JPH0418484A - Refrigerant composition - Google Patents
Refrigerant compositionInfo
- Publication number
- JPH0418484A JPH0418484A JP2121973A JP12197390A JPH0418484A JP H0418484 A JPH0418484 A JP H0418484A JP 2121973 A JP2121973 A JP 2121973A JP 12197390 A JP12197390 A JP 12197390A JP H0418484 A JPH0418484 A JP H0418484A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- pentane
- compressor
- oil
- weight
- 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.)
- Granted
Links
- 239000003507 refrigerant Substances 0.000 title claims abstract description 45
- 239000000203 mixture Substances 0.000 title claims abstract description 23
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims abstract description 45
- 125000001309 chloro group Chemical group Cl* 0.000 claims abstract description 15
- GTLACDSXYULKMZ-UHFFFAOYSA-N pentafluoroethane Chemical compound FC(F)C(F)(F)F GTLACDSXYULKMZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 claims abstract description 3
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 claims description 9
- 239000010725 compressor oil Substances 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 16
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 11
- 238000009835 boiling Methods 0.000 description 9
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- NPNPZTNLOVBDOC-UHFFFAOYSA-N 1,1-difluoroethane Chemical compound CC(F)F NPNPZTNLOVBDOC-UHFFFAOYSA-N 0.000 description 2
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- DASQIKOOFDJYKA-UHFFFAOYSA-N CCIF Chemical compound CCIF DASQIKOOFDJYKA-UHFFFAOYSA-N 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
Abstract
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。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a refrigerant composition that is used in refrigeration equipment and has 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，ｌ−ジフルオロエタン）との共沸混
合物）が多い。Ｒ１２の化学式はＣＣ１，Ｆ、である。(b) Conventional technology Conventionally, the refrigerants used in refrigerators include R1.
2 (dichlorodifluoromethane) and R500 (azeotropic mixture of R12 and R152a (1,1-difluoroethane)). The chemical formula of R12 is CC1,F.
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。Further, its boiling point is -29.65°C at atmospheric pressure, and the boiling point of R500 is -33.45°C, which is suitable for ordinary refrigeration equipment. Furthermore, even if the suction temperature to the compressor is relatively high, the discharge temperature does not become high enough to cause oil sludge in the compressor. Furthermore, R12 has good compatibility with the oil of the compressor, and also plays the role of drawing the oil in the refrigerant circuit back 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（ＣＩ）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-mentioned refrigerants depletes the ozone layer when released into the atmosphere and reaches the ozone layer above the earth. It is known that this depletion of the ozone layer is caused by chlorine groups (CI) in refrigerants.
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、ＣＨＦ、ＣＦ、）やＲ１３４ａ
（１，１，ｌ、２−テトラフルオロエタン、ＣＨ，Ｆ
ＣＦ、）がこれらの代替冷媒として考えられている。こ
のＲ１２５の沸点は大気圧で一４８℃で、Ｒ１３４ａの
沸点は一２６℃である。Therefore, refrigerants that do not contain this chlorine group, such as R125 (
Pentafluoroethane, CHF, CF, ) and R134a
(1,1,l,2-tetrafluoroethane, CH,F
CF, ) is being considered as an alternative refrigerant for these. The boiling point of 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、ＣＣＩＦ、）Ｔ
）は塩素基（ＣＩ）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Ｒ
２２の沸点は大気圧で４０．７５℃である。Also, R22 (chlorodifluoromethane, CCIF,)T
) contains a chlorine group (CI), but a hydrogen group (H)
Since it is actively decomposed before reaching the ozone layer, there is no risk of destroying the ozone layer. This R
The boiling point of 22 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 mentioned in the previous US Pat. No. 4,810,403, which provides some examples of non-ozone depleting blends 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（Ｃ１）を含まないものとしては
前述のＲ１２５他がまた、塩素基（Ｃ１）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 provides several examples in which a cooling capacity equivalent to that of R12 (dichlorodifluoromethane) described above is achieved by blending multiple refrigerants that do not destroy the ozone layer. Among those that do not contain a chlorine group (C1), the above-mentioned R125 and others also contain a chlorine group (C1) and a hydrogen group (H
) Blends such as 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（Ｃ
１）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（Ｃ１）の存在に依って
いるからである。又、Ｒ２２も塩素基（Ｃ１）を有する
もののオイルとの相溶性は良好ではない。However, the following disadvantages occur in refrigerant blends as shown in the prior art. That is, the above chlorine group (C
Refrigerants that do not contain 1), R125 and R134a, have extremely poor compatibility with the oil of the refrigeration cycle compressor. This is because compatibility with oil depends on the presence of chlorine groups (C1). Further, although R22 also has a chlorine group (C1), 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は摺動部が焼付い
てしまう危険性がある。If the compressor oil does not dissolve in the refrigerant, two-phase separation (separation of oil and refrigerant) will occur in the evaporator of the refrigerant circuit, and the oil will not be returned to the compressor, causing the sliding parts of the compressor bearings to seize. There is a risk that the
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。The present invention aims to solve various problems that the prior art has.
