`
`dos hrcvct 5
`9))
`
`ommempéen
`
`Patent Translate
`
`Powered by EPO and Google
`
`Notice
`
`This translation is machine—generated. It cannot be guaranteed that it is intelligible, accurate,
`
`complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
`
`financial decisions, should not be based on machine-translation output.
`
`DESCRIPTION JP2001019944
`
`[000 1]
`
`BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
`
`low temperature working fluid comprising carbon dioxide and ethane and a refrigeration cycle
`
`apparatus using the same.
`
`[0 O O 1]
`
`[Xi‘éHHODJEi'é‘ZofiWififi] Zlfi‘éfifilix :%llfli}$&il5zVb‘BféfizoffiEl’EI/Ffifllfifiik
`
`\%h%fiwkfifififfiw%fitfifi%o
`
`[0002]
`
`Conventionally, as one method for cooling to a very low temperature of minus several tens of
`
`degrees, two-way refrigeration which combines a high—temperature cycle on the high—
`
`temperature side and a low—stage cycle on the low temperature side There is a cycle device. That
`
`is, by cooling the condenser of the low cycle constituting the cascade condenser by the high
`
`stage cycle evaporator constituting the cascade condenser, cooling to a very low temperature is
`
`performed.
`
`[0 0 0 2]
`
`[iféfiéwifififi] {EEK 747LX££I+F§tw5 alificchEwi/EJE/‘xmafiflafifi 722950)
`
`#fiific‘: LT, firmware—2&4 711/ tifiifllflflwlfifii—tfi/r WWHHJi/ETb-ttfi: 2 fiwfiirfifi/r 7
`
`112%Eifiabao “$732195, 7‘3X’7— F :1 V—T—“Vfi7‘il‘fiifii‘é’FéEEfifi/I’ fill/axififific: J: D , E L:
`
`<fix€~F:V?Vfi%%fii%fi%fi¥7»®fifi%%fiflfiéCawiof\fifiwfiw
`
`fEJERODIiififl/Efii EMTC%%§O
`
`[0003]
`
`Generally, in a refrigeration cycle apparatus, a refrigeration cycle is constituted by connecting a
`
`compressor, a four-way valve, a condenser, a throttling device such as a capillary tube or an
`
`15—05-201 7
`
`1
`
`
`
`expansion valve, an evaporator, an accumulator and the like as needed, Cooling or heating action
`
`is performed by circulating the refrigerant inside. As refrigerants in these refrigeration cycle
`
`apparatuses, halogenated hydrocarbons derived from methane or ethane called CFCs (hereinafter
`
`referred to as ROO or ROOO, as stipulated by the ASHRAE 34 standard in the United States of
`
`America) Are known.
`
`[0 0 0 3] flaw; eraawawgfiu. Efifa‘ifi. figacmcffllfifi. rams.
`
`:FJVE—EU
`
`~3fi~7®fi§6fifi§®firfib§fi 722g; 7$a~bb~9%&fia‘§ififibffififi4011/72
`
`law/it. %®W%Bfi:7%fi¥%ffiffiéfiecmcatb. fiflircaibnfii’FFH/Efiofwz).
`
`ashram)
`
`fiififi472b%ficcfiw>§¥%fiit L'Cci. 7UV¥E (LX‘FROOifdiROOOtéfl'g‘C 2:73“.
`
`*EASHRAE34fifimgbfiEémfwé)afifinexayikulaybefigéh
`
`rant:lfyflzifiibkibwgm'cmzn
`
`[0004]
`
`In the two—stage refrigeration cycle apparatus as described above, R1 3 (chlorotrifluoromethane,
`
`CClF 3, boiling point-81.3 ° C.) is used as the refrigerant for the low stage cycle, R22 (chloro
`
`Difluoromethane, CHClF 2, boiling point —40.8 ° C.) and the like have been used.
`
`[0 0 0 4] £330); 5 72’: 2 fi®¥$¥$fi4 71b§§ti5mrcm fiEfifi/I’ filbffilfifiit L’Cli
`
`R13 (7mm I~ U 711/71‘EDI 3V. CClF3.
`
`iififi— 81.
`
`3 ° C)
`
`. ETEQfi/rbibfififiatzié: L'C
`
`a: R 2 2 (7 uu§71b7tu>l 51 y. CHc1F2.
`
`ifiifi— 4 0.
`
`8 ° c) fiEb‘Ffiwez/rcerco
`
`[0005]
`
`Since R13 is fluorinated hydrocarbons containing chlorine (CFC refrigerant) and R22 is
`
`fluorocarbons containing chlorine and hydrogen (HCFC refrigerant), each of which has
`
`stratospheric ozone destroying ability, it has already been used in Montreal Regulations on usage
`
`and production volume are determined by the protocol. For example, as an alternative refrigerant
`
`for R22, an alternative refrigerant for fluorinated hydrocarbons (HFC refrigerant) containing
`
`hydrogen but not containing fluorine and hydrocarbons not containing fluorine (HC refrigerant)
`
`is suggested There.
`
`[0 0 0 5] C®R13Liffii%fifl7v{tifift7kiifi (C F Graffiti)
`
`. R 2 2 Lifiibkié’:
`
`‘a‘UTMUfifbkiifi (HC F (3.742%) “Gibb. uwfihefiifilfi‘j‘yfifiififiahbflaé72.525.
`
`fir
`
`”C‘LC%‘/ ]~ I) i—xbfiiécz; aTfifififikoififimfifiwbfisfifiérift/‘25. @2038.
