記潤滑油には、添加剤として少なくとも安定剤が、前記潤滑油全量の０．１～１０重量％の範囲内の含有量で添加されている構成であってもよい。 In the hermetic refrigerant compressor having the above structure, at least a stabilizer as an additive is added to the lubricating oil in a content within a range of 0.1 to 10% by weight of the total amount of the lubricating oil. It may be a configuration.
　前記構成によれば、潤滑油に対して少なくとも安定剤を添加することで、潤滑油の安定性を良好なものとすることができ、密閉型冷媒圧縮機の信頼性を向上することができる。 According to the above configuration, by adding at least a stabilizer to the lubricating oil, the stability of the lubricating oil can be improved, and the reliability of the hermetic refrigerant compressor can be improved.
　また、前記構成の密閉型冷媒圧縮機においては、前記安定剤が、酸捕捉剤およびフラーレンの少なくとも一方である構成であってもよい。 Further, in the sealed refrigerant compressor having the above configuration, the stabilizer may be at least one of an acid scavenger and a fullerene.
　前記構成によれば、安定剤が酸捕捉剤またはフラーレンもしくはその両方であれば、潤滑油の安定性をより良好なものとすることができ、密閉型冷媒圧縮機の信頼性を向上することができる。 According to the above configuration, if the stabilizer is an acid scavenger and / or fullerene, the stability of the lubricating oil can be improved, and the reliability of the hermetic refrigerant compressor can be improved. it can.
　また、前記構成の密閉型冷媒圧縮機においては、前記安定剤がフラーレンであれば、その含有量は、前記潤滑油全量の０．１～５重量％の範囲内である構成であってもよい。 In the sealed refrigerant compressor having the above configuration, if the stabilizer is fullerene, the content thereof may be in the range of 0.1 to 5% by weight of the total amount of the lubricating oil. .
　前記構成によれば、フラーレンを安定剤として添加する場合の含有量が前記の範囲内であれば、フラーレンによる潤滑油の安定性をより良好なものとすることができ、密閉型冷媒圧縮機の信頼性を向上することができる。 According to the above configuration, if the content when fullerene is added as a stabilizer is within the above range, the stability of the lubricating oil by fullerene can be improved, and the hermetic refrigerant compressor Reliability can be improved.
　また、前記構成の密閉型冷媒圧縮機においては、前記樹脂部材の密度は１．２～３．０ｇ／ｃｍ3 の範囲内である構成であってもよい。 In the sealed refrigerant compressor having the above configuration, the density of the resin member may be in the range of 1.2 to 3.0 g / cm 3 .
　前記構成によれば、樹脂部材の密度が前記の範囲内であっても、低粘度かつ高引火点の潤滑油により樹脂部材から抽出されにくくなる。 According to the above configuration, even if the density of the resin member is within the above range, it is difficult to be extracted from the resin member by the lubricating oil having a low viscosity and a high flash point.
　さらに、本開示に係る冷凍装置は、前記いずれかの構成の密閉型冷媒圧縮機を備える構成である。これにより、冷凍装置は、低粘度の潤滑油を用いた場合であっても良好な信頼性を実現する密閉型冷媒圧縮機を備えていることになるので、信頼性に優れる冷凍装置を提供することができる。 Furthermore, the refrigeration apparatus according to the present disclosure is configured to include the hermetic refrigerant compressor having any one of the configurations described above. As a result, the refrigeration apparatus includes a hermetic refrigerant compressor that achieves good reliability even when a low-viscosity lubricating oil is used, and thus provides a refrigeration apparatus with excellent reliability. be able to.
　以下、本発明の代表的な実施の形態を、図面を参照しながら説明する。なお、以下では全ての図を通じて同一又は相当する要素には同一の参照符号を付して、その重複する説明を省略する。 Hereinafter, typical embodiments of the present invention will be described with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same reference symbols throughout the drawings, and redundant description thereof is omitted.
　（実施の形態１）
　［冷媒圧縮機の構成］
　まず、本実施の形態１に係る冷媒圧縮機の代表的な一例について、図１を参照して具体的に説明する。図１は、本実施の形態１に係る冷媒圧縮機１００の概略断面図である。 (Embodiment 1)
[Configuration of refrigerant compressor]
First, a typical example of the refrigerant compressor according to the first embodiment will be specifically described with reference to FIG. FIG. 1 is a schematic cross-sectional view of a refrigerant compressor 100 according to the first embodiment.
　図１に示すように、冷媒圧縮機１００においては、密閉容器１０１内には、冷媒ガス１０２が充填されるとともに、底部には潤滑油１０３が貯留されている。本開示では、冷媒ガス１０２としては、後述するように、例えば、炭化水素系冷媒が用いられ、潤滑油１０３としては、後述するように、低粘度かつ高引火点のものが用いられる。また、密閉容器１０１内には、固定子１０４および回転子１０５からなる電動要素１０６と、これによって駆動される往復式の圧縮要素１０７とが収容されている。 As shown in FIG. 1, in the refrigerant compressor 100, the hermetic container 101 is filled with the refrigerant gas 102, and the lubricating oil 103 is stored at the bottom. In the present disclosure, as described later, for example, a hydrocarbon-based refrigerant is used as the refrigerant gas 102, and as the lubricating oil 103, one having a low viscosity and a high flash point is used as described later. In the sealed container 101, 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.
　そして、圧縮要素１０７は、クランクシャフト１０８、シリンダーブロック１１２、ピストン１１５等によって構成されている。圧縮要素１０７の構成を以下に説明する。 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.
　クランクシャフト１０８は、回転子１０５を圧入固定した主軸部１０９と、主軸部１０９に対し偏心して形成された偏心軸１１０と、から少なくとも構成される。クランクシャフト１０８の下端には潤滑油１０３に連通する給油ポンプ１１１を備えている。 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.
　シリンダーブロック１１２は鋳鉄からなり、略円筒形のボアー１１３を形成するとともに、主軸部１０９を軸支する軸受部１１４を備えている。 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.
　また、回転子１０５にはフランジ面１１６が形成され、軸受部１１４の上端面がスラスト面１１７になっている。フランジ面１１６と軸受部１１４のスラスト面１１７との間には、スラストワッシャ１１８が挿入されている。フランジ面１１６、スラスト面１１７およびスラストワッシャ１１８でスラスト軸受１１９を構成している。 Further, 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.
