EP2024468A1 - Compresseur hermétique et système de réfrigération - Google Patents
Compresseur hermétique et système de réfrigérationInfo
- Publication number
- EP2024468A1 EP2024468A1 EP08751637A EP08751637A EP2024468A1 EP 2024468 A1 EP2024468 A1 EP 2024468A1 EP 08751637 A EP08751637 A EP 08751637A EP 08751637 A EP08751637 A EP 08751637A EP 2024468 A1 EP2024468 A1 EP 2024468A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hermetic compressor
- oil
- refrigeration
- refrigerant
- refrigeration oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 88
- 239000003921 oil Substances 0.000 claims abstract description 49
- -1 carboxylic acid ester compound Chemical class 0.000 claims abstract description 31
- 125000002723 alicyclic group Chemical group 0.000 claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- 125000004185 ester group Chemical group 0.000 claims abstract description 17
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 14
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 14
- 239000002199 base oil Substances 0.000 claims abstract description 7
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 5
- 239000003507 refrigerant Substances 0.000 claims description 58
- 230000006835 compression Effects 0.000 claims description 23
- 238000007906 compression Methods 0.000 claims description 23
- 230000007246 mechanism Effects 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 12
- 239000004962 Polyamide-imide Substances 0.000 claims description 9
- 239000010696 ester oil Substances 0.000 claims description 9
- 229920002312 polyamide-imide Polymers 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 8
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 8
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 6
- 229930195729 fatty acid Natural products 0.000 claims description 6
- 239000000194 fatty acid Substances 0.000 claims description 6
- 150000004665 fatty acids Chemical class 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 6
- 229920000459 Nitrile rubber Polymers 0.000 claims description 5
- 229910001060 Gray iron Inorganic materials 0.000 claims description 4
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 4
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000005191 phase separation Methods 0.000 claims description 4
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 claims description 4
- 229920002530 polyetherether ketone Polymers 0.000 claims description 4
- 239000011112 polyethylene naphthalate Substances 0.000 claims description 4
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 3
- 239000005069 Extreme pressure additive Substances 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000003963 antioxidant agent Substances 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229920003055 poly(ester-imide) Polymers 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000004088 foaming agent Substances 0.000 claims description 2
- 235000000396 iron Nutrition 0.000 claims description 2
- 239000012188 paraffin wax Substances 0.000 claims description 2
- 238000005255 carburizing Methods 0.000 claims 1
- 229920001973 fluoroelastomer Polymers 0.000 claims 1
- 238000005121 nitriding Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 239000011368 organic material Substances 0.000 abstract description 21
- 230000016571 aggressive behavior Effects 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 description 13
- 230000007423 decrease Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000008961 swelling Effects 0.000 description 6
- 229910019142 PO4 Inorganic materials 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 5
- 239000010452 phosphate Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 150000001733 carboxylic acid esters Chemical class 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 125000000582 cycloheptyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 2
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
- C10M105/32—Esters
- C10M105/36—Esters of polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
- C10M171/008—Lubricant compositions compatible with refrigerants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
- C10M2207/2825—Esters of (cyclo)aliphatic oolycarboxylic acids used as base material
-
- 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
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/09—Characteristics associated with water
- C10N2020/097—Refrigerants
- C10N2020/101—Containing Hydrofluorocarbons
-
- 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
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/30—Refrigerators lubricants or compressors lubricants
Definitions
- the present invention relates to a hermetic compressor and a refrigeration system using a refrigerant whose main component is a hydrofluorocarbon refrigerant and whose critical temperature is 40 degrees centigrade or higher.
- chlorofluorocarbon 12 used as a refrigerant of a refrigeration system such as a refrigerator or dehumidifier is also a control subject.
- hydrofluorocarbon (HFC) refrigerants which do not destroy the ozone layer and whose ozone depletion potential is 0.
- HFC- 134a A representative refrigerant is HFC- 134a.
- a conventional hermetic compressor and a conventional refrigeration system using HFC- 134a use a refrigeration oil whose base oil is an alicyclic multivalent carboxylic acid ester compound. The techniques are disclosed in, for example, Patent Citation 1.
- FIG. 6 is a configuration diagram of a conventional refrigeration system.
- a refrigeration system is constructed by connecting hermetic compressor 1, condenser 2, expansion mechanism 3, and evaporator 4 with pipes in order.
- a refrigerant is sealed.
