JP2584337B2 - Refrigerant composition - Google Patents
Refrigerant compositionInfo
- Publication number
- JP2584337B2 JP2584337B2 JP2121973A JP12197390A JP2584337B2 JP 2584337 B2 JP2584337 B2 JP 2584337B2 JP 2121973 A JP2121973 A JP 2121973A JP 12197390 A JP12197390 A JP 12197390A JP 2584337 B2 JP2584337 B2 JP 2584337B2
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- weight
- pentane
- oil
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 （イ）産業上の利用分野 本発明は冷凍装置に用いられ、且つ、オゾン層を破壊
する危険性のない冷媒組成物に関する。The present invention relates to a refrigerant composition used in a refrigeration system and having no risk of destroying the ozone layer.
（ロ）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にはR1
2（ジクロロジフルオロメタン）とR500（R12とR152a
（1,1−ジフルオロエタン）との共沸混合物）が多い。R
12の化学式はCCl2F2である。又、その沸点は大気圧で−
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。更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。更に又、R12は圧縮機
のオイルと相溶性が良く、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。(B) Conventional technology Conventional refrigerants used in refrigerators include R1
2 (dichlorodifluoromethane) and R500 (R12 and R152a
(Azeotropic mixture with (1,1-difluoroethane)). R
The chemical formula of 12 is CCl 2 F 2 . Also, its boiling point is atmospheric pressure-
At 29.65 ° C, the boiling point of R500 is -33.45 ° C, which is suitable for ordinary refrigeration equipment. Further, even if the suction temperature into the compressor is relatively high, the discharge temperature does not become high enough to cause oil sludge of the compressor. Further, R12 has good compatibility with the oil of the compressor, and plays a role of returning the oil in the refrigerant circuit to the compressor.
然し乍ら上記各冷媒は、その高いオゾン破壊潜在性に
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、当該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（C1）により引き起こされることは判っ
ている。However, due to their high ozone depletion potential, each of the above refrigerants destroys the ozone layer when released into the atmosphere and reaches the ozone layer above the earth. It has been known that this destruction of the ozone layer is caused by chlorine groups (C1) in the refrigerant.
そこで、この塩素基を含まない冷媒、例えばR125（ペ
ンタフルオロエタン、CHF2CF3）やR134a（1,1,1,2−テ
トラフルオロエタン、CH2FCF3）がこれらの代替冷媒と
して考えられている。このR125の沸点は大気圧で−48℃
で、R134aの沸点は−26℃である。Therefore, refrigerants containing no chlorine group, for example, R125 (pentafluoroethane, CHF 2 CF 3 ) and R134a (1,1,1,2-tetrafluoroethane, CH 2 FCF 3 ) are considered as alternative refrigerants for these. ing. The boiling point of this R125 is -48 ° C at atmospheric pressure
And the boiling point of R134a is -26 ° C.
又、R22（クロロジフルオロメタン、CClF2H）は塩素
基（Cl）を含むものであるが、水素基（Ｈ）を有してい
るため、オゾン層に到達する以前に活性分解されるの
で、オゾン層を破壊するおそれがない。このR22の沸点
は大気圧で−40.75℃である。R22 (chlorodifluoromethane, CClF 2 H) contains a chlorine group (Cl), but has a hydrogen group (H), so it is actively decomposed before it reaches the ozone layer. There is no risk of destroying. The boiling point of this R22 is -40.75 ° C. at atmospheric pressure.
これらは、先行する米国特許第4810403号明細書にお
いても述べられており、これらの冷媒を使用したオゾン
層を破壊しないブレンドの例がいくつか示されている。These are also described in the earlier US Pat. No. 4,810,403, which shows some examples of blends that do not destroy the ozone layer using these refrigerants.