　ピストン１１５はある一定量のクリアランスを保ってボアー１１３に遊嵌され、鉄系の材料からなり、ボアー１１３と共に圧縮室１２０を形成する。また、ピストン１１５は、ピストンピン１２１を介して連結手段であるコンロッド１２２により偏心軸１１０と連結されている。ボアー１１３の端面はバルブプレート１２３で封止されている。 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.
　ヘッド１２４は高圧室を形成している。ヘッド１２４は、バルブプレート１２３のボアー１１３の反対側に固定される。サクションチューブ（図示せず）は、密閉容器１０１に固定されるとともに冷凍サイクルの低圧側（図示せず）に接続され、冷媒ガス１０２を密閉容器１０１内に導く。サクションマフラー１２５は、バルブプレート１２３とヘッド１２４に挟持される。 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.
　電動要素１０６を構成する固定子１０４には、リード線１２６を介してクラスタ１２７が接続されている。また、密閉容器１０１には、当該密閉容器１０１の内外を貫通するターミナル１２８が設けられている。ターミナル１２８にはクラスタ１２７が連結される。これにより、商用電源（図示せず）から電動要素１０６に対して電力が供給される。 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).
　本開示に係る冷媒圧縮機１００で用いられる冷媒ガス１０２の種類は特に限定されないが、前述した炭化水素系冷媒が好ましく用いられる。炭化水素系冷媒としては、具体的には、例えば、Ｒ２９０（プロパン）、Ｒ６００ａ（イソブタン）、Ｒ６００（ブタン）、Ｒ１２７０（プロピレン）等が挙げられるが特に限定されない。代表的な炭化水素系冷媒としては、Ｒ６００ａまたはＲ２９０が挙げられる。 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.
　また、本開示に係る冷媒圧縮機１００では、後述するように、低粘度かつ高引火点の潤滑油１０３を用いており、この潤滑油１０３は、前記の通り、鉱油および合成油の混合油である。冷媒ガス１０２は、冷媒圧縮機１００を含む冷媒回路（冷凍サイクル、実施の形態２参照）で用いられ、密閉容器１０１内で冷媒ガス１０２と潤滑油１０３とは接触および混合可能な状態で存在する。それゆえ、冷媒ガス１０２および潤滑油１０３は、冷凍サイクル用作動媒体を構成していると見なすこともできる。この冷凍サイクル用作動媒体は、冷媒成分および潤滑油成分に加えて、他の成分を含んでもよい。 Moreover, in the refrigerant compressor 100 according to the present disclosure, as described later, the lubricating oil 103 having a low viscosity and a high flash point is used. As described above, 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.
　ここで、本開示に係る冷媒圧縮機１００においては、密閉容器１０１内に収容されている構成に樹脂部材が含まれている。樹脂部材は、樹脂すなわち高分子で少なくとも構成される部材であれば特に限定されないが、本開示においては、樹脂部材に含まれるオリゴマー量が当該樹脂部材の全重量の２．５重量％以下となっている。代表的な樹脂部材としては、例えば、サクションマフラー１２５、電動要素１０６に装着される絶縁部材、クラスタ１２７等を挙げることができる。なお、樹脂部材の具体的な構成については後述する。 Here, in the refrigerant compressor 100 according to the present disclosure, 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. In the present disclosure, the amount of oligomer contained in the resin member is 2.5% by weight or less of the total weight of the resin member. ing. Typical resin members include, for example, a suction muffler 125, an insulating member attached to the electric element 106, a cluster 127, and the like. A specific configuration of the resin member will be described later.
　このような構成を有する、本開示に係る冷媒圧縮機１００について、その動作の一例について説明する。まず、商用電源（図示せず）からターミナル１２８およびクラスタ１２７を介して電動要素１０６に電力が供給され、これにより電動要素１０６の回転子１０５が回転する。回転子１０５はクランクシャフト１０８を回転させ、偏心軸１１０の偏心運動が連結手段のコンロッド１２２からピストンピン１２１を介してピストン１１５を駆動する。 An example of the operation of the refrigerant compressor 100 according to the present disclosure having such a configuration will be described. First, electric power is supplied from a commercial power source (not shown) to the electric element 106 via the terminal 128 and the cluster 127, and thereby the rotor 105 of the electric element 106 rotates. The rotor 105 rotates the crankshaft 108, and the eccentric motion of the eccentric shaft 110 drives the piston 115 from the connecting rod 122 of the connecting means via the piston pin 121.
　ピストン１１５はボアー１１３内を往復運動し、サクションチューブ（図示せず）を通して密閉容器１０１内に導かれた冷媒ガス１０２をサクションマフラー１２５から吸入し、圧縮室１２０内で圧縮する。潤滑油１０３はクランクシャフト１０８の回転に伴い、給油ポンプ１１１から各摺動部に給油され、摺動部を潤滑するとともに、ピストン１１５とボアー１１３の間においてはシールを司る。 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. As the crankshaft 108 rotates, 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.
　［潤滑油の構成］
　ここで、近年では、さらなる高効率化を図るため、潤滑油１０３としてより粘度の低いものを使用する等の対応が行われている。本開示では、冷媒圧縮機１００に用いられている潤滑油１０３が、前記の通り、低粘度かつ高引火点を有するものである。具体的には、潤滑油１０３における４０℃での動粘度は０．１ｍｍ2 ／ｓ～５．１ｍｍ2 ／ｓの範囲内であり、かつ、潤滑油１０３の引火点が１１０℃以上である。 [Composition of lubricating oil]
Here, in recent years, in order to further increase the efficiency, measures such as using a lower viscosity as the lubricating oil 103 have been taken. In the present disclosure, as described above, the lubricating oil 103 used in the refrigerant compressor 100 has a low viscosity and a high flash point. Specifically, the kinematic viscosity at 40 ° C. in the lubricating oil 103 is in the range of 0.1mm 2 /s~5.1mm 2 / s, and the flash point of the lubricating oil 103 is 110 ° C. or higher.
　本開示に係る潤滑油１０３の具体的な構成は特に限定されず、前記の動粘度の範囲内であり、引火点が前記下限値以上の物であればよい。代表的には、鉱油、合成油、またはこれらの混合物（混合油）を挙げることができる。また、潤滑油１０３には、鉱油、合成油等の油状物質以外の成分を含有してもよい、したがって、本開示に係る潤滑油１０３は、油状物質を少なくとも含有する潤滑油組成物であってもよい。 The specific configuration of the lubricating oil 103 according to the present disclosure is not particularly limited as long as it is within the kinematic viscosity range and the flash point is equal to or higher than the lower limit value. Typically, mineral oil, synthetic oil, or a mixture thereof (mixed oil) can be used. The lubricating oil 103 may contain components other than oily substances such as mineral oil and synthetic oil. Therefore, the lubricating oil 103 according to the present disclosure is a lubricating oil composition containing at least an oily substance. Also good.
