JPH01108291A - Refrigerant - Google Patents
RefrigerantInfo
- Publication number
- JPH01108291A JPH01108291A JP62264699A JP26469987A JPH01108291A JP H01108291 A JPH01108291 A JP H01108291A JP 62264699 A JP62264699 A JP 62264699A JP 26469987 A JP26469987 A JP 26469987A JP H01108291 A JPH01108291 A JP H01108291A
- Authority
- JP
- Japan
- Prior art keywords
- freon
- refrigerant
- weight
- performance
- coefficient
- 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 36
- GTLACDSXYULKMZ-UHFFFAOYSA-N pentafluoroethane Chemical compound FC(F)C(F)(F)F GTLACDSXYULKMZ-UHFFFAOYSA-N 0.000 claims abstract description 28
- BOUGCJDAQLKBQH-UHFFFAOYSA-N 1-chloro-1,2,2,2-tetrafluoroethane Chemical compound FC(Cl)C(F)(F)F BOUGCJDAQLKBQH-UHFFFAOYSA-N 0.000 claims abstract description 14
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 claims abstract description 13
- NPNPZTNLOVBDOC-UHFFFAOYSA-N 1,1-difluoroethane Chemical compound CC(F)F NPNPZTNLOVBDOC-UHFFFAOYSA-N 0.000 claims abstract description 11
- BHNZEZWIUMJCGF-UHFFFAOYSA-N 1-chloro-1,1-difluoroethane Chemical compound CC(F)(F)Cl BHNZEZWIUMJCGF-UHFFFAOYSA-N 0.000 claims abstract description 9
- -1 fluorocarbon compound Chemical class 0.000 claims description 4
- 238000002156 mixing Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 abstract 2
- 239000000203 mixture Substances 0.000 description 14
- 238000005057 refrigeration Methods 0.000 description 9
- 230000008020 evaporation Effects 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 8
- 239000012530 fluid Substances 0.000 description 5
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 3
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- WXGNWUVNYMJENI-UHFFFAOYSA-N 1,1,2,2-tetrafluoroethane Chemical compound FC(F)C(F)F WXGNWUVNYMJENI-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- JQZFYIGAYWLRCC-UHFFFAOYSA-N 1-chloro-1,1,2,2-tetrafluoroethane Chemical compound FC(F)C(F)(F)Cl JQZFYIGAYWLRCC-UHFFFAOYSA-N 0.000 description 1
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 150000005827 chlorofluoro hydrocarbons Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 239000005437 stratosphere Substances 0.000 description 1
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、冷凍機の動作流体、いわゆる冷媒に関する。[Detailed description of the invention] Industrial applications The present invention relates to a working fluid for a refrigerator, a so-called refrigerant.
従来技術とその問題点
従来、冷媒としては、クロロフルオロ炭化水素、フルオ
ロ炭化水素、これらの共沸組成物並びにその近辺の組成
の組成物が知られている。これらは、フロン又はフロン
系冷媒と称され、現在ジクロロジフルオロメタン（以下
フロン−１２という）、クロロジフルオロメタン（以下
フロン−２２という）等が主に使用されている。しかし
ながら、近年、大気中に放出された場合ある種のフロン
が成層圏のオゾン層を破壊し、その結果、人類を含む地
球上の生態系に重大な悪影響を及ぼすことが指摘されて
いる。このような指摘は、未だ科学的に実証されている
とは言い難いが、趨勢としては、オゾン層破壊の可能性
の高いフロンについては、国際的な取り決めにより、使
用及び生産を統制する方向にある。統制の対象となるフ
ロンの一種にフロン−１２がある。冷凍・空調設備の普
及に伴い、需要が毎年増大しているフロンの使用及び生
産の統制は、居住環境を始めとして、現在の社会機構全
般に与える影響が大きい。従って、冷凍性能、特に成績
係数に優れた冷媒の開発が緊急の課題となっている。オ
ゾン層を破壊するおそれがないフロンとして、ペンタフ
ルオロエタン（フロン−１２５）が考えられるが、これ
