JPH08127767A - Working fluid - Google Patents
Working fluidInfo
- Publication number
- JPH08127767A JPH08127767A JP6267611A JP26761194A JPH08127767A JP H08127767 A JPH08127767 A JP H08127767A JP 6267611 A JP6267611 A JP 6267611A JP 26761194 A JP26761194 A JP 26761194A JP H08127767 A JPH08127767 A JP H08127767A
- Authority
- JP
- Japan
- Prior art keywords
- working fluid
- refrigerant
- point
- present
- difluoromethane
- 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
- 239000012530 fluid Substances 0.000 title claims abstract description 40
- RWRIWBAIICGTTQ-UHFFFAOYSA-N difluoromethane Chemical compound FCF RWRIWBAIICGTTQ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004341 Octafluorocyclobutane Substances 0.000 claims abstract description 10
- BCCOBQSFUDVTJQ-UHFFFAOYSA-N octafluorocyclobutane Chemical compound FC1(F)C(F)(F)C(F)(F)C1(F)F BCCOBQSFUDVTJQ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 235000019407 octafluorocyclobutane Nutrition 0.000 claims abstract description 10
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003507 refrigerant Substances 0.000 abstract description 39
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 abstract description 12
- 239000004615 ingredient Substances 0.000 abstract 1
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 18
- 238000005057 refrigeration Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000011555 saturated liquid Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000005437 stratosphere Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- 229940029284 trichlorofluoromethane Drugs 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Landscapes
- Lubricants (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、冷暖房運転や給湯・冷
凍などに供するヒートポンプ装置に使用され、且つオゾ
ン層を破壊する危険性のない作動流体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working fluid used in a heat pump device for heating and cooling operations, hot water supply and freezing, and having no danger of destroying the ozone layer.
【０００２】[0002]
【従来の技術】従来、室内空調に利用するヒートポンプ
装置において冷媒として広く使用されてきたフロン類
（以下、特定フロンと記す）は、燃性、爆発性、毒性が
なく、また、通常の状態では金属部を腐食することもな
いなど、極めて使用特性に優れている。2. Description of the Related Art Freon, which has been widely used as a refrigerant in a heat pump apparatus used for indoor air conditioning (hereinafter, referred to as "specific freon"), is not flammable, explosive, or toxic, and is in a normal state. It has excellent usage characteristics such as not corroding metal parts.
【０００３】しかし、化学的に極めて安定であるとして
広く使用されてきた特定フロンも、大気中に放出される
と成層圏に入り、紫外線によって分解させるまで極めて
長期間に渡って滞留し、紫外線を遮って地上の人間を含
む生物を保護しているオゾン層を破壊するとして、その
使用が国際的に制限されてきている。However, specific CFCs, which have been widely used as being chemically stable, enter the stratosphere when released into the atmosphere and stay for a very long time until they are decomposed by UV rays, and block UV rays. Its use has been internationally restricted as it destroys the ozone layer, which protects organisms including humans on the ground.
【０００４】このため、最近では従来使用してきた特定
フロンの代替冷媒として、特定フロンに比べ成層圏オゾ
ン層破壊能力が低いクロロジフルオロメタン（ＣＨＣｌ
Ｆ2、Ｒ２２）が用いられている。Therefore, chlorodifluoromethane (CHCl), which has a lower stratospheric ozone depletion capacity than specific fluorocarbons, has been recently used as an alternative refrigerant for the specific fluorocarbons used conventionally.
F 2 , R22) is used.
【０００５】[0005]
【発明が解決しようとする課題】そして、このＲ２２は
特定フロンの一種であるトリクロロフルオロメタン（Ｃ
Ｃｌ3Ｆ、Ｒ１１）の成層圏オゾン破壊能力を１とした
ときの成層圏オゾン破壊能力を示すオゾン破壊係数（以
下、ＯＤＰと記す）が、0.05と極めて小さく特定フロン
ではないものの、冷凍・空調機器が広く普及した現在で
は、将来的にＲ２２の使用量及び生産量が増大すること
が予想され、Ｒ２２の成層圏オゾン層に与える影響も無
視できないものとなる。The R22 is trichlorofluoromethane (C
The ozone depletion coefficient (hereinafter referred to as ODP), which indicates the stratospheric ozone depletion ability when Cl 3 F, R11) is set to 1, is extremely small at 0.05 and is not a specified CFC, but With its widespread use, it is expected that the amount of R22 used and produced will increase in the future, and the effect of R22 on the stratospheric ozone layer cannot be ignored.