　本開示に係る潤滑油１０３の代表的な一例としては、鉱油および合成油の混合油を挙げることができる。この混合油は、鉱油が主成分であって合成油が副成分である構成であってもよいし、合成油が主成分であって鉱油が副成分である構成であってもよいし、両者が主成分である構成であってもよい。ここでいう主成分とは、鉱油または合成油が、潤滑油１０３（潤滑油組成物）全体として見たときに「主成分」と判断できる含有量であればよい。同様に、副成分とは、潤滑油１０３（潤滑油組成物）全体として見たときに主成分の油状物質よりも含有量の少ない「副成分」となる含有量であればよい。 As a representative example of the lubricating oil 103 according to the present disclosure, a mixed oil of mineral oil and synthetic oil can be given. This mixed oil may have a configuration in which mineral oil is the main component and synthetic oil is a subcomponent, or may have a configuration in which synthetic oil is a main component and mineral oil is a subcomponent. May be the main component. The main component here may be a content that allows the mineral oil or synthetic oil to be determined as the “main component” when viewed as the entire lubricating oil 103 (lubricating oil composition). Similarly, the subcomponent may be a content that becomes a “subcomponent” having a smaller content than the main component oily substance when viewed as the lubricating oil 103 (lubricating oil composition) as a whole.
　本開示においては、潤滑油１０３のより具体的な一例として、鉱油を主成分とし合成油を副生分とする混合油を挙げることができる。潤滑油１０３の全量を１００重量％として見たときに、副成分である合成油の含有量としては、例えば、０．１～４０．０重量％の範囲内であればよく、１～３５重量％の範囲内を好ましい一例として挙げることができ、５～２５重量％の範囲内をより好ましい一例として挙げることができる。また、潤滑油１０３における主成分である鉱油の含有量は合成油よりも多ければよい。例えば、合成油の含有量が、前記の通り、潤滑油１０３全量の４０．０重量％以下であれば、鉱油の含有量は、潤滑油１０３全量の４０．０重量％を超えていればよく、例えば、５０重量％以上であってもよい。 In the present disclosure, as a more specific example of the lubricating oil 103, a mixed oil having a mineral oil as a main component and a synthetic oil as a by-product can be exemplified. When the total amount of the lubricating oil 103 is taken as 100% by weight, 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. Moreover, 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.
　鉱油に対して合成油を配合（ブレンド）することによって、単に潤滑油１０３を低粘度化するだけでなく、潤滑油１０３の引火点が低下しないよう調整することができる。そのため、合成油の含有量を前記の範囲内にすることで、潤滑油１０３の動粘度および引火点の下限を前述した数値範囲に容易に調整することが可能になる。なお、潤滑油１０３を前記の通り低粘度かつ高引火点に調整できるのであれば、潤滑油１０３としては、鉱油を主成分とし合成油を副生分とする混合油に限定されないことは言うまでもない。 By blending (blending) synthetic oil with mineral oil, it is possible not only to lower the viscosity of the lubricating oil 103 but also to prevent the flash point of the lubricating oil 103 from being 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. As long as the lubricating oil 103 can be adjusted to have a low viscosity and a high flash point as described above, it is needless to say that the lubricating oil 103 is not limited to a mixed oil mainly composed of mineral oil and synthetic oil as a by-product. .
　潤滑油１０３を構成する鉱油および合成油の種類は特に限定されない。鉱油としては、一般的には、パラフィン系鉱油、ナフテン系鉱油が挙げられるが、本開示においては、これらいずれの鉱油が用いられてもよいし、これらが混合して用いられてもよい。また、物性の異なる複数種類のパラフィン系鉱油を組み合わせて用いてもよいし、同様に、物性の異なる複数種類のナフテン系鉱油を組み合わせて用いてもよいし、異なるパラフィン系鉱油の組合せと異なるナフテン系鉱油の組合せとを混合して用いてもよい。 The types of mineral oil and synthetic oil constituting the lubricating oil 103 are not particularly limited. Generally, 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.
　合成油としては、具体的には、例えば、ポリアルファオレフィン油、アルキルベンゼン油、エステル油、エーテル油、ポリアルキレングリコール油、フッ素系合成油、シリコン系合成油等が挙げられるが、特に限定されない。これら合成油は、１種類のみを選択して鉱油に配合してもよいし、複数種類を組み合わせて鉱油に配合してもよい。 Specific examples of the synthetic oil 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.
　これらの中でも、本開示においては、特に、エステル油、エーテル油、ポリアルキレングリコール油、およびアルキルベンゼン油からなる群より選択される少なくともいずれか１種を用いることが好ましい。これら合成油の少なくともいずれか１種を鉱油に配合することで、潤滑油１０３の動粘度および引火点の下限を前記の数値範囲に容易に調整することが可能になる。また、合成油の種類によっては、潤滑油１０３に対して、前述した動粘度および引火点の下限以外の特性を付与することが可能となる。例えば、合成油として極性を有するエステル油を選択して鉱油に配合することで、潤滑油１０３に極性を付与することが可能となる。 Among these, in the present disclosure, 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. 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. In addition, depending on the type of synthetic oil, it is possible to impart characteristics other than the lower limits of the kinematic viscosity and the flash point described above to the lubricating oil 103. For example, 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.
　本開示においては、少なくとも鉱油および合成油を混合して潤滑油１０３を製造することにより、前記の通り、４０℃における動粘度を０．１ｍｍ2 ／ｓ～５．１ｍｍ2 ／ｓの範囲内に調整するとともに、引火点を１１０℃以上に調整している。ここで、潤滑油１０３の４０℃における動粘度は前記の範囲内であれば特に限定されないものの、例えば、０．１ｍｍ2 ／ｓ～４．５ｍｍ2 ／ｓの範囲内を好ましい一例として挙げることができ、０．１ｍｍ2 ／ｓ以上３．０ｍｍ2 ／ｓ未満の範囲内をより好ましい一例として挙げることができる。なお、本開示における動粘度は、ＪＩＳ　Ｋ２２８３に基づいて測定したものである。 In the present disclosure, by producing lubricating oil 103 is mixed at least mineral and synthetic oils, as described above, the kinematic viscosity at 40 ° C. in the range of 0.1mm 2 /s~5.1mm 2 / s While adjusting, the flash point is adjusted to 110 ° C. or higher. Here, although 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.
