CN107044739A - Refrigerator, the manufacture method of refrigerator and the method for improving COP - Google Patents

Refrigerator, the manufacture method of refrigerator and the method for improving COP Download PDF

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Publication number
CN107044739A
CN107044739A CN201710060845.3A CN201710060845A CN107044739A CN 107044739 A CN107044739 A CN 107044739A CN 201710060845 A CN201710060845 A CN 201710060845A CN 107044739 A CN107044739 A CN 107044739A
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refrigerant
refrigerator
refrigerator oil
viscosity
mass
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CN201710060845.3A
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CN107044739B (en
Inventor
山口健太郎
大城户武
尾形英俊
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Eneos Corp
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JX Nippon Oil and Energy Corp
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    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
    • C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
    • C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
    • C09K5/045—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds containing only fluorine as halogen
    • 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
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
    • C09K2205/10—Components
    • C09K2205/12—Hydrocarbons
    • C09K2205/122—Halogenated hydrocarbons
    • 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
    • C10M2211/00—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2211/02—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions containing carbon, hydrogen and halogen only
    • C10M2211/022—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions containing carbon, hydrogen and halogen only aliphatic
    • 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
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/001—Charging refrigerant to a cycle

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Lubricants (AREA)

Abstract

The present invention provides a kind of refrigerator 10, above-mentioned refrigerator 10 possesses the refrigerant-cycle systems 6 with compressor 1, condenser 2, expansion gear 3 and evaporator 4, refrigerant and refrigerator oil are filled with the refrigerant-cycle systems 6, the working fluid being made up of refrigerant and refrigerator oil temperature be 80 DEG C, absolute pressure be to show 2~4mm under conditions of 3.4MPa2/ s refrigerant dissolving viscosity.