【０００６】このため、成層圏オゾン層に及ぼす影響が
ほとんどない、Ｒ２２の代替冷媒となる作動流体の早期
開発が望まれている。本発明は、斯かる点に鑑みてなさ
れたものであって、ＯＤＰが０で、且つＲ２２と同等ま
たはそれ以上の冷媒特性を有する作動流体を提供するも
のである。Therefore, there is a demand for early development of a working fluid that is an alternative refrigerant for R22 and has little effect on the stratospheric ozone layer. The present invention has been made in view of the above circumstances, and provides a working fluid having a ODP of 0 and a refrigerant characteristic equal to or higher than that of R22.
【０００７】[0007]
【課題を解決するための手段】第１の発明の作動流体
は、ジフルオロメタン（ＣＨ4Ｆ2、Ｒ３２）４０重量％
以下、オクタフルオロシクロブタン（Ｃ4Ｆ8、ＲＣ３１
８）２５重量％以下、残部が1,1,1,2-テトラフルオロエ
タン（Ｃ2Ｈ2Ｆ4、Ｒ１３４ａ）であって、オクタフル
オロシクロブタン及びジフルオロメタンの成分比が添付
の図８の点線で示す点Ａ（ 0,40）、点Ｂ（25,25）、点
Ｃ（15,15）、点Ｄ（10,10）及び点Ｅ（ 0,15）で囲ま
れる範囲であり、少なくとも前記三種の成分を含むもの
である。The working fluid of the first invention is 40% by weight of difluoromethane (CH 4 F 2 , R32).
Hereinafter, octafluorocyclobutane (C 4 F 8 , RC31
8) 25% by weight or less, the balance is 1,1,1,2-tetrafluoroethane (C 2 H 2 F 4 , R134a), and the component ratio of octafluorocyclobutane and difluoromethane is the dotted line in the attached FIG. Is a range surrounded by a point A (0,40), a point B (25,25), a point C (15,15), a point D (10,10) and a point E (0,15), and at least the above It contains three components.
【０００８】また、第２の発明の作動流体は、ジフルオ
ロメタン２５重量％以下、オクタフルオロシクロブタン
２５重量％以下、残部が1,1,1,2-トラフルオロエタンで
あって、オクタフルオロシクロブタン及びジフルオロメ
タンの成分比が添付の図８の実線で示す点Ｃ（15,1
5）、点Ｄ（10,10）、点Ｅ（ 0,15）及び点Ｆ（ 0,20）
で囲まれる範囲であり、少なくとも前記三種の成分を含
むものである。The working fluid of the second invention comprises difluoromethane of 25% by weight or less, octafluorocyclobutane of 25% by weight or less, and the balance of 1,1,1,2-trafluoroethane. The component ratio of difluoromethane is point C (15,1
5), point D (10,10), point E (0,15) and point F (0,20)
It is the range surrounded by and contains at least the above-mentioned three kinds of components.
【０００９】[0009]
【作用】本発明によれば、作動流体をオゾン破壊係数Ｏ
ＤＰが０であるジフルオロメタン、オクタフルオロシク
ロブタン及び1,1,1,2-テトラフルオロエタンの三種の混
合物から構成しているので、成層圏オゾン層を破壊する
虞れがない。According to the present invention, the working fluid has an ozone depletion coefficient of O
Since it is composed of a mixture of three kinds of difluoromethane having a DP of 0, octafluorocyclobutane and 1,1,1,2-tetrafluoroethane, there is no risk of depleting the stratospheric ozone layer.
