JP3067927B2 - Fluorocarbon-based mixed refrigerant - Google Patents
Fluorocarbon-based mixed refrigerantInfo
- Publication number
- JP3067927B2 JP3067927B2 JP5195004A JP19500493A JP3067927B2 JP 3067927 B2 JP3067927 B2 JP 3067927B2 JP 5195004 A JP5195004 A JP 5195004A JP 19500493 A JP19500493 A JP 19500493A JP 3067927 B2 JP3067927 B2 JP 3067927B2
- Authority
- JP
- Japan
- Prior art keywords
- fluorocarbon
- mixed refrigerant
- freon
- weight
- refrigerant
- 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.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【技術分野】本発明は、冷凍機等の冷凍サイクルに使用
する作動流体として使用されるフルオロカーボン系冷媒
に関し、より詳しくは、いわゆる塩素（および臭素）を
含まない代替フロンであって、−３０℃以下の庫内温度
が得られるフルオロカーボン系混合冷媒に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorocarbon-based refrigerant used as a working fluid for a refrigerating cycle of a refrigerator or the like, and more particularly to a so-called chlorine-free and chlorofluorocarbon-free substitute, which is -30.degree. The present invention relates to a fluorocarbon-based mixed refrigerant capable of obtaining the following internal temperature.
【０００２】[0002]
【従来技術およびその問題点】冷凍機等の冷凍サイクル
に用いられる作動流体として、従来広く用いられていた
クロロフルオロカーボンがオゾン層破壊の原因であると
言われて以来、各国は国際条約によりクロロフルオロカ
ーボンを含めた特定フロンの使用規制および規制スケジ
ュールを定め、同時に、そのオゾン層破壊の原因である
塩素を含まない、いわゆる代替フロンの開発が進められ
ている。さらに最近の研究は、オゾン層破壊の実情がよ
り厳しい状況にあることを知らせ、各国は規制スケジュ
ールを前倒しして実施することを相次いで発表してい
る。2. Description of the Related Art Since it has been said that chlorofluorocarbon, which has been widely used as a working fluid used in a refrigeration cycle of a refrigerator or the like, causes ozone layer depletion, various countries have agreed on chlorofluorocarbon according to international treaties. In addition, the use regulation and regulation schedule of specific CFCs, including chlorofluorocarbon, have been set, and at the same time, so-called alternative CFCs that do not contain chlorine, which causes ozone layer depletion, are being developed. More recent studies have signaled that the situation for ozone depletion is becoming more severe, and countries are successively announcing that they will implement regulations ahead of schedule.
【０００３】一方、−３０℃以下の庫内温度を実現する
フロンとしては従来、フロン５０２(CHClF2 とC2ClF5の
共沸混合物）とフロン１３Ｂ１(CBrF3) が知られてい
た。しかし両者はいずれも塩素または臭素を含むもの
で、既に使用を規制され、あるいは規制スケジュールに
載っている。−３０℃以下の蒸発温度（沸点）を持つ代
替フロン（ＨＦＣ）は、現在開発されていない。On the other hand, as the chlorofluorocarbon which realizes the internal temperature of -30 ° C. or less, chlorofluorocarbon 502 (an azeotropic mixture of CHClF 2 and C 2 ClF 5 ) and chlorofluorocarbon 13B1 (CBrF 3 ) have been known. However, both contain chlorine or bromine and are already regulated for use or on a regulatory schedule. An alternative chlorofluorocarbon (HFC) having an evaporation temperature (boiling point) of −30 ° C. or less is not currently being developed.
【０００４】[0004]
【発明の目的】本発明は、このような技術的な背景に基
づき、塩素および臭素を含まず、−３０℃以下、好まし
くは−５０℃以下の庫内温度を実現できる冷媒を得るこ
と目的とする。An object of the present invention is to provide a refrigerant based on such a technical background, which does not contain chlorine and bromine and can realize a refrigerator temperature of -30 ° C or lower, preferably -50 ° C or lower. I do.
