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WO1994000529A1 - Compositions refrigerantes contenant 1,1,1,2,3,3,3-heptafluoropropane - Google Patents

Compositions refrigerantes contenant 1,1,1,2,3,3,3-heptafluoropropane Download PDF

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Publication number
WO1994000529A1
WO1994000529A1 PCT/US1993/006043 US9306043W WO9400529A1 WO 1994000529 A1 WO1994000529 A1 WO 1994000529A1 US 9306043 W US9306043 W US 9306043W WO 9400529 A1 WO9400529 A1 WO 9400529A1
Authority
WO
WIPO (PCT)
Prior art keywords
heptafluoropropane
tetrafluoroethane
refrigerant
trifluoroethane
refrigerant composition
Prior art date
Application number
PCT/US1993/006043
Other languages
English (en)
Inventor
Mark L. Robin
Original Assignee
Great Lakes Chemical Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Great Lakes Chemical Corporation filed Critical Great Lakes Chemical Corporation
Priority to AU46495/93A priority Critical patent/AU4649593A/en
Publication of WO1994000529A1 publication Critical patent/WO1994000529A1/fr

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Classifications

    • 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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to refrigeration and refrigerants, more particularly to the use of refrigerants containing 1,1,1,2,3,3 ,3-heptafluoropropane.
  • the mixtures of the present invention have essentially no effect on stratospheric ozone and are useful as refrigerants for heating and cooling applications.
  • Refrigeration or heating can be described as the utilization of a physical change in a substance to produce a cooling or heating effect.
  • a method for producing refrigeration comprises condensing a suitable agent, and thereafter evaporating the agent in the vicinity of the body to be cooled.
  • agents may be utilized for producing heat by condensing the agent in the vicinity of the body to be heated, and thereafter evaporating the agent.
  • CFCs chlorofluorocarbons
  • R12 dichlorodifluoromethane
  • R22 chlorodifluoromethane
  • Additional compounds which have been proposed include the halocarbons difluoromethane (R32), 1,1,1-trifluoroethane (R143a), 1,1,2-trifluoroethane (R143), and 1,1-difluoroethane (R152a) .
  • R32 halocarbons difluoromethane
  • R143a 1,1,1-trifluoroethane
  • R143 1,1,2-trifluoroethane
  • R152a 1,1-difluoroethane
  • Hydrocarbons such as methane (R50), ethane (R170), propane (R290), and butane (R600) have also been employed as refrigerants, but their uses are severely restricted due to their high flammability.
  • refrigerant compositions including 1,1,1,2,3,3,3-heptafluoropropane and one or more of methane, ethane, propane, butane, difluoromethane, 1,1-difluoroethane, 1,1,1-trifluoroethane and 1,1,2-trifluoroethane, dimethyl ether, isobutane, 2-chloro-l,1,1,2-tetrafluoroethane, pentafluoroethane, 1,1,2,2-tetrafluoroethane, 1,1,1,2-tetrafluoroethane and cyclopropane.
  • compositions display good refrigerant properties, and are nontoxic, non-ozone depleting and nonflammable.
  • Computer-based models have substantiated that these compounds have no effect on stratospheric ozone, i.e., their ozone depletion potential (ODP) is zero.
  • ODP ozone depletion potential
  • 1,1,1,2,3,3,3-heptafluoropropane in admixture with a second compound selected from the group consisting of methane (R50), ethane (R170), difluoromethane (R32),
  • compositions comprise from about 10 to about 90 weight percent 1,1,1,2,3,3,3-heptafluoropropane and from about 90 to about 10 weight percent of the second compound. It is a feature of one aspect of the present invention that the