`
`R 2 2 ofifififiia brash. fi¥ifiifimcctfiiefiifi fliefi‘iwwtfimmififi
`
`(HF Craig) 5?. Tyie‘a‘imwfi‘fbkiifi (HCVF‘QE) @lfifififiibfiffi$éhfw%o
`
`[0006]
`
`15—05-201 7
`
`2
`
`
`
`On the other hand, as an alternative refrigerant for R13, an alternative refrigerant using
`
`fluorinated hydrocarbons not containing chlorine in its molecular structure has been proposed.
`
`For example, R 508 A is a mixture of 39 wt% and 61 wt% of R 23 (trifluoromethane, CHF 3,
`
`boiling point - 82.1 ° C.) and R 1 16 (hexafluoroethane, CF 3 CF 3, boiling point — 78.2 ° C.) Like
`
`mixed refrigerant and R 508 B is an azeotrope—like mixed refrigerant composed of 46 wt% and
`
`54 wt% of R 23 and R 1 16, respectively. That is, since R508A and R508B have the same R23 and
`
`R1 16 as constituent components, and the mixing ratio is slightly different, the refrigerating
`
`performance is almost the same.
`
`[0 0 0 6] :13, R 1 swififififiiabfe, fififiifimbctfifizfiifauvvitfiéibkififi
`
`Efiwtfififififi%¥éhfw%oWig,R508AflxRZBCFU7Wfiuflfiyx
`
`CHFS, 12121—8 2.
`
`1° c) 2:R 1
`
`1 6 (“\i‘fi‘7fl/Z‘UI9V\ crscrs, 223%
`
`—7 8. 2° c) fiat/twat 3 9§%%2‘: 6 1E§%b~6&éi§ifii§ifiéf€fiipa§m
`
`R508Bd,R23&R116fi%n%h,46$§%t54§§%beaéfifififiéfifi
`
`6&6)ifingR508A£R508Bd\EUR23&R116%%fiKfi&L\Efi%
`
`fibifi¥flfi%fécicflé%®'a fifi’ffififl: Lfliflithfifib'éafi’éo
`
`[0007]
`
`Here, R23 is fluorinated hydrocarbons (HFC refrigerant) in which three hydrogens of methane
`
`are substituted with fluorine, R1 16 is fluorinated hydrocarbons in which all hydrogen of ethane
`
`is substituted with fluorine (PFC refrigerant ), And the problem that the global warming potential
`
`coefficient (hereinafter referred to as GWP) indicating the influence on global warming which is
`
`another problem of the global environmental problem is much higher than that of the
`
`conventional HCFC refrigerant R22 is is there. According to the IPCC (Intergovernmental Panel
`
`on Climate Change) report in 1995, the comparison value for the 100-year horizontal axis at the
`
`time of integration when C02 (carbon dioxide) GWP is 1, R22 GWP is The GWP of 1 500 and R23
`
`is 1 1700, and the GWP of R1 16 is 9200. The GWP of R508A obtained by mixing these is 10200,
`and the GWP of R508B is estimated to be 10400.
`
`[0007]::p,R23ux@Vw39®m$fi7v$pfimémh7vmfimmifi
`
`CHFCfifi),R116digymfiwfwmifi7vipfimemt7vmfimmifi
`
`( P F C fififi) 6% D ,
`
`iiflffliffiffiF‘n'fiEOD EE 5 m9®§$§§fii§ E) fiflffifiilffiflflcfifi‘ E) fi?§%ffi“flfl
`
`iii/Effififti¥:fi
`
`(LX‘FGW P 2:33?) 75“, $1¥§EODH C F CfifiiOD R 2 2 2&th féfllfifificzfefibx 2:
`
`[1‘ 5 fi%0)%?90
`
`1 9 9 5 flit?) I P C C (Intergovermental Panel on Climate Change, fiflfifiifi
`
`Elma/<21») 111%: and“, C o 2 (:filtfifii) a) G W P 72 1 2: bf: 22: a? mieaeekwm
`
`100$®flfifid,Rzzmowpdlsoo,R23®GWPu11700,R116®
`
`CWPti9 2 0 0'C°%0\ Cflgfifi’E/SLER 5 0 SAUDGWPiil 0 2 0 0, R 5 0 8 B0)
`
`GWPiil 0 4 0 0 aéfifiefinr‘éo
`
`15—05-201 7
`
`3
`
`
`
`[0008]
`
`DISCLOSURE OF THE INVENTION Problem to be Solved by the Invention The present invention
`
`solves the device problem in the case where CO 2 (carbon dioxide) is used in a refrigeration cycle
`
`apparatus as an alternative to these high—temperature working fluids with high GWP, In order to
`
`solve the above problem.
`
`[0 0 0 8]
`
`[fififib‘ififimbxa t‘fifififi] Zlfififimi, ChBODGWPODEU‘IiEi’EI’FEfiIZIWD
`
`fifitbf.coz(:fimfii)efififiKb»%§mmwé%eofi%fifiefiflb.@h
`
`E%fi%eokw®fi%fifia%%bia&?%%®p&%o
`
`[0009]
`
`Specifically, one problem in the case of using CO 2 (carbon dioxide) for a refrigeration cycle
`
`apparatus is that when a CO 2 single refrigerant is used, the discharge temperature in the
`
`compressor of the refrigeration cycle apparatus tends to rise There is a problem that careful
`
`attention must be paid to the reliability of the lubricating oil for the compressor to be used.
`
`[0 0 0 9] filesfi’alaai, C o 2 (:leifiié) Kira/Fix71b%filafifiu\ai%éoeomfififi
`
`fifim.cozfiefifiemwéa.fififiKb»%§®E%fiw5Ué%mfiEfiifiL$?