（ハ）発明が解決しようとする課題 前記米国特許明細書には、オゾン層を破壊しない複数
の冷媒のブレンドによって前述のR12（ジクロロジフル
オロメタン）と同等の冷却能力を発揮する例がいくつか
示されており、塩素基（Cl）を含まないものとしては前
述のR125他がまた、塩素基（Cl）と水素基（Ｈ）を含む
冷媒としてはR22やR142b他によるブレンドは示されてい
る。(C) Problems to be Solved by the Invention The above-mentioned U.S. Patent Specification shows several examples in which a plurality of refrigerants that do not destroy the ozone layer exhibit a cooling capacity equivalent to that of R12 (dichlorodifluoromethane) described above. As a refrigerant containing no chlorine group (Cl), R125 and the like described above are shown, and as a refrigerant containing a chlorine group (Cl) and a hydrogen group (H), blends with R22 and R142b are shown.
然し乍ら、係る先行技術に示されるような冷媒ブレン
ドでは以下に示す不都合が生ずる。即ち、上記塩素基
（Cl）を含まない冷媒、R125及びR134aは冷凍サイクル
の圧縮機のオイルとの相溶性が極度に悪い。これは、オ
イルとの相溶性が塩素基（Cl）の存在に依っているから
である。又、R22も塩素基（Cl）を有するもののオイル
との相溶性は良好ではない。However, refrigerant blends such as those described in the prior art have the following disadvantages. That is, the refrigerants containing no chlorine group (Cl), R125 and R134a, have extremely poor compatibility with the oil of the compressor of the refrigeration cycle. This is because the compatibility with the oil depends on the presence of a chlorine group (Cl). Although R22 also has a chlorine group (Cl), its compatibility with oil is not good.
圧縮機のオイルが冷媒に溶けない場合、冷媒回路の蒸
発器中で二相分離（オイルと冷媒の分離）が発生し、圧
縮機にオイルが戻されずに圧縮機の軸受け摺動部が焼付
いてしまう危険性がある。If the oil in the compressor does not dissolve in the refrigerant, two-phase separation (separation of oil and refrigerant) occurs in the evaporator of the refrigerant circuit, and oil is not returned to the compressor and the sliding parts of the bearing of the compressor are seized. There is a risk that it will.
本発明は係る先行技術が有する種々の課題を解決する
ことを目的とする。An object of the present invention is to solve various problems of the related art.
（ニ）課題を解決するための手段 請求項１の発明は、塩素基を含まない冷媒とｎ−ペン
タンとからなり、このｎ−ペンタンを0.1重量％以上〜1
4重量％以下の範囲の割合で塩素基を含まない冷媒に混
合したものである。(D) Means for Solving the Problems The invention of claim 1 comprises a refrigerant containing no chlorine group and n-pentane, and the n-pentane is contained in an amount of 0.1% by weight or more to 1% by weight.
It is mixed with a refrigerant containing no chlorine group at a ratio of 4% by weight or less.
また、請求項２の発明は、ペンタフルオロエタン、1,
1,1,2−テトラフルオロエタンからなる群の中から選ば
れる塩素基を含まない冷媒にｎ−ペンタンを0.1重量％
以上〜14重量％以下の範囲の割合で混合したものであ
る。The invention according to claim 2 is characterized in that pentafluoroethane, 1,1,
0.1% by weight of n-pentane in a chlorine-free refrigerant selected from the group consisting of 1,1,2-tetrafluoroethane
It is mixed at a ratio in the range of not less than to 14% by weight.
（ホ）作用 ｎ−ペンタン（C5H12）の沸点は大気圧で＋36.07℃で
あり、オゾン層を破壊する危険性はない。又、冷凍サイ
クルの圧縮機のオイルとの相溶性が非常に良好であるの
で、相溶性の悪いR125、R134aやR22に混合することで、
冷媒回路中のオイルをそれに溶け込ませた状態で圧縮機
に帰還せしめる働きをする。(E) Action The boiling point of n-pentane (C 5 H 12 ) is + 36.07 ° C. at atmospheric pressure, and there is no danger of destroying the ozone layer. Also, since the compatibility with the oil of the compressor of the refrigeration cycle is very good, by mixing with poorly compatible R125, R134a and R22,
It works to return the oil in the refrigerant circuit to the compressor in a state of being dissolved therein.
このｎ−ペンタンのオイル戻し機能は、混入の重量比
率が高いほど大きくなるが、ｎ−ペンタンは沸点が高
く、且つ可燃性のため、入れ過ぎれば今度は所要の冷凍
温度が得られず、漏れた場合には爆発の危険性もある。The oil return function of n-pentane increases as the weight ratio of the mixture increases, but n-pentane has a high boiling point and is flammable. In the event of an explosion.
