JPH06220430A - Refrigerant composition - Google Patents
Refrigerant compositionInfo
- Publication number
- JPH06220430A JPH06220430A JP50A JP836493A JPH06220430A JP H06220430 A JPH06220430 A JP H06220430A JP 50 A JP50 A JP 50A JP 836493 A JP836493 A JP 836493A JP H06220430 A JPH06220430 A JP H06220430A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- pentane
- weight
- mixed
- compressor
- 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
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- Lubricants (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は冷凍装置に用いられ、
かつ、オゾン層を破壊する危険のない冷媒組成物に関す
る。BACKGROUND OF THE INVENTION This invention is used in a refrigeration system,
In addition, the present invention relates to a refrigerant composition that does not have a risk of destroying the ozone layer.
【０００２】[0002]
【従来の技術】従来、冷凍機の冷媒として用いられてい
るものはジクロロジフルオロメタン（以下Ｒ−１２とい
う）や共沸混合冷媒のＲ−１２と１，１−ジフルオロエ
ンタ（以下Ｒ−１５２ａという）とからなるＲ−５００
が多い。Ｒ−１２の沸点は大気圧で−２９．６５℃で、
Ｒ５００の沸点は−３３．４５℃であり、通常の冷凍装
置に好適である。さらに、圧縮機への吸込温度が比較的
高くても吐出温度が圧縮機のオイルスラッジを引き起こ
す程高くならない性質を有している。さらに又、Ｒ−１
２は圧縮機の鉱物油の冷凍機油との相溶性が良く、冷媒
回路中のオイルを圧縮機まで引き戻す役割も果たす。2. Description of the Related Art Conventionally, refrigerants used in refrigerators are dichlorodifluoromethane (hereinafter referred to as R-12) and azeotropic mixed refrigerants R-12 and 1,1-difluoroenta (hereinafter referred to as R-152a). ) And R-500
There are many. The boiling point of R-12 is -29.65 ° C at atmospheric pressure,
R500 has a boiling point of −33.45 ° C., which is suitable for a normal refrigerating apparatus. In addition, even if the suction temperature to the compressor is relatively high, the discharge temperature does not become so high as to cause oil sludge in the compressor. Furthermore, R-1
No. 2 has good compatibility with the refrigerating machine oil of the mineral oil of the compressor, and also plays a role of returning the oil in the refrigerant circuit to the compressor.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
各冷媒は、その高いオゾン破壊の潜在性により、大気中
に放出されて地球上空のオゾン層に到達すると、このオ
ゾン層を破壊する。このオゾン層の破壊は冷媒中の塩素
基（Ｃｌ）により引き起こされる。そこで、この塩素基
を含まない冷媒、例えばジフルオロメタン（以下Ｒ−３
２という）、ペンタフルオロエタン（以下Ｒ−１２５と
いう）や１，１，１，２−テトラフルオロエタン（以下
Ｒ−１３４ａという）がこれらの代替冷媒として考えら
れている。このＲ−３２の沸点は、大気圧で−５１．７
℃で、Ｒ−１２５の沸点は、−４８．５℃、Ｒ−１３４
ａの沸点は、−２６．０℃である。However, due to the high ozone depletion potential, each of the above refrigerants destroys the ozone layer when it reaches the ozone layer above the earth by being released into the atmosphere. The destruction of the ozone layer is caused by chlorine groups (Cl) in the refrigerant. Therefore, a refrigerant containing no chlorine group, such as difluoromethane (hereinafter referred to as R-3
2), pentafluoroethane (hereinafter referred to as R-125), and 1,1,1,2-tetrafluoroethane (hereinafter referred to as R-134a) are considered as alternative refrigerants for these. The boiling point of R-32 is -51.7 at atmospheric pressure.
C, the boiling point of R-125 is -48.5 ° C, R-134
The boiling point of a is −26.0 ° C.