- FIG. 7 is a vertical cross-sectional view of the hermetic compressor.
- hermetic compressor 1 houses, in hermetic container 5, compression element 6, electric element 7 for driving compression element 6, and refrigeration oil 8 for sliding lubrication of hermetic compressor 1 and sealing of a compression chamber.
- hermetic compressor 1 electric element 7 drives compression element 6, thereby compressing a low-temperature low-pressure gaseous refrigerant.
- the resultant refrigerant is discharged as a high-temperature high-pressure gaseous refrigerant and sent to condenser 2.
- the gaseous refrigerant sent to condenser 2 becomes a high- temperature high-pressure liquid refrigerant while emitting its heat into the air, and the high-temperature high-pressure liquid refrigerant is sent to expansion mechanism 3.
- the high-temperature high-pressure liquid refrigerant passing through expansion mechanism 3 becomes a low-temperature low-pressure wet steam by a diaphragm effect, and the low-temperature low-pressure wet stream is sent to evaporator 4.
- the refrigerant in evaporator 4 absorbs heat from the environment and evaporates.
- the refrigerant on the low-temperature low-pressure gas from evaporator 4 is sucked by hermetic compressor 1. After that, the same
- HFC- 134a is used as the refrigerant.
- the kinetic viscosity of the HFC- 134a is 2 to 70 cSt at 40 degrees centigrade, and 1 to 9 cSt at 100 degrees centigrade.
- the HFC- 134a has at least two ester groups in the molecule. At least two ester groups are bound to carbon atoms adjacent to each other on an alicyclic ring.
- refrigeration oil 8 is also employed. Refrigeration oil 8 uses, as a base oil, an alicyclic multivalent carboxylic acid ester compound whose carbon number is 1 to 30 among hydrocarbon radicals bound to at least two ester groups.
- the lower critical temperature of refrigeration oil 8 is 0 degree or less or - 30 degrees centigrade or lower. Consequently, also in the case of using the HFC- 134a in a low-temperature refrigeration system such as a refrigerator, refrigeration oil 8 and the refrigerant are very compatible without being separated from each other over the whole temperature range of the use environment. Therefore, the refrigerant heat transmitting performance and reliability of a lubricating oil film between the shaft of hermetic compressor 1 and the bearing and a heat exchanger can be remarkably improved.
- Patent Citation 1 Patent 2002-356691 Disclosure of Invention The present invention provides a very reliable hermetic compressor and refrigeration system by suppressing aggression of a refrigeration oil to an organic material.
- the ratio of the carbon number of the hydrocarbon radical bound to the ester group of the refrigeration oil using the alicyclic multivalent carboxylic acid ester compound as a base oil is controlled.
- FIG. 1 is a vertical cross-sectional view of a hermetic compressor in a first embodiment of the present invention.
- FIG. 2 is a configuration diagram of a refrigeration system in the first embodiment of the present invention.
- FIG. 3 is a diagram showing the relation between the carbon number of a hydrocarbon radical and the swelling ratio of an organic material in the first embodiment of the present invention.
- FIG. 4 is a vertical cross-sectional view of a hermetic compressor in a second embodiment of the present invention.
- FIG. 5 is a configuration diagram of a refrigeration system in the second embodiment of the present invention.
- FIG. 6 is a configuration diagram of a conventional refrigeration system.
- FIG. 7 is a vertical cross-sectional view of a conventional hermetic compressor. Explanation of Reference
- FIG. 1 is a vertical cross-sectional view of a hermetic compressor in a first embodiment of the present invention.
- FIG. 2 is a configuration diagram of a refrigeration system in the first embodiment of the present invention.
- hermetic compressor 101 accumulates, in hermetic container 102, refrigeration oil 103 and houses electric element 104 and compression element 105 driven by electric element 104.
- the refrigeration system of the first embodiment is constructed by connecting hermetic compressor 101, condenser 106, expansion mechanism 107, and evaporator 108 with pipes in order.
- Refrigerant 109 is a hydrofluorocarbon refrigerant and sealed in the refrigeration system of the first embodiment.
- hermetic compressor 101 The operation and action of hermetic compressor 101 and the refrigeration system constructed as described above will be explained below.