（ニ）課題を解決するための手段
請求項１の発明は、化学式に塩素基を含まない冷媒とｎ
−ペンタンとから冷媒組成物を構成したものである。(d) Means for Solving the Problem The invention of claim 1 provides a refrigerant that does not contain a chlorine group in its chemical formula.
- pentane to form a refrigerant composition.
又、請求項１において塩素基を含まない冷媒をペンタフ
ルオロエタン、ｌ、１，１．２−テトラフルオロエタン
からなる群の中から選んだものである。Further, in claim 1, the refrigerant containing no chlorine group is selected from the group consisting of pentafluoroethane and 1,1,2-tetrafluoroethane.
請求項３の発明は、クロロジフルオロメタンとｎ−ペン
タンとで冷媒組成物を構成したものである
更に、請求項１又は請求項２成るいは請求項３において
、ｎ−ペンタンを０．１重量％以上１４重量％以下とし
たものである。In the invention of claim 3, the refrigerant composition is composed of chlorodifluoromethane and n-pentane. % or more and 14% by weight or less.
（ホ）作用
ｎ−ペンタン（Ｃ５）１．、 ）の沸点は大気圧で＋３
６．０７℃であり、オゾン層を破壊する危険性はない。(e) Action n-pentane (C5) 1. , ) has a boiling point of +3 at atmospheric pressure
The temperature was 6.07°C, and there was no risk of destroying the ozone layer.
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
溶は込ませた状態で圧縮機に帰還せしめる働きをする。In addition, it has very good compatibility with the oil in the compressor of the refrigeration cycle, so by mixing it with R125, R134a, and R22, which have poor compatibility, the oil in the refrigerant circuit can be dissolved in it. It functions to return the gas to the compressor.
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,
Moreover, it is flammable, so if you put too much in, you will not be able to achieve the required freezing temperature, and if it leaks, there is a risk of explosion.
実験によればｎ−ベンクンを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, by mixing 0.1% to 14% by weight of n-benkune, it is possible to obtain the required freezing temperature without impairing the oil return function and avoid the risk of explosion. .
（へ）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（Ｃ１）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。(f) Embodiments Next, embodiments will be explained 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,
4 is an evaporator, which are connected in sequence. This refrigerant circuit is filled with a refrigerant whose chemical formula does not contain a chlorine group (C1), such as a refrigerant mixture of R125 and n-pentane.
その組成はＲ１２５が９０重量％、ｎ−ペンタンが１０
重量％である。Its composition is 90% by weight of R125 and 10% by weight of n-pentane.
Weight%.
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Ｒ
１３４ａ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 R
134a 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のオイルを溶は込ませた
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一り０℃〜−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 drawings will be explained. The high-temperature, high-pressure gaseous refrigerant mixture discharged from the compressor 1 flows into the condenser 2, radiates heat, is reduced in pressure by the capillary tube 3, and flows into the evaporator 4, where it evaporates and exerts its cooling capacity, and the compressor Return to 1. Since n-pentane has a higher boiling point than R125, it is returned to the compressor 1 with the oil from 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 varies depending on the refrigerant used, so it is best to select it depending on the purpose of use. for example,
Combination of R125 and n-pentane, R134a
The combination of n-pentane and n-pentane can be used in ordinary household refrigerator-freezers that require a freezing temperature of about 0°C to -40°C.