は、成績係数が低いのが欠点である。BACKGROUND ART Conventionally, as refrigerants, chlorofluorohydrocarbons, fluorohydrocarbons, azeotropic compositions thereof, and compositions in the vicinity thereof have been known. These are called fluorocarbons or fluorocarbon-based refrigerants, and currently dichlorodifluoromethane (hereinafter referred to as Freon-12), chlorodifluoromethane (hereinafter referred to as Freon-22), etc. are mainly used. However, in recent years, it has been pointed out that certain types of fluorocarbons, when released into the atmosphere, destroy the ozone layer in the stratosphere, and as a result, have a serious negative impact on the earth's ecosystem, including humans. Although it is difficult to say that such points have been scientifically proven, there is a trend towards controlling the use and production of fluorocarbons, which have a high possibility of depleting the ozone layer, through international agreements. be. One type of fluorocarbon that is subject to control is fluorocarbon-12. Control of the use and production of fluorocarbons, whose demand is increasing every year with the spread of refrigeration and air conditioning equipment, has a major impact on the living environment and all of today's social institutions. Therefore, the development of refrigerants with excellent refrigeration performance, particularly with excellent coefficient of performance, has become an urgent issue. Pentafluoroethane (Freon-125) can be considered as a fluorocarbon that has no risk of destroying the ozone layer, but its disadvantage is that it has a low coefficient of performance.
ここに、成績係数とは、冷凍能力／圧縮仕事の比で示さ
れるものである。冷凍能力は、被冷却体が奪われる単位
時間当たりの熱量であり、圧縮仕事は、単位時間当たり
の冷凍機運転のための動力の仕事量であるから、成績係
数は、冷媒の効率に相当するものである。Here, the coefficient of performance is expressed as the ratio of refrigeration capacity/compression work. Refrigeration capacity is the amount of heat taken by the object to be cooled per unit time, and compression work is the amount of power work required to operate the refrigerator per unit time, so the coefficient of performance corresponds to the efficiency of the refrigerant. It is something.
問題点を解決するための手段
本発明者は、成績係数に優れ、且つ大気中に放出された
場合にもオゾン層に及ぼす影響が小さい新たな冷媒を得
るべく、種々研究を重ねてきた。Means for Solving the Problems The present inventor has conducted various studies in order to obtain a new refrigerant that has an excellent coefficient of performance and has a small effect on the ozone layer even when released into the atmosphere.
その結果、フロン−１２５に特定のフロン化合物を配合
する場合には、フロン−１２５よりも優れた成績係数を
発揮することを見出した。As a result, it has been found that when a specific fluorocarbon compound is blended with Freon-125, a coefficient of performance superior to that of Freon-125 is exhibited.
すなわち、本発明は、（１）ペンタフルオロエタンと（
２）クロロテトラフルオロエタン、テトラフルオロエタ
ン、１−クロロ−１，１−ジフルオロエタン及び１，１
−ジフルオロエタンからなる群から選ばれた少くとも１
種のフロン化合物とからなる冷媒に係る。That is, the present invention provides (1) pentafluoroethane and (
2) Chlorotetrafluoroethane, tetrafluoroethane, 1-chloro-1,1-difluoroethane and 1,1
- at least one selected from the group consisting of difluoroethane;
It pertains to a refrigerant consisting of various fluorocarbon compounds.
