JPH0655941B2 - Coolant - Google Patents
CoolantInfo
- Publication number
- JPH0655941B2 JPH0655941B2 JP62264699A JP26469987A JPH0655941B2 JP H0655941 B2 JPH0655941 B2 JP H0655941B2 JP 62264699 A JP62264699 A JP 62264699A JP 26469987 A JP26469987 A JP 26469987A JP H0655941 B2 JPH0655941 B2 JP H0655941B2
- 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.)
- Expired - Lifetime
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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。Description: TECHNICAL FIELD The present invention relates to a working fluid of 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。しかしな
がら、近辺、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
上の生態系に増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。2. Description of the Related Art Conventional technology and its problems Conventionally, as refrigerants, chlorofluorohydrocarbons, fluorohydrocarbons, azeotropic compositions thereof, and compositions having compositions in the vicinity thereof are known. These are called chlorofluorocarbons or chlorofluorocarbon refrigerants, and currently dichlorodifluoromethane (hereinafter referred to as chlorofluorocarbon) and chlorodifluoromethane (hereinafter referred to as chlorofluorocarbon) are mainly used. However, it has recently been pointed out that some of the CFCs, when released into the atmosphere, destroy the ozone layer in the stratosphere, resulting in a great adverse effect on the Earth's ecosystem, including humans. Although it is hard to say that such a point has been scientifically proven, the trend is to control the use and production of CFCs, which have a high possibility of ozone depletion, through international agreements. is there. CFC-12 is one of the CFCs that are controlled. With the spread of refrigeration and air-conditioning facilities, the demand for the use and production control of CFCs, which has been increasing every year, has a great impact on the current social mechanisms including the living environment. Therefore, the development of a refrigerant having excellent refrigeration performance, particularly a coefficient of performance, has become an urgent issue. Pentafluoroethane (CFC-125) is considered as a CFC that does not have a risk of depleting the ozone layer, but its disadvantage is that the coefficient of performance is low.
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 indicated by the ratio of refrigerating capacity / compression work. The coefficient of performance corresponds to the efficiency of the refrigerant because the refrigerating capacity is the amount of heat per unit time taken by the object to be cooled and the compression work is the amount of work of power for operating the refrigerator per unit time. It is a thing.
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。その結果、フロン−１
２５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。Means for Solving Problems The present inventor has conducted various studies in order to obtain a new refrigerant having an excellent coefficient of performance and a small influence on the ozone layer even when it is discharged into the atmosphere. As a result, CFC-1
It was found that when a specific freon compound was added to No. 25, the coefficient of performance was superior to that of freon-125.
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
-A refrigerant comprising at least one freon compound selected from the group consisting of -chloro-1,1-difluoroethane and 1,1-difluoroethane.
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４０〜９５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重量％に
対し後者１５〜９５重量％であり、フロン−１２５と
１，１−ジフルオロエタンとからなる冷媒では、前者７
０〜５重量％に対し後者３０〜９５重量％である。The refrigerant composition of the present invention comprises (1) pentafluoroethane 95-
5% by weight and at least one selected from the group consisting of (2) chlorotetrafluoroethane, tetrafluoroethane, 1-chloro-1,1-difluoroethane (CFC-142b) and 1,1-difluoroethane (CFC-152a). It is preferably composed of 5 to 95% by weight of one fluorocarbon compound. When the blending ratio of (1) CFC-125 and (2) CFC compound is within such a range, a significant improvement in the coefficient of performance is recognized as compared with CFC-125 alone. To be A particularly preferable mixing range is Freon-125.
In the refrigerant composed of and chlorotetrafluoroethane, the latter is 20 to 95% by weight with respect to the former 80 to 5% by weight,
In the refrigerant consisting of Freon-125 and tetrafluoroethane, the former is 60 to 5% by weight, and the latter is 40 to 95% by weight.
In the refrigerant consisting of Freon-125 and 1-chloro-1,1-difluoroethane, the latter is 15 to 95% by weight with respect to the former 85 to 5% by weight, and the refrigerant is composed of Freon-125 and 1,1-difluoroethane. With the refrigerant, the former 7
The latter is 30 to 95% by weight with respect to 0 to 5% by weight.
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−１３
４）か挙げられる。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。As chlorotetrafluoroethane used in the present invention, 2-chloro-1,1,1,2-tetrafluoroethane (CFC-124) and 1-chloro-1,1,
2,2-tetrafluoroethane (CFC-124a) can be mentioned, and as tetrafluoroethane, 1,1,1,
2-Tetrafluoroethane (CFC-134a) and 1,1,2,2-tetrafluoroethane (CFC-13)
4) is mentioned. Freon-124 and Freon-124a
Means that they exhibit the same effect in the composition of the present invention, and thus they can be mutually converted or mixed, and the same applies to CFC-134a and CFC-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。Action and Effect 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 also suitable as a medium for a refrigerating cycle having a relatively high temperature such as a heat pump type air conditioner.
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度差は、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 the characteristics as a non-azeotropic composition. In general, for single compounds and azeotropic compositions, the evaporation temperature in the evaporator is constant because evaporation takes place under constant pressure, but for non-azeotropic compositions, the evaporation temperature is low at the evaporator inlet. It becomes hot at the exit. On the other hand, the fluid to be cooled is flowed so as to exchange heat with the flow of the refrigerant in the evaporator in a countercurrent direction, so that even if the evaporation temperature of the refrigerant is constant, there is a temperature gradient along the flow. That is, in the evaporator, the temperature difference between the refrigerant and the fluid to be cooled becomes smaller as the fluid to be cooled advances. When the composition according to the present invention is used, it becomes possible to approach the temperature gradient of the fluid to be cooled in the evaporator, and the refrigeration efficiency, that is, the coefficient of performance can be increased.