　潤滑油１０３の４０℃における動粘度が５．１ｍｍ2 ／ｓを超えると、潤滑油１０３をより低粘度化していることにならないため、低粘度化による高効率化の効果が十分に得られない。一方、４０℃における動粘度が０．１ｍｍ2 ／ｓ未満であれば、潤滑油１０３としての潤滑効果を十分に得られないおそれがある。 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.
　同様に、本開示においては、潤滑油１０３の引火点の下限は１１０℃以上であれば特に限定されないものの、例えば、１２０℃以上を好ましい一例として挙げることができ、１５０℃以上をより好ましい一例として挙げることができる。なお、本開示における引火点は、ＪＩＳ　Ｋ２２６５に基づいて測定したものである。潤滑油１０３の引火点の下限が１１０℃未満であれば、潤滑油１０３の取扱いに際して火気に対するより厳重な注意が必要になるとともに、特別な保管条件を満たさなければ経時的に粘度が上昇するおそれがある。それゆえ、潤滑油１０３の取扱性が低下する。 Similarly, in the present disclosure, 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. For example, 120 ° C. or higher can be cited as a preferred example, and 150 ° C. or higher is a more preferred example. Can be mentioned. In addition, 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.
　具体的には、潤滑油１０３の引火点が低下すれば、潤滑油１０３に含まれる低蒸留成分が多くなる。そのため、通常の条件で保管すると、潤滑油１０３に含まれる低蒸留成分が先に蒸発して粘度が経時的に上昇するおそれがある。一般的な潤滑油１０３は、低真空かつ高温の条件、例えば、１０-2Ｐａ雰囲気かつ４０～６０℃の温度範囲で保管するが、潤滑油１０３の引火点が低ければ、このような低真空かつ高温の条件では、低蒸留成分が蒸発して経時的に粘度が上昇する。そのため、化学フィルターを用いた特別な保管条件が必要となる。 Specifically, if the flash point of the lubricating oil 103 decreases, 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.
　ここで、潤滑油１０３においては、４０℃における動粘度の範囲と、引火点の下限値だけでなく、さらに、所定の蒸留特性を満たすことがより好ましい。具体的には、本開示に係る潤滑油１０３は、蒸留範囲が２００～４００℃の蒸留特性（すなわち初留点が２００℃で終点が４００℃の蒸留特性）を有するものであることが好ましい。なお、本開示における蒸留特性は、ＪＩＳ　Ｋ２２５４に基づいて測定したものである。 Here, it is more preferable that 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. Specifically, 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.). In addition, the distillation characteristic in this indication is measured based on JIS K2254.
　鉱油は基本的には多数種類の油状物質の混合物であるため、幅広い蒸留特性を有するが、合成油は基本的には合成された単独種類（もしくは数種類）の化合物で構成されているため、その蒸留特性は一点（もしくは数点）に特定される。それゆえ、鉱油に合成油を配合することで、混合油である潤滑油１０３の蒸留特性を前記の蒸留範囲に調整することが可能となる。なお、必要に応じて、鉱油についても前記の蒸留範囲に入るように精製してもよい。 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 | purify mineral oil so that it may enter into the said distillation range as needed.
　本開示においては、潤滑油１０３が、４０℃における動粘度の範囲および引火点の下限値という基本条件に加えて、前記の蒸留特性という条件を満たしていれば、潤滑油１０３に含まれる低蒸留成分をより少なくすることができる。それゆえ、潤滑油１０３の引火点の低下傾向をより一層有効に抑制できるとともに、潤滑油１０３の安定性も良好なものとすることができる。その結果、潤滑油１０３の取扱性をより一層好適なものとすることができる。 In the present disclosure, if 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.
　本開示に係る潤滑油１０３は、前記の通り、鉱油および合成油により構成される潤滑油組成物であり、鉱油および合成油以外の他の成分を含んでもよい。具体的な他の成分としては、潤滑油１０３の分野で公知の各種の添加剤を挙げることができる。 As described above, the lubricating oil 103 according to the present disclosure 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.
　具体的な添加剤としては、特に限定されないが、例えば、極圧添加剤、油性剤、消泡剤および安定剤の少なくともいずれかを挙げることができる。鉱油および合成油の混合油に対して、これら添加剤を添加することで、潤滑油１０３の性質を改善し、冷媒圧縮機１００の信頼性を向上することができる。 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.
　これら添加剤の添加量（含有量）は特に限定されないが、本開示においては、いずれの添加剤も、潤滑油１０３全量の０．１～１０重量％の範囲内で添加されていればよい。添加剤の含有量が潤滑油１０３全量の０．１重量％未満であれば、添加剤の種類にもよるが、添加量が少なすぎて添加剤による効果が十分に得られないおそれがある。これに対して、添加剤の含有量が潤滑油１０３全量の１０重量％を超えると、添加剤の種類にもよるが、添加量に見合った添加剤による効果が得られなくなるだけでなく、添加剤の含有量が過剰になることで、潤滑油１０３の他の物性に影響を及ぼすおそれがある。 The amount (content) of these additives is not particularly limited, but in the present disclosure, any additive may be added within the range of 0.1 to 10% by weight of the total amount of the lubricating oil 103. 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 10% 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 cannot be obtained, If the content of the agent becomes excessive, other physical properties of the lubricating oil 103 may be affected.
　本開示においては、代表的な添加剤として安定剤を挙げることができる。安定剤の添加により、低粘度かつ高引火点の潤滑油１０３の物性を良好に安定化することができる。本開示においては、安定剤としては、酸捕捉剤またはフラーレンを挙げることができる。安定剤が酸捕捉剤またはフラーレンもしくはその両方であれば、潤滑油１０３の安定性をより良好なものとすることができ、冷媒圧縮機１００の信頼性を向上することができる。 In the present disclosure, stabilizers may be mentioned as typical additives. By adding the stabilizer, the physical properties of the lubricating oil 103 having a low viscosity and a high flash point can be satisfactorily stabilized. In the present disclosure, the stabilizer may include an acid scavenger or fullerene. If the stabilizer is an acid scavenger and / or fullerene, the stability of the lubricating oil 103 can be improved, and the reliability of the refrigerant compressor 100 can be improved.