【０００５】[0005]
【発明の概要】本発明は、塩素および臭素を含むことな
く水素を含む複数のフルオロカーボンを混合することに
より、−３０℃以下の沸点を持つフロン系作動流体を得
るという着想に基づき、試行錯誤の結果、完成されたも
のである。本発明のフルオロカーボン系混合冷媒は、フ
ロン１３４ａ（すなわち、１，１，１，２−テトラフル
オロエタン；CH2FCF3 ）と、フロン１１６（すなわち、
ヘキサフルオロエタン；CF3-CF3)を含むことを特徴とす
る混合冷媒である。SUMMARY OF THE INVENTION The present invention is based on the idea of obtaining a fluorocarbon-based working fluid having a boiling point of -30 ° C. or less by mixing a plurality of fluorocarbons containing hydrogen without containing chlorine and bromine. As a result, it is completed. The fluorocarbon-based mixed refrigerant of the present invention includes Freon 134a (ie, 1,1,1,2-tetrafluoroethane; CH 2 FCF 3 ) and Freon 116 (ie,
It is a mixed refrigerant characterized by containing hexafluoroethane; CF 3 -CF 3 ).
【０００６】本発明のフルオロカーボン系混合冷媒は、
前記のように２種のフルオロカーボン、すなわち２種の
フロンを含むのもである。一方のフロンは、沸点−２
６．３℃のフロン１３４ａであり、他方のフロンは、沸
点−７８．２℃のフロン１１６である。そして、本発明
の混合物は、非共沸混合物である。にも拘らず、実験に
よれば、この非共沸混合物は、−３０℃以下の沸点（庫
内温度）を示す。[0006] The fluorocarbon-based mixed refrigerant of the present invention comprises:
As described above, two fluorocarbons, that is, two fluorocarbons, are included. One fluorocarbon has a boiling point of -2.
Chlorofluorocarbon 134a having a boiling point of -78.2 [deg.] C. And the mixture of this invention is a non-azeotropic mixture. Nevertheless, according to experiments, this non-azeotropic mixture shows a boiling point (in-chamber temperature) of −30 ° C. or less.
【０００７】本発明のフルオロカーボン系混合冷媒は、
より低い沸点を望む場合には、フロン１１６の混合割合
を高め、それ程低い沸点を望まない場合には、フロン１
３４ａの混合割合を高める。一般的には、フロン１１６
の混合割合が高まる程、冷凍機の吐出圧が高くなり、機
械的な問題点が増す。−５０℃以下の庫内温度を得るに
は、フロン１３４ａを７５±１５重量％、フロン１１６
を２５±１５重量％含むことが好ましい。さらに、特に
好ましくは、フロン１３４ａを７２±２重量％、フロン
１１６を２８±２重量％とすると、最も好ましい結果が
得られた。[0007] The fluorocarbon-based mixed refrigerant of the present invention comprises:
If a lower boiling point is desired, the mixing ratio of Freon 116 is increased. If a lower boiling point is not desired, Freon 1
34a is increased. Generally, Freon 116
As the mixing ratio increases, the discharge pressure of the refrigerator increases, and mechanical problems increase. To obtain an internal temperature of −50 ° C. or less, 75 ± 15% by weight of Freon 134a and Freon 116
Is preferably contained at 25 ± 15% by weight. Most preferably, the most preferable result is obtained when the Freon 134a is 72 ± 2% by weight and the Freon 116 is 28 ± 2% by weight.
【０００８】本発明のフルオロカーボン系混合冷媒には
さらに、より低温の庫内温度を実現させながら、なおか
つ吐出圧力を上昇させず、むしろ低下させるために、飽
和炭化水素、不飽和炭化水素、または芳香族炭化水素の
一種以上からなる添加剤を添加することができる。[0008] The fluorocarbon-based mixed refrigerant of the present invention further comprises a saturated hydrocarbon, an unsaturated hydrocarbon, or an aromatic hydrocarbon in order to realize a lower internal temperature and not to increase, but rather to lower, the discharge pressure. Additives consisting of one or more aromatic hydrocarbons can be added.
【０００９】飽和炭化水素（Ｃn Ｈ2n+2、ｎは整数）
は、具体的には、メタン、エタン、プロパン、ブタン、
ペンタン、イソペンタンを使用することができる。中で
もイソペンタンが好ましい。Saturated hydrocarbon (C n H 2n + 2 , n is an integer)
Specifically, methane, ethane, propane, butane,
Pentane and isopentane can be used. Of these, isopentane is preferred.