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 will be shown below to further clarify the features 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 ratio) 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／m3）、成績係数及び圧縮機吐
出温度（℃）を併記する。In a 1-hp refrigerator, the condensation start temperature of the refrigerant in the condenser is 50 ° C., the temperature of the refrigerant at the inlet of the evaporator is 0 ° C., the degree of superheat of the evaporator is 5 ° C., and the refrigerant having the composition shown in Table 1 is used. Then, I drove. Table 1 shows the maximum evaporation temperature (° C), refrigeration capacity (kcal / m 3 ), 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 also shows the results in the case of using only Freon-125 (Comparative Example 1).
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 properties 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 In the same manner as in Examples 1 to 6 except that refrigerants obtained by mixing Freon-125 and Freon-134a in various ratios (weight ratios) shown in Table 2 were used, respectively. Was investigated.
第２表に各冷媒の最高蒸発温度（℃）、冷凍能力（kcal
／m3）、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 (° C) and refrigeration capacity (kcal) of each refrigerant.
/ M 3 ), coefficient of performance and compressor discharge temperature (° C).
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）との関係を表わすグラ
フを示す。Also, in FIG. 2, Freon-125 and Freon-134a.
7 is a graph showing the relationship between the composition ratio and the coefficient of performance (curve B).
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 In the same manner as in Examples 1 to 6 except that refrigerants obtained by mixing Freon-125 and Freon-142b in various ratios (weight ratios) shown in Table 3 were used, respectively. Was investigated.
第３表に各冷媒の最高蒸発温度（℃）、冷凍能力（kcal
／m3）、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 (° C) and refrigeration capacity (kcal) of each refrigerant.
/ M 3 ), 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。Further, in FIG. 3, Freon-125 and Freon-142b are shown.
7 is a graph showing the relationship between the composition ratio and the coefficient of performance (curve C).
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 to 24 In the same manner as in Examples 1 to 6 except that refrigerants obtained by mixing Freon-125 and Freon-152a in various ratios (weight ratios) shown in Table 4 were used, respectively. Was investigated.
第４表に各冷媒の最高蒸発温度（℃）、冷凍能力（kcal
／m3）、成績係数及び圧縮機吐出温度（℃）を併記す
る。Table 4 shows the maximum evaporation temperature (° C) and refrigeration capacity (kcal) of each refrigerant.
/ M 3 ), coefficient of performance and compressor discharge temperature (° C).
また、第４図には、フロン−１２５とフロン−１５２ａ
との組成比を成績係数（曲線Ｄ）との関係を表すグラフ
を示す。Further, in FIG. 4, Freon-125 and Freon-152a are shown.
9 is a graph showing the relationship between the composition ratio and the coefficient of performance (curve D).
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。1 to 4 are graphs showing the performance of the refrigerant of the present invention.
Claims (6)
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。1. At least one selected from the group consisting of (1) pentafluoroethane and (2) chlorotetrafluoroethane, tetrafluoroethane, 1-chloro-1,1-difluoroethane and 1,1-difluoroethane. A refrigerant composed of a CFC compound.
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。2. (1) Pentafluoroethane 95 to 5% by weight
And (2) chlorotetrafluoroethane, tetrafluoroethane, 1-chloro-1,1-difluoroethane and 1,
The refrigerant according to claim 1, comprising 5 to 95% by weight of at least one freon compound selected from the group consisting of 1-difluoroethane.
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。3. The refrigerant according to claim 2, comprising 80 to 5% by weight of pentafluoroethane and 20 to 95% by weight of chlorotetrafluoroethane.
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。4. The refrigerant according to claim 2, comprising 60 to 5% by weight of pentafluoroethane and 40 to 95% by weight of tetrafluoroethane.
−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。5. Pentafluoroethane 85-5% by weight and 1
-Chloro-1,1-difluoroethane 15-95% by weight
The refrigerant according to claim 2, which comprises
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。6. The refrigerant according to claim 2, comprising 70 to 5% by weight of pentafluoroethane and 30 to 95% by weight of 1,1-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 JPH01108291A (en) | 1989-04-25 |
| JPH0655941B2 true 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) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5304319A (en) * | 1989-11-30 | 1994-04-19 | Matsushita Electric Industrial Co., Ltd. | Working fluid |
| AU7470991A (en) * | 1990-03-23 | 1991-10-21 | California Institute Of Technology | Near azeotropic mixture substitute for dichlorodifluoromethane |
| JP2792191B2 (en) * | 1990-04-04 | 1998-08-27 | ダイキン工業株式会社 | Coolant |
| 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 |
| ES2102759T3 (en) * | 1990-07-26 | 1997-08-01 | Du Pont | ALMOST AZEOTROPIC MIXTURES 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 |
| 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 |
| 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 |
| US5294359A (en) * | 1992-02-03 | 1994-03-15 | Alliedsignal Inc. | Refrigerant compositions |
| 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 |
| JP2795224B2 (en) * | 1995-07-20 | 1998-09-10 | ダイキン工業株式会社 | Coolant |
| EP1195421A3 (en) | 1997-07-15 | 2008-02-27 | E.I.Du pont de nemours and company | Refrigerant compositions |
| US7258813B2 (en) | 1999-07-12 | 2007-08-21 | E.I. Du Pont De Nemours And Company | Refrigerant composition |
| GB0223724D0 (en) | 2002-10-11 | 2002-11-20 | Rhodia Organique Fine Ltd | Refrigerant compositions |
| AU2003285568B2 (en) | 2002-11-29 | 2009-02-19 | E.I. Du Pont De Nemours & Company | Chiller refrigerants |
| 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
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01108291A (en) | 1989-04-25 |
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