- hermetic compressor 101 when electric element 104 drives compression element 105, low-temperature low-pressure gaseous refrigerant 109 is sucked into compression chamber 111 via suction muffler 110 as a muffler and compressed in compression chamber 111. The resultant refrigerant is discharged as high-temperature high-pressure gaseous refrigerant 109 from compression chamber 111. Discharged refrigerant 109 is led to the outside of hermetic compressor 101 via D line 112 that attenuates ripples and sent to condenser 106. Gaseous refrigerant 109 sent to condenser 106 becomes high- temperature high-pressure liquid refrigerant 109 while emitting its heat into the air, and the high-temperature high-pressure liquid refrigerant is sent to expansion mechanism 107.
- crankshaft 113 press-fixed to electric element 104 rotates, and eccentric motion of eccentric shaft 114 of crankshaft 113 is transmitted from connecting rod 115 as a coupling part to piston 117 via piston pin 116.
- Piston 117 reciprocates in cylindrical bore 119 formed in block 118 and compresses refrigerant 109 in compression chamber 111 in an opening/closing process of valve 120.
- expansion mechanism 107 a capillary tube having a diameter of 0.6 mm is used. High-temperature high-pressure liquid refrigerant 109 passing through expansion mechanism 107 is rapidly decompressed, thereby becoming low-temperature low- pressure liquid refrigerant 109.
- Liquid refrigerant 109 is sent to evaporator 108 and becomes low-temperature low-pressure gaseous refrigerant 109 while absorbing heat in the air. Further, gaseous refrigerant 109 is sent to hermetic compressor 101. In such a manner, the operation of the refrigerating cycle is performed.
- HFC- 134a as a hydrofluorocarbon refrigerant is used as refrigerant 109.
- base oil of refrigeration oil 103 an alicyclic multivalent carboxylic acid ester compound having a kinetic viscosity at 40 degrees centigrade of 2 to 70 cSt, and at 100 degrees centigrade of 1 to 9 cSt is chosen. It was confirmed that there is no problem in performance and reliability of hermetic compressor 101 when the kinetic viscosity is thus chosen.
- the two-phase separation temperature between the alicyclic multivalent carboxylic acid ester compound and the hydrofluorocarbon refrigerant is -35 degrees centigrade or lower at lower critical temperature and 70 degrees centigrade or higher at upper critical temperature. Therefore, the two-phase separation does not occur at a temperature higher than -35 degrees centigrade of the evaporator temperature and equal to or lower than 70 degrees centigrade of the condenser temperature. Therefore, refrigeration oil 103 does not reside and a very reliable system is provided as a refrigeration system.
- the alicyclic multivalent carboxylic acid ester compound used for refrigeration oil 103 has an alicyclic ring and at least two ester groups expressed by the following general formula (1). At least two ester groups are bound to carbon atoms adjacent to each other on the alicyclic ring. -COORl (1) where Rl denotes a hydrocarbon radical.
- Examples of the alicyclic rings may include cyclopentane ring, cyclohexane ring, cyc- loheptane ring, and the like. After making examinations, it was understood that the cyclohexane ring is preferable.
- the alicyclic carboxylic acid ester compound whose aggression to the organic material is suppressed can be obtained.
- FIG. 3 is a diagram showing the relation between the carbon number of a hydrocarbon radical and the swelling ratio of an organic material in the first embodiment of the present invention.
- Cl, C4, C8 and C9 denotes a hydrocarbon radical whose carbon number is 1, 4, 8 and 9, respectively, and content ratio is the ratio of Cl, C4, C8 and C9 among all hydrocarbon radicals.
- FIG. 3 shows the result of evaluation of a shield tube test between HFC- 134a and refrigeration oil 103.
- a life test was conducted in a refrigeration system constructed by hermetic compressor 101, condenser 106, expansion mechanism 107, and evaporator 108.
- conventional refrigeration oil 103 an alicyclic carboxylic acid ester compound of 25% by weight in which the carbon number of Rl is 4 was used.
- refrigeration oil 103 of the hermetic compressor in the first embodiment an alicyclic multivalent carboxylic acid ester compound in which the ratio that the carbon number of Rl is 4 or less is 15% by weight was used.
- an upper-layer polyamide- imide/lower-layer polyester imide ( AFEI) copper wire was used as an enameled copper wire of electric element 104.
- AFEI upper-layer polyamide- imide/lower-layer polyester imide
- As an insulating film polyethylene terephthalate was used.
- Low-oligomer polyethylene terephthalate was used for suction muffler 110 of compression element 105.