【００１０】不飽和炭化水素（Ｃn Ｈ2n、ｎは整数）
は、具体的には、エチレン、プロピレン、ブチレン、ペ
ンテン等を使用することができる。中でもペンテンが好
ましい。Unsaturated hydrocarbon (C n H 2n , n is an integer)
Specifically, ethylene, propylene, butylene, pentene and the like can be used. Among them, pentene is preferred.
【００１１】芳香族炭化水素は、具体的には、ベンゼ
ン、トルエン、エチルベンゼン等を使用することができ
る。As the aromatic hydrocarbon, specifically, benzene, toluene, ethylbenzene and the like can be used.
【００１２】これら添加物は、混合冷媒と冷凍機オイル
の一方または双方に添加することができる。これらの添
加物を添加することによって、フロン１３４ａとフロン
１１６の混合性を高め、冷媒の沸点をより低くすること
ができ、さらに吐出温度を低くすることができる。さら
に、冷凍機オイルとの高い溶解性が得られ、スラッジの
発生を抑制して長期に渡り運転を安定させることがで
き、しかもオイル戻りが良くなることが確認された。[0012] These additives can be added to one or both of the mixed refrigerant and the refrigerator oil. By adding these additives, the mixing property between Freon 134a and Freon 116 can be increased, the boiling point of the refrigerant can be further lowered, and the discharge temperature can be further lowered. Further, it was confirmed that high solubility with the refrigerator oil was obtained, sludge generation was suppressed, the operation was stabilized for a long period of time, and oil return was improved.
【００１３】またこれらの添加物の添加量は、冷凍機オ
イルに添加する場合、冷凍機オイルに対して２〜３０重
量％を添加することが好ましい。２重量％未満では、冷
凍機オイルに好ましい変化を与えることができず、冷凍
能力も有意に変化しない。３０重量％を越えると、逆
に、圧縮率が低下し、冷凍能力も低下する傾向となる。When these additives are added to the refrigerator oil, it is preferable to add 2 to 30% by weight based on the refrigerator oil. If it is less than 2% by weight, no favorable change can be given to the refrigerator oil, and the refrigerating capacity does not significantly change. If it exceeds 30% by weight, conversely, the compressibility tends to decrease, and the refrigerating capacity tends to decrease.
【００１４】[0014]
【発明の実施例】以下図示実施例に基づいて本発明を説
明する。表１に、フロン１３４ａ(CH2FCF3) およびフロ
ン１１６(CF3-CF3) の物理特性を示す。本発明は、この
ように性質の全く異なる二種のフルオロカーボンを混合
して新しい混合冷媒を得たものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on illustrated embodiments. Table 1 shows physical properties of Freon 134a (CH 2 FCF 3 ) and Freon 116 (CF 3 -CF 3 ). In the present invention, two kinds of fluorocarbons having completely different properties are mixed to obtain a new mixed refrigerant.
【００１５】「実施例」表２は、本発明の実施例を示
す。この実施例は、フロン１３４ａとフロン１１６を同
表の割合で混合し、かつイソペンタンを添加した場合と
添加しない場合とに分けて、実施例番号１Ａ〜１Ｄの混
合冷媒を作り、これを冷凍機圧縮機（ダンフォス社製、
機番Ｆ−１４Ｌ）に常法に従い封入して運転し、同表に
記載の項目について測定した結果を示している。なお、
各実施例において、冷媒の総重量は２８７ｇであり、冷
凍機オイルは６００ｃｃの量で添加した。"Examples" Table 2 shows examples of the present invention. In this embodiment, chlorofluorocarbon 134a and chlorofluorocarbon 116 are mixed at the ratios shown in the same table, and the mixed refrigerants of Examples Nos. 1A to 1D are prepared separately for the case where isopentane is added and the case where isopentane is not added. Compressor (Danfoss,
(Machine No. F-14L) according to a conventional method, and operation was performed, and the results of measurement of the items described in the table are shown. In addition,
In each example, the total weight of the refrigerant was 287 g and the refrigerator oil was added in an amount of 600 cc.