　酸捕捉剤は、水または酸素により基油（鉱油および合成油で構成される混合油）が劣化して酸価が上昇することを抑制するために用いられる。酸捕捉剤の添加により基油である混合油の劣化を抑制することで、潤滑油１０３の４０℃における動粘度が前記の範囲内から外れることを有効に抑制することができる。 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. By suppressing the deterioration of the mixed oil as the base oil by adding the acid scavenger, it is possible to effectively suppress the kinematic viscosity at 40 ° C. of the lubricating oil 103 from being out of the above range.
　なお、酸捕捉剤の具体的な種類は特に限定されず、公知のものを好適に用いることができる。また、フラーレンは、潤滑油１０３の引火点の低下を抑制する作用を有するため「引火点低下抑制剤」として用いることができる。それゆえ、フラーレンの添加により潤滑油１０３における引火点をより一層有効に抑制することができる。 In addition, the specific kind of acid scavenger is not specifically limited, A well-known thing can be used suitably. In addition, 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.
　安定剤である酸捕捉剤および／またはフラーレンの添加量は、前記の通り、潤滑油１０３全量の０．１～１０重量％の範囲内であればよい。これら安定剤の添加量（含有量）を前記の範囲内に調整することで、潤滑油１０３の性質を適量の安定剤で改善することができるため、冷媒圧縮機１００の信頼性をより一層向上することができる。特に、安定剤がフラーレンであれば、その含有量は、潤滑油１０３全量の０．１～５重量％の範囲内であることが好ましい。これにより、フラーレンによる潤滑油１０３の安定性をより良好なものとすることができる。 As described above, the addition amount of the acid scavenger and / or fullerene, which is a stabilizer, may be in the range of 0.1 to 10% by weight of the total amount of the lubricating oil 103. By adjusting 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. In particular, if the stabilizer is fullerene, its content is preferably in the range of 0.1 to 5% by weight of the total amount of the lubricating oil 103. Thereby, the stability of the lubricating oil 103 with fullerene can be further improved.
　［樹脂部材の構成］
　本開示に係る冷媒圧縮機１００においては、前記の通り、密閉容器１０１内に低粘度かつ高引火点の潤滑油１０３が貯留されているとともに、密閉容器１０１内に収容される部材には樹脂部材が含まれる。この樹脂部材は、含まれるオリゴマー量が、当該樹脂部材の全重量の２．５重量％以下のものである。オリゴマーは、樹脂部材を構成する高分子材料に含まれる低分子成分であり、通常は、高分子材料を構成するモノマーが、相対的に少ない量で重合したものを意味する。オリゴマーの具体的な重合度の範囲については特に明確に規定されているわけではないが、代表的には、重合度が１００以下のもの、あるいは、分子量が１０００未満のものが挙げられる。 [Configuration of resin member]
In the refrigerant compressor 100 according to the present disclosure, as described above, the low-viscosity and high flash point lubricating oil 103 is stored in the sealed container 101, and the member accommodated in the sealed container 101 is a resin member. Is included. This resin member has an oligomer amount of 2.5% by weight or less of the total weight of the resin member. An oligomer is a low molecular component contained in a polymer material constituting a resin member, and usually means a polymer obtained by polymerizing monomers constituting the polymer material in a relatively small amount. The specific range of the degree of polymerization of the oligomer is not particularly clearly defined, but typically, the degree of polymerization is 100 or less, or the molecular weight is less than 1000.
　本開示においては、樹脂部材に含まれるオリゴマーは、一般的な潤滑油により抽出され得る低重合度の成分であればよく、代表的には、２量体、３量体、および４量体の少なくともいずれかを挙げることができる。これらオリゴマーは単体で含まれてもよいし、もしくは少なくともいずれか一つ以上が含まれてもよい。これらオリゴマーは分子量が特に小さいものであるため、一般的な低粘度の潤滑油であれば、この潤滑油が樹脂部材に浸透することで抽出されやすくなる。しかしながら、本開示においては、潤滑油１０３は、低粘度かつ高引火点であるため、オリゴマーが２～４量体の少なくともいずれかであっても、樹脂部材から抽出されにくくなる。 In the present disclosure, the oligomer contained in the resin member may be a component having a low degree of polymerization that can be extracted with a general lubricating oil, and is typically a dimer, trimer, or tetramer. At least one of them can be mentioned. These oligomers may be contained alone or at least one of them may be contained. Since these oligomers have a particularly low molecular weight, a general low-viscosity lubricating oil is easily extracted by permeating the resin member. However, in the present disclosure, since the lubricating oil 103 has a low viscosity and a high flash point, it is difficult to extract from the resin member even if the oligomer is at least one of a dimer to a tetramer.
　樹脂部材に含まれるオリゴマー量の上限は、前記の通り、樹脂部材の全重量の２．５重量％以下であればよいが、樹脂部材の全重量の０．０１～１重量％の範囲内であればよい。いわゆる低オリゴマータイプの樹脂では、オリゴマーの含有量は全重量の０．２重量％程度とされる。本開示においては、潤滑油１０３が低粘度かつ高引火点のものであるため、低オリゴマータイプの樹脂よりもオリゴマーの含有量が多い樹脂部材であっても、オリゴマーの抽出を有効に抑制することができる。 The upper limit of the amount of oligomer contained in the resin member may be 2.5% by weight or less of the total weight of the resin member as described above, but within the range of 0.01 to 1% by weight of the total weight of the resin member. I just need it. In a so-called low oligomer type resin, the oligomer content is about 0.2% by weight of the total weight. In the present disclosure, since the lubricating oil 103 has a low viscosity and a high flash point, even if the resin member has a higher oligomer content than the low oligomer type resin, the extraction of the oligomer is effectively suppressed. Can do.