- Nitrile rubber was used as vibration-proof rubber 121 used for preventing D line 112 from being vibrated as a rubber part used in hermetic container 102.
- the capillary flow decrease ratio could be reduced to 1/6 of the conventional one, and no generation of a sludge was recognized on valve 120.
- monoester was added by 5 to 30% by weight. Consequently, without increasing the ratio that the carbon number of Rl is 4 or less, the kinetic viscosity can be easily lowered, and aggression to an organic material when the viscosity of refrigeration oil 103 is low can be suppressed.
- the upper-layer polyamide-imide/lower-layer polyester imide (AI/EI) copper wire was used as an enameled copper wire in electric element 104 of hermetic compressor 101, and polyethylene terephthalate was used as an insulating film.
- AI/HPE upper-layer polyamide-imide / lower-layer modified polyester
- the capillary flow decrease ratio could be reduced to 1/6 of conventional one.
- refrigeration oil 103 containing an additive was evaluated.
- a forming agent, antioxidant agent, and extreme-pressure additive agent were used as the additives and the capillary flow decrease ratio in the life test was recognized.
- 20 to 100 ppm of di- methylsiloxane having a kinetic viscosity of 40 to 100 cSt as the foaming agent, 0.05 to 0.2 wt% of dibutyl paracresol (DBPC) as the antioxidant agent, and 0.05 to 0.3 wt% of trecresyl phosphate (TCP) as the extreme-pressure additive agent were added.
- the capillary flow decrease ratio was 5% or less, and it could be confirmed that there is no problem in sound and sliding.
- the sliding part of hermetic compressor 101 was evaluated by an environment abrasion tester in a state where refrigerant 109 and refrigeration oil 103 coexist.
- Gray cast iron FC-200 was used as the material of block 118
- spheroidal graphite cast iron was used as the material of crankshaft 113
- a sintered metal whose hardness is HRB70 was used as the material of piston 117
- high-silicon aluminum ADC 14 was used as the material of connecting rod 115
- chrome molybdenum steel SCM415 was used as the material of piston pin 116. Since cast metals are easily adhered to each other because they are metals of the same kind, phosphate coating process is performed on one of the metals to address sliding of the cast metals.
- the wear amount due to sliding was 5 mm or less in any of combinations of gray cast irons FC-200 (one-side phosphate coating process), FC-200 (surface phosphate coating process) and FCD-500, FC-200 and FCD-500 (surface phosphate coating process), FC-200 and a sintered metal, FC-200 and ADC14, FDC-500 and ADC 14, and ADC- 14 and carburized SCM415. It could be confirmed that there is no problem.
- FIG. 4 is a vertical cross-sectional view of a hermetic compressor in a second embodiment of the present invention.
- FIG. 5 is a configuration diagram of a refrigeration system in the second embodiment of the present invention.
- hermetic compressor 201 accumulates, in hermetic container 202, refrigeration oil 203 and houses electric element 204 and compression element 205 driven by electric element 204.
- the refrigeration system of the second embodiment is constructed by connecting hermetic compressor 201, condenser 206, expansion mechanism 207, and evaporator
- Refrigerant 209 is a hydrofluorocarbon refrigerant and sealed in the refrigeration system of the second embodiment.
- hermetic compressor 201 The operation and action of hermetic compressor 201 and the refrigeration system constructed as described above will be explained below.
- hermetic compressor 201 when electric element 204 drives compression element 205, low-temperature low-pressure gaseous refrigerant 209 is sucked into compression chamber 211 via suction muffler 210 as a muffler and compressed in compression chamber 211. The resultant refrigerant is discharged as high-temperature high-pressure gaseous refrigerant 209 from compression chamber 111. Discharged refrigerant 209 is sent to condenser 206. It becomes high-temperature high-pressure liquid refrigerant
- expansion mechanism 207 a capillary tube having a diameter of 0.6 mm is used. High-temperature high-pressure liquid refrigerant 209 passing through expansion mechanism 207 is rapidly decompressed, thereby becoming low-temperature low- pressure liquid refrigerant 209. Liquid refrigerant 209 is sent to evaporator 208 and becoming low-temperature low-pressure gaseous refrigerant 209 while absorbing heat in the air. Further, gaseous refrigerant 209 is sent to hermetic compressor 201. In such a manner, the operation of the refrigerating cycle is performed.
- HFC- 134a as a hydrofluorocarbon refrigerant is used as refrigerant 209.