Description

Refrigerator, the manufacture method of refrigerator and the method for improving COP
Technical field
The present invention relates to a kind of refrigerator, the manufacture method of refrigerator and the method for improving COP.
Background technology
Refrigerator possesses the refrigerant-cycle systems with compressor, condenser, expansion gear, evaporator etc..In refrigeration In the agent circulatory system, using the phenomenon for capturing heat during vaporizing liquid from surrounding, the circulation comprised the following steps is repeated：Vapour The compression within the compressor of refrigerant after change and heating, the liquid for the refrigerant realized by exothermic condensation within the condenser Change, the vaporization of the puffing in expansion gear and refrigerant in evaporator.
As the index for the performance for evaluating such refrigerator, the coefficient of performance (COP is often used：Coefficient of Performance).COP represents that refrigerating capacity (also referred to as refrigerating capacity) disappears relative to when running refrigerant-cycle systems etc. The ratio (energy of refrigerating capacity/consumption) of the energy of consumption.In recent years, people expect that the COP of refrigerator is further improved, for example, exist A kind of compressor with integrated expander for the COP that can improve refrigerator is disclosed in JP 2015-94259 publications.
The content of the invention
It is an object of the invention to provide refrigerator excellent a kind of COP and its manufacture method, and improve COP side Method.
The present invention provides a kind of refrigerator, and above-mentioned refrigerator possesses with compressor, condenser, expansion gear and evaporator Deng refrigerant-cycle systems, in refrigerant-cycle systems be filled with refrigerant and refrigerator oil, by refrigerant and refrigerator The working fluid of oil composition is 80 DEG C, under conditions of absolute pressure is 3.4MPa in temperature, shows 2~4mm2/ s refrigerant is molten Solve viscosity.
In the refrigerator, because the refrigerant and refrigerator oil that are filled in refrigerant-cycle systems are aobvious as working fluid Show specific refrigerant dissolving viscosity, therefore, it is possible to improve COP.That is, according to the discussion of the present inventors, distinguish if The refrigerant dissolving viscosity of working fluid is too low, then due to reasons such as sealing reductions, and refrigerating capacity or refrigerating capacity can be reduced, On the other hand, if the refrigerant dissolving viscosity of working fluid is too high, with resistance when stirring resistance or refrigerator startup Increase, consumed energy also increases, in addition, refrigerating capacity or refrigerating capacity can also be reduced.Also, the present inventors send out Now by using be 80 DEG C in temperature, absolute pressure be to show 2~4mm under conditions of 3.4MPa2/ s refrigerant dissolving viscosity Working fluid, it can be ensured that the balance of the suppression to consumed energy and the raising to refrigerating capacity or refrigerating capacity so that COP can be improved.
In addition, the present invention provides a kind of manufacture method of refrigerator, it is filled to possess with compressor, condenser, expansion The manufacture method with the refrigerator of the refrigerant-cycle systems of evaporator is put, the manufacture method of the refrigerator has in refrigerant The process of filling refrigerant and refrigerator oil in the circulatory system, also, the working fluid being made up of refrigerant and refrigerator oil exists Temperature is 80 DEG C, absolute pressure is to show 2~4mm under conditions of 3.4MPa2/ s refrigerant dissolving viscosity.
In addition, the present invention provides a kind of method for the COP for improving refrigerator, the refrigerator possesses with compressor, cold The refrigerant-cycle systems of condenser, expansion gear and evaporator, are filled with refrigerant and refrigerator in refrigerant-cycle systems Oil, by using 2~4mm of display under conditions of 80 DEG C of temperature, absolute pressure 3.4MPa2/ s refrigerant dissolves the work of viscosity Make fluid as the working fluid being made up of refrigerant and refrigerator oil to improve COP.
In accordance with the invention it is possible to a kind of excellent refrigerators of COP and its manufacture method are provided, and the method for improving COP.
Brief description of the drawings
Fig. 1 is the ideograph for an embodiment for representing refrigerator.
Fig. 2 is expression refrigerant dissolving viscosity and the curve map of an example of COP relation.
Embodiment
Below, suitably referring to the drawings, embodiments of the present invention are described in detail.
Fig. 1 is the ideograph for an embodiment for representing refrigerator.As shown in figure 1, refrigerator 10 at least possesses refrigeration The agent circulatory system 6, above-mentioned refrigerant-cycle systems 6 are by compressor (coolant compressor) 1, condenser (gas cooler) 2, swollen Swollen device 3 (capillary, expansion valve etc.), evaporator (heat exchanger) 4 are sequentially connected by stream 5 and obtained.