  • 1,1,1,2,3,3,3-heptafluoropropane in combination with a second refrigerant which is itself a flammable compound yields a non-flammable mixture having desirable refrigerant properties.
  • the refrigerant mixtures of the present invention are useful in compression cycle applications including air conditioner and heat pump systems, and are useful for producing both cooling and heating.
  • the refrigerant mixtures comprise from about 20 to 80 weight percent 1,1,1,2,3,3,3-heptafluoropropane, and from about 80 to 20 weight percent of a second compound selected from the group consisting of difluoromethane (R32),
  • Mixtures containing larger percentages of 1,1,1,2,3,3,3-heptafluoropropane exhibit wider ranges of nonflammability, whereas those mixtures rich in the second component offer advantages in increased refrigerant volumetric capacity.
  • the mixture compositions can be readily tailored to produce a refrigerant fluid capable of meeting the flammability and performance requirements of a particular cooling or heating application.
  • nonflammable mixtures may be obtained upon combination of 1,1,1,2,3,3,3-heptafluoropropane with flammable compounds such as R32, R143a, R143, R152a, R170, R50, R290, R600, dimethyl ether and isobutane.
  • flammable compounds such as R32, R143a, R143, R152a, R170, R50, R290, R600, dimethyl ether and isobutane.
  • R32 1,1,1,2,3,3,3-heptafluoropropane and difluoromethane
  • Difluoromethane (R32) is known in the art, and has seen some application as a refrigerant. Its uses as a refrigerant are limited, however, due to its flammability and also due to its high vapor pressure. Mixtures of 1, 1,1,2,3,3,3-heptafluoropropane and R32 are particularly advantageous as such mixtures can serve as drop-in replacements for R22 in heat pump applications, providing a nonflammable refrigerant characterized by discharge pressures low enough to allow use of the mixture in conventional heating and cooling equipment.
  • vapor compression cycle calculations indicate a 30:70 by weight mixture of R32 and 1,1,1,2,3,3,3-heptafluoropropane offers essentially identical energy efficiency as R22, and has a volumetric capacity virtually identical to that of R22. This matching of the volumetric capacities allows the use of the mixture without having to change the compressors currently employed in R22 systems.
  • Mixtures of 1,1,1,2,3,3,3-heptafluoropropane and R32 containing greater than 30 weight percent of R32 are characterized by volumetric capacities greater than that of R22, allowing the use of smaller, less expensive compressors.
  • Additional mixtures of this invention of particular advantage are those of 1,1,1,2,3,3,3-heptafluoropropane and R152a. These can be readily employed as a replacement for R12 in refrigerator-freezer systems. Such mixtures are capable of providing energy efficiency comparable to or better than that of R12, and have essentially identical volumetric refrigerant capacity.
  • the inventive mixtures are useful in both heating and cooling applications.
  • the mixtures of this invention may be used, in the presence of a suitable lubricant if required, in a method for producing refrigeration which comprises condensing the mixtures and thereafter evaporating the mixtures in the vicinity of a body to be cooled.
  • the mixtures of the invention may be used, in the presence of a suitable lubricant if required, in a method for producing heat which comprises condensing the mixture in the vicinity of a body to be heated, and thereafter evaporating the mixture.
  • the usefulness of a material as a heat pump fluid is usually expressed as a coefficient of performance (COP) , defined as the ratio of quantity of heat extracted to the amount of work expended.