- an alicyclic multivalent carboxylic acid ester compound whose kinetic viscosity is 2 to 70 cSt at 40 degrees centigrade, and 1 to 9 cSt at 100 degrees centigrade and whose two-phase separation temperature is -35 degrees centigrade or lower at the lower critical temperature and is 70 degrees centigrade or higher at the upper critical temperature is used. That is, refrigeration oil having an alicyclic ring and at least two ester groups expressed by the above general formula (1), the at least two ester groups bound to carbon atoms adjacent to each other on the alicyclic ring, is used.
- Examples of the alicyclic rings may include cyclopentane ring, cyclohexane ring, cyc- loheptane ring, and the like. After examinations, it was understood that the cyclohexane ring is preferable.
- hermetic compressor and the refrigeration system of the present invention aggression to an organic material can be suppressed.
- the high-reliable hermetic compressor and the refrigeration system can be provided and the invention can be widely applied to devices each using a refrigeration system.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Emergency Medicine (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compressor (AREA)
- Lubricants (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007125339 | 2007-05-10 | ||
PCT/JP2008/001112 WO2008142829A1 (fr) | 2007-05-10 | 2008-04-28 | Compresseur hermétique et système de réfrigération |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2024468A1 true EP2024468A1 (fr) | 2009-02-18 |
Family
ID=39638940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08751637A Withdrawn EP2024468A1 (fr) | 2007-05-10 | 2008-04-28 | Compresseur hermétique et système de réfrigération |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100170291A1 (fr) |
EP (1) | EP2024468A1 (fr) |
KR (1) | KR20090010211A (fr) |
CN (1) | CN101541932A (fr) |
WO (1) | WO2008142829A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101955668A (zh) * | 2010-09-30 | 2011-01-26 | 广东美的电器股份有限公司 | 用于制作空调压缩机消音器的复合材料 |
TWI586927B (zh) * | 2016-01-13 | 2017-06-11 | De-Feng Xie | Refrigeration System Replacement Device for Closed Oil in Fully Sealed Compressor |
CN105571207B (zh) * | 2016-02-19 | 2017-11-03 | 厦门松芝汽车空调有限公司 | 一种电车空调用压缩机组 |
WO2017187828A1 (fr) * | 2016-04-28 | 2017-11-02 | 東芝キヤリア株式会社 | Compresseur hermétique et dispositif à cycle de réfrigération |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2967574B2 (ja) * | 1990-11-16 | 1999-10-25 | 株式会社日立製作所 | 冷凍装置 |
US5514922A (en) * | 1993-02-08 | 1996-05-07 | Sanden Corporation | Hermetic motor driven fluid apparatus having improved insulating structure |
JPH09222083A (ja) * | 1996-02-16 | 1997-08-26 | Matsushita Electric Ind Co Ltd | 冷凍サイクルと圧縮機 |
WO2000060021A1 (fr) * | 1999-04-06 | 2000-10-12 | Matsushita Refrigeration Company | Composition refrigerante, compresseur electrique ferme et refrigerateur |
JP4682441B2 (ja) * | 2001-05-07 | 2011-05-11 | パナソニック株式会社 | 密閉型電動圧縮機 |
JP2002356691A (ja) * | 2001-05-31 | 2002-12-13 | Matsushita Refrig Co Ltd | 冷凍装置 |
KR100483556B1 (ko) * | 2002-09-17 | 2005-04-15 | 삼성광주전자 주식회사 | 밀폐형 압축기의 케이스 |
US7029242B2 (en) * | 2003-11-14 | 2006-04-18 | Tecumseh Products Company | Hermetic compressor with one-quarter wavelength tuner |
-
2008
- 2008-04-28 CN CNA2008800002461A patent/CN101541932A/zh active Pending
- 2008-04-28 KR KR1020087028447A patent/KR20090010211A/ko not_active Application Discontinuation
- 2008-04-28 US US12/297,706 patent/US20100170291A1/en not_active Abandoned
- 2008-04-28 WO PCT/JP2008/001112 patent/WO2008142829A1/fr active Application Filing
- 2008-04-28 EP EP08751637A patent/EP2024468A1/fr not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2008142829A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR20090010211A (ko) | 2009-01-29 |
WO2008142829A1 (fr) | 2008-11-27 |
US20100170291A1 (en) | 2010-07-08 |
CN101541932A (zh) | 2009-09-23 |
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