In refrigerant-cycle systems 6, first, the high temperature sprayed from compressor 1 into stream 5 (is usually 70~120 DEG C) refrigerant be changed into highdensity fluid (supercritical fluid etc.) in condenser 2.Then, refrigerant passes through expansion gear 3 The narrow stream being had is so as to liquefy, and it (is usually -40~0 further to be vaporized in evaporator 4 and be changed into low temperature ℃).The refrigeration carried out by refrigerator 10 seizes the phenomenon of heat around when make use of refrigerant to be vaporized in evaporator 4.
In compressor 1, under the conditions of high temperature (being usually 70~120 DEG C), a small amount of refrigerant and substantial amounts of refrigerator Oil coexists.The refrigerant sprayed into stream 5 from compressor 1 is gas shape, although containing as it is vaporific it is a small amount of (be usually 1 ~10 volume %) refrigerator oil, but a small amount of refrigerant (point a) in Fig. 1 has been dissolved in the vaporific refrigerator oil.
In condenser 2, gasiform refrigerant is compressed into highdensity fluid, relatively-high temperature (be usually 50~ 70 DEG C) under conditions of, (the point b) in Fig. 1 coexists with a small amount of refrigerator oil in substantial amounts of refrigerant.Further, substantial amounts of system The mixture of cryogen and a small amount of refrigerator oil is sent to expansion gear 3 and evaporator 4 and is drastically down to low temperature (generally successively For -40~0 DEG C) (point c, d in Fig. 1), and return compressor 1.
As such refrigerator 10, air conditioner for automobile, dehumidifier, refrigerator, freezing and refrigeration warehouse, automatic selling can be enumerated as Cooling device, house conditioner, packed air conditioner, hot water supply in cargo aircraft, showcase, chemical devices etc. are used Heat pump etc..
In refrigerant-cycle systems 6, as described above, filled with refrigerant and refrigerator oil.As long as make by refrigerant with The working fluid of refrigerator oil composition shows 2~4mm under conditions of 80 DEG C of temperature, absolute pressure 3.4MPa2/ s refrigeration Viscosity is dissolved in agent, and refrigerant is appropriately respectively selected with refrigerator oil.
As refrigerant, saturated fluorohydrocarbons (HFC) refrigerant, unsaturated fluorohydrocarbon (HFO) refrigerant, hydrocarbon refrigeration can be enumerated The fluorine-containing ether series coolants such as agent, perfluoro-ether class, double (trifluoromethyl) sulfide refrigerants, CF3I refrigerant and The nature series coolant such as ammonia (R717), carbon dioxide (R744).
As saturated fluorohydrocarbons refrigerant, the saturated fluorohydrocarbons refrigerant that carbon number is 1~3 is preferably used, is more preferably used Carbon number is 1~2 saturated fluorohydrocarbons refrigerant.Saturated fluorohydrocarbons refrigerant for example can be difluoromethane (R32), fluoroform (R23), pentafluoroethane (R125), 1,1,2,2- HFC-134as (R134), 1,1,1,2- HFC-134as (R134a), 1,1,1- tri- Fluoroethane (R143a), 1,1- Difluoroethanes (R152a), fluoroethane (R161), 1,1,1,2,3,3,3- heptafluoro-propanes (R227ea), 1,1,1,2,3,3- HFC-236fas (R236ea), 1,1,1,3,3,3- HFC-236fas (R236fa), 1,1,1,3,3- Any one in pentafluoropropane (R245fa) and HFC-365 (R365mfc) or two or more mixing Thing.
As the more preferred example of saturated fluorohydrocarbons refrigerant, for example single R32 can be enumerated；Single R23； Single R134a；Single R125；The mass % of mass %/40 of R134a/R32=60~80~20 mixture；R32/R125 The mass % of=40~70 mass %/60~30 mixture；The mass %'s of mass %/60 of R125/R143a=40~60~40 is mixed Compound；The mass % of the mass % of R134a/R32/R125=60 mass %/30/10 mixture；R134a/R32/R125=40~ The mass % of mass %/5 of 70 mass %/15~35~40 mixture；Mass %/1 of R125/R134a/R143a=35~55~ The mass % of 15 mass %/40~60 mixture etc..More specifically, the mixed of R134a/R32=70/30 mass % is preferably used Compound；R32/R125=60/40 mass % mixture；R32/R125=50/50 mass % mixture (R410A)；R32/ R125=45/55 mass % mixture (R410B)；R125/R143a=50/50 mass % mixture (R507C)；R32/ R125/R134a=30/10/60 mass % mixture；R32/R125/R134a=23/25/52 mass % mixture (R407C)；R32/R125/R134a=25/15/60 mass % mixture (R407E)；R125/R134a/R143a=44/4/ 52 mass % mixture (R404A) etc..
As unsaturated fluoro hydrocarbon coolant, the fluoro third that fluorinated ethylene and fluorine number that fluorine number is 3 are 3~5 can be enumerated as Alkene.Unsaturated fluoro hydrocarbon coolant for example can be 1,1,2- trifluoro-ethylenes (HFO-1123), 1,2,3,3,3- pentafluoropropenes (HFO-1225ye), 1,3,3,3- tetrafluoropropenes (HFO-1234ze), 2,3,3,3- tetrafluoropropenes (HFO-1234yf), 1,2,3, In 3- tetrafluoropropenes (HFO-1234ye) and 3,3,3- trifluoro propenes (HFO-1243zf) any one or it is two or more mixed Compound.
As hydrocarbon coolant, the hydrocarbon that carbon number is 1~5 can be enumerated as.As hydrocarbon coolant, for example can for methane, ethene, Ethane, propylene, propane (R290), cyclopropane, normal butane, iso-butane, cyclobutane, methyl cyclopropane, 2- methybutanes, Yi Jizheng Any one in pentane or two or more mixtures.