  • COP coefficient of performance
  • the COP is a universally accepted measure useful in representing the relative thermodynamic efficiency of a refrigerant in a specific cooling or heating cycle.
  • ⁇ g . cit. - the COP of a fluid may be estimated from the thermophysical properties of the fluid (e.g., vapor pressure curve, molecular weight, vapor and liquid specific heats, etc.).
  • the performance of a refrigerant mixture at specific operating conditions can be derived from the thermodynamic properties of the refrigerant mixture using standard techniques, such as those described for example by R.C. Downing in "Fluorocarbon Refrigerant Handbook," Chapter 3, Prentice-Hall (1988).
  • refrigerant performance can be derived from a knowledge of the thermophysical properties of the fluid employing the CYCLE7 or CYCLEll methods developed by the National Institute of Science and Technology (NIST) , or via the techniques described in S. Fisher and J.
  • compositions may include additional, non-interfering components, for example lubricants, so as to form new refrigeration mixtures. Any such compositions are considered to be within the scope of the present invention.
  • the present invention is more fully illustrated by the following examples, which are to be understood as exemplary only, and non-limiting.
  • the performance of a 50:50 by weight mixture of R227ea and R152a was evaluated in a commercial upright refrigerator-freezer as described in Example 3, employing a 4.8 ounce charge of the 50:50 mixture.
  • the observed COP was 1.19 and the volumetric capacity was determined to be 590 BTU/h. Power consumption was measured to be 1.92 KWh/day.
  • the mixtures are capable of providing energy efficiency and volumetric capacity equal or superior to that of R22.
  • a 30:70 weight percent mixture of R32 and R227ea for example can serve as a drop-in replacement for R22, providing virtually identical efficiency (COP) and volumetric capacity.
  • the performance of a 70:30 by weight mixture of R227ea and dimethyl ether was evaluated in a commercial upright refrigerator-freezer as described in Example 3, employing a 5 3.6 ounce charge of the 70:30 mixture.
  • the observed COP was 1.14 and the volumetric capacity was 460 BTU/h. Power consumption was measured to be 1.99 KWh/day.
  • the mixtures are capable of providing efficiencies (COP) approaching or exceeding that of R22, and are in general characterized by lower discharge pressues and temperatures, leading to more reliable compressor operation and longer compressor life.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Des compositions réfrigérantes comprenent un mélange de 1,1,1,2,3,3,3-heptafluoropropane, et de un ou plusieurs composés sélectionnés dans le groupe comprenant le méthane, l'éthane, le propane, le butane, le difluorométhane, 1,1-difluoroéthane, 1,1,1-trifluoroéthane, 1,1,2-trifluoroéthane, le diméthyle éther, l'isobutane, 2-chloro-1,1,1,2-tétrafluoroéthane, le pentafluoroéthane, 1,1,2,2-tétrafluoroéthane, 1,1,1,2-tétrafluoroéthane et le cyclopropane. De préférence, 1,1,1,2,3,3,3-heptafluoropropane est compris de préférence à raison de 10 environ à 90 pourcent environ en poids dans la composition, et un lubrifiant peut également être présent. Des procédés de refroidissement et de chauffage utilisant de telles compositions sont également décrits.
PCT/US1993/006043 1992-06-25 1993-06-24 Compositions refrigerantes contenant 1,1,1,2,3,3,3-heptafluoropropane WO1994000529A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU46495/93A AU4649593A (en) 1992-06-25 1993-06-24 Refrigerant blends containing 1,1,1,2,3,3,3-heptafluoropropane