本発明冷媒組成物は、（１）ペンタフルオロエタン９５
〜５重量％と（２）クロロテトラフルオロエタン、テト
ラフルオロエタン、１−クロロ−１，１−ジフルオロエ
タン（フロン−１４２ｂ）及び１，１−ジフルオロエタ
ン（フロン−１５２ａ）からなる群から選ばれた少くと
も１種のフロン化合物５〜９５重量％とからなることが
好ましい。（１）のフロン−１２５と（２）のフロン化
合物との配合割合が、このような範囲内にある場合には
、フロン−１２５単独の場合に比して、成績係数の大幅
な向上が認められる。特に好ましい混合範囲は、フロン
−１２５とクロロテトラフルオロエタンとからなる冷媒
では、前者８０〜５重量％に対し後者２０〜９５重量％
であり、フロン−１２５とテトラフルオロエタンとから
なる冷媒では、前者６０〜５重量％に対し後者４０〜９
５重量％であり、フロン−１２５と１−クロロ−１，１
−ジフルオロエタンとからなる冷媒では、前者８５〜５
重世％に対し後者１５〜９５重世％であり、フロン−１
２５と１，１−ジフルオロエタンとからなる冷媒では、
前者７０〜５重全％に対し後者３０〜９５重量％でタフ
。The refrigerant composition of the present invention includes (1) pentafluoroethane 95
~5% by weight and (2) a small amount selected from the group consisting of chlorotetrafluoroethane, tetrafluoroethane, 1-chloro-1,1-difluoroethane (Freon-142b) and 1,1-difluoroethane (Freon-152a). It is preferable that both of them consist of 5 to 95% by weight of one type of fluorocarbon compound. When the blending ratio of (1) Freon-125 and (2) Freon compound is within this range, a significant improvement in the coefficient of performance is observed compared to when Freon-125 is used alone. It will be done. In the case of a refrigerant consisting of Freon-125 and chlorotetrafluoroethane, a particularly preferable mixing range is 80 to 5% by weight of the former and 20 to 95% by weight of the latter.
In a refrigerant consisting of Freon-125 and tetrafluoroethane, the former is 60-5% by weight, while the latter is 40-9% by weight.
5% by weight, Freon-125 and 1-chloro-1,1
- For refrigerants consisting of difluoroethane, the former is 85 to 5
The latter is 15 to 95%, and Freon-1
In the refrigerant consisting of 25 and 1,1-difluoroethane,
The former is 70-5% by weight, while the latter is 30-95% by weight, making it tough.
本発明において使用するクロロテトラフルオロエタンと
しては、２−クロロ−１，１，１，２−テトラフルオロ
エタン（フロン−１２４）及び１−クロロ−１，１，２
，２−テトラフルオロエタン（フロン−１２４ａ）が挙
げられ、テトラフルオロエタンとしては、１．１．１．
２−テトラフルオロエタン（フロン−１３４ａ）及び１
，１゜２．２−テトラフルオロエタン（フロン−１３４
）が挙げられる。フロン−１２４とフロン−１２４ａと
は、本発明組成物中で同等の効果を発揮するので、相互
に転換又は混用可能であり、またフロン−１３４ａとフ
ロン−１３４についても同様である。Chlorotetrafluoroethane used in the present invention includes 2-chloro-1,1,1,2-tetrafluoroethane (Freon-124) and 1-chloro-1,1,2
, 2-tetrafluoroethane (Freon-124a), and examples of the tetrafluoroethane include 1.1.1.
2-tetrafluoroethane (Freon-134a) and 1
,1゜2.2-tetrafluoroethane (Freon-134
). Since Freon-124 and Freon-124a exhibit equivalent effects in the composition of the present invention, they can be exchanged or mixed with each other, and the same applies to Freon-134a and Freon-134.
発明の作用及び効果
本発明の冷媒は、比熱比がフロン−２２よりも小さく、
圧縮機の吐出ガス温度がフロン−２２よりも低いので、
例えば、ヒートポンプ式冷暖房機のような比較的温度の
高い冷凍サイクル用の媒体としても、好適である。Functions and Effects of the Invention The refrigerant of the present invention has a specific heat ratio smaller than that of Freon-22,
Since the discharge gas temperature of the compressor is lower than that of Freon-22,
For example, it is suitable as a medium for relatively high temperature refrigeration cycles such as heat pump type air conditioners.