From being readily obtained more than 80 DEG C and from the viewpoint of more than 3.4MPa high-temperature and high-pressure conditions, refrigerant is preferably comprised Difluoromethane (R32), further preferably difluoromethane (R32) and pentafluoroethane (R125).Refrigerant is in difluoromethane or difluoro Methane is with beyond pentafluoroethane, can also further contain above-mentioned refrigerant.With difluoromethane or difluoromethane and five fluorine second The refrigerant that alkane is used in conjunction with preferably is 1,1,1,2- HFC-134as (R134a), 2,3,3,3- tetrafluoropropenes (HFO1234yf), 1,3,3,3- tetrafluoropropenes (HFO1234ze (E) or (Z)), trifluoro-ethylene (HFO1123).
The content for the refrigerant being used in conjunction with difluoromethane or difluoromethane and pentafluoroethane using refrigerant total amount as Benchmark, can be such as below 80 mass %, it also may be preferable for be 30~60 mass %.
Wherein, as refrigerant, suitably use：Mass ratio (R32/R125/R134a) for 23/25/52 R32, R125 and R134 mix refrigerant (R407C), mass ratio (R32/R125/HFO1234yf/R134a) is 24.3/24.7/25.3/25.7 R32, R125, HFO1234yf and R134a mix refrigerant (R449A), mass ratio (R32/R125/HFO1234yf/ R134a/HFO1234ze (E)) for 26/26/20/21/7 R32, R125, HFO1234yf, R134a and HFO1234ze (E) Mix refrigerant (R448A).
Refrigerant is more preferably made up of difluoromethane with pentafluoroethane.Difluoromethane (R32) and five fluorine in refrigerant The mass ratio (R32/R125) of ethane (R125) can be such as 40/60~70/30.As such refrigerant, suitably use Refrigerant, the refrigerant (R410A) that mass ratio (R32/R125) is 50/50 and quality that mass ratio (R32/R125) is 60/40 Than the refrigerant (R410B) that (R32/R125) is 45/55, particularly suitable use R410A.
As long as refrigerator oil is causes the temperature of the state (working fluid) mixed with refrigerant to be 80 DEG C, absolute pressure is Refrigerant dissolving viscosity under 3.4MPa is 2~4mm2/ s refrigerator oil.For refrigerator oil, except refrigerator Beyond the oily viscosity of itself, in addition it is also necessary to consider the intermiscibility (dissolubility) of refrigerant and refrigerator oil because of the species of refrigerator oil Difference is selected.It is, by selecting in the viscosity of refrigerator oil in itself and the intermiscibility (dissolving relative to refrigerant Property) two aspect among suitable refrigerator oil, come make working fluid refrigerant dissolve viscosity within the above range.
Kinematic viscosity of the refrigerator oil at 40 DEG C is preferably 2mm2/ more than s, more preferably 10mm2/ more than s, further Preferably 20mm2/ more than s, furthermore it is preferred that being 125mm2/ below s, more preferably 100mm2/ below s, more preferably 80mm2/ below s.
Kinematic viscosity of the refrigerator oil at 100 DEG C is preferably 1mm2/ more than s, more preferably 2mm2/ more than s, further Preferably 3mm2/ more than s, furthermore it is preferred that being 11mm2/ below s, more preferably 10mm2/ below s, more preferably 9mm2/s Below.
Kinematic viscosity in the present invention refers to according to JIS K-2283：1993 kinematic viscosity measured.
Viscosity reduced rate (following, also referred to as " viscosity reduced rate ") of the refrigerator oil before and after refrigerant dissolves is under Formula (1) is calculated.
Viscosity reduced rate (%)=(kinematic viscosity-refrigerant dissolving viscosity)/kinematic viscosity × 100 ... (1)
In formula (1), kinematic viscosity refers to kinematic viscosity (mm of the refrigerator oil at 80 DEG C2/ s), refrigerant dissolving viscosity Refer to the working fluid being made up of refrigerant and refrigerator oil temperature be 80 DEG C, absolute pressure be that refrigerant under 3.4MPa is molten Solve viscosity (mm2/s)。
Although viscosity reduced rate is bigger, refrigerant is more easily dissolved in refrigerator oil, but if refrigerator oil excessively dissolves in If refrigerant, lubricity has the tendency of reduction, therefore, and the viscosity reduced rate of refrigerator oil comes from the excellent viewpoint of lubricity See, preferably less than 85%, more preferably less than 80%.The lower limit of the viscosity reduced rate of refrigerator oil does not have special limit System, but viscosity reduced rate is smaller, and refrigerant is just more difficult to dissolve with respect to refrigerator oil, therefore, from the viewpoint of intermiscibility, can be with It is more than 60%, more than 70% or more than 75%.
The pour point of refrigerator oil can be preferably less than -10 DEG C, more preferably less than -20 DEG C.Pour point in the present invention is Refer to the pour point measured according to JIS K2269-1987.
Refrigerator oil with above-mentioned characteristic contains lube base oil, and contains additive as needed.Lubrication Oil base oil can be such as hydrocarbon ils or oxygen-containing oil.As hydrocarbon ils, mineral oil, olefin polymer, naphthalene compound, alkylbenzene can be enumerated Deng.As oxygen-containing oil, the Esters oils such as monoesters, diester, polyol ester, complex ester can be enumerated, PAG, polyvinylether, The ethers such as polyphenylene oxide, perfluoro-ether oil.For oxygen-containing oil, polyol ester, PAG and polyvinylether will be preferably selected from At least one of as principal component, more preferably regard polyol ester or polyvinylether as principal component.Lube base oil contains Amount can be more than 80 mass %, more than 90 mass % or more than 95 mass % on the basis of refrigerator oil total amount.