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US90390892A 1992-06-25 1992-06-25
US07/903,908 1992-06-25
US91659992A 1992-07-20 1992-07-20
US07/916,599 1992-07-20

Publications (1)

Publication Number Publication Date
WO1994000529A1 true WO1994000529A1 (fr) 1994-01-06

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PCT/US1993/006043 WO1994000529A1 (fr) 1992-06-25 1993-06-24 Compositions refrigerantes contenant 1,1,1,2,3,3,3-heptafluoropropane

Country Status (5)

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CN (1) CN1083508A (fr)
AU (1) AU4649593A (fr)
IL (1) IL106132A0 (fr)
TW (1) TW281693B (fr)
WO (1) WO1994000529A1 (fr)

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0693541A1 (fr) * 1994-07-19 1996-01-24 Elf Atochem S.A. Mélanges non azéotropiques de difluorométhane, trifluorométhane et 1,1,1,2-tétrafluoroéthane, et leur application comme fluides frigorigènes
WO1997011138A1 (fr) * 1995-09-21 1997-03-27 Goble George H Produit de substitution a incorporation directe pour refrigerant au dichlorofluoromethane
EP0779351A1 (fr) * 1995-12-14 1997-06-18 AUSIMONT S.p.A. Mélanges pseudo-azéotropiques de fluorocarbures hydrogénés et d'hydrocarbures destinés à être utilisés comme propulseur pour aérosol
EP0779352A1 (fr) * 1995-12-14 1997-06-18 AUSIMONT S.p.A. Compositions ternaires pseudo-azéotropiques de fluorocarbures hydrogénés et d'hydrocarbures destinés à être utilisés comme fluides de réfrigération
WO1997034961A1 (fr) * 1996-03-22 1997-09-25 Goble George H REFRIGERANTS INTRODUITS DANS UN SYSTEME DE REFRIGERATION POUR SUBSTITUER LE REFRIGERANT 1,1,1,2-TETRAFLUOROETHANE (R-134a)
US5672293A (en) * 1994-03-11 1997-09-30 E. I. Du Pont De Nemours And Company Hydrofluorocarbon compositions
US5688432A (en) * 1993-09-22 1997-11-18 Star Refrigeration Limited Replacement refrigerant composition
WO1999025786A1 (fr) * 1997-11-18 1999-05-27 Alliedsignal Inc. Fluides frigorigenes hydrofluorocarbones
WO1999041325A1 (fr) * 1998-02-13 1999-08-19 Suk Jae Oho Composition refrigerante
US5968406A (en) * 1991-03-28 1999-10-19 E. I. Du Pont De Nemours And Company Azeotropic and azeotrope-like compositions of 1,1,2,2-tetrafluoroethane
US6056891A (en) * 1998-09-01 2000-05-02 Goble; George H. Drop-in performance increasing substitute for 1,1,1,2-tetrafluoroethane refrigerant
EP1001072A2 (fr) * 1998-11-13 2000-05-17 KKW Kulmbacher Klimageräte-Werk GmbH Pompe à chaleur pour séchoir à linge domestique
US6248255B1 (en) * 1995-11-07 2001-06-19 Star Refrigeration Limited Centrifugal compression refrigerant composition
WO2002024829A1 (fr) * 2000-09-19 2002-03-28 Rhodia Organique Fine Limited Compositions refrigerantes de compression centrifuge
RU2184133C2 (ru) * 2000-04-20 2002-06-27 Федеральное государственное учреждение Всероссийский научно-исследовательский институт противопожарной обороны Композиция хладагента
US6524495B1 (en) * 1999-11-10 2003-02-25 Korea Institute Of Science And Technology Refrigerant mixture comprising difluromethane, pentafluroethane and 1,1,1-trifluoroethane
US6531441B1 (en) 1994-03-11 2003-03-11 E. I. Du Pont De Nemours And Company Hydrofluorocarbon compositions
ES2185494A1 (es) * 2001-07-11 2003-04-16 Dinagas S A Mezcla refrigerante sustituta del diclorodifluorometano.
US6692653B2 (en) * 2001-02-16 2004-02-17 Korea Institute Of Science And Technology Refrigerant composition
US6875370B2 (en) 1996-03-05 2005-04-05 George H. Goble Drop-in Substitutes for dichlorodifluoromethane refrigerant
US6958126B2 (en) * 2002-06-27 2005-10-25 Goble George H Non-flammable, non-ozone depleting refrigerant mixtures suitable for use in mineral oil (GHGX9)
US6991743B2 (en) * 2002-03-19 2006-01-31 Rpl Holdings Limited Refrigerant for centrifugal compressors
KR100633730B1 (ko) 2005-05-13 2006-10-13 함윤식 알12 대체 2원 혼합냉매
US7229567B2 (en) 1997-07-15 2007-06-12 E.I. Dupont De Nemours And Company Refrigerant compositions
US7258813B2 (en) 1999-07-12 2007-08-21 E.I. Du Pont De Nemours And Company Refrigerant composition
US7276176B2 (en) 2002-10-11 2007-10-02 E. I. Du Pont De Nemours And Company Refrigerant compositions
US7641810B2 (en) 2002-11-29 2010-01-05 Neil Andre Roberts Refrigerant compositions
DE202010014196U1 (de) * 2010-10-13 2011-03-17 Lauda Dr.R.Wobser Gmbh&Co.Kg Kältemittel auf der Basis mindestens eines nicht halogenierten brennbaren Kohlenwasserstoffs
US8097182B2 (en) 2009-06-17 2012-01-17 A.S. Trust & Holdings, Inc. Hydrocarbon refrigerant and detergent composition
WO2014076475A3 (fr) * 2012-11-13 2014-09-12 Rpl Holdings Limited Additif de réfrigérant
US8999191B2 (en) 2013-03-15 2015-04-07 National Refrigerants, Inc. R22 replacement refrigerant