【００１０】また、前記混合物からなる作動流体は、Ｒ
２２と同等またはそれ以上の冷媒特性を有し、Ｒ２２の
代替冷媒として優れている。更に、第２の発明によれ
ば、蒸発器または凝縮器を通過する前後の作動流体の温
度差が５℃以下となるので、熱交換効率の低下や蒸発器
への霜の付着などを引き起こす虞れがない。The working fluid composed of the mixture is R
It has a refrigerant characteristic equal to or higher than that of No. 22, and is excellent as an alternative refrigerant to R22. Further, according to the second aspect of the present invention, the temperature difference between the working fluid before and after passing through the evaporator or the condenser is 5 ° C. or less, which may cause a decrease in heat exchange efficiency and adhesion of frost to the evaporator. There is no
【００１１】[0011]
【実施例】以下、本発明の一実施例につき図面に沿って
詳述する。図１は、本発明の作動流体を試験したヒート
ポンプ装置であって、循環路中に圧縮機１、凝縮器２、
減圧器３および蒸発器４を順に設けて形成した冷凍サイ
クル内に、作動流体を循環させている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a heat pump device for testing a working fluid of the present invention, which includes a compressor 1, a condenser 2,
A working fluid is circulated in a refrigeration cycle formed by sequentially providing a pressure reducer 3 and an evaporator 4.
【００１２】冷凍システム内での作動流体の流れを、図
１および図２を用いて説明する。ここで、図２は、上記
冷凍サイクルのモリエル線図を示しており、縦軸に圧
力、横軸にエンタルピーをとっている。尚、図中、ｘは
冷媒の気相状態、液相状態および気液２相状態の境界を
示す曲線であり、頂点ｙより右側の曲線部分は飽和蒸気
線を示し、頂点ｙより左側の曲線部分は飽和液線を示し
ている。The flow of the working fluid in the refrigeration system will be described with reference to FIGS. 1 and 2. Here, FIG. 2 shows a Mollier diagram of the refrigeration cycle, in which the vertical axis represents pressure and the horizontal axis represents enthalpy. In the figure, x is a curve indicating the boundary between the vapor phase state, the liquid phase state and the gas-liquid two-phase state of the refrigerant, the curved portion on the right side of the vertex y indicates the saturated vapor line, and the curved line on the left side of the vertex y. The part shows a saturated liquid line.
【００１３】そして、上記の飽和蒸気線の右側の領域で
は冷媒は過熱蒸気であり、飽和蒸気線の左側の領域では
冷媒は湿り蒸気となっている。また、上記の飽和液線の
左側の領域では冷媒は液体状態であり、飽和液線の右側
の領域では冷媒は湿り蒸気となっている。In the area on the right side of the saturated vapor line, the refrigerant is superheated steam, and in the area on the left side of the saturated vapor line, the refrigerant is wet steam. Further, the refrigerant is in a liquid state in the area on the left side of the saturated liquid line, and the refrigerant is wet vapor in the area on the right side of the saturated liquid line.
【００１４】よって、蒸発器４から送り込まれた低圧の
ガス状冷媒を、圧縮機１により圧縮することによって高
温高圧のガス状冷媒に変換して（図中ａ−ｂ間）、凝縮
器２へ高温高圧に圧縮されたガス状冷媒を送り込んでい
る。Therefore, the low-pressure gaseous refrigerant sent from the evaporator 4 is converted into the high-temperature and high-pressure gaseous refrigerant by compressing it with the compressor 1 (between a and b in the figure), and then to the condenser 2. It sends in a gaseous refrigerant compressed to high temperature and high pressure.
【００１５】そして、圧縮機１から送り込まれた高温高
圧のガス状冷媒を、凝縮器２において空気または水等で
冷却することによって、高温高圧のガス状冷媒から熱を
奪い、ガス状冷媒を液化させて（図中ｂ−ｃ間）、減圧
器３へ高圧の液状冷媒を送り込んでいる。By cooling the high temperature and high pressure gaseous refrigerant sent from the compressor 1 with air or water in the condenser 2, heat is taken from the high temperature and high pressure gaseous refrigerant and the gaseous refrigerant is liquefied. Then, the high-pressure liquid refrigerant is sent to the decompressor 3 (b-c in the figure).