【０００４】この塩素基を含まない冷媒のＲ−３２，Ｒ
−１２５及びＲ−１３４ａは一般的な鉱物油やアルキル
ベンゼン等の冷凍機油との相溶性が悪く、圧縮機への油
の戻りの悪化や寝込み起動時にオイルから分離した冷媒
の吸い上げなどから圧縮機の潤滑不良に至る問題があっ
た。This chlorine-free refrigerant R-32, R
-125 and R-134a have poor compatibility with general mineral oils and refrigerating machine oils such as alkylbenzenes, so that the return of oil to the compressor is aggravated and the refrigerant separated from the oil is sucked up at the time of start-up of the compressor. There was a problem leading to poor lubrication.
【０００５】このため、本発明者は鉱物油やアルキルベ
ンゼン等との相溶性の悪い冷媒にこの鉱物油やアルキル
ベンゼン等と相溶性の良いｎ−ペンタンを混合して圧縮
機から冷媒回路に吐出された鉱物油やアルキルベンゼン
等の冷凍機油をこの圧縮機に回収できることを見出し
た。Therefore, the present inventor mixed n-pentane, which has a high compatibility with mineral oil, alkylbenzene, etc., with a refrigerant with a low compatibility with mineral oil, alkylbenzene, etc., and discharged it from the compressor to the refrigerant circuit. It has been found that refrigerating machine oil such as mineral oil and alkylbenzene can be recovered in this compressor.
【０００６】この発明は上記の問題を解決するもので、
塩素基を含まない冷媒に大気圧で＋３６．０７℃のｎ−
ペンタンを混合することで鉱物油やアルキルベンゼン等
の冷凍機油を、塩素基を含まない冷媒に使用できるよう
にすることを目的とした冷媒組成物を提供することであ
る。The present invention solves the above problems.
N-at + 36.07 ° C at atmospheric pressure in a chlorine-free refrigerant
A refrigerant composition intended to make it possible to use a refrigerating machine oil such as a mineral oil or an alkylbenzene by mixing pentane with a chlorine-free refrigerant.
【０００７】[0007]
【課題を解決するための手段】この発明はジフルオロメ
タン、ペンタフルオロエタン、１，１，１，２−テトラ
フルオロエタン及びｎ−ペンタンから冷媒組成物を構成
したものである。The present invention comprises a refrigerant composition comprising difluoromethane, pentafluoroethane, 1,1,1,2-tetrafluoroethane and n-pentane.
【０００８】また、この発明はｎ−ペンタンを予め１，
１，１，２−テトラフルオロエタンに混合させてからジ
フルオロメタンとペンタフルオロエタンとの冷媒中に混
合させ前記ｎ−ペンタンを総重量の０．１重量％以上〜
１４重量％以下の範囲の割合に混合したものである。In addition, the present invention uses 1, -n-pentane in advance.
After being mixed with 1,1,2-tetrafluoroethane and then mixed with a refrigerant of difluoromethane and pentafluoroethane, the n-pentane is contained in an amount of 0.1% by weight or more based on the total weight.
It is mixed in a ratio within the range of 14% by weight or less.
【０００９】さらに、この発明は１，１，１，２−テト
ラフルオロエタンに混合するｎ−ペンタンの割合を１４
重量％以上にしてジフルオロメタンやペンタフルオロエ
タンの冷媒に混合する際に１４重量％以下になるように
したものである。Further, according to the present invention, the ratio of n-pentane mixed with 1,1,1,2-tetrafluoroethane is 14%.
It is made to be 14% by weight or less when mixed with a refrigerant such as difluoromethane or pentafluoroethane in an amount of not less than 14% by weight.