`
`m:&p&0.EmfieEfi%fifififiwfififimmbofifieLawmmtetmtmafifi
`
`Wage
`
`[0010]
`
`Another problem in the case of using CO 2 (carbon dioxide) for a refrigeration cycle apparatus is
`
`that CO 2 is a naphthene type or paraffin type mineral oil, an alkylbenzene oil, an ether oil, an
`
`ester oil, a polyalkylene glycol oil, a carbonate Oil and the like with a lubricating oil for a
`
`compressor in a certain temperature range but in a wide temperature range of the operating
`
`state from the start of the operation of the refrigeration cycle apparatus using CO 2 as a
`
`refrigerant until the actual low temperature is obtained, do not do. Also, even in an arbitrary
`
`mixture ratio of CO 2 (carbon dioxide) and lubricating oil for compressor, it is not necessarily
`
`completely dissolved. That is, there is a problem of securing an oil return to the compressor of
`
`the compressor lubricant coexisting with CO 2.
`
`[00101C02(:@mfi%)éfifi647W%fitmwéfié®efiejmfifififid.
`
`C02@.f7?y%%fifi74y%®%fl.7W$W&V€Vfl.I—%wfl.lx%wm.
`
`
`fiU7b$by5U3~w@.fi~fi1~tfl\$®Efifimfifimaei®fifififlcdfifl
`
`ism,CO2%fifit?%fififi¥7wgfiwfi%%%be,$$®fifi&%%ipwfififi
`
`fi®fiwfi§fitfimf.%€b%%fififibfiwoikcoz(:Mmfii)aE%%mflfi
`
`fi®E§®EA%fimfimfe,%fb%%éfi%btmofitbfi.cozkfififiéEfifi
`
`fififlfl®E%%«®i%wu9—yéfififiéam5fififi&%o
`
`15—05-201 7
`
`4
`
`
`
`[OOIH
`
`In the present invention, in order to ensure the oil return to the compressor of the compressor
`
`lubricating oil coexisting with the reduction of the compressor discharge temperature when CO 2
`
`is used, the chemical structure of the lubricating oil for the compressor It is a low temperature
`
`working fluid that mixes ethane (CH 3 — CH 3, R 170, boiling point — 88.8 ° C.), which are
`
`hydrocarbons highly azeotropic with CO 2, in a small amount range and has other excellent
`
`characteristics The present invention relates to a refrigeration cycle apparatus using a low
`
`temperature working fluid comprising C02 and R1 70.
`
`[0011]$%%@\CO2%@W¢%%Q®Efi%%flfi§®fifitfififi@Efififififi
`
`fiGEfififl®i4WU9HVEfi§¢éth\mifififitEfifififififikfi<x
`
`coztfimfimfimfimmifip%ala>1mmuma R170\%fi—88.8°C)%
`
`9§®fiflfifiéfiéfifififlfififi%b\mt%@hk%fi%%0:®C028R170#6
`
`fi%fifi¢flfi%%fiw%@fififfifl%fimfifié%®T£%o
`
`[001m
`
`A first aspect of the present invention is a low temperature working fluid for use in a
`
`refrigeration cycle apparatus comprising carbon dioxide and ethane and containing carbon
`
`dioxide of 60% by weight or more.
`
`[0012][fifi%%fi¢ékb®$$l$fifitfi%%fifild\:@mfiialfiybg
`
`&0\60$§%ML®:@mfi$%%o\@fifi47w%fitfiwéfifiWEmwa%o
`
`[0013
`
`A second aspect of the present invention is a low—temperature working fluid according to claim 1,
`
`which is composed of carbon dioxide and ethane and contains 80% by weight or more of carbon
`dioxide.
`
`[0013]$fi%t&é%fifi2@\:fimfiialfiy#5&0\80§%%mio:%m
`
`fii%fifl%fifilfifi®fifi¢flfififi§%o
`
`[0014]
`
`According to a third aspect of the present invention, there is provided a refrigeration cycle
`
`apparatus using the low temperature working fluid comprising carbon dioxide and ethane
`
`according to the first aspect.
`
`15—05-201 7
`
`5
`
`
`
`[0014]$fi%fi&%%fifi3fi.fififi1Efi®ZfikWitlfiyfigfi%fifiWflfi
`
`l$§fifiméfifl$fi4 71b%fi’€%>§o
`
`[0015
`
`According to a fourth aspect of the present invention, there is provided a refrigeration cycle
`
`apparatus which uses a low—temperature working fluid comprising carbon dioxide and ethane
`
`according to claim 1 and operates at a condensing temperature of 1 8 ° C. or lower.
`
`[0015]$fi%m&%%fifi4@.fififi1Efi®:@kfiit1§ybgggfifi¢flfi
`
`Wémw.fififififi18°CmefiW?%$fifi47w%fip5%o
`
`[001$
`
`According to a fifth aspect of the present invention, there is provided a low temperature working
`
`fluid comprising carbon dioxide and ethane according to claim 1, wherein the condensing
`
`temperature is 18 ° C. or less, the evaporation temperature is —56 ° C., which is the triple point
`
`of carbon dioxide It is a refrigeration cycle device operating at 6 ° C or higher.
`
`[0016lfififittéfififi5fl.fififi1Efi®ifikfiiklaybgt%fifififlfi
`
`W%mW.fififigfi18°CuT?.fififififi:%kfii®3§fic%%—56.6°Cui
`
`Tflfifi%fififi47w%fiffi%o
`
`[OOlfl
`
`According to a sixth aspect of the present invention, there is provided a low—temperature working
`
`fluid comprising carbon dioxide and ethane as claimed in claim 1, which is used as a low—stage
`
`refrigeration cycle refrigerant operating at a condensing temperature of 18 ° C. or lower, It is a
`
`refrigeration cycle device.