【００１６】高圧の液状冷媒は、減圧器３により高温高
圧の液状冷媒を減圧して、蒸発しやすい低温低圧の液状
冷媒に変換される（図中ｃ−ｄ間）。そして、減圧器３
から送り込まれた低温の液状冷媒が、蒸発器４内を通過
する間に周囲から熱を奪うことによって蒸発し、低圧の
ガス状冷媒が圧縮機１内に再び送り込まれる。The high-pressure liquid refrigerant is decompressed by the decompressor 3 to be converted into a low-temperature low-pressure liquid refrigerant that easily evaporates (between cd and d in the figure). And decompressor 3
The low-temperature liquid refrigerant sent from is evaporated by removing heat from the surroundings while passing through the evaporator 4, and the low-pressure gaseous refrigerant is sent into the compressor 1 again.
【００１７】以上の冷凍サイクルが繰り返すことによっ
て、凝縮器２で放熱を行い、蒸発器４で吸熱により冷凍
を発生させている。次に、上記構成の冷凍システムを用
い、本発明の作動流体のＲ３２、ＲＣ３１８及びＲ１３
４ａの重量％を１％づつ変化させ、ヒートポンプ装置の
性能を示す５つの熱物性（成績係数、冷凍効果、吐出圧
力、蒸発前後の冷媒温度差及び凝縮前後の冷媒温度差）
を夫々測定し、冷媒としてＲ２２を用いた場合の各熱物
性値と比較した。その結果について以下に説明する。By repeating the above refrigeration cycle, the condenser 2 radiates heat and the evaporator 4 absorbs heat to generate refrigeration. Next, using the refrigeration system having the above-described configuration, the working fluids R32, RC318, and R13 of the present invention are used.
5 thermophysical properties showing the performance of the heat pump device by changing the weight% of 4a by 1% (performance coefficient, refrigeration effect, discharge pressure, refrigerant temperature difference before and after evaporation, and refrigerant temperature difference before and after condensation)
Was measured and compared with each thermophysical property value when R22 was used as the refrigerant. The results will be described below.
【００１８】Ｒ２２における各熱物性値を表１に示し、
Ｒ３２、ＲＣ３１８及びＲ１３４ａの混合比に対する各
熱物性値の測定結果の一部を表２に示す。尚、表１及び
表２の値は蒸発温度−５℃、凝縮温度４０℃の場合の値
であり、この蒸発温度及び凝縮温度は、一般にヒートポ
ンプ装置が使用される利用温度範囲が−５〜４０℃であ
ることに基づいて設定した。Table 1 shows the thermophysical properties of R22.
Table 2 shows a part of the measurement results of each thermophysical property value with respect to the mixing ratio of R32, RC318 and R134a. The values in Table 1 and Table 2 are values when the evaporation temperature is -5 ° C and the condensation temperature is 40 ° C, and the evaporation temperature and the condensation temperature are generally in the range of -5 to 40 in which the heat pump device is used. It was set based on being in ° C.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】ここで、成績係数（以下、ＣＯＰと記す）
とは、得られた冷凍効果を示す仕事量（図２に示す蒸発
過程（ｄ〜ａ）のエンタルピーの変化量）と、冷凍を得
るために費やした仕事量（図２に示す圧縮過程（ａ〜
ｂ）のエンタルピーの変化量）の比（（Ｈa−Ｈd）／
（Ｈb−Ｈa））であって、ＣＯＰが大きいほど冷凍シス
テムのエネルギー効率が良い。Here, the coefficient of performance (hereinafter referred to as COP)
Here, the amount of work (the amount of change in the enthalpy of the evaporation process (d to a) shown in FIG. 2) showing the obtained refrigerating effect and the amount of work expended to obtain the freezing (compression process (a shown in FIG. 2 ~
b) Enthalpy change) ratio ((Ha-Hd) /
(Hb−Ha)), and the larger the COP, the better the energy efficiency of the refrigeration system.
【００２２】冷凍効果（以下、Ｈiと記す）とは、１kg
の冷媒液が蒸発器４で蒸気に変化するときに吸収する熱
量（図２に示す蒸発過程（ｄ〜ａ）のエンタルピーの変
化量）（Ｈa−Ｈd）であり、このＨiが大きいほど冷凍
システムにおける吸熱量が大きい。Freezing effect (hereinafter referred to as Hi) is 1 kg
Is the amount of heat absorbed when the refrigerant liquid of FIG. 2 changes into vapor in the evaporator 4 (the amount of change in the enthalpy of the evaporation process (d to a) shown in FIG. 2) (Ha-Hd), and the higher this Hi, the higher the refrigeration system. Has a large endotherm.