【００１０】[0010]
【作用】この発明は上記のように構成したことにより、
鉱物油やアルキルベンゼン等の冷凍機油との相溶性の悪
い塩素基を含まない冷媒に鉱物油やアルキルベンゼン等
の冷凍機油と相溶性の良いｎ−ペンタンを混合して圧縮
機から冷媒回路に吐出される鉱物油やアルキルベンゼン
等の冷凍機油を圧縮機に回収できるようにしている。The present invention is constructed as described above,
Refrigerant that does not have good compatibility with refrigerating machine oil such as mineral oil and alkylbenzene, and n-pentane that has good compatibility with refrigerating machine oil such as mineral oil and alkylbenzene are mixed and discharged from the compressor to the refrigerant circuit. Refrigerating machine oil such as mineral oil and alkylbenzene can be collected in a compressor.
【００１１】また、この発明は可燃性で、かつ、Ｒ−３
２やＲ−１２５の冷媒に常温でほとんど溶け合わないｎ
−ペンタンをＲ−１３４ａの冷媒中に一定の割合で混合
してからＲ−３２及びＲ−１２５の冷媒と混合してこの
Ｒ−３２及びＲ−１２５との冷媒とｎ−ペンタンとの混
合割合が変わってもこのｎ−ペンタンの混合比率が１４
重量％以上にならないようにするとともに、前記Ｒ−３
２及びＲ−１２５と常温で分離しないようにしている。The present invention is also flammable, and R-3
Almost insoluble in 2 and R-125 refrigerant at room temperature
-Pentane is mixed with the refrigerant of R-134a at a constant ratio, and then mixed with the refrigerants of R-32 and R-125 to mix the refrigerant of R-32 and R-125 with n-pentane. Even if the ratio changes, the mixing ratio of this n-pentane is 14
In addition to the weight percentage, the R-3
2 and R-125 are not separated at room temperature.
【００１２】[0012]
【実施例】以下この発明を図に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
【００１３】図１はこの発明の一実施例を示す冷媒封入
装置の正面図である。図２は一般的な冷媒回路図であ
る。FIG. 1 is a front view of a refrigerant sealing device showing an embodiment of the present invention. FIG. 2 is a general refrigerant circuit diagram.
【００１４】１は圧縮機２を搭載した冷蔵庫である。３
は圧縮機２に冷媒を封入する冷媒封入機である。４は冷
媒封入機３に冷媒を供給する冷媒容器である。圧縮機２
には凝縮器５，キャピラリチューブ６及び蒸発器７が順
次接続され、冷媒回路を構成している。Reference numeral 1 is a refrigerator equipped with a compressor 2. Three
Is a refrigerant enclosure for enclosing the refrigerant in the compressor 2. Reference numeral 4 is a refrigerant container for supplying a refrigerant to the refrigerant enclosure 3. Compressor 2
A condenser 5, a capillary tube 6 and an evaporator 7 are sequentially connected to the condenser to form a refrigerant circuit.
【００１５】この冷媒回路中にはＲ−３２，Ｒ−１２
５，Ｒ−１３４ａ及びｎ−ペンタンの冷媒混合物が充填
されている。その組成はＲ−３２が２０重量％〜３０重
量％で、好ましくは２５重量％、Ｒ−１２５が１０重量
％〜２０重量％で、好ましくは１５重量％、Ｒ−１３４
ａが４０重量％〜６０重量％で、好ましくは５０重量
％、ｎ−ペンタンが０．１重量％〜１４重量％で、好ま
しくは１０重量％である。R-32 and R-12 are contained in this refrigerant circuit.
5, filled with a refrigerant mixture of R-134a and n-pentane. The composition is such that R-32 is 20% to 30% by weight, preferably 25% by weight, R-125 is 10% to 20% by weight, preferably 15% by weight, R-134.
a is 40% by weight to 60% by weight, preferably 50% by weight, and n-pentane is 0.1% by weight to 14% by weight, preferably 10% by weight.