本発明組成物は、非共沸組成物としての特徴を利用する
ことができる。一般に、単一化合物及び共沸組成物では
、蒸発器における蒸発温度は、蒸発が定圧下に行われる
ために、一定であるが、非共沸組成物では、蒸発器入口
で低温となり、蒸発器出口で高温となる。一方、被冷却
流体は、蒸発器での冷媒の流れと向流方向に熱交換する
ように流されるので、冷媒の蒸発温度が一定であっても
、流れに沿って温度勾配を有する。すなわち、蒸発器内
では、冷媒と被冷却流体との温変差は、被冷却流体が進
むにしたがって、小さくなる。本発明による組成物を使
用する場合には、蒸発器内での被冷却流体の温度勾配に
近付けることが可能となり、冷凍の効率、即ち成績係数
を高めることができる。The composition of the present invention can utilize its characteristics as a non-azeotropic composition. Generally, for single compounds and azeotropic compositions, the evaporation temperature in the evaporator is constant because the evaporation is carried out under constant pressure, but for non-azeotropic compositions, the temperature is low at the evaporator inlet, and the evaporation temperature is constant at the evaporator inlet. It becomes hot at the exit. On the other hand, since the fluid to be cooled is flowed so as to exchange heat in a countercurrent direction to the flow of the refrigerant in the evaporator, there is a temperature gradient along the flow even if the evaporation temperature of the refrigerant is constant. That is, within the evaporator, the temperature difference between the refrigerant and the fluid to be cooled becomes smaller as the fluid to be cooled advances. When using the composition according to the invention, it is possible to approach the temperature gradient of the fluid to be cooled in the evaporator, thereby increasing the efficiency of refrigeration, ie the coefficient of performance.
実施例
以下に実施例及び比較例を示し、本発明の特徴とすると
ころをより一層明らかにする。EXAMPLES Examples and comparative examples are shown below to further clarify the characteristics of the present invention.
実施例１〜６及び比較例１
フロン−１２５とフロン−１２４とを第１表に示す種々
の割合（重量比）で混合し、冷媒とした。Examples 1 to 6 and Comparative Example 1 Freon-125 and Freon-124 were mixed at various ratios (weight ratios) shown in Table 1 to prepare refrigerants.
１馬力の冷凍機において、凝縮器における冷媒の凝縮開
始温度を５０℃、蒸発器入口における冷媒の温度温度を
０℃、蒸発器過熱度を５℃とし、第１表に示す組成の冷
媒を使用して、運転を行った。第１表に最高蒸発温度（
℃）、冷凍能力（ｋｃａｌ／ｒｒｆ） 、成績係数及び
圧縮機吐出温度（’Ｃ）を併記する。In a 1-horsepower refrigerator, the condensation start temperature of the refrigerant in the condenser is 50°C, the temperature of the refrigerant at the evaporator inlet is 0°C, the degree of superheating of the evaporator is 5°C, and a refrigerant with the composition shown in Table 1 is used. Then I drove. Table 1 shows the maximum evaporation temperature (
℃), refrigerating capacity (kcal/rrf), coefficient of performance, and compressor discharge temperature ('C).
尚、第１表には、フロン−１２５のみを使用する場合（
比較例１）の結果を合わせて示す。In addition, Table 1 shows the case where only Freon-125 is used (
The results of Comparative Example 1) are also shown.
また、第１図には、フロン−１２５とフロン−１２４と
の組成比と成績係数（曲線Ａ）との関係を表すグラフを
示す。Further, FIG. 1 shows a graph showing the relationship between the composition ratio of Freon-125 and Freon-124 and the coefficient of performance (curve A).
第１表及び第１図に示す結果から、本発明冷媒の優れた
特性が明らかである。From the results shown in Table 1 and FIG. 1, the excellent characteristics of the refrigerant of the present invention are clear.
実施例７〜１２
フロン−１２５とフロン−１３４ａとを第２表に示す種
々の割合（重量比）で混合して得た冷媒を使用する以外
は、実施例１〜６と同様にして、夫々の特性を調べた。Examples 7 to 12 The same procedures as Examples 1 to 6 were carried out, except that refrigerants obtained by mixing Freon-125 and Freon-134a at various ratios (weight ratios) shown in Table 2 were used, respectively. We investigated the characteristics of
第２表に各冷媒の最高蒸発温度（℃）、冷凍能力（ｋｃ
ａｌ／ｒｒｆ’） 、成績係数及び圧縮機吐出温度（℃
）を併記する。Table 2 shows the maximum evaporation temperature (℃) and refrigeration capacity (kc) of each refrigerant.
al/rrf'), coefficient of performance and compressor discharge temperature (℃
) is also written.