【００１６】表２の実験結果は、本発明による混合冷媒
によると、−５０℃以下の庫内温度が実現できることを
示している。また、添加剤として、イソペンタンを加え
た場合には、加えない場合に比し、より冷凍機の低圧側
圧力、高圧側圧力が安定することが確認された。The experimental results in Table 2 show that the mixed refrigerant according to the present invention can achieve a refrigerator temperature of −50 ° C. or less. Further, it was confirmed that when isopentane was added as an additive, the low-pressure side pressure and the high-pressure side pressure of the refrigerator were more stable than when no isopentane was added.
【００１７】[0017]
【発明の効果】以上のように、本発明によれば、オゾン
層破壊のおそれがなく、しかも−３０℃以下の庫内温度
が得られるフルオロカーボン系混合冷媒が得られる。As described above, according to the present invention, it is possible to obtain a fluorocarbon-based mixed refrigerant which has no fear of destruction of the ozone layer and can obtain an internal temperature of -30 ° C or lower.
【表１】 [Table 1]
【表２】 [Table 2]
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平７−62334（ＪＰ，Ａ) 特開 平３−170585（ＪＰ，Ａ) 特開 平３−173839（ＪＰ，Ａ) 特表 平６−506015（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C09K 5/04 F25B 1/00 ＣＡ（ＳＴＮ)────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-62334 (JP, A) JP-A-3-170585 (JP, A) JP-A-3-173839 (JP, A) 506015 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C09K 5/04 F25B 1/00 CA (STN)
Claims (5)
(CH2FCF3) 及びヘキサフルオロエタン(CF3-CF3) を含む
ことを特徴とするフルオロカーボン系混合冷媒。1. A 1,1,1,2-tetrafluoroethane
A fluorocarbon-based mixed refrigerant comprising (CH 2 FCF 3 ) and hexafluoroethane (CF 3 -CF 3 ).
トラフルオロエタン７５±１５重量％とヘキサフルオロ
エタン２５±１５重量％を含むフルオロカーボン系混合
冷媒。2. The fluorocarbon-based mixed refrigerant according to claim 1, comprising 75 ± 15% by weight of 1,1,1,2-tetrafluoroethane and 25 ± 15% by weight of hexafluoroethane.
素、不飽和炭化水素、または芳香族炭化水素の一種以上
からなる添加剤が添加されているフルオロカーボン系混
合冷媒。3. The fluorocarbon mixed refrigerant according to claim 1, further comprising an additive comprising at least one of a saturated hydrocarbon, an unsaturated hydrocarbon, and an aromatic hydrocarbon.
冷媒は冷凍機に封入され、添加剤は、冷凍機オイルに添
加されているフルオロカーボン系混合冷媒。4. A refrigerant mixture according to claim 3, wherein the fluorocarbon-based refrigerant is sealed in a refrigerator and the additive is added to the refrigerator oil.
イルに対して２〜３０重量％添加されているフルオロカ
ーボン系混合冷媒。5. The mixed refrigerant according to claim 4, wherein the additive is added in an amount of 2 to 30% by weight with respect to the refrigerator oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5195004A JP3067927B2 (en) | 1993-08-05 | 1993-08-05 | Fluorocarbon-based mixed refrigerant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5195004A JP3067927B2 (en) | 1993-08-05 | 1993-08-05 | Fluorocarbon-based mixed refrigerant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0748562A JPH0748562A (en) | 1995-02-21 |
| JP3067927B2 true JP3067927B2 (en) | 2000-07-24 |
Family
ID=16333938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5195004A Expired - Fee Related JP3067927B2 (en) | 1993-08-05 | 1993-08-05 | Fluorocarbon-based mixed refrigerant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3067927B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2755753B1 (en) * | 1996-11-13 | 1998-12-31 | Armines | ZEOTROPE REFRIGERANT MIXTURE WITHOUT CHLORINATED DERIVATIVES |
| US6495061B1 (en) | 1998-06-06 | 2002-12-17 | Nihon Freezer Co., Ltd. | Refrigerant for providing ultra-low temperature |
| JP2001099498A (en) * | 1999-09-30 | 2001-04-13 | Dairei:Kk | Refrigeration system using nonazeotrope refrigerant |
| JP3789898B2 (en) * | 2003-03-17 | 2006-06-28 | 東芝キヤリア株式会社 | Refrigerant, refrigerant compressor and refrigeration apparatus |
-
1993
- 1993-08-05 JP JP5195004A patent/JP3067927B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0748562A (en) | 1995-02-21 |
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