JPS63305187A - Working medium mixture - Google Patents
Working medium mixtureInfo
- Publication number
- JPS63305187A JPS63305187A JP62140031A JP14003187A JPS63305187A JP S63305187 A JPS63305187 A JP S63305187A JP 62140031 A JP62140031 A JP 62140031A JP 14003187 A JP14003187 A JP 14003187A JP S63305187 A JPS63305187 A JP S63305187A
- Authority
- JP
- Japan
- Prior art keywords
- working medium
- medium mixture
- dichloro
- mixture
- dichlorodifluoroethane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 14
- SKDFWEPBABSFMG-UHFFFAOYSA-N 1,2-dichloro-1,1-difluoroethane Chemical compound FC(F)(Cl)CCl SKDFWEPBABSFMG-UHFFFAOYSA-N 0.000 claims abstract description 11
- OHMHBGPWCHTMQE-UHFFFAOYSA-N 2,2-dichloro-1,1,1-trifluoroethane Chemical compound FC(F)(F)C(Cl)Cl OHMHBGPWCHTMQE-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 abstract description 3
- IDSKMUOSMAUASS-UHFFFAOYSA-N 1,2-dichloro-1,2-difluoroethane Chemical compound FC(Cl)C(F)Cl IDSKMUOSMAUASS-UHFFFAOYSA-N 0.000 abstract description 2
- CZHYKKAKFWLGJO-UHFFFAOYSA-N dimethyl phosphite Chemical compound COP([O-])OC CZHYKKAKFWLGJO-UHFFFAOYSA-N 0.000 abstract description 2
- 239000012760 heat stabilizer Substances 0.000 abstract 1
- 238000005057 refrigeration Methods 0.000 description 17
- 239000012530 fluid Substances 0.000 description 11
- 238000011084 recovery Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- VLIDBBNDBSNADN-UHFFFAOYSA-N 1,1-dichloro-2,2-difluoroethane Chemical compound FC(F)C(Cl)Cl VLIDBBNDBSNADN-UHFFFAOYSA-N 0.000 description 2
- DDMOUSALMHHKOS-UHFFFAOYSA-N 1,2-dichloro-1,1,2,2-tetrafluoroethane Chemical compound FC(F)(Cl)C(F)(F)Cl DDMOUSALMHHKOS-UHFFFAOYSA-N 0.000 description 2
- YMRMDGSNYHCUCL-UHFFFAOYSA-N 1,2-dichloro-1,1,2-trifluoroethane Chemical compound FC(Cl)C(F)(F)Cl YMRMDGSNYHCUCL-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BOSAWIQFTJIYIS-UHFFFAOYSA-N 1,1,1-trichloro-2,2,2-trifluoroethane Chemical compound FC(F)(F)C(Cl)(Cl)Cl BOSAWIQFTJIYIS-UHFFFAOYSA-N 0.000 description 1
- AFTSHZRGGNMLHC-UHFFFAOYSA-N 1,1-dichloro-1,2,2-trifluoroethane Chemical compound FC(F)C(F)(Cl)Cl AFTSHZRGGNMLHC-UHFFFAOYSA-N 0.000 description 1
- OIQOUHIUUREZOM-UHFFFAOYSA-N 1,1-dichloro-1,2-difluoroethane Chemical compound FCC(F)(Cl)Cl OIQOUHIUUREZOM-UHFFFAOYSA-N 0.000 description 1
- NPNPZTNLOVBDOC-UHFFFAOYSA-N 1,1-difluoroethane Chemical compound CC(F)F NPNPZTNLOVBDOC-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- KUMNEOGIHFCNQW-UHFFFAOYSA-N diphenyl phosphite Chemical compound C=1C=CC=CC=1OP([O-])OC1=CC=CC=C1 KUMNEOGIHFCNQW-UHFFFAOYSA-N 0.000 description 1
- NFORZJQPTUSMRL-UHFFFAOYSA-N dipropan-2-yl hydrogen phosphite Chemical compound CC(C)OP(O)OC(C)C NFORZJQPTUSMRL-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 231100001231 less toxic Toxicity 0.000 description 1