`
`[0 0 1 7] $fififilzt%§§flilfi6ci éfiafifi1§E$EOD:E&{tifi§féklaybwgggfiyfiwflm
`
`W%.fififigfi18°CMTTEW?%E$®fififi47WfififiELTWw§2fi®fififi
`
`47w%fipfiéo
`
`[0018]
`
`A seventh aspect of the present invention is the refrigeration cycle apparatus of the third aspect,
`
`wherein the refrigeration cycle apparatus uses a high—pressure type compressor.
`
`[0018]$%%t&%%fi$7d.fififisfifiofififi47w%fip.EEfiKfioEfi
`
`%&Emaéfififi%7wgfippao
`
`15—05-201 7
`
`6
`
`
`
`[0019]
`
`According to a seventh aspect of the present invention, there is provided a refrigeration cycle
`
`apparatus according to the seventh aspect, wherein the refrigeration cycle apparatus uses a
`
`compressor lubricating oil having a viscosity grade of 5 centistokes or more at 100 ° C.
`
`[0 0 1 9] zkfifimaaééfiflirfisci, aamafiaimzarawrmbafifi
`
`1 0 0° 065-1:
`
`y%xF—ézmiwfififib—F%%OE%%$E§E%E$?%$K#Kfiw%fip&%o
`
`[0020]
`
`DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Carbon dioxide (CO 2) which is a
`
`low—temperature working fluid is azeotropic mixture with hydrocarbons such as propane (RZQO),
`
`isobutane (R600a), n-butane (R600) . However, it has been conventionally known to make an
`
`azeotropic mixture with ethane (CH 3 ——CH 3, R 170, boiling point — 88.8 ° C.) which is one kind
`
`of hydrocarbons. For example, Aage Fredenslund and Jorgen Mollerup: "Measurement and
`
`Prediction of Equilibrium Ratios for the C2 H 6 + C0 2 System", J. Chem. Soc. Farady Trans, Vol.
`
`1, no. 70, p. 1653-1660 (1974) and Kazuaki Ohgaki and Takashi Katayama: "Isothermal Vapor -
`
`Liquid Equilibrium for the Ethane - Carbon Dioxide System at High Temperature", Fluid Phase
`
`Equilibria, Vol. 1, p. 27—32 (1977), gas—liquid equilibrium characteristics of carbon dioxide (CO 2)
`
`and ethane (R 170) are measured. In these documents, it has been shown that CO 2 and R 170
`
`form an azeotrope—like mixture at about 60 to 70 mol% CO 2 (ie, about 69 to 77 wt% C0 2). The
`
`relationship between the highest critical temperature at which the condensation zone exists and
`
`the composition of the mixture is clarified, and it has been reported that the condensed zone
`
`exists at an arbitrary mixed composition of CO 2 and R 170 at about 18 ° C. or lower.
`
`[0 0 2 O]
`
`[fiHHODfifiEODIEfiE] {Effil’fiibiifilfli‘fiflé’3Zfiftfi‘i (C O 2) Li. fiflflkififi‘t‘
`
`@afufiy(R290).4V7QVCR600a).n—79y(R600)%kfifififi
`
`flawafifibfiwoth.fimmifi®efic%alayumaam.R170.%fi
`
`—88.8°C)fifififififiw&fi%ikfl\fi¥i0fl6flfwkoWifl\M$
`
`Fredenslund and Jorgen Mollerup:"Measurement and Predictionof Equilibrium Ratios for the
`
`C2H6+C02 System", J.Chem. Soc. Farady Trans., vol.1, no.70, p.1653—1660 (1974))?0‘ Kazuaki
`
`Ohgaki and Takashi Katayama:"lsothermal Vapor—Liquid Equilibrium for the Ethane—Carbon
`
`Dioxide System at High Temperatue", Fluid Phase Equilibria, vol.1, p.27—32 (1977)”(9621A :%fl3
`
`fii<coz>ti&y(R170)@fifi?fi%fifiwfiénfméoCmgofimpd.
`
`cozfifico~70%w%(¢fib5.C02fi%69~77§%%)p.coza
`
`R 1 7 0 b‘fiififiE/E‘I‘W7EI’FZQ C E: 717%}? 13 73%: :35 in? b \ E) o E Tc.
`
`fifiifiififib‘fififi‘ Z.) fi’gGEEE'?
`
`fifiafiémfi®fififiwgbmamffib.$18°cmTpdcozaR170®E§®E
`
`fififlfii'éifififififibfifififi E) C. &: ffiili’fiié 11? D W E) o
`
`15—05-201 7
`
`7
`
`
`
`[OOZH
`
`However, the characteristics as a refrigerant when using an azeotrope—like mixture composed of
`
`carbon dioxide (CO 2) and ethane (R 1 70) as a low-temperature working fluid of a refrigeration
`
`cycle apparatus has been unknown. The present invention has found out that it is possible to
`
`solve practical equipment problems by finding outstanding characteristics when a low
`
`temperature working fluid comprising carbon dioxide (CO 2) and ethane (R 1 70) is used as a
`
`refrigerant of a refrigeration cycle apparatus is there.
`
`[0 0 21] Lhwbtfla‘ir‘ofiéfié. bwbwz):wtfi§é (C02) ESE/27V (R17 0) baggy;
`
`fififififlé.@fifi47w%fi®fifiWflfiwaLfmmamfitofofifiabf®%fiu
`
`$fl®%®c&oko$fimu.:fimfii(coz)&I&V(R170)#6&%fifi¢fl
`
`mwa.fififi47w%fiofifiaLfmwé%é®%mk%fi&fiflb.ifiiofi%fifia
`
`%&c%%:&%EVMLk%®c%éo
`
`[002m
`
`The present invention relates to a refrigeration cycle apparatus in which R1 70 (ethane) selected
`
`from C0 2 (carbon dioxide) and hydrocarbons forming an azeotrope-like mixture is mixed so as
`
`to contain not less than 60% by weight of C0 2 It is a low temperature working fluid used. By
`
`combining the above—mentioned combination, it is made possible to eliminate the influence on
`
`the stratospheric ozone layer by making the refrigerant as the refrigeration cycle device into a
`
`mixture containing natural refrigerant C0 2 and hydrocarbons R 170 is there. Further, since such
`
`a mixture is composed of only C0 2 having a GWP of 1 and hydrocarbons having little GWP, the
`
`refrigerant obtained by mixing these hydrocarbons also has little influence on global warming.