【００１６】Ｒ−３２は混合比率が２０重量％以下にな
ると、成績係数（ＣＯＰ）が低下し、３０重量％以上に
なると、大気中に漏れた場合に発火する危険を伴ってい
る。Ｒ−１２５は混合比率が１０重量％以下になると、
圧縮機２から吐出される冷媒の吐出温度が高くなりす
ぎ、２０重量％以上になると、成績係数が低下するとと
もに、地球温暖化係数（ＧＷＰ）値が高くなりすぎる。
Ｒ−１３４ａは混合比率が４０重量％以下になると、冷
媒回路内の圧力が高くなりすぎ、６０重量％以上になる
と、蒸発温度が高くなる。When the mixing ratio of R-32 is 20% by weight or less, the coefficient of performance (COP) is lowered, and when it is 30% by weight or more, there is a risk of ignition when leaking to the atmosphere. When the mixing ratio of R-125 is 10% by weight or less,
When the discharge temperature of the refrigerant discharged from the compressor 2 becomes too high and is 20% by weight or more, the coefficient of performance is lowered and the global warming potential (GWP) value is too high.
When the mixing ratio of R-134a is 40% by weight or less, the pressure in the refrigerant circuit becomes too high, and when it is 60% by weight or more, the evaporation temperature becomes high.
【００１７】ｎ−ペンタンはＲ−１３４ａの冷媒に予め
一定の割合で混合し、Ｒ−３２及びＲ−１２５の冷媒に
混合する。このとき、ｎ−ペンタンはＲ−１３４ａの冷
媒に１４重量％以上混合させて、Ｒ３２及びＲ−１２５
の冷媒に混合したときに１４重量％以下になるようにす
る。すなわち、ｎ−ペンタンは鉱物油やアルキルベンゼ
ンと相溶性があるが、沸点が高く、可燃性であるため、
混合比率が１４重量％以上になると、蒸発器７において
所要の冷却温度が得られなくなり、かつ、大気中に漏れ
た場合には発火する危険を伴っている。このことから、
ｎ−ペンタンはＲ−１３４ａの冷媒と一定の比率で混合
してからＲ３２及びＲ−１２５の冷媒と混合し、全体の
混合比率が１４重量％以上にならないようにされてい
る。N-Pentane is mixed in advance with the refrigerant of R-134a at a constant ratio and then mixed with the refrigerants of R-32 and R-125. At this time, n-pentane was mixed with the refrigerant of R-134a in an amount of 14% by weight or more to obtain R32 and R-125.
14 wt% or less when mixed with the above refrigerant. That is, n-pentane is compatible with mineral oil and alkylbenzene, but has a high boiling point and is flammable.
If the mixing ratio is 14% by weight or more, the required cooling temperature cannot be obtained in the evaporator 7, and there is a risk of ignition if leaked to the atmosphere. From this,
The n-pentane is mixed with the R-134a refrigerant at a constant ratio and then mixed with the R32 and R-125 refrigerants so that the total mixing ratio does not exceed 14% by weight.
【００１８】また、ｎ−ペンタンはＲ−３２及びＲ−１
２５等の塩素基を含まない冷媒と混合しないが、Ｒ−１
３４ａの冷媒に常温で混合するため、このＲ−１３４ａ
の冷媒を介在させて混合冷媒を作れるようにしている。Further, n-pentane is R-32 or R-1.
Do not mix with refrigerants containing no chlorine groups such as 25, but R-1
Because it mixes with the refrigerant of 34a at room temperature, this R-134a
A mixed refrigerant can be made by interposing the above refrigerant.
【００１９】ｎ−ペンタンは混合比率を１０重量％にす
ることにより、冷却温度の適正化、鉱物油やアルキルベ
ンゼン等の冷凍機油の圧縮機への戻りを良好にするとと
もに、発火の危険性を回避できるようにされている。By adjusting the mixing ratio of n-pentane to 10% by weight, the cooling temperature is optimized and the refrigerating machine oil such as mineral oil and alkylbenzene is returned to the compressor well, and the risk of ignition is avoided. It is made possible.
