JPH0660307B2 - Refrigerant composition - Google Patents
Refrigerant compositionInfo
- Publication number
- JPH0660307B2 JPH0660307B2 JP2056029A JP5602990A JPH0660307B2 JP H0660307 B2 JPH0660307 B2 JP H0660307B2 JP 2056029 A JP2056029 A JP 2056029A JP 5602990 A JP5602990 A JP 5602990A JP H0660307 B2 JPH0660307 B2 JP H0660307B2
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- temperature
- oil
- pipe
- refrigeration cycle
- 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 - Fee Related
Links
- 239000003507 refrigerant Substances 0.000 title claims description 28
- 239000000203 mixture Substances 0.000 title claims description 17
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 35
- XPDWGBQVDMORPB-UHFFFAOYSA-N Fluoroform Chemical compound FC(F)F XPDWGBQVDMORPB-UHFFFAOYSA-N 0.000 claims description 10
- UMNKXPULIDJLSU-UHFFFAOYSA-N dichlorofluoromethane Chemical compound FC(Cl)Cl UMNKXPULIDJLSU-UHFFFAOYSA-N 0.000 claims description 5
- 229940099364 dichlorofluoromethane Drugs 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 description 28
- 239000003921 oil Substances 0.000 description 22
- 238000009835 boiling Methods 0.000 description 6
- 239000010725 compressor oil Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 3
- NPNPZTNLOVBDOC-UHFFFAOYSA-N 1,1-difluoroethane Chemical compound CC(F)F NPNPZTNLOVBDOC-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 125000004773 chlorofluoromethyl group Chemical group [H]C(F)(Cl)* 0.000 description 1
- AFYPFACVUDMOHA-UHFFFAOYSA-N chlorotrifluoromethane Chemical compound FC(F)(F)Cl AFYPFACVUDMOHA-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010726 refrigerant oil Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Lubricants (AREA)
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、特に二元冷凍装置の低温側冷凍サイ
クルに有効であり、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 is a refrigerating composition, particularly a refrigerating composition which is effective for a refrigerating cycle on a low temperature side of a dual refrigerating apparatus and which has no risk of destroying an ozone layer. Regarding
（ロ）従来の技術 従来のこの種二元冷凍装置は、例えば特開昭５４−２１
６５８号公報に示されている。当該従来技術に示された
構成は低温側冷凍サイクルの蒸発器において−８０℃程
の超低温を得るためのもので、高温側冷凍サイクルの冷
媒としてＲ５００（Ｒ１２（ジクロロフルオロメタン）
とＲ１５２ａ（１，１−ジフルオロエタン）との共沸混
合物）を、また、低温側冷凍サイクルの冷媒としてＲ５
０３（Ｒ１３（クロロトリフルオロメタン）とＲ２３
（トリフルオロメタン）との共沸混合物）を用いてい
る。Ｒ５００の沸点は大気圧（１．０３３kg／cm2ａｂ
ｓ）で−３３．４５℃であり、Ｒ５０３の沸点は大気圧
で−８８．６５℃である。(B) Conventional Technology A conventional binary refrigeration system of this type is disclosed in, for example, Japanese Patent Laid-Open No. 54-21.
658. The configuration shown in the prior art is for obtaining an ultra-low temperature of about -80 ° C in the evaporator of the low temperature side refrigeration cycle, and R500 (R12 (dichlorofluoromethane) is used as the refrigerant for the high temperature side refrigeration cycle.
And R152a (1,1-difluoroethane) as an azeotropic mixture), and R5 as a refrigerant for the low temperature side refrigeration cycle.
03 (R13 (chlorotrifluoromethane) and R23
(Azeotrope with (trifluoromethane)) is used. The boiling point of R500 is atmospheric pressure (1.033 kg / cm 2 ab
s) is -33.45 ° C, and the boiling point of R503 is -88.65 ° C at atmospheric pressure.
上記Ｒ１２及びＲ１３は圧縮機のオイルと相溶性がよ
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。The above R12 and R13 have good compatibility with the oil of the compressor and also play a role of returning the oil in the refrigerant circuit to the compressor.
（ハ）発明が解決しようとする課題 然し乍ら上記低温側冷凍サイクルに封入されるＲ５０３
はその中のＲ１３はオゾン層を破壊する恐れがあり、使
用ができなくなってきた。(C) Problems to be Solved by the Invention However, R503 enclosed in the above low temperature side refrigeration cycle
Since R13 in it has a risk of destroying the ozone layer, it cannot be used.