`
`Here, ethane (R1 70) has no difference in global environmental problems even when it contains
`
`some propane (R290), isobutane (R600a) and n—butane (R600) at refining. Also, if C0 2 and R
`
`1 70 are mixed so as to contain 60 wt% or more of C0 2, the temperature gradient can be
`
`brought almost to zero in both the condenser and the evaporator of the refrigeration cycle
`
`apparatus, and the condensation process is included It was found that almost no azeotropic
`
`mixture composition can be handled even in the case of no refrigeration cycle apparatus.
`
`Furthermore, since C02 and R1 70 are mixed so as to contain not less than 60% by weight of
`
`C02, when this low—temperature working fluid is used as a refrigerant of a refrigeration cycle
`
`apparatus due to the discharge temperature reduction effect of R170, a C02 single refrigerant is
`
`used It is possible to greatly reduce the discharge temperature in the compressor. Furthermore, if
`
`C02 and R170 are mixed so as to contain 60% by weight or more of C02, the refrigerating
`
`capacity and the coefficient of performance are superior to those of the HFC mixed refrigerant of
`
`R508A and R508B proposed as an alternative refrigerant.
`
`[0022]$%wu.coz(:fimfii)a.#%fifié%&fi%fimm$fibefifimt
`
`R170<x9y)%.60§%%m1®c02%fi8;5mfiébk.fififix9w%fimm
`
`15—05-201 7
`
`8
`
`
`
`
`wafifififlfiwceao:flomeewaof,fififi47w%fitbf®fifi%,Efififi
`
`T$éCOZ&\fimmifififiéRl70%?UE%%&&?CEE$D\KEEfiVVEE
`
`fifii%%afi<fiazeam%afiéeoc%éoagtbaefleww,GWPfi1®
`
`cozatGWPfifiahfifiwfimflifi®R170®$fi6fifiéhékb\Ch6%fifi
`
`bfcfiab’fiéh imffléiafifififtccfi'iafizaficicataamwemcaaao :C'clé‘ly (R17 0) ti
`
`\%%%EEWT\§9®7UNV(R290),{V79V(R6008)\n—79V
`
`(R600)fifiinfmfe,mfifi%%EM@flefiflmfiwewceaoit,coze
`
`R170%\60§%%ui®co2%fifliitfififihfi\fififi49w%fiflfi%%$fi
`
`fi§®fifim5mf\magmafiahafiumfi<fiacefica,fifififiafiitwfifi
`
`fi47}b%§b:ifiwfe\ ciahéi‘éiifii‘éfiifiéfflfifitbfflaécthiabb‘afco 3131:,
`
`COZER170&\60$§%ML®COZ%§U$5EE§LEEb\R170®%&fi§
`
`fififi%m;0,cofifififlfiwafififi47w%fi®fifitLfmwke%m\cozfie
`
`afiemwaeeogfifiueuaammgake<flmpeaawawmafiaaogem,
`
`cozeR170%\60$§%uiocozafifigatfiefinfi,fifififitbtfifia
`
`nTmaRsosA,R508BQHFC%Eéfifi$befifi%fi$fifififififinéo
`
`[0023]
`
`Furthermore, the present invention limits CO 2 and R 1 70 to contain not less than 80% by weight
`
`of CO 2. In this case, it is expected that the refrigerating capacity and the coefficient of
`
`performance will be superior to CO 2 single refrigerant it can. Such an effect is unknown only
`
`from the conventional gas-liquid equilibrium measurement. Also, by mixing so as to contain more
`
`than 80% by weight of CO 2, it is possible to prevent the danger of inflammability even in the
`
`unlikely event of leakage. That is, since the low temperature working fluid comprising CO 2 and
`
`R 170 in the refrigeration cycle apparatus selectively dissolves in the lubricating oil for
`
`compressor in the operating state, it has a circulation composition containing almost 85 wt% or
`
`more of CO 2 In such a composition range, due to the incombustible effect of CO 2, the low
`
`temperature working fluid can be made substantially incombustible.
`
`[oozslaew$fi%u,cozeR17oa,80§%%uiocozafioaiwmi
`
`Lt$®c&0\:®%euu,cozfiefifiibexfififih$flfififififimae%fic
`
`%%oC®$5fifi%fi\fiXGfifi$fiflfifigfifififi‘$fl®§®fi§§°EE,80§
`
`fi%&:®€02&§8:5tfififihfi\fiaaafieofifltfiwfexmmfiwfifia%
`
`11597) C abicezuo tithe, tarafixmueeqna) C O 2 2: R 1 7 0 bwggzfifiifif’fiflififii
`
`1i, Eififlfifi‘éccatswflila 1 7 0hilflfiiiafifiififiifiiflabcigiRfl’wcrafifi?>5ma Lia/U5 8 5E%
`
`%u:®cozaficfifimfit&0\cogaamflfiflmfiwtd,cozofifimfifit
`
`$0,fifififlfifié%E%M$mmcaaemc&éo
`
`[0024]
`
`The present invention is to fill a refrigeration cycle apparatus with a low temperature working
`
`15—05-201 7
`
`9
`
`
`
`fluid comprising CO 2 and R 1 70 and containing 60% by weight or more of CO 2. At this time, in
`
`order to mix R1 70 with high azeotropy in a small amount range showing weak flammability, it is
`
`necessary to use a wide temperature range of operating conditions from the start of operation
`
`until obtaining the actual low temperature and C02 and arbitrary of C02 and lubricating oil for
`
`compressor In the mixing ratio, solubility with lubricating oil which is close to chemical structure
`
`can be improved, and oil return to the compressor of lubricating oil coexisting with CO 2 can be
`
`secured. Furthermore, because R1 70 is dissolved in the lubricating oil more than C02, a
`
`circulating composition having less R1 70 than the filled mixed composition, that is, a circulating
`
`composition containing more than 60% by weight of C02 is obtained, but in this composition
`
`range , Since C02 and R1 70 are more azeotropic, even if leakage from the refrigeration cycle
`
`device occurs, since the mixing ratio of CO2 and R170 hardly changes at the time of leakage, It is
`
`possible to reduce the possibility that flammable properties appear.