また、第２図には、フロン−１２５とフロン−１３４ａ
との組成比と成績係数（曲線Ｂ）との関係を表すグラフ
を示す。In addition, Fig. 2 shows Freon-125 and Freon-134a.
A graph showing the relationship between the composition ratio and the coefficient of performance (curve B) is shown.
実施例１３〜１８
フロン−１２５とフロン−１４２ｂとを第３表に示す種
々の割合（重量比）で混合して得た冷媒を使用する以外
は、実施例１〜６と同様にして、夫々の特性を調べた。Examples 13 to 18 The same procedures as Examples 1 to 6 were carried out, except that refrigerants obtained by mixing Freon-125 and Freon-142b at various ratios (weight ratios) shown in Table 3 were used. We investigated the characteristics of
第３表に各冷媒の最高蒸発温度（℃）、冷凍能力（ｋｃ
ａｌ／ｍ’） 、成績係数及び圧縮機吐出温度（℃）を
併記する。Table 3 shows the maximum evaporation temperature (℃) and refrigeration capacity (kc) of each refrigerant.
al/m'), coefficient of performance, and compressor discharge temperature (°C).
また、第３図には、フロン−１２５とフロン−１４２ｂ
との組成比と成績係数（曲線Ｃ）との関係を表すグラフ
を示す。In addition, Fig. 3 shows Freon-125 and Freon-142b.
A graph showing the relationship between the composition ratio and the coefficient of performance (curve C) is shown.
実施例１９〜２４
フロン−１２５とフロン−１５２ａとを第４表に示す種
々の割合（重量比）で混合して得た冷媒を使用する以外
は、実施例１〜６と同様にして、夫々の特性を調べた。Examples 19-24 The same procedures as Examples 1-6 were carried out, except that refrigerants obtained by mixing Freon-125 and Freon-152a at various ratios (weight ratios) shown in Table 4 were used, respectively. We investigated the characteristics of
第４表に各冷媒の最高蒸発温度（℃）、冷凍能力（ｋｃ
ａｌ／ｒｆ） 、成績係数及び圧縮機吐出温度（°Ｃ）
を併記する。Table 4 shows the maximum evaporation temperature (℃) and refrigeration capacity (kc) of each refrigerant.
al/rf), coefficient of performance and compressor discharge temperature (°C)
Also listed.
また、第４図には、フロン−１２５とフロン−１５２ａ
との組成比と成績係数（曲線Ｄ）との関係を表すグラフ
を示す。In addition, Fig. 4 shows Freon-125 and Freon-152a.
A graph showing the relationship between the composition ratio and the coefficient of performance (curve D) is shown.
第１図乃至第４図は、本発明冷媒の性能を示すグラフで
ある。
（以 上）1 to 4 are graphs showing the performance of the refrigerant of the present invention. (that's all)
Claims (1)
ラフルオロエタン、テトラフルオロエタン、１−クロロ
−１，１−ジフルオロエタン及び１，１−ジフルオロエ
タンからなる群から選ばれた少くとも１種のフロン化合
物とからなる冷媒。 ［２］（１）ペンタフルオロエタン９５〜５重量％と（
２）クロロテトラフルオロエタン、テトラフルオロエタ
ン、１−クロロ−１，１−ジフルオロエタン及び１，１
−ジフルオロエタンからなる群から選ばれた少くとも１
種のフロン化合物５〜９５重量％とからなる特許請求の
範囲第１項に記載の冷媒。 ［３］ペンタフルオロエタン８０〜５重量％とクロロテ
トラフルオロエタン２０〜９５重量％とからなる特許請
求の範囲第２項に記載の冷媒。 ［４］ペンタフルオロエタン６０〜５重量％とテトラフ
ルオロエタン４０〜９５重量％とからなる特許請求の範
囲第２項に記載の冷媒。 ［５］ペンタフルオロエタン８５〜５重量％と１−クロ
ロ−１，１−ジフルオロエタン１５〜９５重量％とから
なる特許請求の範囲第２項に記載の冷媒。 ［６］ペンタフルオロエタン７０〜５重量％と１，１−
ジフルオロエタン３０〜９５重量％とからなる特許請求
の範囲第２項に記載の冷媒。[Scope of Claims] [1] (1) pentafluoroethane and (2) chlorotetrafluoroethane, tetrafluoroethane, 1-chloro-1,1-difluoroethane, and 1,1-difluoroethane selected from the group consisting of A refrigerant consisting of at least one type of fluorocarbon compound. [2] (1) 95 to 5% by weight of pentafluoroethane and (
2) Chlorotetrafluoroethane, tetrafluoroethane, 1-chloro-1,1-difluoroethane and 1,1
- at least one selected from the group consisting of difluoroethane;