　本開示においては、樹脂部材の密度は特に限定されないが、代表的には、１．２～３．０ｇ／ｃｍ3 の範囲内であると好ましく、１．３～１．６ｇ／ｃｍ3 の範囲内であるとより好ましい。一般的には、密度が高くなると潤滑油１０３は樹脂部材に浸透しにくくなるので、オリゴマーが樹脂部材から抽出されにくくなる。言い換えれば、密度の低い樹脂部材であれば、潤滑油１０３によりオリゴマーが抽出されやすくなる。本開示においては、樹脂部材の密度が前記の範囲内のように広くても、樹脂部材から低粘度かつ高引火点の潤滑油１０３によりオリゴマーが抽出されにくくなる。 In the present disclosure, the density of the resin member is not particularly limited, but is typically preferably in the range of 1.2 to 3.0 g / cm 3 , and preferably in the range of 1.3 to 1.6 g / cm 3 . It is more preferable that it is within. In general, when the density is increased, the lubricating oil 103 is less likely to penetrate into the resin member, so that the oligomer is less likely to be extracted from the resin member. In other words, an oligomer can be easily extracted by the lubricating oil 103 if the resin member has a low density. In the present disclosure, even if the density of the resin member is as wide as the above range, the oligomer is difficult to be extracted from the resin member by the lubricating oil 103 having a low viscosity and a high flash point.
　本開示において、密閉容器１０１内に収容されている代表的な樹脂部材としては、前記の通り、例えば、サクションマフラー１２５、電動要素１０６に装着される絶縁部材、クラスタ１２７等を挙げることができる。これら樹脂部材は、樹脂（高分子）のみで構成されてもよいが、例えば、樹脂以外に繊維材料またはフィラー等の異種材料を含む複合材料であってもよい。例えば、クラスタ１２７としては、ガラス繊維を含有するポリエステル系樹脂で成形された部材を挙げることができる。同様にサクションマフラー１２５も、ガラス繊維を含有するポリエステル系樹脂で成形された部材を挙げることができる。 In the present disclosure, examples of the typical resin member accommodated in the sealed container 101 include the suction muffler 125, the insulating member attached to the electric element 106, and the cluster 127 as described above. 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. For example, as the cluster 127, a member formed of a polyester resin containing glass fiber can be used. Similarly, the suction muffler 125 can include a member formed of a polyester resin containing glass fiber.
　樹脂部材を構成する樹脂（高分子）としては特に限定されないが、具体的には、例えば、ポリエチレンテレフタレート（ＰＥＴ）またはポリブチレンテレフタレート（ＰＢＴ）等のポリエステル系樹脂、ポリアミド（ＰＡ）、ポリフェニレンスルフィド（ＰＰＳ）、液晶ポリマー（または液晶ポリエステル、ＬＣＰ）等が挙げられる。これら樹脂は、耐熱性、耐冷媒性、耐油性等に優れているため、密閉容器１０１内に収容される樹脂部材の材料として好ましく用いられる。樹脂部材を構成する樹脂材料は、１種類の樹脂であればよいが、２種類以上を適宜組み合わせたポリマーアロイ（ポリマーブレンド）が用いられてもよい。また、樹脂部材を構成する樹脂には、公知の添加剤が含まれてもよい。 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.
　樹脂部材に含まれる異種材料としては、前記の通り、繊維材料またはフィラー等が挙げられる。繊維材料としては、アラミド繊維、ナイロン繊維、ポリエステル繊維、ガラス繊維、カーボン繊維等が挙げられるが特に限定されない。これら繊維材料は、１種類のみを用いてもよいし２種類以上を適宜組み合わせて用いてもよい。フィラーは、粒子状または粉体状であればよいが、短繊維状であってもよい。繊維材料をフィラーと見なす場合もある。具体的なフィラーとしては、シリカ、ケイ酸塩、粘土類、石膏、アルミナ、二酸化チタン、タルク、カーボンブラック等の無機フィラーを挙げることができるが、特に限定されない。 As described above, the dissimilar material contained in the resin member includes a fiber material or a filler. Examples of 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.
　このように、本開示に係る冷媒圧縮機１００においては、密閉容器１０１内の部材に樹脂部材が含まれ、この樹脂部材に含まれるオリゴマー量は、当該樹脂部材の全重量の２．５重量％以下であるとともに、密閉容器１０１内に貯留される潤滑油１０３は、４０℃での動粘度が０．１ｍｍ2 ／ｓ～５．１ｍｍ2 ／ｓの範囲内であり、かつ、引火点が１１０℃以上である。これにより、密閉容器１０１内の樹脂部材のオリゴマー量を限定するとともに、動粘度が前記の範囲内に入り、かつ、引火点の下限が前記値となる潤滑油１０３を用いていることになる。 As described above, in the refrigerant compressor 100 according to the present disclosure, the member in the sealed container 101 includes the resin member, and the amount of the oligomer included in the resin member is 2.5% by weight of the total weight of the resin member. together with the following it, lubricating oil 103 is stored in hermetic container 101, the kinematic viscosity at 40 ° C. in the range of 0.1mm 2 /s~5.1mm 2 / s, and the flash point 110 It is above ℃. As a result, the amount of oligomer of the resin member in the sealed container 101 is limited, the lubricating oil 103 having a kinematic viscosity within the above range and a lower limit of the flash point is the above value.
　低粘度の潤滑油であっても引火点が相対的に高ければ、樹脂部材に潤滑油１０３が浸透しにくくなるため、樹脂部材からオリゴマーが抽出されにくくなる。そのため、低粘度の潤滑油１０３を用いても、従来よりもオリゴマー量が相対的に多い樹脂部材を用いることが可能になるとともに、オリゴマーの抽出に由来する吸入リードのシール性低下、あるいは、キャピラリーチューブの閉塞等が発生する可能性を有効に抑制することができる。その結果、低粘度の潤滑油１０３を用いた場合であっても冷媒圧縮機１００の信頼性を良好なものとすることができる。 Even if the lubricating oil has a low viscosity, if the flash point is relatively high, the lubricating oil 103 is less likely to penetrate into the resin member, so that it is difficult for the oligomer to be extracted from the resin member. Therefore, even when the low-viscosity lubricating oil 103 is used, it is possible to use a resin member having a relatively large amount of oligomer as compared with the conventional one, and the sealing performance of the suction lead resulting from the extraction of the oligomer is reduced. It is possible to effectively suppress the possibility of tube clogging. As a result, the reliability of the refrigerant compressor 100 can be improved even when the low-viscosity lubricating oil 103 is used.
　なお、本実施の形態１では、冷媒圧縮機１００は、電動要素１０６が圧縮要素１０７の上方に配置された構成を有するものであるが、本開示に係る冷媒圧縮機は、電動要素１０６が圧縮要素１０７の下方に配置された構成を有するものであってもよいことは言うまでもない。本開示が適用可能な冷媒圧縮機は、前述した潤滑油１０３を用いることが可能な構成であれば、本実施の形態１で説明する作用効果と同様の作用効果を得ることができる。 In the first embodiment, the refrigerant compressor 100 has a configuration in which the electric element 106 is disposed above the compression element 107. However, in the refrigerant compressor according to the present disclosure, 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.
