WO2013038706A1 - 冷凍装置 - Google Patents

冷凍装置 Download PDF

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Publication number
WO2013038706A1
WO2013038706A1 PCT/JP2012/005899 JP2012005899W WO2013038706A1 WO 2013038706 A1 WO2013038706 A1 WO 2013038706A1 JP 2012005899 W JP2012005899 W JP 2012005899W WO 2013038706 A1 WO2013038706 A1 WO 2013038706A1
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Prior art keywords
refrigeration apparatus
compressor
refrigerant
foreign matter
working fluid
Prior art date
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PCT/JP2012/005899
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English (en)
French (fr)
Japanese (ja)
Inventor
竜一 大野
信吾 大八木
啓晶 中井
健 苅野
飯田　登
佐藤　成広
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パナソニック株式会社
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Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to JP2013533530A priority Critical patent/JP6021077B2/ja
Priority to CN201280043660.7A priority patent/CN103782114B/zh
Publication of WO2013038706A1 publication Critical patent/WO2013038706A1/ja

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    • 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
    • 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
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • 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
    • F04B39/16—Filtration; Moisture separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003—Filters
    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/006—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant containing more than one component
    • 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
    • C09K2205/126—Unsaturated fluorinated hydrocarbons
    • 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
    • C09K2205/22—All components of a mixture being fluoro compounds
    • 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
    • C09K2205/24—Only one single fluoro component present
    • 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
    • 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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
    • F04C2210/263—HFO1234YF
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/60—Condition
    • F04C2210/62—Purity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps

Definitions

  • the present invention relates to a refrigeration apparatus using a hydrofluoroolefin having a double bond between carbon as a refrigerant.
  • FIG. 7 is a cycle diagram of the conventional refrigeration apparatus described in Patent Document 1
  • FIG. 8 is a diagram showing the characteristics of the refrigerant used in the refrigeration apparatus.
  • the working refrigerant of the refrigeration cycle in which the compressor 1, the condenser 2, the expansion mechanism 3, and the evaporator 4 are connected by the circulation path 5 is used as a mixed refrigerant containing HFO1234yf and HFO1234yf which are new refrigerants. This makes it possible to significantly lower the GWP from a refrigeration apparatus that uses a conventional refrigerant, thereby providing an refrigeration apparatus that is environmentally friendly.
  • the unsaturated fluorinated hydrocarbon refrigerant is characterized by a low GWP value, but has an unsaturated bond in the molecule. Therefore, the reactivity is high and thermal / chemical stability is poor compared to conventional saturated fluorinated hydrocarbon refrigerants such as HFC410A.
  • the hydrofluoroolefin reacted with the radical is decomposed to release hydrogen fluoride.
  • a plurality of hydrofluoroolefins are polymerized and oligomerized to form a viscous liquid or solid as polymerization proceeds further.
  • a solid product estimated to be a polymer of refrigerant was generated in the air conditioner reliability test. When such a product is generated, there is a high possibility of adverse effects such as biting into a minute gap in the apparatus.
  • the present invention solves the conventional problems.
  • a refrigeration apparatus capable of stably operating for a long period of time is prevented by preventing damage in the apparatus and lowering the performance of the refrigeration cycle.
  • the purpose is to provide.
  • a refrigeration apparatus uses a refrigerant containing hydrofluoroolefin having a double bond between carbons as a base component, or a mixed refrigerant containing the refrigerant as a working fluid.
  • a condensing means, an expansion mechanism, and an evaporating means are sequentially connected in a circular manner through a circulation path to form a refrigeration cycle for circulating the working fluid, and the compressor is provided in a sealed container provided with an inlet and an outlet. It has a compression mechanism that sucks and compresses the working fluid from the suction port, refrigeration oil is sealed inside the sealed container, and one or more foreign matter trapping means are provided in the compressor to trap the polymer. To do. As a result, it is possible to prevent the apparatus from being damaged and the refrigeration cycle from being degraded.
  • the refrigeration apparatus of the present invention can prevent damage to the apparatus and deterioration of the performance of the refrigeration cycle by installing a foreign matter trapping means when using a low GWP refrigerant that easily generates a polymer. As a result, a refrigeration apparatus realizing high efficiency and high reliability can be provided.
  • Cycle diagram of the refrigeration apparatus in Embodiment 1 of the present invention Vertical section of strainer of the refrigeration equipment
  • the longitudinal cross-sectional view of the compressor of the freezing apparatus in Embodiment 2 of this invention Longitudinal sectional view of a compressor in the refrigeration system in Embodiment 3 of the present invention
  • the longitudinal cross-sectional view of the compressor in Embodiment 4 of this invention Structure diagram of filter in strainer in embodiment 5 of the present invention Cycle diagram of conventional refrigeration equipment The figure which shows the characteristic of the refrigerant used for the refrigeration equipment
  • a compressor a condensing unit, an expansion mechanism, and an evaporating unit using as a working fluid a refrigerant based on a hydrofluoroolefin having a double bond between carbons or a mixed refrigerant containing the refrigerant.
  • the refrigeration cycle is prevented by preventing clogging of the circulation path and realizing operational stability. It is possible to prevent breakage of each device and deterioration of the performance of the refrigeration cycle.
  • the arrangement of the foreign matter capturing means is used as the discharge port of the compressor. According to this configuration, since the take-out of the polymer into the refrigeration cycle can be reduced, adhesion of the polymer to the components in the refrigeration cycle can be suppressed, and deterioration of the components can be prevented.
  • a foreign matter capturing means is provided at the suction port of the compressor.
  • recycle of a polymer can be suppressed by capturing the polymer in the circulation path immediately before the compressor.
  • the foreign matter trapping means is provided at a location where the pressure of the refrigerant is low, the performance loss of the refrigeration cycle can be suppressed by reducing the pressure loss generated by the foreign matter trapping means.
  • the structure of the foreign matter capturing means can be made to have a finer pore size, the reliability of the refrigeration apparatus can be further improved.
  • the arrangement of the foreign matter capturing means is used as a lubricating oil suction port of the compressor. According to this configuration, it is possible to suppress the penetration of the polymer into the compression mechanism and to prevent the compressor from being damaged due to the biting of the polymer.
  • the foreign matter capturing means has a three-dimensional network structure. According to this configuration, it is possible to further improve the capture rate of the polymer, and it is possible to provide a refrigeration apparatus that ensures reliability.
  • the foreign matter capturing means is formed of a foam metal. According to this configuration, the refrigerant can be passed with a low pressure loss, and a refrigeration apparatus maintaining high efficiency can be provided.
  • the foreign matter capturing means is made of glass fiber.
  • hydrogen fluoride generated by the decomposition of the refrigerant reacts with SiO 2 on the surface of the glass fiber to easily bring out a new surface of the glass fiber, so that the polymer is easily attached and captured by the foreign matter capturing means.