- SYSQUGFVNFXIIT-UHFFFAOYSA-N n-[4-(1,3-benzoxazol-2-yl)phenyl]-4-nitrobenzenesulfonamide Chemical class C1=CC([N+](=O)[O-])=CC=C1S(=O)(=O)NC1=CC=C(C=2OC3=CC=CC=C3N=2)C=C1 SYSQUGFVNFXIIT-UHFFFAOYSA-N 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical class OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- WSANLGASBHUYGD-UHFFFAOYSA-N sulfidophosphanium Chemical class S=[PH3] WSANLGASBHUYGD-UHFFFAOYSA-N 0.000 description 1
- 229940029284 trichlorofluoromethane Drugs 0.000 description 1
- KTFAZNVGJUIWJM-UHFFFAOYSA-N trimethyl(sulfanylidene)-$l^{5}-phosphane Chemical compound CP(C)(C)=S KTFAZNVGJUIWJM-UHFFFAOYSA-N 0.000 description 1
- IKXFIBBKEARMLL-UHFFFAOYSA-N triphenoxy(sulfanylidene)-$l^{5}-phosphane Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=S)OC1=CC=CC=C1 IKXFIBBKEARMLL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、冷凍機、ヒートポンプ等に使用し得る新規な
作動媒体混合物に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel working medium mixture that can be used in refrigerators, heat pumps, etc.
［従来技術］
空調、冷凍および冷蔵機器（冷凍サイクル・ヒートポン
プサイクル）、廃熱回収発電（ランキンサイクル）、熱
交換機器（ヒートパイプ）等が実用化ないし試験開発さ
れている。[Prior Art] Air conditioning, refrigeration and refrigeration equipment (refrigeration cycle/heat pump cycle), waste heat recovery power generation (Rankine cycle), heat exchange equipment (heat pipe), etc. have been put into practical use or tested and developed.
これらの機器に用いる作動媒体には、水をはじめプロパ
ンやブタン等の炭化水素類、トリクロロモノフルオロメ
タン（Ｒ−１１）や、 １．２−ジクロロテトラフル
オロエタン（Ｒ−１１４）等のフロン類、又はアンモニ
ア等が知られている。The working media used in these devices include water, hydrocarbons such as propane and butane, and fluorocarbons such as trichloromonofluoromethane (R-11) and 1,2-dichlorotetrafluoroethane (R-114). , ammonia, etc. are known.
［発明の目的］
フロン類は毒性が少なく、非可燃性で化学的にも安定で
あり、沸点の異なる各種フロンが容易に入手できること
から１作動媒体としての評価研究が活発に行なわれてい
る０本発明者等は、熱回収効率（特に、冷凍庫、冷蔵庫
、冷暖房機器、給湯機器あるいは廃熱回収を目的とした
ヒートポンプなど）の高いフロン類の探索を進めた結果
、ジクロロトリフルオロエタンとジクロロジフルオロエ
タンとを必須成分とする作動媒体混合物が有効であるこ
とを見い出すことができた６本発明は、このような作動
媒体混合物を新規に提供するものである。[Purpose of the Invention] Freon is less toxic, non-flammable, and chemically stable, and various types of fluorocarbons with different boiling points are easily available, so evaluation research is being actively conducted as a working medium. As a result of our search for fluorocarbons with high heat recovery efficiency (particularly for freezers, refrigerators, air-conditioning equipment, hot water equipment, and heat pumps for the purpose of waste heat recovery), we discovered dichlorotrifluoroethane and dichlorodifluoroethane. It has been found that a working medium mixture having these as essential components is effective.The present invention provides a novel working medium mixture of this type.