`
`[0024]$%%u.coztR170#6&0.60$§%u:®cozafiflfifiWflfi
`
`Wé.fififi4b»%fimfifiiéeoc%%oC®a%.#fifi®%mR170%%flmfi&
`
`fifi9fiofiflcfiéfiakb.Efi%%be$%®fifiafiaicofifififiofiwfififi¥
`
`cozbEfifififififioEfimfié$éufimf.mififimmfimfifimtofififiéwfi
`
`ca.C02tfififiefifimefi%moixwu9—yefififiecaficaéo35mm
`
`. C O 2 cl: 0 zE§< R 1 7 Ohifflrfiitami’fifififiékwc. mamas/exam: 0 23R 1 7 0039‘
`
`fiwfifimfi.fitbfie0§%%;0%§wcozafiflfifimfiatsfi.:oafifimfi
`
`fined.cozaR170ugbfimfifi%<&%k@.ebfififi%bw%fibe®fififi
`
`Ecohkbfe.fififimcozaRl70ofifififififith£§mfiacafifimkb.
`
`fimmifiwfiflmfiwfigfifiméflfifiéfificaa.
`
`[0025]
`
`The present invention fills a refrigeration cycle apparatus comprising CO 2 and R 1 70 and
`
`operating a low temperature working fluid containing 60 wt% or more of CO 2 at a condensing
`
`temperature of 18 ° C. or less. Since the condensation temperature operates at 18 ° C or lower,
`
`the low-temperature working fluid consisting of CO 2 and R 170 necessarily has a condensation
`
`process and has high condensation heat transfer performance as a refrigerant, so it is possible to
`
`miniaturize the equipment including the heat exchanger It is possible to do. In the present
`
`invention, the evaporation temperature is not specified, but at the evaporation temperature of —
`
`56.6 ° C. or less, which is the triple point of carbon dioxide, part of CO 2 freezes as dry ice, so it
`
`is used as a cold storage heat device It is also possible.
`
`[0025]$fi%d.cozaR170#6tb.60§%%ML®cozafiUfifiWEm
`
`We.fififigfiis°chcEWfiafififixbw%fimfififiscopes,fififigfi
`
`18°CMT?EW¢%E®.cozaR170@6tgfifiWflmwu.%ffi%fifié%5
`
`.fifiabroawfifififififiaeocawe.flfifi%&fiflfi%&wflmfiacafimfi
`
`6&6:fififimfiwffifififififififibfwfimfi.:%kfii®3$fifi§é
`
`15-05—201 7
`
`10
`
`
`
`— 5 6.
`
`6 ° CLXTODZEfii’EJELCELVCLi. C o 2 fleas F547/rz &: L'Cikn’fié'd’zurcb. g
`
`fifi§fia L'CiFIJfiH'atza : é: efiififi’ézfiéo
`
`[002m
`
`Furthermore, the present invention relates to a refrigeration cycle apparatus in which a low-
`
`temperature working fluid composed of CO 2 and R 1 70 is operated at a condensing temperature
`
`of 18 ° C. or lower and an evaporation temperature of 66.6 ° C. or higher, which is a triple
`
`point of carbon dioxide As shown in FIG. This prevents the risk of solidification of C0 2 on the
`
`evaporation side together with high condensation heat transfer performance on the condensation
`
`side and has high evaporative heat transfer performance, so it is possible to downsize the
`
`equipment including the heat exchanger and to maintain stable low temperature Can be
`obtained.
`
`[0 0 2 6] a ecczlxfiééfifici. c o 2 2: R 1 7 0 bxefiélfiifii’fiflififika fififififfifi‘
`
`1 8° CLXT'G. fifi?fir§bfi:%ltifi$®3§fica§%— 5 6. 6° CLXL'GEl’Ffi‘eflfifi/w
`
`lb%filifiififi‘é EEOD'E‘ZFgéo Cruz; 0 . ammo-suwameafifiaa é: 251:. ifilflljc
`
`c o 2 hilfilfieféfififlfimbf. fivfifilfifllfitfiae 11972295. aimeeeeeeewgm
`
`or. fifibfdfiiflflse : abifiifiattnzuo
`
`[OOZfl
`
`Furthermore, the present invention is a two—way refrigeration cycle apparatus in which a low—
`
`temperature working fluid comprising CO 2 and R 170 is used as a low-stage refrigeration cycle
`
`refrigerant operating at a condensing temperature of 18 ° C. or less. In order to perform cooling
`
`to a very low temperature of minus several tens of degrees, a two—way refrigeration cycle
`
`apparatus combining a high—temperature cycle on the high—temperature side and a low—stage
`
`cycle on the low temperature side is convenient and constitutes a cascade condenser Cooling to a
`
`very low temperature can be achieved by cooling the condenser in the low—stage cycle likewise
`
`constituting the cascade condenser with the high—stage evaporator. By using a low temperature
`
`working fluid composed of CO 2 and R 170 as a refrigerant for a low-stage refrigeration cycle
`
`operating at a condensing temperature of 18 ° C. or less, it has high condensation heat transfer
`
`performance of cascade condensers, so it includes a heat exchanger It is possible to downsize the
`
`equipment.