【００２３】吐出圧力（以下、Ｐcond）とは、図１の圧
縮機１から作動流体が吐出されるときの圧力である。蒸
発前後の冷媒温度差（以下、Ｔvと記す）とは、図１の
蒸発器４を通過する前後の作動流体の温度の差であり、
この差が大きくなると冷凍システムに霜が付く可能性が
あると共に、熱交換効率が低下する。The discharge pressure (hereinafter, Pcond) is a pressure at which the working fluid is discharged from the compressor 1 shown in FIG. The refrigerant temperature difference before and after evaporation (hereinafter referred to as Tv) is the difference in temperature of the working fluid before and after passing through the evaporator 4 in FIG.
When this difference becomes large, the refrigeration system may be frosted, and the heat exchange efficiency is reduced.
【００２４】凝縮前後の冷媒温度差（以下、Ｔcと記
す）とは、図１の凝縮器２を通過する前後の作動流体の
温度の差であり、この差が大きくなると冷凍システムの
熱交換効率が低下する。The refrigerant temperature difference before and after condensation (hereinafter referred to as Tc) is the difference between the temperatures of the working fluid before and after passing through the condenser 2 in FIG. 1. If this difference becomes large, the heat exchange efficiency of the refrigeration system will increase. Is reduced.
【００２５】冷凍システムでは、このＣＯＰ、Ｈi、Ｐc
ond、Ｔv及びＴcは、共に作動流体として適しているか
否かの判断基準であり、特にＣＯＰ、Ｈi及びＰcondは
冷凍システムを構成する上で特に重要な判断基準とな
る。また、Ｔv、Ｔcは共に５℃以下であれば冷凍システ
ムへの上記熱交換効率の低下や蒸発器４への霜の付着な
どは特に問題とならない。In the refrigeration system, this COP, Hi, Pc
Ond, Tv, and Tc are criteria for determining whether they are suitable as working fluids, and COP, Hi, and Pcond are particularly important criteria for configuring a refrigeration system. Further, if both Tv and Tc are 5 ° C. or less, the heat exchange efficiency of the refrigeration system is not reduced, and the frost is not attached to the evaporator 4.
【００２６】図３ないし図８はすべて、縦軸にＲ３２、
横軸にＲＣ３１８を夫々重量％で示しており、残部はＲ
１３４ａが占めている。図３は、本発明の作動流体のＣ
ＯＰを示したものであり、Ｒ２２のＣＯＰ値（＝4.8）
を許容下限とし、これを満たしている部分を領域Ｑで示
す。尚、図中の数字はＣＯＰ値を表しており、図中の線
は等値線を表している。3 to 8, the vertical axis is R32,
RC318 is shown in weight% on the horizontal axis, and the balance is R
It is occupied by 134a. FIG. 3 shows C of the working fluid of the present invention.
It shows OP, COP value of R22 (= 4.8)
Is a permissible lower limit, and a region that satisfies this is shown as a region Q. The numbers in the figure represent COP values, and the lines in the figure represent isolines.
【００２７】図４は、本発明の作動流体のＨiを示した
ものである。Ｒ２２のＨi値は（＝155kJ/kg）であるの
で、本実施例ではＨiの許容下限を150kJ/kgとし、これ
を満たしている部分を領域Ｒで示す。尚、図中の数字は
Ｈi値を表しており、図中の線は等値線を表している。FIG. 4 shows Hi of the working fluid of the present invention. Since the Hi value of R22 is (= 155 kJ / kg), the permissible lower limit of Hi is 150 kJ / kg in the present embodiment, and the region satisfying this is shown by the region R. The numbers in the figure represent Hi values, and the lines in the figure represent isolines.
【００２８】図５は、本発明の作動流体のＰcondを示し
たものである。本実施例では、Ｒ２２のＰcond値は1537
kPaであるが、若干の余裕を考慮してＰcondの許容範囲
を1300kPa〜1700kPaとし、これを満たしている部分を領
域Ｓで示す。尚、図中の数字はＰcond値を表しており、
図中の線は等値線を表している。FIG. 5 shows Pcond of the working fluid of the present invention. In this embodiment, the Pcond value of R22 is 1537.