【００２０】[0020]
【発明の効果】以上のようにこの発明によれば、ジフル
オロメタン、ペンタフルオロエタン、１，１，１，２−
テトラフルオロエタン及びｎ−ペンタンから冷媒組成物
を構成したので、オゾン層を破壊する危険性の少ない冷
媒を潤滑性能が良く、耐熱性に優れた鉱物油やアルキル
ベンゼン等の冷凍機油に使用できる。As described above, according to the present invention, difluoromethane, pentafluoroethane, 1,1,1,2-
Since the refrigerant composition is composed of tetrafluoroethane and n-pentane, it is possible to use a refrigerant having a low risk of depleting the ozone layer as a refrigerating machine oil such as mineral oil or alkylbenzene having excellent lubricating performance and heat resistance.
【００２１】また、この発明はｎ−ペンタンを予め１，
１，１，２−テトラフルオロエタンに混合させてからジ
フルオロメタンとペンタフルオロエタンとの冷媒中に混
合させ前記ｎ−ペンタンを総重量の０．１重量％以上〜
１４重量％以下の範囲の割合に混合したので、ジフルオ
ロメタンやペンタフルオロエタン等の冷媒と溶け合わな
いｎ−ペンタンを前記ジフルオロメタンやペンタフルオ
ロエタン等の冷媒と混合させられ、しかも、冷却性能を
低下させることなく、可燃性のｎ−ペンタンの発火の危
険性を低下できるようにしたものである。Further, in the present invention, n-pentane is previously added to 1,
After being mixed with 1,1,2-tetrafluoroethane and then mixed with a refrigerant of difluoromethane and pentafluoroethane, the n-pentane is contained in an amount of 0.1% by weight or more based on the total weight.
Since it was mixed in a ratio of 14% by weight or less, n-pentane that does not dissolve in the refrigerant such as difluoromethane or pentafluoroethane can be mixed with the refrigerant such as difluoromethane or pentafluoroethane, and the cooling performance can be improved. It is possible to reduce the risk of ignition of flammable n-pentane without lowering it.
【図１】この発明の一実施例を示す冷媒封入装置の正面
図である。FIG. 1 is a front view of a refrigerant sealing device showing an embodiment of the present invention.
【図２】一般的な冷媒回路図である。FIG. 2 is a general refrigerant circuit diagram.
２ 圧縮機 ３ 冷媒封入機 ４ 冷媒容器 2 Compressor 3 Refrigerant enclosure 4 Refrigerant container
Claims (3)
ン、１，１，１，２−テトラフルオロエタン及びｎ−ペ
ンタンからなることを特徴とする冷媒組成物。1. A refrigerant composition comprising difluoromethane, pentafluoroethane, 1,1,1,2-tetrafluoroethane and n-pentane.
トラフルオロエタンに混合させてからジフルオロメタン
とペンタフルオロエタンとの冷媒中に混合させ前記ｎ−
ペンタンを総重量の０．１重量％以上〜１４重量％以下
の範囲の割合に混合してなることを特徴とする冷媒組成
物。2. n-Pentane is mixed in advance with 1,1,1,2-tetrafluoroethane, and then mixed in a refrigerant of difluoromethane and pentafluoroethane.
A refrigerant composition, wherein pentane is mixed in a ratio of 0.1% by weight to 14% by weight of the total weight.