  • the rate can be further improved.
  • the hydrofluoroolefin is tetrafluoropropene or trifluoropropene, and a mixed refrigerant in which components are mixed so that the global warming potential is 5 or more and 750 or less is used as a working fluid. It is possible to provide a rotary compressor that has a low environmental load and is effectively highly reliable and highly efficient.
  • the hydrofluoroolefin is mainly composed of tetrafluoropropene or trifluoropropene, and difluoromethane or / and pentafluoroethane is used so that the global warming potential is 5 or more and 750 or less.
  • the tenth aspect of the invention in particular, by setting the global warming potential of the mixed refrigerant to 350 or less, it is possible to provide a rotary compressor that has a low environmental load and is effectively highly reliable and efficient.
  • an eleventh aspect of the invention in particular, as a refrigerating machine oil, polyoxyalkylene glycols, polyvinyl ethers, poly (oxy) alkylene glycol or copolymers of the monoether and polyvinyl ether, polyol esters, and oxygen-containing compounds of polycarbonates Therefore, it is possible to effectively provide a highly reliable and highly efficient rotary compressor by using a synthetic oil mainly composed of benzene or a synthetic oil mainly composed of alkylbenzenes and ⁇ -olefins.
  • a synthetic oil mainly composed of benzene or a synthetic oil mainly composed of alkylbenzenes and ⁇ -olefins a synthetic oil mainly composed of alkylbenzenes and ⁇ -olefins.
  • FIG. 1 is a cycle diagram of a refrigeration apparatus in Embodiment 1 of the present invention
  • FIG. 2 is a longitudinal sectional view of a strainer of the refrigeration apparatus.
  • the refrigeration apparatus in the present embodiment includes a compressor 1, a condensing means (condenser) 2, an expansion mechanism 3, and an evaporating means (evaporator) 4 in order in a circular path 5.
  • a refrigeration cycle is configured to connect and circulate the working fluid.
  • a refrigerant having a base component of hydrofluoroolefin (HFO1234yf) having a double bond between carbon and carbon is used as the working fluid.
  • the working fluid may be a single refrigerant made of hydrofluoroolefin or a mixed refrigerant containing hydrofluoroolefin.
  • the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 enters the condenser 2 and is condensed by heat exchange.
  • the liquefied refrigerant is depressurized through the expansion mechanism 3, evaporated in the evaporator 4, becomes a low-temperature low-pressure gas, and returns to the compressor 1 again.
  • the strainer 6 shown in FIG. 2 is provided in an oil passage or a gas passage (not shown) in the compressor 1.
  • the hydrofluoroolefin used as a refrigerant may be decomposed by oxidation in a high-temperature environment to produce hydrogen fluoride, and at the same time undergo a polymerization reaction to form a polymer 8.
  • the strainer 6 includes a filter 7 inside, and captures the polymer 8 that is caused to flow by the flow of a refrigerant or refrigeration oil indicated by an arrow.
  • the strainer 6 By installing the strainer 6 in the compressor 1, it is possible to capture the polymer 8 in the compressor 1 that tends to be a source of generation at high temperatures, damage of each device in the refrigeration cycle, and the performance of the refrigeration cycle. A decrease can be prevented.
  • the structure of the strainer 6 is not limited to this, What is necessary is just to take the structure which can capture
  • FIG. 3 is a longitudinal sectional view of the compressor of the refrigeration apparatus in Embodiment 2 of the present invention. Since the refrigeration cycle is the same as that of the first embodiment, description thereof is omitted.
  • an electric motor unit 12 and a compression mechanism 13 driven by the electric motor unit 12 are provided in a sealed container 11 having an inlet 9 and an outlet 10. Is accommodated to constitute the compressor 1.
  • the low-temperature and low-pressure refrigerant gas sucked from the suction port 9 is compressed by the compression mechanism 13, becomes high-temperature and high-pressure, passes through the space in the sealed container 11, and is discharged from the discharge port 10 to a circulation path (not shown).
  • an oil suction port 14 is provided at the lower part of the compression mechanism 13, and the refrigerating machine oil at the bottom in the sealed container 11 is sent to the compression mechanism 13 to improve the lubrication of the compression mechanism 13.
  • the hydrofluoroolefin may cause a polymerization reaction to form a polymer 8.
  • the sliding portion configured in the compression mechanism 13 there is a high possibility that the components are brought into a mixed lubrication state or a solid lubrication state in which contact between the components occurs, whereby the ambient atmosphere becomes high temperature and pressure and the hydrofluoroolefin refrigerant is polymerized. Prone to reaction. Therefore, in this embodiment, the strainer 6 is attached to the discharge port 10, and even when the polymer 8 is generated, the strainer 6 is prevented from flowing out to a circulation path (not shown), and the refrigeration due to the adhesion of the polymer 8 is performed. It is possible to prevent deterioration of parts in the cycle and deterioration of the performance of the refrigeration cycle.
  • FIG. 4 is a longitudinal sectional view of the compressor of the refrigeration apparatus in Embodiment 3 of the present invention. Note that the refrigeration cycle is the same as that of the first embodiment, and the same reference numerals are used for the components described in the above embodiments, and the description thereof is omitted.
  • a strainer 6 that is a foreign matter capturing means is attached to the suction port 9.
  • invasion into the compressor 1 from the circulation path which is not shown in figure can be prevented, and the failure
  • the foreign matter trapping means is provided at a location where the pressure of the refrigerant is low, the performance loss of the refrigeration cycle can be suppressed by reducing the pressure loss generated by the foreign matter trapping means.