The refrigerant according to claim 1, comprising 5 to 95% by weight of a fluorocarbon compound. [3] The refrigerant according to claim 2, comprising 80 to 5% by weight of pentafluoroethane and 20 to 95% by weight of chlorotetrafluoroethane. [4] The refrigerant according to claim 2, comprising 60 to 5% by weight of pentafluoroethane and 40 to 95% by weight of tetrafluoroethane. [5] The refrigerant according to claim 2, comprising 85 to 5% by weight of pentafluoroethane and 15 to 95% by weight of 1-chloro-1,1-difluoroethane. [6] 70-5% by weight of pentafluoroethane and 1,1-
The refrigerant according to claim 2, comprising 30 to 95% by weight of difluoroethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62264699A JPH0655941B2 (en) | 1987-10-19 | 1987-10-19 | Coolant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62264699A JPH0655941B2 (en) | 1987-10-19 | 1987-10-19 | Coolant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01108291A true JPH01108291A (en) | 1989-04-25 |
| JPH0655941B2 JPH0655941B2 (en) | 1994-07-27 |
Family
ID=17406957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62264699A Expired - Lifetime JPH0655941B2 (en) | 1987-10-19 | 1987-10-19 | Coolant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0655941B2 (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991014751A1 (en) * | 1990-03-23 | 1991-10-03 | California Institute Of Technology | Near azeotropic mixture substitute for dichlorodifluoromethane |
| EP0451692A2 (en) * | 1990-04-04 | 1991-10-16 | Daikin Industries, Limited | Refrigerant |
| WO1992001762A1 (en) * | 1990-07-26 | 1992-02-06 | E.I. Du Pont De Nemours And Company | Near-azeotropic blends for use as refrigerants |
| US5262077A (en) * | 1990-04-25 | 1993-11-16 | E. I. Du Pont De Nemours And Company | Halocarbon blends |
| US5277834A (en) * | 1990-07-26 | 1994-01-11 | E. I. Du Pont De Nemours And Company | Near-azeotropic blends for use as refrigerants |
| US5294359A (en) * | 1992-02-03 | 1994-03-15 | Alliedsignal Inc. | Refrigerant compositions |
| US5304319A (en) * | 1989-11-30 | 1994-04-19 | Matsushita Electric Industrial Co., Ltd. | Working fluid |
| US5403504A (en) * | 1990-12-17 | 1995-04-04 | E. I. Du Pont De Nemours And Company | Process for heating and cooling using substantially constant boiling compositions of fluorinated hydrocarbons |
| 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 |
| JPH0848971A (en) * | 1995-07-20 | 1996-02-20 | Daikin Ind Ltd | Refrigerant |
| US5643492A (en) * | 1990-12-17 | 1997-07-01 | E. I. Du Pont De Nemours And Company | Constant boiling compositions of HFC-32, HFC-125 and HFC-134 A |
| US5722256A (en) * | 1990-12-17 | 1998-03-03 | E. I. Du Pont De Nemours And Company | Air conditioner and heat pump with tetrafluoroethane-containing working fluid |
| US5725791A (en) * | 1991-03-28 | 1998-03-10 | E. I. Du Pont De Nemours And Company | Azeotropic and azeotrope-like compositions of 1,1,2,2-tetrafluoroethane |
| 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 |
| US8444873B2 (en) | 2009-06-12 | 2013-05-21 | Solvay Fluor Gmbh | Refrigerant composition |
-
1987
- 1987-10-19 JP JP62264699A patent/JPH0655941B2/en not_active Expired - Lifetime
Cited By (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5304319A (en) * | 1989-11-30 | 1994-04-19 | Matsushita Electric Industrial Co., Ltd. | Working fluid |