その為、Ｒ５０３に代えてＲ２３のみを低温側冷凍サイ
クルに用いると、Ｒ２３は圧縮機オイルとの相溶性が悪
いので、冷凍サイクル中のオイルが圧縮機に戻らなくな
り、冷凍サイクルの配管内壁面に残留して冷媒流通路を
狭めるので、冷媒の循環量も減り、更に、配管の熱交換
効率も悪化するので冷却能力が著しく低下する問題があ
る。Therefore, if only R23 is used in the low temperature side refrigeration cycle in place of R503, R23 has poor compatibility with the compressor oil, so that the oil in the refrigeration cycle does not return to the compressor, and the internal wall surface of the pipe of the refrigeration cycle Since the refrigerant flow passage remains and narrows the refrigerant flow passage, the circulation amount of the refrigerant is reduced, and further, the heat exchange efficiency of the pipe is deteriorated, so that there is a problem that the cooling capacity is significantly lowered.
本発明は、係る課題を解決することを目的とする。The present invention aims to solve such problems.
（ニ）課題を解決するための手段 請求項１の発明は、トリフルオロメタン（Ｒ２３、ＣＨ
Ｆ3）及びｎ−ペンタン（Ｃ5Ｈ12）から冷媒組成物を構
成したものである。(D) Means for Solving the Problems The invention of claim 1 provides trifluoromethane (R23, CH
F 3) and is obtained by constituting the refrigerant composition from n- pentane (C 5 H 12).
更に請求項１の発明においてｎ−ペンタン（Ｃ5Ｈ12）
を１３重量％以上封入したものである。Further, in the invention of claim 1, n-pentane (C 5 H 12 )
Is 13% by weight or more.
また、請求項３の発明は、トリフルオロメタン（Ｒ２
３、ＣＨＦ3）及びジクロロモノフルオロメタン（Ｒ２
１、ＣＨＣｌ2Ｆ）から冷媒組成物を構成したものであ
る。The invention of claim 3 is the trifluoromethane (R2
3, CHF 3 ) and dichloromonofluoromethane (R2
1, CHCl 2 F) to form a refrigerant composition.
更に請求項２の発明においてジクロロモノフルオロメタ
ン（Ｒ２１、ＣＨＣｌ2Ｆ）を２８重量％以上封入した
ものである。Further, in the invention of claim 2, dichloromonofluoromethane (R21, CHCl 2 F) is enclosed in an amount of 28% by weight or more.
（ホ）作用 ｎ−ペンタン及びＲ２１はオゾン層を破壊する危険性が
なく、その沸点はそれぞれ大気圧において＋３６．０７
℃及び＋８．９５℃である。ｎ−ペンタン及びＲ２１は
圧縮機オイルとの相溶性が非常に良好であるため冷媒回
路中のオイルを、それに溶け込ませた状態で圧縮機に帰
還せしめ、特にＲ２１は圧縮機内で蒸発して圧縮機を冷
却する働きをする。(E) Action n-Pentane and R21 have no risk of destroying the ozone layer, and their boiling points are +36.07 at atmospheric pressure.
And + 8.95 ° C. Since n-pentane and R21 have very good compatibility with the compressor oil, the oil in the refrigerant circuit is returned to the compressor in a state of being dissolved therein, and especially R21 evaporates in the compressor and is compressed. Acts to cool the.
更に、出願人は鋭意研究の結果、オイル戻りが良好とな
る混合比を、ｎ−ペンタンの場合は全体の１３重量％以
上、Ｒ２１の場合は２８重量％以上であることを見出し
た。Further, as a result of diligent research, the applicant has found that the mixing ratio at which the oil return is good is 13% by weight or more in the case of n-pentane and 28% by weight or more in the case of R21.
（ヘ）実施例 次に図面において実施例を説明する。第１図は本発明の
冷媒組成物を使用する二次冷凍装置の冷媒回路図を示し
ている。Ｓ１は高温側冷凍サイクルを、また、Ｓ２は低
温側冷凍サイクルを示している。(F) Example Next, an example will be described with reference to the drawings. FIG. 1 shows a refrigerant circuit diagram of a secondary refrigeration system using the refrigerant composition of the present invention. S1 indicates a high temperature side refrigeration cycle, and S2 indicates a low temperature side refrigeration cycle.