As additive, the acid-acceptors such as epoxide, carbodiimide compound, phenolic compounds, amines can be enumerated Deng antioxidant, the extreme pressure additive such as phosphorus compound, sulphur compound, the oiliness improver such as ester compounds, the defoamer, benzene such as silicone compounds The matal deactivators such as benzotriazole compound, the antiwear additive such as phosphorus compound, the viscosity index improver such as PMA compound Deng.The content of additive can be below 5 mass % or below 2 mass % on the basis of refrigerator oil total amount.
The content of refrigerator oil, relative to the refrigerant of 100 mass parts, can be 1~500 mass parts in working fluid, Can be 2~400 mass parts.
Working fluid temperature be 80 DEG C, absolute pressure be that refrigerant dissolving viscosity under 3.4MPa is 2~4mm2/ s, it is excellent Elect 2~3.9mm as2/ s, 2~3.8mm2/ s, 2~3.6mm2/ s, 2.1~4mm2/ s, 2.1~3.9mm2/ s, 2.1~3.8mm2/ S, 2.1~3.6mm2/ s, 2.2~4mm2/ s, 2.2~3.9mm2/ s, 2.2~3.8mm2/ s, 2.2~3.6mm2/ s, 2.4~ 4mm2/ s, 2.4~3.9mm2/ s, 2.4~3.8mm2/ s or 2.4~3.6mm2/s。
The refrigerant dissolving viscosity of working fluid is measured in the following order.First, to being accommodated with vibrating type viscometer In the 200mL of (vibration-type viscometer) pressure vessel, add 100g and be filled in refrigerant-cycle systems 6 Interior refrigerator oil, to being carried out in container after vacuum degassing, adds refrigerant and preparation work fluid.Now, to reach temperature The mode for the condition for being 3.4MPa for 80 DEG C, absolute pressure, adjusts the pressure of refrigerant and the temperature of pressure vessel.Also, survey The viscosity of working fluid in constant volume device.
Refrigerator 10 with the process that refrigerant and refrigerator oil are filled in refrigerant-cycle systems 6 for example, by (filling out Fill process) manufacture method manufacture, above-mentioned refrigerant has the following properties that with refrigerator oil：Working fluid is 80 in temperature DEG C, absolute pressure be 3.4MPa under conditions of show 2~4mm2/ s refrigerant dissolving viscosity.In filling work procedure, it will can make Cryogen is individually filled in refrigerant-cycle systems 6 with refrigerator oil.And the process beyond filling work procedure can with it is known The manufacture method of refrigerator is identical.
In refrigerator 10 described above, by by working fluid temperature be 80 DEG C, absolute pressure be 3.4MPa's Under the conditions of show 2~4mm2The refrigerant of/s refrigerant dissolving viscosity is filled in refrigerant-cycle systems 6 with refrigerator oil, The balance of the suppression and the raising to refrigerating capacity or refrigerating capacity to consumed energy is able to ensure that, so as to improve COP.
Here, (2) are calculated the COP of refrigerator 10 according to the following formula.The COP of refrigerator 10 (3) can also be calculated according to the following formula.
COP=refrigerating capacities (amount of cooling water) [W]/consumed energy [W] ... (2)
COP=(h1-h2)×G/P…(3)
In formula (3), h1Represent the outlet enthalpy [J/kg] of evaporator (heat exchanger) 4, h2Represent evaporator (heat exchanger) 4 Entrance enthalpy [J/kg], G represents the mass flow [kg/s] of the refrigerant circulated in refrigerant-cycle systems 6, and P represents driving The power (consumption electric power) [W] of the engine (not shown) of refrigerant-cycle systems 6.
Fig. 2 to represent using the mix refrigerant (such as R410A) containing difluoromethane as refrigerant, using with When the refrigerator oil of above-mentioned preferred kinematic viscosity is as refrigerator oil, refrigerant dissolving viscosity and the refrigerant 10 of working fluid COP relation an example curve map.As shown in Fig. 2 when the refrigerant of working fluid dissolves viscosity less than 2mm2/s When, for reasons such as sealing reductions, refrigerating capacity or refrigerating capacity reduction cannot get desired COP.On the other hand, such as The refrigerant of fruit working fluid dissolves viscosity more than 4mm2/ s, then along with the increasing of resistance when stirring resistance or refrigerator startup Greatly, the energy of consumption also increases, further, since refrigerating capacity or refrigerating capacity reduction, therefore also cannot get desired COP. Therefore, the working fluid being made up of the refrigerant filled in refrigerant-cycle systems 6 with refrigerator oil, is 80 in temperature DEG C, absolute pressure be 3.4MPa under conditions of need 2~4mm of display2/ s refrigerant dissolving viscosity, in this case, can The suppression to consumed energy and the raising to refrigerating capacity or refrigerating capacity are met simultaneously, so as to realize excellent COP.It is special It is not that the viscosity reduced rate before and after refrigerant dissolving easily realizes refrigerator oil and refrigeration simultaneously for 70~80% refrigerator oil The intermiscibility and lubricity of agent, are preferred scheme.
Symbol description
1 ... compressor, 2 ... condensers, 3 ... expansion gears, 4 ... evaporators, 5 ... streams, 6 ... refrigerant-cycle systems, 10 ... refrigerators.