実験によればｎ−ペンタンを0.1重量％以上14重量％
以下混合することで、オイル戻しの機能を損うことな
く、所要の冷凍温度を得て、爆発の危険性を避けること
ができる。According to experiments, 0.1% by weight or more and 14% by weight of n-pentane
By mixing below, the required refrigerating temperature can be obtained without impairing the function of returning the oil, and the danger of explosion can be avoided.
（ヘ）実施例 次に図面において実施例を説明する。図面は通常の冷
凍サイクルの冷媒回路図である。１は電動機によって駆
動される圧縮機、２は凝縮器、３はキャピラリチュー
ブ、４は蒸発器であり、これらは順次接続されている。
この冷媒回路内には化学式に塩素基（Cl）を含まない冷
媒、例えばR125とｎ−ペンタンの冷媒混合物が充填され
る。その組成はR125が90重量％、ｎ−ペンタンが10重量
％である。(F) Example Next, an example will be described with reference to the drawings. The drawing is a refrigerant circuit diagram of a normal refrigeration cycle. 1 is a compressor driven by an electric motor, 2 is a condenser, 3 is a capillary tube, and 4 is an evaporator, which are connected in sequence.
The refrigerant circuit is filled with a refrigerant not containing a chlorine group (Cl) in the chemical formula, for example, a refrigerant mixture of R125 and n-pentane. Its composition is 90% by weight R125 and 10% by weight n-pentane.
充填する冷媒の他の実施例としてはR134aとｎ−ペン
タンの冷媒混合物が考えられる。その組成は同様にR134
aが90重量％、ｎ−ペンタンが10重量％である。Another example of the refrigerant to be charged is a refrigerant mixture of R134a and n-pentane. Its composition is similarly R134
a is 90% by weight and n-pentane is 10% by weight.
図面における冷媒回路中の冷媒の動作を説明する。圧
縮機１から吐出された高温高圧ガス状冷媒混合物は凝縮
器２に流入して放熱し、キャピラリチューブ３で減圧さ
れて蒸発器４に流入し、そこで蒸発して冷却能力を発揮
し、圧縮機１に帰還する。ｎ−ペンタンはR125より沸点
が高い為、その内に圧縮機１のオイルを溶け込ませた状
態で圧縮機１に帰還する。これによって冷媒回路中のオ
イルは圧縮機１に帰還せしめられる 蒸発器４で得られる冷却温度は使用する冷媒によって
異なるため、使用目的によって選択すると良い。例え
ば、R125とｎ−ペンタンとの組み合わせや、R134aとｎ
−ペンタンの組み合わせは−20℃〜−40℃程の凍結温度
を必要とする通常の家庭用冷凍冷蔵庫にて使用できる。The operation of the refrigerant in the refrigerant circuit in the drawing will be described. The high-temperature and high-pressure gaseous refrigerant mixture discharged from the compressor 1 flows into the condenser 2 to dissipate heat, is decompressed by the capillary tube 3 and flows into the evaporator 4, where it evaporates to exhibit a cooling capacity, and Return to 1. Since n-pentane has a higher boiling point than R125, it returns to the compressor 1 with the oil of the compressor 1 dissolved therein. As a result, the oil in the refrigerant circuit is returned to the compressor 1. The cooling temperature obtained in the evaporator 4 differs depending on the refrigerant used. For example, a combination of R125 and n-pentane, or R134a and n-pentane
The pentane combination can be used in ordinary household refrigerators and freezers requiring a freezing temperature of about -20C to -40C.
ここで、ｎ−ペンタンは沸点が高く、可燃性であるた
め、混合比が大き過ぎると蒸発器４において所要の冷却
温度が得られなくなり、且つ爆発の危険性が出てくる
が、逆に小さ過ぎればオイル戻しの機能が発揮できなく
なる。実験によれば以上のいずれの場合にもｎ−ペンタ
ンは全体の0.1重量％〜14重量％が好適であり、望まし
くは10重量％が良い。Here, since n-pentane has a high boiling point and is flammable, if the mixing ratio is too large, the required cooling temperature cannot be obtained in the evaporator 4 and there is a danger of explosion. If it is too long, the function of returning oil cannot be exhibited. According to experiments, in any of the above cases, the amount of n-pentane is preferably 0.1% by weight to 14% by weight, and more preferably 10% by weight.