Although it is kPa, the permissible range of Pcond is set to 1300 kPa to 1700 kPa in consideration of some margin, and a region S that satisfies this is shown by a region S. The numbers in the figure represent the Pcond value,
The lines in the figure represent isolines.
【００２９】図６は、本発明の作動流体のＴvを示した
ものである。Ｒ２２は単一組成の冷媒であるのでＴvは
０℃である。本実施例では、Ｔvの許容上限を５℃と
し、これを満たしている部分をの領域Ｕで示す。FIG. 6 shows the Tv of the working fluid of the present invention. Since R22 is a refrigerant having a single composition, Tv is 0 ° C. In this embodiment, the allowable upper limit of Tv is set to 5 ° C., and a portion satisfying the upper limit is indicated by a region U.
【００３０】図７は、本発明の作動流体のＴcを示した
ものである。Ｒ２２のＴcはＴvと同様に単一組成の冷媒
であるので０℃である。本実施例では、Ｔcの許容上限
を５℃とし、これを満たしている部分を領域Ｗで示す。FIG. 7 shows Tc of the working fluid of the present invention. Tc of R22 is 0 ° C. because it is a refrigerant having a single composition like Tv. In this embodiment, the allowable upper limit of Tc is set to 5 ° C., and a portion satisfying the upper limit is indicated by a region W.
【００３１】上記図３ないし図７に示す実験結果に基づ
き、ＣＯＰ、Ｈi及びＰcondが上記許容範囲にあるＲＣ
３１８とＲ３２の成分比は、図８の点線で示す点Ａ（
0,40）、点Ｂ（25,25）、点Ｃ（15,15）、点Ｄ（10,1
0）及び点Ｅ（ 0,15）で囲まれる範囲であって、残部が
Ｒ１３４ａであり、Ｒ３２、ＲＣ３１８及びＲ１３４ａ
のいずれかの成分比が０となる部分を除く重量％の範囲
内である少なくとも前記三種の成分から構成されるもの
である。この作動流体では、ＯＤＰが０で、且つＣＯ
Ｐ、Ｈi及びＰcondがＲ２２と同等またはそれ以上の冷
媒特性を有する。Based on the experimental results shown in FIGS. 3 to 7, RC in which COP, Hi and Pcond are in the above-mentioned permissible range
The component ratio of 318 and R32 is the point A (shown by the dotted line in FIG.
0,40), point B (25,25), point C (15,15), point D (10,1)
0) and the point E (0,15), the remainder is R134a, and R32, RC318, and R134a
It is composed of at least the above-mentioned three kinds of components within the range of weight% excluding the portion where any one of the component ratios is 0. With this working fluid, ODP is 0 and CO
P, Hi and Pcond have refrigerant characteristics equal to or higher than R22.
【００３２】更に、ＣＯＰ、Ｈi、Ｐcond、Ｔv及びＴc
が上記許容範囲にあるＲＣ３１８とＲ３２の成分比は、
図８の実線で示す点Ｃ（15,15）、点Ｄ（10,10）、点Ｅ
（ 0,15）及び点Ｆ（ 0,20）で囲まれる範点であって、
残部がＲ１３４ａであり、Ｒ３２、ＲＣ３１８及びＲ１
３４ａのいずれかの成分比が０となる部分を除く重量％
の範囲内である少なくとも前記三種の成分から構成され
るものである。この作動流体では、ＯＤＰが０で、且つ
ＣＯＰ、Ｈi及びＰcondがＲ２２と同等またはそれ以上
の冷媒特性を有すると共に、Ｔv及びＴcが５℃以下とな
るので、熱交換効率の低下や蒸発器への霜の付着などを
引き起こす虞れがない。Further, COP, Hi, Pcond, Tv and Tc
The component ratio of RC318 and R32 within the above allowable range is
Point C (15,15), point D (10,10), point E shown by the solid line in FIG.
A range surrounded by (0,15) and a point F (0,20),
The rest is R134a, R32, RC318 and R1
Weight% excluding the portion where the ratio of any of 34a is 0
It is composed of at least the above-mentioned three kinds of components within the range. In this working fluid, ODP is 0, and COP, Hi and Pcond have refrigerant characteristics equal to or higher than R22, and Tv and Tc are 5 ° C. or less, so that heat exchange efficiency is reduced and vaporization to the evaporator is reduced. There is no risk of causing frost adhesion.