`
`[0 0 2 7] E alzflifi’éfifiai. c o 2 2: R 1 7 0 imefc‘zafiifii’lffibiiflzta fifitfiifiifib‘i
`
`1 8 ° CLXTTEUl’F‘é‘élfiEEfiQK‘ififi/fibfl/fiififiéfi L‘Z‘Ffibv'é 2 fi®fi¥$fi17flx§ficabé
`
`
`"sf/r ixifirfize In 5 aFfibaifitz‘i’EJfiawfiafifléfi 5 E2251: 1:. eismuoeéswr 721» 211112
`
`o
`
`models/r 7}l/&%E59~/E\ubfl‘fc 2 fiofarfifi/r fiJI/%EWE$IJ'€35 O . fix/7H F :1 yer/47L
`
`efififiaegfix 71b®z§§§2§¢c A: 0 . E I: < 23217— F :1 yi—“yfirfrtfilfiifi‘afifififixr 711/
`
`@fifififigei’fififlfie : é: actor. akficdfiwifigmmafiflefii C tb‘filfifitteo c o 2 5:
`
`15-05—201 7
`
`1 1
`
`
`
`R 1 7 0 bwefaelfiifilfibififiia Wtfiifigyb‘il 8 ° CLXT'cim’FfirzufiEEfimafifi/rmwma
`
`fiaurmwéaawgof.fiX#HF:y?yfi®%wfifififlfifiaeocaha.fifi
`
`m%aeee%awflmaazafim%eeao
`
`[0028]
`
`Furthermore, the present invention uses a high—pressure type compressor in a refrigeration cycle
`
`apparatus for filling a low-temperature working fluid comprising CO 2 and R l 70. In a
`
`refrigeration cycle apparatus which performs cooling to an extremely low temperature of minus
`
`several tens of degrees, the evaporation temperature gradually lowers in the operation state from
`
`the start of operation until obtaining the actual low temperature. At this time, if a low—pressure
`
`type compressor is used, the viscosity of the compressor lubricating oil staying in the compressor
`
`rises extremely as the temperature lowers, thereby increasing the power consumption of the
`
`compressor. Therefore, by using a high—pressure type compressor, the inside of the high—pressure
`
`shell in which the lubricating oil stays is always exposed to high-temperature and high—pressure
`
`discharge gas during compression, so that selection of lubricating oil and viscosity control are
`
`facilitated. Further, even if CO 2 having a high specific gravity or the liquid refrigerant of R 1 70
`
`is partially dissolved and stayed in the lower part of the lubricating oil in the compressor at the
`
`time of stoppage, CO 2 and R 1 70 are quickly vaporized at the start of the compressor , The
`
`lubricating oil having an appropriate viscosity is supplied to the compression mechanism in the
`
`compressor, so that the problem of reliability can be greatly reduced. Further, in the refrigeration
`
`cycle apparatus according to the present invention, by providing an oil separator on the
`
`discharge side of the compressor or a branch circuit extending from the outlet of the condenser
`
`(or cooler) to the compressor, the compressor discharged together with the refrigerant
`
`Lubricating oil can be prevented from staying in an evaporator having a very low temperature of
`
`minus several tens of degrees, which is safer.
`
`[oozslaBM$fiwd.cozaRi70b6téfifi¢flfiwafififiafififi%bw
`
`£Ec.%Efl47®Efifiéfififiaewc%eoV4fxfi+fitwfififimfiwfifimw
`
`fiflefiéfififixfiw%fimfiwtu.Efifimbefifiwfifiafiéicmfifififiufim
`
`T.fi%fi§@%&mfifimfiaoawtafiEfixwafifiemwTwea.%®$mfi%
`
`aaEfifimfifimmfifiu.fifiugawohffifimifib.Emfimfififihafikéfi
`
`éewttéoLtfiof.EEéxwafifiefimiéatmaof.fifimwfi%iéfi
`
`EylwWaEfifiwafingdmfizwmtéEénakb.fifimwfififififififififi
`
`garage irclejtflamflffiifith'c. ttfiwfiwc o 2 $12 1 7 0 @irfiiafiib‘ieafiafiffififiafio
`
`ffififi®T%tfi%bfwktbfe.Efifififl%mC02$R17ofififibmfimb.