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AU7276996A (en) * 1995-10-20 1997-05-15 Beijing Inoue Qinghua Freeze Technology Co. Ltd Refrigerant
CN101020812B (zh) * 2007-03-14 2011-12-28 山东东岳化工有限公司 一种环保制冷剂组合物
CN105985754A (zh) * 2015-03-02 2016-10-05 珠海兴业新能源科技有限公司 一组低温热泵用高效环保型混合工质
CN106543966A (zh) * 2016-10-28 2017-03-29 湖北绿冷高科节能技术有限公司 一种替代r‑134a的制冷剂及其制备方法
CN107118746B (zh) * 2017-05-25 2020-04-28 华南理工大学 一种环保的混合制冷剂及其制备方法
CN110591650B (zh) * 2019-09-12 2020-09-25 珠海格力电器股份有限公司 一种适用于离心式制冷机组的热传递组合物
CN110819304B (zh) * 2019-10-16 2020-10-30 珠海格力电器股份有限公司 一种低可燃性换热介质和换热系统

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JPH0393890A (ja) * 1989-09-06 1991-04-18 Daikin Ind Ltd 作動流体
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Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5968406A (en) * 1991-03-28 1999-10-19 E. I. Du Pont De Nemours And Company Azeotropic and azeotrope-like compositions of 1,1,2,2-tetrafluoroethane
US5688432A (en) * 1993-09-22 1997-11-18 Star Refrigeration Limited Replacement refrigerant composition
EP1118648A2 (fr) * 1994-03-11 2001-07-25 E.I. Du Pont De Nemours And Company Compositions d'hydrofluorocarbones
US6846792B2 (en) 1994-03-11 2005-01-25 E. I. Du Pont De Nemours And Company Hydrofluorocarbon compositions
EP1118648A3 (fr) * 1994-03-11 2005-01-26 E.I. Du Pont De Nemours And Company Compositions d'hydrofluorocarbones
US5672293A (en) * 1994-03-11 1997-09-30 E. I. Du Pont De Nemours And Company Hydrofluorocarbon compositions
US6531441B1 (en) 1994-03-11 2003-03-11 E. I. Du Pont De Nemours And Company Hydrofluorocarbon compositions
US5785883A (en) * 1994-03-11 1998-07-28 E. I. Du Pont De Nemours And Company Hydrofluorocarbon compositions with tetrafluoroethane and cyclopropane
EP0693541A1 (fr) * 1994-07-19 1996-01-24 Elf Atochem S.A. Mélanges non azéotropiques de difluorométhane, trifluorométhane et 1,1,1,2-tétrafluoroéthane, et leur application comme fluides frigorigènes
WO1997011138A1 (fr) * 1995-09-21 1997-03-27 Goble George H Produit de substitution a incorporation directe pour refrigerant au dichlorofluoromethane
US6248255B1 (en) * 1995-11-07 2001-06-19 Star Refrigeration Limited Centrifugal compression refrigerant composition
US5766511A (en) * 1995-12-14 1998-06-16 Ausimont S.P.A. Near-azeotropic compositions constituted by hydrogenated fluorocarbons and hydrocarbons, suitable as propellant fluids for aerosol
US6695973B1 (en) 1995-12-14 2004-02-24 Solvay Solexis S.P.A. Near-azeotropic ternary compositions constituted by hydrogenated fluorocarbons and hydrocarbons, suitable as refrigerating fluids
EP0779351A1 (fr) * 1995-12-14 1997-06-18 AUSIMONT S.p.A. Mélanges pseudo-azéotropiques de fluorocarbures hydrogénés et d'hydrocarbures destinés à être utilisés comme propulseur pour aérosol