【００３３】また、上記Ｒ３２は可燃性の冷媒であり、
ＲＣ３１８及びＲ１３４ａは不燃の冷媒である。従っ
て、ＲＣ３１８及びＲ１３４ａの重量％が大きい作動流
体の方が安全性は高い。Further, R32 is a flammable refrigerant,
RC318 and R134a are nonflammable refrigerants. Therefore, the working fluid in which the weight percentage of RC318 and R134a is large is safer.
【００３４】尚、上記実施例では作動流体としてＲ３
２、ＲＣ３１８及びＲ１３４ａの三種の成分のみから構
成される場合について説明したが、この三種以外に潤滑
油、腐食防止剤等を混入させても構わない。In the above embodiment, R3 is used as the working fluid.
Although the case where it is composed of only three components of 2, RC318 and R134a has been described, a lubricating oil, a corrosion inhibitor and the like may be mixed in addition to these three components.
【００３５】[0035]
【発明の効果】以上のとおり本発明によれば、作動流体
をオゾン破壊係数が０であるジフルオロメタン、オクタ
フルオロシクロブタン及び1,1,1,2-テトラフルオロエタ
ンの三種の混合冷媒から構成しているので、成層圏オゾ
ン層を破壊する虞れがない。As described above, according to the present invention, the working fluid is composed of three kinds of mixed refrigerants of difluoromethane having an ozone depletion potential of 0, octafluorocyclobutane and 1,1,1,2-tetrafluoroethane. Therefore, there is no danger of destroying the stratospheric ozone layer.
【００３６】また、従来の機器の利用温度においてＲ２
２と同等またはそれ以上の冷媒特性を有するので、Ｒ２
２よりも高い成績係数及び冷凍効果を期待できると共
に、Ｒ２２の代替として現行機器をそのまま使用するこ
とができ、機器を新たに交換する必要はない。In addition, at the operating temperature of conventional equipment, R2
Since it has a refrigerant characteristic equal to or higher than that of R2,
A coefficient of performance and a refrigerating effect higher than 2 can be expected, and the existing equipment can be used as it is as an alternative to R22, and there is no need to newly replace the equipment.
【００３７】更に、第２の発明によれば、蒸発器または
凝縮器を通過する前後の作動流体の温度差が５℃以下と
なるので、熱交換効率の低下や蒸発器への霜の付着など
を引き起こす虞れがない。Furthermore, according to the second aspect of the invention, the temperature difference between the working fluid before and after passing through the evaporator or the condenser is 5 ° C. or less, so that the heat exchange efficiency is reduced and frost adheres to the evaporator. There is no danger of causing.
【図１】本発明の作動流体を試験したヒートポンプ装置
の構成図である。FIG. 1 is a configuration diagram of a heat pump device tested with a working fluid of the present invention.
【図２】作動流体の冷凍サイクル内におけるモリエル線
図である。FIG. 2 is a Mollier diagram in the refrigeration cycle of the working fluid.
【図３】本発明の作動流体の成績係数（ＣＯＰ）を示し
た図である。FIG. 3 is a diagram showing a coefficient of performance (COP) of the working fluid of the present invention.
【図４】本発明の作動流体の冷凍効果（Ｈi）を示した
図である。FIG. 4 is a diagram showing a refrigerating effect (Hi) of the working fluid of the present invention.
【図５】本発明の作動流体の吐出圧力（Ｐcond）を示し
た図である。FIG. 5 is a diagram showing a discharge pressure (Pcond) of a working fluid of the present invention.
【図６】本発明の作動流体の蒸発前後の冷媒温度差（Ｔ
v）を示した図である。FIG. 6 shows a refrigerant temperature difference (T before and after evaporation of the working fluid of the present invention).
It is the figure which showed v).
【図７】本発明の作動流体の凝縮前後の冷媒温度差（Ｔ
c）を示した図である。FIG. 7: Refrigerant temperature difference before and after condensation of the working fluid of the present invention (T
It is the figure which showed c).
【図８】本発明の作動流体の望ましい成分比の範囲を示
した図である。FIG. 8 is a diagram showing a desirable component ratio range of the working fluid of the present invention.