［発明の構成］
本発明における。ジクロロトリフルオロエタンには、１
．１−ジクロロ−２，２，２−）リフルオロエタン（Ｒ
−１２３）、 １．２−ジクロロ−１，２，２−トリフ
ルオロエタン（Ｒ−１２３ａ）そして、１．１−ジクロ
ロ−１，２，２−トリフルオロエタン（Ｒ−１２３ｂ）
の３種の異性体が又、ジクロロジフルオロエタンには、
１，２−ジクロロ−１，２−ジフルオロエタン（Ｒ−１
３２）と１，１−ジクロロ−２，２−ジフルオロエタ７
（Ｒ−１３２ａ） 、 １．２−ジクロロ−１，１−
ジフルオロエタン（Ｒ−１３２ｂ）および、１．１−ジ
クロロ−１，２−ジフルオロエタン（Ｒ−１３２ｃ）の
４種の異性体が知られているが、それぞれの異性体は互
いに物性が類似しているため、これらを単独で用いても
よく、また、これらの混合物を用いてもよい、以下の説
明においてはＲ−１２３とＲ−１３２ｂを混合使用する
例を示す。[Structure of the Invention] In the present invention. For dichlorotrifluoroethane, 1
．． 1-dichloro-2,2,2-)lifluoroethane (R
-123), 1,2-dichloro-1,2,2-trifluoroethane (R-123a) and 1,1-dichloro-1,2,2-trifluoroethane (R-123b)
There are also three isomers of dichlorodifluoroethane:
1,2-dichloro-1,2-difluoroethane (R-1
32) and 1,1-dichloro-2,2-difluoroethane 7
(R-132a), 1,2-dichloro-1,1-
Four types of isomers are known: difluoroethane (R-132b) and 1,1-dichloro-1,2-difluoroethane (R-132c), but each isomer has similar physical properties. , these may be used alone, or a mixture thereof may be used. In the following description, an example will be shown in which a mixture of R-123 and R-132b is used.
以下１本発明の作動媒体を用いた冷凍サイクルシステム
のフローシートを示す第１図に従って本発明の詳細な説
明する。第１図の１は圧縮機、２は凝縮器、 ３．３′
は負荷流体用配管、４は減圧装置、５は蒸発器、 Ｂ、
６′は熱源流体用配管を示す。The present invention will be described in detail below with reference to FIG. 1, which shows a flow sheet of a refrigeration cycle system using the working medium of the present invention. 1 in Figure 1 is a compressor, 2 is a condenser, 3.3'
is the load fluid piping, 4 is the pressure reducing device, 5 is the evaporator, B,
6' indicates piping for heat source fluid.
第１図に示す冷凍サイクルシステムにおいて作動媒体は
圧縮機１で圧縮された後凝縮器２に導かれ、該凝縮器２
中で管３より導入される負荷流体により冷却されて凝縮
する。一方、負荷流体は凝縮器２中で逆に加熱され管３
′を経て負荷加熱に供される。つぎに凝縮した作動媒体
は減圧装置４により減圧された後蒸発器５に導かれ、該
蒸発器５中で管８より導入され管Ｂ′から排出される熱
源流体により加熱された後。In the refrigeration cycle system shown in FIG. 1, the working medium is compressed by a compressor 1 and then led to a condenser 2.
Inside, it is cooled and condensed by the load fluid introduced from the pipe 3. Meanwhile, the load fluid is heated inversely in the condenser 2 and the tube 3
' and then subjected to load heating. Next, the condensed working medium is depressurized by a pressure reducing device 4, and then led to an evaporator 5, where it is heated by a heat source fluid introduced from a pipe 8 and discharged from a pipe B'.
再び圧縮機ｌに吸引され上記のサイクルを繰り返す、一
方、熱源流体は蒸発器５中で逆に冷却され、管８′を経
て冷却に供される。The heat source fluid is again drawn into the compressor 1 and repeats the above cycle, while the heat source fluid is cooled in the evaporator 5 and sent through the tube 8' for cooling.
第２図及び第３図は第１図に示す冷凍サイクルシステム
における作動媒体のサイクルを圧力−エンタルピー線図
上に記入したものである０作動媒体の飽和蒸気を断熱圧
縮した場合、湿り状態になるものを第２図に、乾き状態
になるものを第３図に示す。Figures 2 and 3 are pressure-enthalpy diagrams showing the cycle of the working medium in the refrigeration cycle system shown in Figure 1.0 When the saturated vapor of the working medium is adiabatically compressed, it becomes wet. Figure 2 shows the product, and Figure 3 shows the product in a dry state.