　また、本実施の形態１では、冷媒圧縮機１００は、前記の通りレシプロ式（往復動式）であるが、本開示に係る冷媒圧縮機は、レシプロ式に限定されず、回転式、スクロール式、振動式等のように、公知の他の構成であってもよいことは言うまでもない。本開示が適用可能な冷媒圧縮機は、密閉容器１０１内の部材に樹脂部材が含まれ、かつ、前述した潤滑油１０３を用いることが可能な構成であれば、本実施の形態１で説明する作用効果と同様の作用効果を得ることができる。 In Embodiment 1, 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 will be described in the first embodiment as long as the member in the sealed container 101 includes a resin member and the above-described lubricating oil 103 can be used. The same effect as the effect can be obtained.
　また、本実施の形態１では、冷媒圧縮機１００は、商用電源によって駆動されるものであるが、本開示に係る冷媒圧縮機は、これに限定されず、例えば、複数の運転周波数でインバータ駆動されるものであってもよい。冷媒圧縮機がこのような構成であっても、密閉容器１０１内の部材に樹脂部材が含まれ、かつ、前述した潤滑油１０３を用いることで、良好な潤滑性が実現できる。それゆえ、各摺動部に給油量が少なくなるような低速運転時、あるいは、電動要素の回転数が増加する高速運転時においても、冷媒圧縮機の信頼性を向上させることができる。 In the first embodiment, the refrigerant compressor 100 is driven by a commercial power supply. However, 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, the resin member is included in the member in the hermetic container 101, and good lubricity can be realized by using the above-described lubricating oil 103. 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.
　（実施の形態２）
　本実施の形態２では、前記実施の形態１で説明した冷媒圧縮機１００を備える冷凍装置の一例について、図２を参照して具体的に説明する。図２は、前記実施の形態１に係る冷媒圧縮機１００を備える冷凍装置２００の概略構成を模式的に示している。そのため、本実施の形態２では、冷凍装置２００の基本構成の概略についてのみ説明するが、冷凍装置２００の具体的構成はこれに限定されないことはいうまでもない。 (Embodiment 2)
In the second embodiment, an example of a refrigeration apparatus including the refrigerant compressor 100 described in the first embodiment will be specifically described with reference to FIG. 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.
　図２に示すように、本実施の形態２に係る冷凍装置２００は、本体２０６、区画壁２０９、および冷媒回路２０１（冷凍サイクル）等を備えている。本体２０６は、断熱性の箱体および扉体等により構成されており、箱体はその一面が開口した構成であり、扉体は箱体の開口を開閉する構成である。本体２０６の内部は、区画壁２０９により物品の貯蔵空間２０７と機械室２０８とに区画される。貯蔵空間２０７内には、図示しない送風機が設けられている。なお、本体２０６の内部は、貯蔵空間２０７および機械室２０８以外の空間等に区画されてもよい。 2, the refrigeration apparatus 200 according to the second embodiment 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.
　冷媒回路２０１（冷凍サイクル）は、貯蔵空間２０７内を冷却する構成であり、例えば、前記実施の形態１で説明した冷媒圧縮機１００と、放熱器２０２と、減圧装置２０３と、吸熱器２０４とを備え、これらが環状に配管２０５で接続された構成となっている。吸熱器２０４は、貯蔵空間２０７内に配置されている。吸熱器２０４の冷却熱は、図２の破線の矢印で示すように、図示しない送風機によって貯蔵空間２０７内を循環するように撹拌される。これにより貯蔵空間２０７内は冷却される。 The refrigerant circuit 201 (refrigeration cycle) is configured to cool the interior of the storage space 207. For example, the refrigerant compressor 100, the radiator 202, the decompressor 203, and the heat absorber 204 described in the first embodiment. These are annularly connected by a pipe 205. 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.
　このように、本実施の形態２に係る冷凍装置２００は、前記実施の形態１に係る冷媒圧縮機１００を含む冷媒回路２０１を備えている。冷媒圧縮機１００は、前記実施の形態１で説明したように、低粘度かつ高引火点の潤滑油１０３を用いているので、高効率化されたものとなっている。 As described above, the refrigeration apparatus 200 according to the second embodiment includes the refrigerant circuit 201 including the refrigerant compressor 100 according to the first embodiment. As described in 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.
　しかも、このような低粘度かつ高引火点の潤滑油１０３であれば、冷媒圧縮機１００の密閉容器１０１内に収容される樹脂部材に浸透しにくいため、樹脂部材からオリゴマーを抽出しにくくなる。そのため、抽出されたオリゴマーに由来する吸入リードのシール性低下、あるいは、キャピラリーチューブの閉塞等が発生する可能性を有効に抑制することができる。これにより冷媒圧縮機１００の信頼性を向上することができる。 Moreover, such a low-viscosity and high-flash-point lubricating oil 103 is difficult to penetrate into the resin member housed in the sealed container 101 of the refrigerant compressor 100, and thus it is difficult to extract the oligomer from the resin member. Therefore, it is possible to effectively suppress the possibility of a decrease in the sealing performance of the suction lead derived from the extracted oligomer, or the clogging of the capillary tube. Thereby, the reliability of the refrigerant compressor 100 can be improved.
　このように、本実施の形態２に係る冷凍装置２００は、消費電力を低減することができるので、省エネルギー化を実現することができるとともに、信頼性も向上させることができる。 Thus, since the refrigeration apparatus 200 according to Embodiment 2 can reduce power consumption, it can achieve energy saving and improve reliability.
　なお、本実施の形態２で説明した冷凍装置２００は、本開示に係る冷凍装置（本開示に係る冷媒圧縮機を備える冷凍装置）の一例であり、本開示は、この冷凍装置２００に限定されないことはいうまでもない。本開示に係る冷凍装置としては、例えば、冷蔵庫（家庭用、業務用）、除湿器、ショーケース、製氷機、ヒートポンプ式給湯機、ヒートポンプ式洗濯乾燥機、自動販売機、エアーコンディショナー等を挙げることができる。 Note that 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.