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 risk of explosion.
On the other hand, if it is too small, the oil return function cannot be achieved. According to experiments, in any of the above cases, the amount of n-pentane is preferably 0.1% to 14% by weight, 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−
ベンク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 that can be applied to the refrigerant circuit shown in the figure are R22 and n-
Benkun's refrigerant mixture is considered. Its composition is again 90% by weight of R22 and 10% by weight of n-pentane.
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０１重量％〜１４
重量％であり、望ましくは１０重量％が良かった。With this combination, a suitable composition to obtain the required freezing temperature is similarly that n-pentane is 01% to 14% by weight of the total.
% by weight, preferably 10% by weight.
（ト）発明の効果
本発明の冷媒組成物によればオゾン層を破壊する危険性
がなく、更に、圧縮機オイルとの相溶性の良いｎ−ペン
タンによって冷媒回路中のオイルが圧縮機に帰還せしめ
られるので、圧縮機の焼き付きを防止できる。(G) Effects of the Invention According to the refrigerant composition of the present invention, there is no risk of destroying the ozone layer, and furthermore, the oil in the refrigerant circuit is returned to the compressor due to n-pentane, which has good compatibility with compressor oil. This prevents the compressor from seizing up.
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
ュブ、４・・・蒸発器。The drawing is a refrigerant circuit diagram. 1... Compressor, 2... Condenser, 3... Capillary tube, 4... Evaporator.
Claims (1)
組成物。 ２）塩素基を含まない冷媒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
ら選ばれることを特徴とする請求項１記載の冷媒組成物
。 ３）クロロジフルオロメタンとｎ−ペンタンから成る冷
媒組成物。 ４）ｎ−ペンタンを０．１重量％以上１４重量％以下と
したことを特徴とする請求項１又は請求項２或るいは請
求項３記載の冷媒組成物。[Claims] 1) A refrigerant composition comprising a refrigerant containing no chlorine group and n-pentane. 2) The refrigerant that does not contain chlorine groups is pentafluoroethane, 1
, 1,1,2-tetrafluoroethane. 3) A refrigerant composition consisting of chlorodifluoromethane and n-pentane. 4) The refrigerant composition according to claim 1, 2, or 3, characterized in that n-pentane is contained in an amount of 0.1% by weight or more and 14% by weight or less.
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 true JPH0418484A (en) | 1992-01-22 |
| JP2584337B2 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 (15)
| 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 |
| 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 |
| US6214252B1 (en) * | 1995-11-01 | 2001-04-10 | Imperial Chemical Industries Plc | Azeotrope-like compositions of R-134a and n-pentane |
| US6428720B1 (en) * | 1997-07-15 | 2002-08-06 | Rhodia Limited | Refrigerant compositions |
| US6604368B1 (en) | 1999-10-04 | 2003-08-12 | Refrigerant Products, Ltd. | R 12 replacement refrigerant |
| US6991743B2 (en) | 2002-03-19 | 2006-01-31 | Rpl Holdings Limited | Refrigerant for centrifugal compressors |
| 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 |
| US7641810B2 (en) | 2002-11-29 | 2010-01-05 | Neil Andre Roberts | Refrigerant compositions |
| US7972528B2 (en) | 2006-03-03 | 2011-07-05 | Rpl Holdings Limited | Refrigerant composition |
| US8551354B2 (en) | 2006-03-03 | 2013-10-08 | Rpl Holdings Limited | Refrigerant composition |
| US9023231B2 (en) | 2009-12-21 | 2015-05-05 | Rpl Holdings Limited | Non ozone depleting and low global warming potential refrigerants for low temperature refrigeration |
| US10253233B2 (en) | 2015-03-27 | 2019-04-09 | Rpl Holdings Limited | Non-ozone depleting and low global warming refrigerant blends |