第１図の圧縮機による作動媒体の変化は第２図及び第３
図の符号８から９あるいは１３から１４の変化に、凝縮
器による作動媒体の変化は８１１０→１１→あるいは１
４→１５→１８→１７の変化に、減圧装置による作動媒
体の変化は１１から１２あるいは１７から１８の変化に
、蒸発器による作動媒体の変化は１２から８あるいは１
Ｂから１３の変化にそれぞれ対応する。Changes in the working medium caused by the compressor in Figure 1 are shown in Figures 2 and 3.
In the change from 8 to 9 or from 13 to 14 in the figure, the change in working medium due to the condenser is 8110 → 11 → or 1
The change in working medium due to the pressure reducing device is from 11 to 12 or from 17 to 18, and the change in working medium due to the evaporator is from 12 to 8 or 1.
This corresponds to each change from B to 13.
本発明の作動媒体を用いた第１図の冷凍サイクルシステ
ムの運転条件として蒸発器における作動媒体の蒸発路り
温度（符号７あるいは１３の温度、以下、蒸発温度とい
う）と凝縮器における作動媒体の凝縮始めの温度（符号
９あるいは１５の温度、以下、凝縮温度という）を設定
した。第１表から第２表に本発明の作動媒体を用いた上
記の冷凍サイクルシステムにおける成績係数、圧縮機単
位ｋｗ当りの冷凍能力および作動媒体の循環量を、比較
例とともに記す。The operating conditions of the refrigeration cycle system shown in FIG. 1 using the working medium of the present invention are the evaporation path temperature of the working medium in the evaporator (temperature 7 or 13, hereinafter referred to as evaporation temperature) and the temperature of the working medium in the condenser. The temperature at the beginning of condensation (temperature number 9 or 15, hereinafter referred to as condensation temperature) was set. Tables 1 to 2 show the coefficient of performance, refrigeration capacity per unit kW of compressor, and circulating amount of working medium in the above-mentioned refrigeration cycle system using the working fluid of the present invention, along with comparative examples.
表から理解されるようにＲ−１２３とＲ−１３２ｂとの
混合モル比が約１０：９０前後になる本発明の作動媒体
を用いた冷凍サイクルの成績係数および冷凍能力はＲ−
１２３およびＲ−１３２ｂをそれぞれ単独で用いた場合
に比べ改善されており、さらに、Ｒ−１２３の混合割合
を増加させた本発明の作動媒体を用いることにより、成
績係数をあまり低下させずに冷凍能力を大幅に改善でき
ることがわかる。As can be understood from the table, the coefficient of performance and refrigeration capacity of the refrigeration cycle using the working fluid of the present invention in which the mixing molar ratio of R-123 and R-132b is approximately 10:90 are R-
123 and R-132b alone, and by using the working fluid of the present invention with an increased mixing ratio of R-123, refrigeration can be achieved without significantly reducing the coefficient of performance. It turns out that you can significantly improve your abilities.
また、現在、一般に用いられているトリクロロトリフル
オロエタン（Ｒ−１１３）と比へても大きく改善されて
いる。Furthermore, it is greatly improved compared to trichlorotrifluoroethane (R-113), which is currently commonly used.
本発明の作動媒体混合物は中温〜高温分野の空調、冷凍
および冷蔵を目的とした冷凍サイクルに応用する場合に
特に有効であるが、ランキンサイクル用あるいは、その
他各種の熱回収技術用の作動媒体として使用することも
できる。The working medium mixture of the present invention is particularly effective when applied to refrigeration cycles for air conditioning, refrigeration, and refrigeration in medium to high temperature fields, but can also be used as a working medium for Rankine cycles and various other heat recovery technologies. You can also use
本発明の作動媒体混合物は熱安定性が優れており１通常
の使用条件においては安定剤を必要としないが、苛酷な
使用条件のため熱安定性の向上が必要な場合には、ジメ
チルホスファイト、ジイソプロピルホスファイト、ジフ
ェニルホスファイト等のホスファイト系化合物、又はチ
オホスファイト系化合物、あるいはトリフエノキシホス
フィンサルファイド、トリメチルホスフィンサルファイ
ド等のホスフィンサルファイド系化合物、その他の安定
剤を作動媒体１００重量部に対し、１重量部前後の少量
添加すればよい。The working fluid mixture of the present invention has excellent thermal stability and does not require a stabilizer under normal conditions of use. However, when it is necessary to improve thermal stability due to severe conditions of use, dimethyl phosphite , phosphite compounds such as diisopropyl phosphite and diphenyl phosphite, or thiophosphite compounds, or phosphine sulfide compounds such as triphenoxyphosphine sulfide and trimethylphosphine sulfide, or other stabilizers to 100 parts by weight of the working medium. On the other hand, it is sufficient to add a small amount of about 1 part by weight.