高温側冷凍サイクルＳ１を構成する圧縮機１の吐出側配
管２は補助凝縮器３に接続され、補助凝縮器３は圧縮機
１のオイルクーラー４、補助凝縮器５、低温側冷凍サイ
クルＳ２を構成する圧縮機６のオイルクーラー７、凝縮
器８、乾燥器９、キャピラリチューブ１０を順次経て、
カスケードコンデンサ１１に接続されて受液器１２を経
て吸込側配管１３にて圧縮機１に接続されている。１４
は各凝縮器３、５及び８の冷却用ファンである。The discharge side pipe 2 of the compressor 1 constituting the high temperature side refrigeration cycle S1 is connected to the auxiliary condenser 3, and the auxiliary condenser 3 constitutes the oil cooler 4, the auxiliary condenser 5, and the low temperature side refrigeration cycle S2 of the compressor 1. After passing through the oil cooler 7, the condenser 8, the dryer 9, and the capillary tube 10 of the compressor 6,
It is connected to the cascade condenser 11, passes through the liquid receiver 12, and is connected to the compressor 1 through the suction side pipe 13. 14
Is a cooling fan for each condenser 3, 5 and 8.
低温側冷凍サイクルＳ２の圧縮機６の吐出側配管１５は
オイル分離器１６に接続され、そこで分離された圧縮機
オイルはリターン配管１７にて圧縮機６に帰還せられ
る。一方冷媒は配管１８に流入して吸込側熱交換器１９
と熱交換した後、ガスケードコンデンサ１１内の配管２
０内を通過して凝縮し、乾燥器２１、キャピラリチュー
ブ２２を経て入口管２３より蒸発器２４に流入し、出口
管２５より出て吸込側熱交換器１９内を経て圧縮機６の
吸込側配管２６より圧縮機６に帰還する構成である。２
７は膨張タンクでありキャピラリチューブ２８を介して
吸込側配管２６に接続されている。The discharge side pipe 15 of the compressor 6 of the low temperature side refrigeration cycle S2 is connected to an oil separator 16, and the compressor oil separated there is returned to the compressor 6 by a return pipe 17. On the other hand, the refrigerant flows into the pipe 18 and enters the suction side heat exchanger 19
After exchanging heat with the pipe 2 inside the gascade condenser 11
0 to condense, pass through the drier 21 and the capillary tube 22, flow into the evaporator 24 through the inlet pipe 23, exit through the outlet pipe 25, pass through the suction side heat exchanger 19, and the suction side of the compressor 6 It is configured to return to the compressor 6 from the pipe 26. Two
Reference numeral 7 denotes an expansion tank, which is connected to the suction side pipe 26 via a capillary tube 28.
高温側冷凍サイクルＳ１にはＲ２２（ジクロロジフルオ
ロメタン、ＣＨＣｌＦ2）が充填される。Ｒ２２の沸点
は大気圧において−４０．７５℃であり、このＲ２２が
各凝縮器３、５及び８にて凝縮し、キャピラリチューブ
１０にて減圧されてカスケードコンデンサ１１に流入し
てそこで蒸発することにより、カスケードコンデンサ１
１は−４０℃程となる。The high temperature side refrigeration cycle S1 is filled with R22 (dichlorodifluoromethane, CHClF 2 ). The boiling point of R22 is −40.75 ° C. at atmospheric pressure, and this R22 is condensed in each of the condensers 3, 5 and 8 and is decompressed in the capillary tube 10 to flow into the cascade condenser 11 and evaporate there. Allows a cascade capacitor 1
1 is about -40 ° C.