| US5728314A (en) * | 1990-03-23 | 1998-03-17 | California Inst. Of Technology | Near azeotropic mixture substitute for dichlorodifluoromethane |
| US5523011A (en) * | 1990-03-23 | 1996-06-04 | California Institute Of Technology | Near azeotropic mixture substitute |
| US5512197A (en) * | 1990-03-23 | 1996-04-30 | The California Institute Of Technology | Near azeotropic mixture substitute for dichlorodifluoromethane |
| WO1991014751A1 (en) * | 1990-03-23 | 1991-10-03 | California Institute Of Technology | Near azeotropic mixture substitute for dichlorodifluoromethane |
| EP0626434A3 (en) * | 1990-04-04 | 1995-02-22 | Daikin Ind Ltd | Refrigerant. |
| JPH03287688A (en) * | 1990-04-04 | 1991-12-18 | Daikin Ind Ltd | Refrigerant |
| EP0626434A2 (en) * | 1990-04-04 | 1994-11-30 | Daikin Industries, Limited | Refrigerant |
| EP0626435A2 (en) * | 1990-04-04 | 1994-11-30 | Daikin Industries, Limited | Refrigerant |
| EP0451692A2 (en) * | 1990-04-04 | 1991-10-16 | Daikin Industries, Limited | Refrigerant |
| EP0626435A3 (en) * | 1990-04-04 | 1997-07-30 | Daikin Ind Ltd | Refrigerant. |
| AU641740B2 (en) * | 1990-04-04 | 1993-09-30 | Daikin Industries, Ltd. | Ternary blended refrigerant |
| US5262077A (en) * | 1990-04-25 | 1993-11-16 | E. I. Du Pont De Nemours And Company | Halocarbon blends |
| US5277834A (en) * | 1990-07-26 | 1994-01-11 | E. I. Du Pont De Nemours And Company | Near-azeotropic blends for use as refrigerants |
| US5800730A (en) * | 1990-07-26 | 1998-09-01 | E. I. Du Pont De Nemours And Compnay | Near-azeotropic blends for use as refrigerants |
| WO1992001762A1 (en) * | 1990-07-26 | 1992-02-06 | E.I. Du Pont De Nemours And Company | Near-azeotropic blends for use as refrigerants |
| US5643492A (en) * | 1990-12-17 | 1997-07-01 | E. I. Du Pont De Nemours And Company | Constant boiling compositions of HFC-32, HFC-125 and HFC-134 A |
| US5722256A (en) * | 1990-12-17 | 1998-03-03 | E. I. Du Pont De Nemours And Company | Air conditioner and heat pump with tetrafluoroethane-containing working fluid |
| US5403504A (en) * | 1990-12-17 | 1995-04-04 | E. I. Du Pont De Nemours And Company | Process for heating and cooling using substantially constant boiling compositions of fluorinated hydrocarbons |
| US5725791A (en) * | 1991-03-28 | 1998-03-10 | E. I. Du Pont De Nemours And Company | Azeotropic and azeotrope-like compositions of 1,1,2,2-tetrafluoroethane |
| US5294359A (en) * | 1992-02-03 | 1994-03-15 | Alliedsignal Inc. | Refrigerant compositions |
| US5624596A (en) * | 1993-02-05 | 1997-04-29 | E. I. Dupont De Nemours And Company | Composition with pentafluoroethane, difuoromethane, and a C4-C9 hydrocarbon |
| 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 |
| 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 |
| JPH0848971A (en) * | 1995-07-20 | 1996-02-20 | Daikin Ind Ltd | Refrigerant |
| 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 |
| US8444873B2 (en) | 2009-06-12 | 2013-05-21 | Solvay Fluor Gmbh | Refrigerant composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0655941B2 (en) | 1994-07-27 |
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