１ 圧縮機 ２ 凝縮器 ３ 減圧器 ４ 蒸発器 1 Compressor 2 Condenser 3 Decompressor 4 Evaporator
Claims (2)
フルオロシクロブタン２５重量％以下、残部が1,1,1,2-
テトラフルオロエタンであって、 オクタフルオロシクロブタン及びジフルオロメタンの成
分比が添付の図８の点線で示す点Ａ（ 0,40）、点Ｂ（2
5,25）、点Ｃ（15,15）、点Ｄ（10,10）及び点Ｅ（ 0,1
5）で囲まれる範囲であり、少なくとも前記三種の成分
を含む作動流体。1. Difluoromethane 40% by weight or less, octafluorocyclobutane 25% by weight or less, and the balance 1,1,1,2-
In the case of tetrafluoroethane, the component ratios of octafluorocyclobutane and difluoromethane are points A (0,40) and B (2
5,25), point C (15,15), point D (10,10) and point E (0,1)
A working fluid that is surrounded by 5) and contains at least the above-mentioned three components.
フルオロシクロブタン１５重量％以下、残部が1,1,1,2-
テトラフルオロエタンであって、 オクタフルオロシクロブタン及びジフルオロメタンの成
分比が添付の図８の実線で示す点Ｃ（15,15）、点Ｄ（1
0,10）、点Ｅ（ 0,15）及び点Ｆ（ 0,20）で囲まれる範
囲であり、少なくとも前記三種の成分を含む作動流体。2. Difluoromethane 20% by weight or less, octafluorocyclobutane 15% by weight or less, and the balance 1,1,1,2-
In tetrafluoroethane, the component ratios of octafluorocyclobutane and difluoromethane are points C (15,15) and D (1
0,10), a point E (0,15) and a point F (0,20), and a working fluid containing at least the above-mentioned three components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6267611A JPH08127767A (en) | 1994-10-31 | 1994-10-31 | Working fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6267611A JPH08127767A (en) | 1994-10-31 | 1994-10-31 | Working fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08127767A true JPH08127767A (en) | 1996-05-21 |
Family
ID=17447126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6267611A Pending JPH08127767A (en) | 1994-10-31 | 1994-10-31 | Working fluid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08127767A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997017414A1 (en) * | 1995-11-07 | 1997-05-15 | Star Refrigeration Limited | Centrifugal compression refrigerant composition |
| US6692653B2 (en) | 2001-02-16 | 2004-02-17 | Korea Institute Of Science And Technology | Refrigerant composition |
| US6776922B2 (en) | 2002-07-24 | 2004-08-17 | Korea Institute Of Science And Technology | Refrigerant composition comprising difluoromethane, 1,1,1-trifluoroethane and 1,1-difluoroethane |
| US6800216B2 (en) | 2002-07-24 | 2004-10-05 | Korea Institute Of Science And Technology | Refrigerant composition for replacing chlorodifluoromethane |
| US6841087B2 (en) | 2002-04-19 | 2005-01-11 | Korea Institute Of Science And Technology | Refrigerant composition comprising difluoromethane, 1,1,1-trifluoroethane and 1,1,1,2-tetrafluoroethane |
-
1994
- 1994-10-31 JP JP6267611A patent/JPH08127767A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997017414A1 (en) * | 1995-11-07 | 1997-05-15 | Star Refrigeration Limited | Centrifugal compression refrigerant composition |
| US6692653B2 (en) | 2001-02-16 | 2004-02-17 | Korea Institute Of Science And Technology | Refrigerant composition |
| US6841087B2 (en) | 2002-04-19 | 2005-01-11 | Korea Institute Of Science And Technology | Refrigerant composition comprising difluoromethane, 1,1,1-trifluoroethane and 1,1,1,2-tetrafluoroethane |
| US6776922B2 (en) | 2002-07-24 | 2004-08-17 | Korea Institute Of Science And Technology | Refrigerant composition comprising difluoromethane, 1,1,1-trifluoroethane and 1,1-difluoroethane |
| US6800216B2 (en) | 2002-07-24 | 2004-10-05 | Korea Institute Of Science And Technology | Refrigerant composition for replacing chlorodifluoromethane |
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