低温側冷凍サイクルＳ２にはＲ２３とｎ−ペンタンの冷
媒混合物が充填される。圧縮機６から吐出された冷媒及
び圧縮機オイルはオイル分離器１６に流入する。そこで
気体状の部分と液体状の部分とに分離され、オイルの大
部分は液体であるのでリターン配管１７より圧縮機６に
戻される。気体状の冷媒とオイルは配管１８を通り、吸
込側熱交換器１９と熱交換し、更にカスケードコンデン
サ１１にて高温側冷凍サイクルＳ１内の冷媒の蒸発によ
って冷却されて凝縮せられる。その後、キャピラリチュ
ーブ２２にて減圧された後、蒸発器２４に流入して蒸発
する。この蒸発器２４は図示しない冷凍庫の壁面に熱交
換関係に付設されて庫内を冷却する。The low temperature side refrigeration cycle S2 is filled with a refrigerant mixture of R23 and n-pentane. The refrigerant and compressor oil discharged from the compressor 6 flow into the oil separator 16. There, it is separated into a gas-like portion and a liquid-like portion, and since most of the oil is liquid, it is returned to the compressor 6 through the return pipe 17. The gaseous refrigerant and oil pass through the pipe 18 and exchange heat with the suction side heat exchanger 19, and are further cooled and condensed by the evaporation of the refrigerant in the high temperature side refrigeration cycle S1 by the cascade condenser 11. After that, the pressure is reduced by the capillary tube 22, and then flows into the evaporator 24 to be evaporated. The evaporator 24 is attached to the wall surface of a freezer (not shown) in a heat exchange relationship to cool the inside of the freezer.
この低温側冷凍サイクルＳ２中に充填される冷媒混合物
の混合比率と、低温側冷凍サイクルＳ２各部の温度及び
圧力との関係を第２図に示す。FIG. 2 shows the relationship between the mixing ratio of the refrigerant mixture filled in the low temperature side refrigeration cycle S2 and the temperature and pressure of each part of the low temperature side refrigeration cycle S2.
横軸はｎ−ペンタンの混合比率であり、縦軸は温度及び
圧力である。また、図中Ｌ１は圧縮機６の温度、Ｌ２は
吐出側配管１５の温度、Ｌ３は吸込側配管２６の温度を
示す。更に、Ｌ４は圧縮機６の吐出圧力、Ｌ５は蒸発器
２４の出口管２５の温度、Ｌ６は庫内温度、Ｌ７は蒸発
器２４の入口管２３の温度、Ｌ８は圧縮機６の吸込圧力
をそれぞれ示す。The horizontal axis represents the mixing ratio of n-pentane, and the vertical axis represents temperature and pressure. In the figure, L1 indicates the temperature of the compressor 6, L2 indicates the temperature of the discharge side pipe 15, and L3 indicates the temperature of the suction side pipe 26. Further, L4 is the discharge pressure of the compressor 6, L5 is the temperature of the outlet pipe 25 of the evaporator 24, L6 is the temperature inside the refrigerator, L7 is the temperature of the inlet pipe 23 of the evaporator 24, and L8 is the suction pressure of the compressor 6. Shown respectively.
ｎ−ペンタンの混合比率を低下させて行った場合、１３
重量％付近を境として吐出側配管１５の温度Ｌ２が低下
し、庫内温度Ｌ６は上昇する。また、吸込側配管２６の
温度Ｌ３及び出口管２５の温度Ｌ５は上昇を続ける。こ
れはオイル分離機１６から配管１８に流入した圧縮機６
のオイルが戻らなくなった為である。即ち、オイルが冷
凍サイクル中に滞留すると配管内面に付着し、流通路の
断面積が減る。それによって冷媒の循環量が減少するの
で圧縮機６の仕事量が減って温度Ｌ２が低下する。一
方、配管の壁面にオイルが付着することが熱交換が悪化
し、庫内温度Ｌ６が上昇するからである。When the mixing ratio of n-pentane was decreased, it was 13
The temperature L2 of the discharge side pipe 15 decreases and the in-compartment temperature L6 rises when the vicinity of weight% is reached. Further, the temperature L3 of the suction side pipe 26 and the temperature L5 of the outlet pipe 25 continue to rise. This is the compressor 6 flowing from the oil separator 16 into the pipe 18.
This is because the oil has stopped returning. That is, when the oil stays in the refrigeration cycle, it adheres to the inner surface of the pipe and the cross-sectional area of the flow passage decreases. As a result, the circulation amount of the refrigerant is reduced, so that the work amount of the compressor 6 is reduced and the temperature L2 is lowered. On the other hand, if oil adheres to the wall surface of the pipe, heat exchange deteriorates and the internal temperature L6 rises.
従って、ｎ−ペンタンを１３重量％以上封入することに
よって低温側冷凍サイクルＳ２内に循環する圧縮機６の
オイルを、ｎ−ペンタンに溶け込ませた状態で圧縮機６
に良好に帰還させることができることが分かった。Therefore, by encapsulating 13% by weight or more of n-pentane, the oil of the compressor 6 circulating in the low temperature side refrigeration cycle S2 is melted in the n-pentane, and the compressor 6 is cooled.