［発明の効果］
本発明の作動媒体混合物は、従来使用されているＲ−１
１３に比し、冷凍サイクル効率すなわち冷凍、加熱効率
に優れ、混合前の単独成分に比し、大幅な改善が認めら
れる。[Effects of the Invention] The working medium mixture of the present invention has conventionally used R-1
Compared to No. 13, it has excellent refrigeration cycle efficiency, that is, freezing and heating efficiency, and is significantly improved compared to the single component before mixing.
第１図は本発明の１実施例を説明するための冷凍サイク
ルのフローシート、第２図および第３図はＲ−１２３／
Ｒ−１３２ｂ混合系を冷媒として用いたサイクルを圧力
−エンタルピー線図に記入した図である。
第１図
第２図 第３図FIG. 1 is a flow sheet of a refrigeration cycle for explaining one embodiment of the present invention, and FIGS. 2 and 3 are R-123/
It is a pressure-enthalpy diagram showing a cycle using an R-132b mixed system as a refrigerant. Figure 1 Figure 2 Figure 3
Claims (1)
エタンを必須成分とすることを特徴とする作動媒体混合
物。 ２、ジクロロトリフルオロエタンとジクロロジフルオロ
エタンとの混合モル比が１：９９〜９９：１である特許
請求の範囲第１項記載の作動媒体混合物。[Scope of Claims] 1. A working medium mixture characterized by containing dichlorotrifluoroethane and dichlorodifluoroethane as essential components. 2. The working medium mixture according to claim 1, wherein the mixing molar ratio of dichlorotrifluoroethane and dichlorodifluoroethane is 1:99 to 99:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62140031A JPS63305187A (en) | 1987-06-05 | 1987-06-05 | Working medium mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62140031A JPS63305187A (en) | 1987-06-05 | 1987-06-05 | Working medium mixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63305187A true JPS63305187A (en) | 1988-12-13 |
Family
ID=15259347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62140031A Pending JPS63305187A (en) | 1987-06-05 | 1987-06-05 | Working medium mixture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63305187A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4997589A (en) * | 1989-12-15 | 1991-03-05 | Allied-Signal Inc. | Azeotrope-like compositions of 1,2-difluoroethane and dichlorotrifluoroethane |
-
1987
- 1987-06-05 JP JP62140031A patent/JPS63305187A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4997589A (en) * | 1989-12-15 | 1991-03-05 | Allied-Signal Inc. | Azeotrope-like compositions of 1,2-difluoroethane and dichlorotrifluoroethane |
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| JPH0192286A (en) | Working medium mixture | |
| JPH01153786A (en) | Working medium mixture | |
| JPS63305187A (en) | Working medium mixture | |
| JPH01141982A (en) | Working medium mixture | |
| JPH01139683A (en) | Working medium mixture | |
| JPS63305186A (en) | Working medium mixture | |
| JP2536560B2 (en) | Working medium mixture | |
| JPH01139677A (en) | Working medium mixture | |
| JPH01168785A (en) | Working medium mixture | |
| JPH01139684A (en) | Working medium mixture | |
| JP2536545B2 (en) | Working medium mixture | |
| JPH02240186A (en) | Halogenated hydrocarbon mixture | |
| JPH01139676A (en) | Working medium mixture | |
| JPH01168784A (en) | Working medium mixture | |
| JPH01139679A (en) | Working medium mixture | |
| JPH01139680A (en) | Working medium mixture | |
| JPH01139681A (en) | Working medium mixture |