図の冷媒回路に適用する他の冷媒としてはR22とｎ−
ペンタンの冷媒混合物が考えられる。その組成はやはり
R22が90重量％、ｎ−ペンタンが10重量％である。Other refrigerants applied to the refrigerant circuit shown in the figure are R22 and n-
Refrigerant mixtures of pentane are conceivable. The composition is still
R22 is 90% by weight and n-pentane is 10% by weight.
この組み合わせで、所要の凍結温度を得るために好適
な組成は、同様にｎ−ペンタンが全体の0.1重量％〜14
重量％であり、望ましくは10重量％が良かった。In this combination, a suitable composition for obtaining the required freezing temperature is also n-pentane, which is 0.1% by weight to 14% by weight of the total.
%, Preferably 10% by weight.
（ト）発明の効果 本発明の冷媒組成物によれば塩素基を含まない冷媒に
ｎ−ペンタンを0.1重量％以上〜14重量％以下の範囲内
で混合したので、可燃性のｎ−ペンタンが漏れたときに
爆発する危険を防止できるとともに、沸点の高いｎ−ペ
ンタンで冷凍能力が低下するのを防止でき、しかも、冷
媒によってオゾン層を破壊する危険性がなく、更に、規
制冷媒であるR-12の冷媒と相溶性があるとともに、塩素
を含まないR-125やR-134a等の冷媒と相溶性のない従来
の圧縮機オイルの相溶性が良いｎ−ペンタンによって冷
媒回路中のオイルを圧縮機に帰還させられるので、圧縮
機の焼き付きを防止できるとともに、従来の鉱物油やア
ルキルベンゼン油等を圧縮機用のオイルとして使用して
いる既存の冷凍機ユニットでも冷媒を交換するだけで使
用することができる。(G) Effect of the Invention According to the refrigerant composition of the present invention, n-pentane is mixed with a refrigerant containing no chlorine group in a range of 0.1% by weight or more and 14% by weight or less. It is possible to prevent the danger of explosion when leaked, to prevent the refrigeration capacity from being reduced by n-pentane having a high boiling point, and to eliminate the risk of destroying the ozone layer by the refrigerant. The refrigerant in the refrigerant circuit is compatible with the conventional refrigerant oil, which is not compatible with the refrigerant such as R-125 or R-134a which does not contain chlorine, while being compatible with the refrigerant of -12. Since it is returned to the compressor, seizure of the compressor can be prevented, and existing refrigerator units that use conventional mineral oil, alkylbenzene oil, etc. as compressor oil can be used simply by replacing the refrigerant. thing It can be.
図面は冷媒回路図である。 １……圧縮機、２……凝縮器、３……キャピラリチュー
ブ、４……蒸発器。The drawing is a refrigerant circuit diagram. 1 ... Compressor, 2 ... Condenser, 3 ... Capillary tube, 4 ... Evaporator
Claims (2)
らなり、このｎ−ペンタンを0.1重量％以上〜14重量％
以下の範囲の割合で塩素基を含まない冷媒に混合したこ
とを特徴とする冷媒組成物。1. A refrigerant comprising chlorine-free refrigerant and n-pentane, wherein said n-pentane is contained in an amount of 0.1% by weight to 14% by weight.
A refrigerant composition characterized by being mixed with a refrigerant containing no chlorine group at a ratio in the following range.
フルオロエタンからなる群の中から選ばれる塩素基を含
まない冷媒にｎ−ペンタンを0.1重量％以上〜14重量％
以下の範囲の割合で混合したことを特徴とする冷媒組成
物。2. A chlorine-free refrigerant selected from the group consisting of pentafluoroethane and 1,1,1,2-tetrafluoroethane, wherein n-pentane is contained in an amount of 0.1% by weight to 14% by weight.