  • the structure of the foreign matter capturing means can be made to have a finer hole diameter, fine foreign matter can also be removed.
  • the strainer 6 may be attached to both the discharge port 10 and the suction port 9.
  • FIG. 5 is a longitudinal sectional view of the compressor of the refrigeration apparatus in Embodiment 4 of the present invention. Note that the refrigeration cycle is the same as that of the first embodiment, and the same reference numerals are used for the components described in the above embodiments, and the description thereof is omitted.
  • the refrigeration apparatus in the present embodiment has a strainer 6 attached to the oil suction port 14 of the compressor 1.
  • the strainer 6 may be attached to the oil suction port 14 together with the discharge port 10 or the suction port 9 or together with the discharge port 10 and the suction port 9.
  • the strainer 6 is provided in the compressor 1, but it may be provided in a refrigeration cycle other than the compressor 1.
  • FIG. 6 shows the structure of the filter in the strainer of the refrigeration apparatus in Embodiment 5 of the present invention. Since the refrigeration cycle and the compressor 1 are the same as those in the first to fourth embodiments already described, description thereof is omitted.
  • the material of the filter 7 in the strainer 6 of the refrigeration apparatus in the present embodiment is a material having the same three-dimensional network structure as a resin foam represented by a sponge.
  • the material of the filter 7 is a foam metal such as copper or aluminum. Since the foam metal has a continuous pore structure and a large porosity, it is possible to suppress a pressure loss generated when the refrigerant is passed, and to provide a highly efficient refrigeration apparatus.
  • the material of the filter 7 is suitably a glass fiber that hardly causes an adverse effect in the refrigeration cycle and has a high ability to capture a reaction product of the refrigerant.
  • glass fibers so-called glass wool, which is a collection of short fibers in a wool shape, is most suitable because it has a high ability to trap refrigerant reactants. Glass wool is made of glass fiber in the form of cotton, but its surface is SiO 2 .
  • Hydrogen fluoride generated by the decomposition of the refrigerant easily reacts with SiO 2 on the surface of the glass fiber, and tends to give a new surface on the surface of the glass fiber. Therefore, the capture of the polymer 8 produced by the reaction of the refrigerant can be further promoted.
  • the present invention is not limited to the material of the filter 7 shown in the above embodiment, and any material such as resin such as polypropylene, polyethylene, polyethylene terephthalate, nylon, metal wool such as SUS, glass fiber, or the like is used. It doesn't matter.
  • the hydrofluoroolefin used in the above embodiment is tetrafluoropropene or trifluoropropene, and operates a mixed refrigerant in which components are mixed so that the global warming potential is 5 or more and 750 or less, preferably 300 or less. It can be a fluid.
  • hydrofluoroolefin used in the above embodiment is mainly composed of tetrafluoropropene or trifluoropropene, difluoromethane (HFC32) and / or pentafluoroethane (HFC125), and has a global warming potential of 5 or more,
  • a mixed refrigerant in which two components are mixed or three components are mixed can be used as a working fluid so as to be 750 or less.
  • tetrafluoropropene can be mixed with hydrofluorocarbons that do not have double bonds (difluoromethane (HFC32), pentafluoroethane (HFC125)) to reduce the temperature difference despite the non-azeotropic refrigerant mixture. Since the behavior approaches that of the pseudo azeotropic refrigerant mixture, the cooling performance and the cooling performance coefficient (COP) of the cooling cycle device can be improved.
  • HFC32 difluoromethane
  • HFC125 pentafluoroethane
  • the GWP of the mixed refrigerant it is necessary to mix two components or three components so as to be 5 or more and 750 or less, and desirably 300 or less.
  • HFO1234yf and HFC32 it is desirable that HFO1234yf be 56 wt% or more.
  • HFO1234yf in order to mix HFO1234yf and HFC125 to make GWP750 or less, it is desirable that HFO1234yf be 91.6 wt% or more in order to make HFO1234yf 78.7 wt% or more and further GWP300 or less.
  • polyol ester oil compatible with HFO1234yf is used as the refrigerating machine oil.
  • the refrigerating cycle can be used even when the refrigerating machine oil composed of polyvinyl ether or polyalkylene glycol is used.
  • the refrigerating machine oil discharged in step 1 can be recovered in the compressor 1, and the highly reliable compressor 1 can be obtained similarly.
  • the above refrigerating machine oil is compatible as a mixed refrigerant with the HFC refrigerant, the same effect can be obtained.
  • the refrigeration apparatus according to the present invention has a strainer installed in the refrigeration cycle even when using a low GWP refrigerant having a property of easily generating a polymer. Since it is possible to suppress a decrease in the performance of the refrigeration cycle, the present invention can be applied to applications such as air conditioners, car air conditioners, refrigerators, dehumidifiers, heat pump dryers, heat pump water heaters, and beverage vending machines.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Compressor (AREA)
  • Lubricants (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
PCT/JP2012/005899 2011-09-16 2012-09-14 冷凍装置 WO2013038706A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2013533530A JP6021077B2 (ja) 2011-09-16 2012-09-14 冷凍装置
CN201280043660.7A CN103782114B (zh) 2011-09-16 2012-09-14 冷冻装置

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Application Number Priority Date Filing Date Title
JP2011-202624 2011-09-16
JP2011202624 2011-09-16

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WO2013038706A1 true WO2013038706A1 (ja) 2013-03-21

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JP2018096571A (ja) * 2016-12-09 2018-06-21 ダイキン工業株式会社 熱搬送装置及びそれを用いた熱搬送方法
JP2021060194A (ja) * 2021-01-22 2021-04-15 ダイキン工業株式会社 冷凍装置
WO2024127577A1 (ja) * 2022-12-15 2024-06-20 三菱電機株式会社 冷凍サイクル装置および圧縮機

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JP2021060194A (ja) * 2021-01-22 2021-04-15 ダイキン工業株式会社 冷凍装置
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