It turned out that it can be returned to satisfactorily.
一方、ｎ−ペンタンの沸点は高い為、多過ぎれば今度は
蒸発温度が上昇してしまい、二元冷凍装置で必要とされ
る蒸発温度が得られなくなる。これは第２図でｎ−ペン
タンが１５重量％以上から庫内温度Ｌ６が徐々に上昇し
始めることからも分かる。On the other hand, since the boiling point of n-pentane is high, if it is too large, the evaporation temperature will rise and the evaporation temperature required by the binary refrigeration system will not be obtained. This can also be seen from FIG. 2 in which the temperature L6 in the refrigerator begins to gradually rise from 15 wt% or more of n-pentane.
そこで、理想的には混合比率をＲ２３が８６重量％、ｎ
−ペンタンが１４重量％とすることで、吸込圧力（Ｌ
９）が０．７ｋｇ／cm2ａｂｓで庫内温度（Ｌ６）−８
５℃程が得られた。これによって従来のＲ５０３を使用
していた場合と同等の超低温が得られ、且つ、オイル戻
しの問題も解決できた。Therefore, ideally, the mixing ratio of R23 is 86% by weight, n
-When the pentane content is 14% by weight, the suction pressure (L
9) is 0.7 kg / cm 2 abs and internal temperature (L6) -8
About 5 ° C was obtained. As a result, an ultra-low temperature equivalent to the case of using the conventional R503 was obtained, and the problem of oil return was solved.
次に、第３図にＲ２３とＲ２１の冷媒混合物を低温側冷
凍サイクルＳ２に封入した場合の混合比率と、低温側冷
凍サイクルＳ２各部の温度及び圧力との関係を示す。Next, FIG. 3 shows the relationship between the mixture ratio when the refrigerant mixture of R23 and R21 is enclosed in the low temperature side refrigeration cycle S2, and the temperature and pressure of each part of the low temperature side refrigeration cycle S2.
横軸はＲ２１の混合比率であり、縦軸は温度及び圧力で
ある。また、図中Ｌ１〜Ｌ９は第２図と同一部位の温度
或るいは圧力とする。The horizontal axis represents the mixing ratio of R21, and the vertical axis represents the temperature and pressure. Further, in the figure, L1 to L9 are the temperature or pressure of the same portion as in FIG.
Ｒ２１の混合比率を低下させて行った場合、２８重量％
付近を境として吐出側配管１５の温度Ｌ２及び吐出圧力
Ｌ４が低下し、庫内温度Ｌ６及び出口管２５の温度Ｌ５
は上昇する。また、吸込側配管２６の温度Ｌ３は上昇を
続ける。これはオイル分離機１６から配管１８に流入し
た圧縮機６のオイが前述同様に圧縮機６に戻らなくなっ
た為である。28% by weight when the mixing ratio of R21 is lowered
The temperature L2 and the discharge pressure L4 of the discharge side pipe 15 decrease at the boundary, and the inside temperature L6 and the temperature L5 of the outlet pipe 25 decrease.
Rises. Further, the temperature L3 of the suction side pipe 26 continues to rise. This is because the oil of the compressor 6 flowing from the oil separator 16 into the pipe 18 does not return to the compressor 6 as described above.
従って、Ｒ２１を２８重量％以上封入することによって
低温側冷凍サイクルＳ２内に循環する圧縮機６のオイル
を、Ｒ２１に溶け込ませた状態で圧縮機６に良好に帰還
させることができることが分かった。Therefore, it was found that by enclosing R21 at 28 wt% or more, the oil of the compressor 6 circulating in the low temperature side refrigeration cycle S2 can be favorably returned to the compressor 6 while being dissolved in R21.
一方Ｒ２１の沸点は高い為、多過ぎれば同様に蒸発温度
が上昇してしまい、二次冷凍装置で必要とされる蒸発温
度が得られなくなる。これは第３図でＲ２１が３０重量
％以上から庫内温度Ｌ６及び蒸発器２４の入口温度Ｌ７
が再び上昇し始めることからも分かる。On the other hand, since the boiling point of R21 is high, if it is too large, the evaporation temperature similarly rises, and the evaporation temperature required in the secondary refrigeration system cannot be obtained. This is shown in FIG. 3 when R21 is 30% by weight or more and the internal temperature L6 and the inlet temperature L7 of the evaporator 24 are L7.