`
`fifi®fifiaeokfifimfiEfifim®Emfifitfifianakw.Efifiwfifiagmufim
`
`“$39 C tb‘filfi‘fi’l‘iafgzwo ‘5 golfifififilafiéfilfifi/r 72b%fili. EifilfiFfittflififlwiflflfififififiv‘e
`
`.fifi%(ikdfifl%)mmbegfifiufléfifififié%umfi.fifiae%u%mahé
`
`Efifimflfimfi.?4%Xfi+fitw5#fitfimfigwfififimfimffi%fieaaafim
`
`?%T.;Dfi£c5éo
`
`15-05—201 7
`
`12
`
`
`
`[0029]
`
`Furthermore, the present invention uses a compressor lubricating oil having a viscosity grade of
`
`5 centistokes or more at 100 ° C. using a high pressure type compressor filled with a low
`
`temperature working fluid comprising CO 2 and R 170 It is a refrigeration cycle device. Here, a
`
`lubricating oil having a viscosity grade of 5 centistokes or more at 100 ° C. has a viscosity grade
`
`of about 50 centistokes or more at 40 ° C. although it can not be said definitely because the
`
`viscosity index varies depending on the type of lubricating oil . When such a lubricating oil
`
`having a viscosity grade of 5 centistokes or more at 100 ° C. and a low temperature working
`
`fluid composed of C0 2 and R 1 70 coexist, in the operating state, R 170 is selectively dissolved in
`
`the lubricating oil and lubricating The viscosity of the oil decreases. That is, the compressor is
`
`started from a state in which R170 is selectively dissolved in lubricating oil at room temperature
`
`and the viscosity of the lubricating oil is lowered, and the temperature of the lubricating oil,
`
`which is constantly exposed to high temperature and high pressure discharged gas during
`
`compression in the high pressure shell And the viscosity of the lubricating oil is further
`
`decreased. However, if a lubricating oil having a viscosity grade of 5 centistokes or more at 100
`
`C. is selected, reliability can be guaranteed. Although the upper limit of the viscosity grade is
`
`not specified, about 20 centistokes or less at 100 ° C. is suitable for preventing an increase in
`
`power consumption due to sliding friction. The lubricating oil for a compressor may be a single
`
`base oil such as a naphthenic or paraffinic mineral oil, an alkylbenzene oil, an ether oil, an ester
`
`oil, a polyalkylene glycol oil, or a carbonate oil, or a mixture of these base oils Of course it is
`
`good.
`
`[0 0 2 9] aeczaxfififlaat. c o 2 2:R17 0b\6f;:%lfiEiEl’F§biffi12k7E3%iEL/. glass/(7°03
`
`Efifiifiafififi L.
`
`1 0 0 ° C? 5 tyatx FHOZLXLODHJEVl/H 55595551551511.5155
`
`fiflfiaiaiifiX71b§Eca550 : (:5.
`
`1 0 0 ° C? 5 Jayex b—fixuioifihfifi‘b—
`
`555915515131. WfiifiiflmfiificcioTiléfiJi-Ei‘éfizefltéfcbefllcéztwfi. 4 0° C’C“
`
`1:1515‘5 0 5/52 b—bXLXJioiéalfifi‘lz— 1472459.
`
`:0); 5 5:10 0 ° C? 5 Jeyatx t
`
`~9xuio¥5§filx~ 5559155152.
`
`(3 o 2 2: R 1 7 0 5522551515511552515555
`
`>5 1:. fifiiififisccfimfli, R 1 7 0biffiifiiflalcigmfi’wdfififibfffiifi'iflammgcfliw'iz)o '9“
`
`5335. fiifii'éR 1 7 0 bifflfiimcigififi’ycdsfifiLtififiifiiflawtfirfim‘flfl?brcfiifiEWEEXtfiieh‘i
`
`E53511. rev}?IJbW’GEtfificc‘efiEEmttmfixc:55:5Béhéifififiifiamflgmsfifil
`
`eat: 0. E eczfflifiifimfifihilflrfiam 1 0 0 ° CT} 5 tyaix b—fixuiafiéflilfifi‘l/
`
`HF%5Ofifi%&§ibffiwflfififii®%fififiah%505%63fiEVDHFGLE
`
`ccom'ccitliaczififibtzmfii
`
`1 0 0° c132 Ofiyatx b—bXLXTEJEb“. issbgficzaa
`
`ifififihwfikafifiifiz’; 0353551135250 iszfiaififififfiifiiflac‘: Last. 7L7viy¥=5<51<57
`
`4V%®%fl.7W$WNV€Vm\I—?WE.IX?WE\fiU7b$bV5U:—wm\
`
`fiHfl‘l‘iH NHL 25035550351555.th Cflg®ifiéiflflfi%ib\c adiEEflEE/uo): 2:“6‘
`
`$50
`
`15-05—201 7
`
`13
`
`
`
`[0030]
`
`(Embodiment 1) This embodiment shows the refrigeration performance of a two—component low—
`
`temperature working fluid comprising carbon dioxide (CO 2) and ethane (R 1 70), which is
`
`excellent when used as a refrigerant of a refrigeration cycle apparatus The characteristics are
`shown.
`
`[0030](%m®%%1)$%fl®%%d.:fimfii(coz)3I9V(R170)#
`
`Bt%2fifi%®flfi¢flfifi®fifififi fib.fififi47¢%fi®fifi&bffim%%fi®
`
`Emk%fi%fi?%®c5%0
`
`[003M
`
`FIG. 1 sho
Accessing this document will incur an additional charge of $.
After purchase, you can access this document again without charge.
Accept $ ChargeStill Working On It
This document is taking longer than usual to download. This can happen if we need to contact the court directly to obtain the document and their servers are running slowly.
Give it another minute or two to complete, and then try the refresh button.
A few More Minutes ... Still Working
It can take up to 5 minutes for us to download a document if the court servers are running slowly.
Thank you for your continued patience.
This document could not be displayed.
We could not find this document within its docket. Please go back to the docket page and check the link. If that does not work, go back to the docket and refresh it to pull the newest information.
Your account does not support viewing this document.
You need a Paid Account to view this document. Click here to change your account type.
Your account does not support viewing this document.
Set your membership
status to view this document.
With a Docket Alarm membership, you'll
get a whole lot more, including:
- Up-to-date information for this case.
- Email alerts whenever there is an update.
- Full text search for other cases.
- Get email alerts whenever a new case matches your search.
One Moment Please
The filing “” is large (MB) and is being downloaded.
Please refresh this page in a few minutes to see if the filing has been downloaded. The filing will also be emailed to you when the download completes.
Your document is on its way!
If you do not receive the document in five minutes, contact support at support@docketalarm.com.
Sealed Document
We are unable to display this document, it may be under a court ordered seal.
If you have proper credentials to access the file, you may proceed directly to the court's system using your government issued username and password.
Access Government Site