A refrigerant composition characterized by being mixed at a ratio in the following range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2121973A JP2584337B2 (en) | 1990-05-11 | 1990-05-11 | Refrigerant composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2121973A JP2584337B2 (en) | 1990-05-11 | 1990-05-11 | Refrigerant composition |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7029860A Division JP2859154B2 (en) | 1995-02-17 | 1995-02-17 | Refrigeration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0418484A JPH0418484A (en) | 1992-01-22 |
| JP2584337B2 true JP2584337B2 (en) | 1997-02-26 |
Family
ID=14824447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2121973A Expired - Lifetime JP2584337B2 (en) | 1990-05-11 | 1990-05-11 | Refrigerant composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2584337B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5458798A (en) * | 1993-02-05 | 1995-10-17 | E. I. Du Pont De Nemours And Company | Azeotropic and azeotrope-like compositions of a hydrofluorocarbon and a hydrocarbon |
| JPH07173460A (en) | 1993-12-20 | 1995-07-11 | Sanyo Electric Co Ltd | Refrigerant composition and refrigerating equipment |
| GB9522377D0 (en) * | 1995-11-01 | 1996-01-03 | Ici Plc | Refrigerant compositions |
| BR9811011B1 (en) * | 1997-07-15 | 2010-07-27 | refrigerant composition, process for the production of refrigeration, and refrigeration equipment. | |
| US6604368B1 (en) | 1999-10-04 | 2003-08-12 | Refrigerant Products, Ltd. | R 12 replacement refrigerant |
| GB0206413D0 (en) | 2002-03-19 | 2002-05-01 | Refrigerant Products Ltd | Refrigerant for centrifugal compressors |
| WO2007099350A1 (en) | 2006-03-03 | 2007-09-07 | Rpl Holdings Limited | Refrigerant composition |
| KR101518746B1 (en) | 2006-03-03 | 2015-05-08 | 알피엘 홀딩즈 리미티드 | refrigerant composition |
| GB0922288D0 (en) | 2009-12-21 | 2010-02-03 | Rpl Holdings Ltd | Non ozone depleting and low global warming potential refrigerants for refrigeration |
| GB201505230D0 (en) | 2015-03-27 | 2015-05-13 | Rpl Holdings Ltd | Non ozone depleting and low global warming refrigerant blends |
| HUE062111T2 (en) | 2017-11-27 | 2023-09-28 | Rpl Holdings Ltd | Low gwp refrigerant blends |
| IL302179A (en) | 2020-10-22 | 2023-06-01 | Rpl Holdings Ltd | Thermal pump refrigerants |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5679175A (en) * | 1979-11-30 | 1981-06-29 | Daikin Ind Ltd | Absorption refrigerant carrier composition |
| JP2576161B2 (en) * | 1987-11-26 | 1997-01-29 | 旭硝子株式会社 | Working medium mixture |
| JP2576162B2 (en) * | 1987-11-26 | 1997-01-29 | 旭硝子株式会社 | Working medium mixture |
-
1990
- 1990-05-11 JP JP2121973A patent/JP2584337B2/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US7410595B2 (en) | 2002-10-11 | 2008-08-12 | E.I. Du Pont De Nemours And Company | Refrigerant compositions |
| US7648642B2 (en) | 2002-10-11 | 2010-01-19 | E.I. Du Pont De Nemours And Company | Refrigerant compositions |
| US7799240B1 (en) | 2002-10-11 | 2010-09-21 | E.I. Du Pont De Nemours And Company | Refrigerant compositions |
| US7837894B2 (en) | 2002-10-11 | 2010-11-23 | E. I. Du Pont De Nemours And Company | Refrigerant compositions |
| US7641810B2 (en) | 2002-11-29 | 2010-01-05 | Neil Andre Roberts | Refrigerant compositions |
| US7713434B2 (en) | 2002-11-29 | 2010-05-11 | E.I. Du Pont De Nemours And Company | Refrigerant compositions |
| US7771610B2 (en) | 2002-11-29 | 2010-08-10 | E.I. Du Pont De Nemours And Company | Refrigerant compositions |
| US8246851B2 (en) | 2002-11-29 | 2012-08-21 | Roberts Neil Andre | Chiller refrigerants |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0418484A (en) | 1992-01-22 |
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