| US11459497B2 (en) | 2017-11-27 | 2022-10-04 | Rpl Holdings Limited | Low GWP refrigerant blends |
| US11827834B2 (en) | 2020-10-22 | 2023-11-28 | Rpl Holdings Limited | Thermal pump refrigerants |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0223724D0 (en) | 2002-10-11 | 2002-11-20 | Rhodia Organique Fine Ltd | Refrigerant compositions |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5679175A (en) * | 1979-11-30 | 1981-06-29 | Daikin Ind Ltd | Absorption refrigerant carrier composition |
| JPH01139675A (en) * | 1987-11-26 | 1989-06-01 | Asahi Glass Co Ltd | Working medium mixture |
| JPH01139678A (en) * | 1987-11-26 | 1989-06-01 | Asahi Glass Co Ltd | Working medium mixture |
-
1990
- 1990-05-11 JP JP2121973A patent/JP2584337B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5679175A (en) * | 1979-11-30 | 1981-06-29 | Daikin Ind Ltd | Absorption refrigerant carrier composition |
| JPH01139675A (en) * | 1987-11-26 | 1989-06-01 | Asahi Glass Co Ltd | Working medium mixture |
| JPH01139678A (en) * | 1987-11-26 | 1989-06-01 | Asahi Glass Co Ltd | Working medium mixture |
Cited By (24)
| 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 |
| US5624596A (en) * | 1993-02-05 | 1997-04-29 | E. I. Dupont De Nemours And Company | Composition with pentafluoroethane, difuoromethane, and a C4-C9 hydrocarbon |
| US5670079A (en) * | 1993-02-05 | 1997-09-23 | E. I. Du Pont De Nemours And Company | Azeotropic and azeotrope-like compositions of a hydrofluorocarbon and a hydrocarbon |
| EP0659862A1 (en) * | 1993-12-20 | 1995-06-28 | Sanyo Electric Co. Ltd | Refrigerant composition and refrigerating apparatus |
| US6363741B2 (en) | 1993-12-20 | 2002-04-02 | Sanyo Electric Co., Ltd. | Refrigerant composition and refrigerating apparatus |
| KR100326437B1 (en) * | 1993-12-20 | 2002-06-26 | 다카노 야스아키 | Refrigerant Composition and Refrigeration Equipment |
| US6214252B1 (en) * | 1995-11-01 | 2001-04-10 | Imperial Chemical Industries Plc | Azeotrope-like compositions of R-134a and n-pentane |
| US6428720B1 (en) * | 1997-07-15 | 2002-08-06 | Rhodia Limited | Refrigerant compositions |
| 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 |
| US6604368B1 (en) | 1999-10-04 | 2003-08-12 | Refrigerant Products, Ltd. | R 12 replacement refrigerant |
| US6991743B2 (en) | 2002-03-19 | 2006-01-31 | Rpl Holdings Limited | Refrigerant for centrifugal compressors |
| 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 |
| US7972528B2 (en) | 2006-03-03 | 2011-07-05 | Rpl Holdings Limited | Refrigerant composition |
| US8465664B2 (en) | 2006-03-03 | 2013-06-18 | Rpl Holdings Limited | Refrigerant composition |
| US8551354B2 (en) | 2006-03-03 | 2013-10-08 | Rpl Holdings Limited | Refrigerant composition |
| US9062237B2 (en) | 2006-03-03 | 2015-06-23 | Rpl Holdings Limited | Refrigerant composition |
| US9023231B2 (en) | 2009-12-21 | 2015-05-05 | Rpl Holdings Limited | Non ozone depleting and low global warming potential refrigerants for low temperature refrigeration |
| US10253233B2 (en) | 2015-03-27 | 2019-04-09 | Rpl Holdings Limited | Non-ozone depleting and low global warming refrigerant blends |
| US11459497B2 (en) | 2017-11-27 | 2022-10-04 | Rpl Holdings Limited | Low GWP refrigerant blends |
| US11827834B2 (en) | 2020-10-22 | 2023-11-28 | Rpl Holdings Limited | Thermal pump refrigerants |
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| Publication number | Publication date |
|---|---|
| JP2584337B2 (en) | 1997-02-26 |
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