　なお、本発明は前記実施の形態の記載に限定されるものではなく、特許請求の範囲に示した範囲内で種々の変更が可能であり、異なる実施の形態や複数の変形例にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施の形態についても本発明の技術的範囲に含まれる。 It should be noted that the present invention is not limited to the description of the above-described embodiment, and various modifications are possible within the scope shown in the scope of the claims, and are disclosed in different embodiments and a plurality of modifications. Embodiments obtained by appropriately combining the technical means are also included in the technical scope of the present invention.
　また、上記説明から、当業者にとっては、本発明の多くの改良や他の実施形態が明らかである。従って、上記説明は、例示としてのみ解釈されるべきであり、本発明を実行する最良の態様を当業者に教示する目的で提供されたものである。本発明の精神を逸脱することなく、その構造及び／又は機能の詳細を実質的に変更できる。 Also, from the above description, many improvements and other embodiments of the present invention will be apparent to those skilled in the art. Accordingly, the foregoing description should be construed as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode of carrying out the invention. The details of the structure and / or function may be substantially changed without departing from the spirit of the invention.
　本発明は、低粘度の潤滑油を用いる冷媒圧縮機と、このような冷媒圧縮機を用いた冷凍装置の分野に広く好適に用いることができる。 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.
１００　　冷媒圧縮機
１０１　　密閉容器
１０２　　冷媒ガス
１０３　　潤滑油
１０４　　固定子
１０５　　回転子
１０６　　電動要素
１０７　　圧縮要素
１２５　　サクションマフラー（樹脂部材）
１２７　　クラスタ（樹脂部材）
２００　　冷凍装置
２０１　　冷媒回路
２０２　　放熱器
２０３　　減圧装置
２０４　　吸熱器
２０５　　配管
  DESCRIPTION OF SYMBOLS 100 Refrigerant compressor 101 Airtight container 102 Refrigerant gas 103 Lubricating oil 104 Stator 105 Rotor 106 Electric element 107 Compression element 125 Suction muffler (resin member)
127 Cluster (resin member)
200 Refrigerating Device 201 Refrigerant Circuit 202 Radiator 203 Decompressor 204 Heat Absorber 205 Piping

Claims (8)

  1. 　密閉容器内に収容され、冷媒を圧縮する圧縮要素と、当該圧縮要素を駆動する電動要素とを備え、
    　前記密閉容器内には潤滑油が貯留されるとともに、当該密閉容器内に収容される部材には樹脂部材が含まれ、
    　前記樹脂部材は、当該樹脂部材に含まれるオリゴマー量が、当該樹脂部材の全重量の２．５重量％以下のものであり、
    　前記潤滑油は、４０℃での動粘度が０．１ｍｍ2 ／ｓ～５．１ｍｍ2 ／ｓの範囲内であり、かつ、引火点が１１０℃以上であることを特徴とする、
    密閉型冷媒圧縮機。     A compression element that is housed in a sealed container and compresses the refrigerant; and an electric element that drives the compression element;
    Lubricating oil is stored in the sealed container, and the member accommodated in the sealed container includes a resin member,
    In the resin member, the amount of oligomer contained in the resin member is 2.5% by weight or less of the total weight of the resin member,
    The lubricating oil is in the range kinematic viscosity of 0.1mm 2 /s~5.1mm 2 / s at 40 ° C., and wherein the flash point is 110 ° C. or higher,
    Hermetic refrigerant compressor.
  2. 　前記オリゴマー量は、前記樹脂部材の全重量の０．０１～１重量％の範囲内であることを特徴とする、
    請求項１に記載の密閉型冷媒圧縮機。     The oligomer amount is in the range of 0.01 to 1% by weight of the total weight of the resin member,
    The hermetic refrigerant compressor according to claim 1.
  3. 　前記オリゴマーは、２量体、３量体、および４量体の単体もしくは少なくともいずれか一つ以上を含むことを特徴とする、
    請求項１または２に記載の密閉型冷媒圧縮機。     The oligomer includes a dimer, a trimer, and a tetramer alone or at least one of them.
    The hermetic refrigerant compressor according to claim 1 or 2.
  4. 　前記潤滑油には、添加剤として少なくとも安定剤が、前記潤滑油全量の０．１～１０重量％の範囲内の含有量で添加されていることを特徴とする、
    請求項１から３のいずれか１項に記載の密閉型冷媒圧縮機。     The lubricating oil is characterized in that at least a stabilizer is added as an additive in a content within a range of 0.1 to 10% by weight of the total amount of the lubricating oil.
    The hermetic refrigerant compressor according to any one of claims 1 to 3.
  5. 　前記安定剤が、酸捕捉剤およびフラーレンの少なくとも一方であることを特徴とする、
    請求項４に記載の密閉型冷媒圧縮機。     Wherein the stabilizer is at least one of an acid scavenger and a fullerene,
    The hermetic refrigerant compressor according to claim 4.
  6. 　前記安定剤がフラーレンであれば、その含有量は、前記潤滑油全量の０．１～５重量％の範囲内であることを特徴とする、
    請求項５に記載の密閉型冷媒圧縮機。     If the stabilizer is fullerene, its content is in the range of 0.1 to 5% by weight of the total amount of the lubricating oil,
    The hermetic refrigerant compressor according to claim 5.
  7. 　前記樹脂部材の密度は１．２～３．０ｇ／ｃｍ3 の範囲内であることを特徴とする、
    請求項１から６のいずれか１項に記載の密閉型冷媒圧縮機。     The resin member has a density in the range of 1.2 to 3.0 g / cm 3 ,
    The hermetic refrigerant compressor according to any one of claims 1 to 6.
  8. 　請求項１から７のいずれか１項に記載の密閉型冷媒圧縮機を備えていることを特徴とする、冷凍装置。
          A refrigeration apparatus comprising the hermetic refrigerant compressor according to any one of claims 1 to 7.
PCT/JP2018/016910 2017-04-28 2018-04-26 Hermetically sealed refrigerant compressor and refrigeration device using same WO2018199206A1 (en)

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EP18790900.7A EP3617503A1 (en) 2017-04-28 2018-04-26 Hermetically sealed refrigerant compressor and refrigeration device using same
CN201880028216.5A CN110573733A (en) 2017-04-28 2018-04-26 Hermetic refrigeration compressor and refrigeration device comprising same
US16/609,072 US20200149520A1 (en) 2017-04-28 2018-04-26 Sealed refrigerant compressor and refrigeration device including same
JP2019514599A JPWO2018199206A1 (en) 2017-04-28 2018-04-26 Hermetic refrigerant compressor and refrigeration device using the same

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