It can be seen from the start of rising again.
そこで、理想的には混合比率をＲ２３が７１重量％、Ｒ
２１が２９重量％とすることで、吸込圧力（Ｌ８）が
０．７kg／cm2ａｂｓで庫内温度（Ｌ６）−８３℃程が
得られる。Therefore, ideally, the mixing ratio of R23 is 71% by weight, R23
When 21 is 29% by weight, a suction pressure (L8) of 0.7 kg / cm 2 abs and an internal temperature (L6) of -83 ° C can be obtained.
（ト）発明の効果 本発明によれば、ｎ−ペンタン及びＲ２１はオゾン層を
破壊する危険性がなく、更に、ｎ−ペンタン及びＲ２１
双方共、圧縮機オイルとの相溶性が非常に良好であるた
め冷媒回路中のオイルを、それに溶け込ませた状態で圧
縮機に帰還せしめることができる。従って、オイルが戻
らないことによって発生する冷媒の循環量も減少、配管
の熱交換効率の悪化による冷却能力の著しい低下も防止
できる。特にＲ２１は圧縮機内で蒸発して圧縮機を冷却
する働きもする。(G) Effect of the Invention According to the present invention, n-pentane and R21 have no risk of destroying the ozone layer, and further, n-pentane and R21.
Both of them have very good compatibility with the compressor oil, so that the oil in the refrigerant circuit can be fed back to the compressor in a state of being dissolved therein. Therefore, the circulation amount of the refrigerant generated due to the oil not returning can be reduced, and a significant decrease in the cooling capacity due to the deterioration of the heat exchange efficiency of the pipe can be prevented. In particular, R21 also functions to evaporate in the compressor and cool the compressor.
各図は実施例を示し、第１図は冷媒回路図、第２図はｎ
−ペンタンの混合比率と冷媒回路各部の温度及び圧力の
相関々係を示す図、第３図はＲ２１の混合比率と冷媒回
路各部の温度及び圧力の相関々係を示す図である。 Ｓ１…高温側冷凍サイクル、Ｓ２…低温側冷凍サイク
ル、１、６…圧縮機、１１…カスケードコンデンサ、２
４…蒸発器。Each drawing shows an embodiment, FIG. 1 is a refrigerant circuit diagram, and FIG. 2 is n.
FIG. 3 is a diagram showing the correlation between the mixture ratio of pentane and the temperature and pressure of each part of the refrigerant circuit, and FIG. 3 is a diagram showing the correlation between the mixture ratio of R21 and the temperature and pressure of each part of the refrigerant circuit. S1 ... High temperature side refrigeration cycle, S2 ... Low temperature side refrigeration cycle, 1, 6 ... Compressor, 11 ... Cascade condenser, 2
4 ... Evaporator.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 湯沢 治郎 大阪府守口市京阪本通２丁目18番地 三洋 電機株式会社内 (72)発明者 井上 勝彦 大阪府守口市京阪本通２丁目18番地 三洋 電機株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Jiro Yuzawa 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (72) Inventor Katsuhiko Inoue 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Denki Within the corporation
Claims (4)
成る冷媒組成物。1. A refrigerant composition comprising trifluoromethane and n-pentane.
とを特徴とする請求項１記載の冷媒組成物。2. The refrigerant composition according to claim 1, which contains 13% by weight or more of n-pentane.
オロメタンから成る冷媒組成物。3. A refrigerant composition comprising trifluoromethane and dichloromonofluoromethane.
以上封入したことを特徴とする請求項３記載の冷媒組成
物。4. 28% by weight of dichloromonofluoromethane
The refrigerant composition according to claim 3, which is encapsulated as described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2056029A JPH0660307B2 (en) | 1990-03-06 | 1990-03-06 | Refrigerant composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2056029A JPH0660307B2 (en) | 1990-03-06 | 1990-03-06 | Refrigerant composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03255189A JPH03255189A (en) | 1991-11-14 |
| JPH0660307B2 true JPH0660307B2 (en) | 1994-08-10 |
Family
ID=13015645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2056029A Expired - Fee Related JPH0660307B2 (en) | 1990-03-06 | 1990-03-06 | Refrigerant composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0660307B2 (en) |
-
1990
- 1990-03-06 JP JP2056029A patent/JPH0660307B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03255189A (en) | 1991-11-14 |
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