に混合するｎ−ペンタンの割合を１４重量％以上にした
ことを特徴とする請求項２に記載された冷媒組成物。3. The refrigerant composition according to claim 2, wherein the proportion of n-pentane mixed with 1,1,1,2-tetrafluoroethane is 14% by weight or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50A JPH06220430A (en) | 1993-01-21 | 1993-01-21 | Refrigerant composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50A JPH06220430A (en) | 1993-01-21 | 1993-01-21 | Refrigerant composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06220430A true JPH06220430A (en) | 1994-08-09 |
Family
ID=11691186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50A Pending JPH06220430A (en) | 1993-01-21 | 1993-01-21 | Refrigerant composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06220430A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0659862A1 (en) * | 1993-12-20 | 1995-06-28 | Sanyo Electric Co. Ltd | Refrigerant composition and refrigerating apparatus |
| WO1996003473A1 (en) * | 1994-07-27 | 1996-02-08 | Imperial Chemical Industries Plc | Refrigerant compositions |
| WO2001023493A1 (en) * | 1999-09-30 | 2001-04-05 | Refrigerant Products Ltd. | R 22 replacement refrigerant |
| WO2001023491A1 (en) * | 1999-09-30 | 2001-04-05 | Refrigerant Products Ltd | Cfc 12 replacement refrigerant |
| KR100340275B1 (en) * | 1999-11-02 | 2002-06-12 | 박호군 | Refrigerant Mixtures Containing Difluoromethane (HFC-32), Pentafluoroethane (HFC-125) and 1,1,1,2-tetrafluoroethane (HFC-134a) |
| JP2002540246A (en) * | 1999-03-22 | 2002-11-26 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | Composition of difluoromethane, pentafluoroethane, 1,1,1,2-tetrafluoroethane and hydrocarbon |
| US6516837B2 (en) | 2000-09-27 | 2003-02-11 | Honeywell International Inc. | Method of introducing refrigerants into refrigeration systems |
| US6991743B2 (en) | 2002-03-19 | 2006-01-31 | Rpl Holdings Limited | Refrigerant for centrifugal compressors |
| US8999191B2 (en) | 2013-03-15 | 2015-04-07 | National Refrigerants, Inc. | R22 replacement refrigerant |
-
1993
- 1993-01-21 JP JP50A patent/JPH06220430A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6363741B2 (en) | 1993-12-20 | 2002-04-02 | Sanyo Electric Co., Ltd. | Refrigerant composition and refrigerating apparatus |
| EP0659862A1 (en) * | 1993-12-20 | 1995-06-28 | Sanyo Electric Co. Ltd | Refrigerant composition and refrigerating apparatus |
| WO1996003473A1 (en) * | 1994-07-27 | 1996-02-08 | Imperial Chemical Industries Plc | Refrigerant compositions |
| US6783691B1 (en) | 1999-03-22 | 2004-08-31 | E.I. Du Pont De Nemours And Company | Compositions of difluoromethane, pentafluoroethane, 1,1,1,2-tetrafluoroethane and hydrocarbons |
| JP2002540246A (en) * | 1999-03-22 | 2002-11-26 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | Composition of difluoromethane, pentafluoroethane, 1,1,1,2-tetrafluoroethane and hydrocarbon |
| JP2012082430A (en) * | 1999-03-22 | 2012-04-26 | E I Du Pont De Nemours & Co | Compositions of difluoromethane, pentafluoroethane, 1,1,1,2-tetrafluoroethane and hydrocarbon compositions |
| WO2001023491A1 (en) * | 1999-09-30 | 2001-04-05 | Refrigerant Products Ltd | Cfc 12 replacement refrigerant |
| WO2001023493A1 (en) * | 1999-09-30 | 2001-04-05 | Refrigerant Products Ltd. | R 22 replacement refrigerant |
| KR100340275B1 (en) * | 1999-11-02 | 2002-06-12 | 박호군 | Refrigerant Mixtures Containing Difluoromethane (HFC-32), Pentafluoroethane (HFC-125) and 1,1,1,2-tetrafluoroethane (HFC-134a) |
| US6516837B2 (en) | 2000-09-27 | 2003-02-11 | Honeywell International Inc. | Method of introducing refrigerants into refrigeration systems |
| US6640841B2 (en) | 2000-09-27 | 2003-11-04 | Honeywell International Inc. | Method of introducing refrigerants into refrigeration systems |
| US6991743B2 (en) | 2002-03-19 | 2006-01-31 | Rpl Holdings Limited | Refrigerant for centrifugal compressors |
| US8999191B2 (en) | 2013-03-15 | 2015-04-07 | National Refrigerants, Inc. | R22 replacement refrigerant |
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