Claims (3)

1. a kind of refrigerator, it possesses the refrigerant-cycle systems with compressor, condenser, expansion gear and evaporator, Refrigerant and refrigerator oil are filled with the refrigerant-cycle systems, wherein,
The working fluid being made up of the refrigerant and the refrigerator oil is in the bar that temperature is 80 DEG C, absolute pressure is 3.4MPa 2~4mm is shown under part2/ s refrigerant dissolving viscosity.
2. a kind of manufacture method of refrigerator, it is to possess the refrigerant with compressor, condenser, expansion gear and evaporator The manufacture method of the refrigerator of the circulatory system, wherein,
The manufacture method of the refrigerator has the process that refrigerant and refrigerator oil are filled in the refrigerant-cycle systems,
The working fluid being made up of the refrigerant and the refrigerator oil is in the bar that temperature is 80 DEG C, absolute pressure is 3.4MPa 2~4mm is shown under part2/ s refrigerant dissolving viscosity.
3. a kind of method for the COP for improving refrigerator, the refrigerator possesses with compressor, condenser, expansion gear and steaming The refrigerant-cycle systems of device are sent out, refrigerant and refrigerator oil are filled with the refrigerant-cycle systems, wherein,
By using be 80 DEG C in temperature, absolute pressure be to show 2~4mm under conditions of 3.4MPa2/ s refrigerant dissolving viscosity Working fluid improve the COP as the working fluid being made up of the refrigerant and the refrigerator oil.
CN201710060845.3A 2016-02-08 2017-01-25 Refrigerator, method for manufacturing refrigerator, and method for improving COP Active CN107044739B (en)

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CN202010661049.7A CN111895672B (en) 2016-02-08 2017-01-25 Refrigerator, working fluid for refrigerator, and refrigerator oil

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JP2016-021550 2016-02-08
JP2016021550A JP6736019B2 (en) 2016-02-08 2016-02-08 Refrigerator, method for manufacturing refrigerator, and method for improving COP

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