EP0779352A1 (fr) * 1995-12-14 1997-06-18 AUSIMONT S.p.A. Compositions ternaires pseudo-azéotropiques de fluorocarbures hydrogénés et d'hydrocarbures destinés à être utilisés comme fluides de réfrigération
USRE42652E1 (en) 1995-12-14 2011-08-30 Solvay Solexis Spa Near-azeotropic ternary compositions constituted by hydrogenated fluorocarbons and hydrocarbons, suitable as refrigerating fluids
US6875370B2 (en) 1996-03-05 2005-04-05 George H. Goble Drop-in Substitutes for dichlorodifluoromethane refrigerant
US5954995A (en) * 1996-03-22 1999-09-21 Goble; George H. Drop-in substitutes for 1,1,1,2-tetrafluoroethane (R-134a) refrigerant
WO1997034961A1 (fr) * 1996-03-22 1997-09-25 Goble George H REFRIGERANTS INTRODUITS DANS UN SYSTEME DE REFRIGERATION POUR SUBSTITUER LE REFRIGERANT 1,1,1,2-TETRAFLUOROETHANE (R-134a)
US7229567B2 (en) 1997-07-15 2007-06-12 E.I. Dupont De Nemours And Company Refrigerant compositions
WO1999025786A1 (fr) * 1997-11-18 1999-05-27 Alliedsignal Inc. Fluides frigorigenes hydrofluorocarbones
WO1999041325A1 (fr) * 1998-02-13 1999-08-19 Suk Jae Oho Composition refrigerante
US6056891A (en) * 1998-09-01 2000-05-02 Goble; George H. Drop-in performance increasing substitute for 1,1,1,2-tetrafluoroethane refrigerant
EP1001072A3 (fr) * 1998-11-13 2000-10-25 KKW Kulmbacher Klimageräte-Werk GmbH Pompe à chaleur pour séchoir à linge domestique
EP1001072A2 (fr) * 1998-11-13 2000-05-17 KKW Kulmbacher Klimageräte-Werk GmbH Pompe à chaleur pour séchoir à linge domestique
US7258813B2 (en) 1999-07-12 2007-08-21 E.I. Du Pont De Nemours And Company Refrigerant composition
US6592774B2 (en) 1999-11-10 2003-07-15 Korea Institute Of Science And Technology Refrigerant mixture comprising difluromethane, pentafluroethane and 1,1,1-trifluoroethane
US6592773B2 (en) 1999-11-10 2003-07-15 Korea Institute Of Science And Technology Refrigerant mixture comprising difluromethane, pentafluroethane and 1,1,1-trifluoroethane
US6524495B1 (en) * 1999-11-10 2003-02-25 Korea Institute Of Science And Technology Refrigerant mixture comprising difluromethane, pentafluroethane and 1,1,1-trifluoroethane
RU2184133C2 (ru) * 2000-04-20 2002-06-27 Федеральное государственное учреждение Всероссийский научно-исследовательский институт противопожарной обороны Композиция хладагента
AU2000273021B2 (en) * 2000-09-19 2006-09-14 E.I. Du Pont De Nemours & Company Centrifugal compression refrigerant compositions
WO2002024829A1 (fr) * 2000-09-19 2002-03-28 Rhodia Organique Fine Limited Compositions refrigerantes de compression centrifuge
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CN1083508A (zh) 1994-03-09
TW281693B (fr) 1996-07-21
IL106132A0 (en) 1993-10-20
AU4649593A (en) 1994-01-24

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