JPH04288451A - Fluorocarbon mixture refrigerant freezer - Google Patents
Fluorocarbon mixture refrigerant freezerInfo
- Publication number
- JPH04288451A JPH04288451A JP3052276A JP5227691A JPH04288451A JP H04288451 A JPH04288451 A JP H04288451A JP 3052276 A JP3052276 A JP 3052276A JP 5227691 A JP5227691 A JP 5227691A JP H04288451 A JPH04288451 A JP H04288451A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- fluorocarbon
- gas
- heat exchanger
- pressure
- 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 240
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 239000000203 mixture Substances 0.000 title abstract description 4
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000005057 refrigeration Methods 0.000 claims description 33
- 238000009835 boiling Methods 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 17
- 230000006837 decompression Effects 0.000 claims 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 abstract description 13
- 239000005437 stratosphere Substances 0.000 abstract description 3
- 230000008014 freezing Effects 0.000 abstract 3
- 238000007710 freezing Methods 0.000 abstract 3
- 238000007599 discharging Methods 0.000 abstract 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 18
- 238000010586 diagram Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 230000006378 damage Effects 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 3
- -1 R-12 Chemical compound 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、非共沸混合冷媒を用
いて低温を得るフロン系混合冷媒冷凍装置に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorocarbon mixed refrigerant refrigeration system which uses a non-azeotropic refrigerant mixture to obtain a low temperature.
【０００２】0002
【従来の技術】図１は例えば特開昭５４−１６１１４５
号公報に示された従来のフロン系混合冷媒冷凍装置を示
す冷媒回路図であり、図において、１は圧縮機、２は予
冷器、３は気液分離器、４は第２膨張弁、５は第１熱交
換器、６は第２熱交換器、７は第１膨張弁、８は蒸発器
である。また、この冷媒回路において、冷媒としてＲ−
１２フロン冷媒，Ｒ−１３フロン冷媒が用いられて、−
５０〜−７０℃の冷凍温度が得られる冷凍装置を構成し
ている。次に動作について説明する。圧縮機１から吐出
され高圧となった冷媒ガスは、予冷器２に入り、高沸点
成分すなわちＲ−１２フロン冷媒を比較的多く含む冷媒
が凝縮され、気液分離器３で気液に分離される。このう
ち、凝縮液は第２膨張弁４で低圧に減圧されて低温とな
り、第２熱交換器６からの低圧戻り冷媒と合流し、第１
熱交換器５に流入する。一方、分離された低沸点成分す
なわちＲ−１３フロン冷媒を比較的多く含む未凝縮冷媒
ガスは、第１熱交換器５に入り、ここで第２膨張弁４で
低圧まで減圧して低温となった冷媒と、第２熱交換器６
からの低圧戻り冷媒とによって冷却され、全量または一
部が液化して第２熱交換器６に流入する。ここでは、蒸
発器８からの低圧戻り冷媒によってさらに冷却された後
に、第１膨張弁７で低圧に減圧されて、蒸発器８に流入
する。蒸発器８に流入した冷媒は、非冷却体を冷却し、
蒸発してガス化した後に、第２熱交換器６、第１熱交換
器５とを順次経由して圧縮機１に戻る。[Prior Art] FIG. 1 shows, for example, Japanese Patent Application Laid-Open No. 54-161145
1 is a refrigerant circuit diagram showing a conventional fluorocarbon-based mixed refrigerant refrigeration system disclosed in the publication, and in the figure, 1 is a compressor, 2 is a precooler, 3 is a gas-liquid separator, 4 is a second expansion valve, and 5 is a first heat exchanger, 6 is a second heat exchanger, 7 is a first expansion valve, and 8 is an evaporator. Moreover, in this refrigerant circuit, R-
12 fluorocarbon refrigerant, R-13 fluorocarbon refrigerant are used, -
This constitutes a refrigeration device that can obtain a refrigeration temperature of 50 to -70°C. Next, the operation will be explained. The high-pressure refrigerant gas discharged from the compressor 1 enters the precooler 2, where the refrigerant containing a relatively large amount of high boiling point components, that is, R-12 fluorocarbon refrigerant, is condensed and separated into gas and liquid by the gas-liquid separator 3. Ru. Among them, the condensed liquid is reduced in pressure to a low temperature by the second expansion valve 4, becomes low temperature, merges with the low pressure return refrigerant from the second heat exchanger 6, and flows into the first
It flows into the heat exchanger 5. On the other hand, the uncondensed refrigerant gas containing a relatively large amount of the separated low boiling point component, that is, R-13 fluorocarbon refrigerant, enters the first heat exchanger 5, where it is reduced to a low pressure by the second expansion valve 4 and becomes low temperature. refrigerant and the second heat exchanger 6
The refrigerant is cooled by the low-pressure return refrigerant from the refrigerant, and all or part of the refrigerant is liquefied and flows into the second heat exchanger 6. Here, after being further cooled by the low-pressure return refrigerant from the evaporator 8 , it is reduced in pressure to a low pressure by the first expansion valve 7 and flows into the evaporator 8 . The refrigerant flowing into the evaporator 8 cools the non-cooled body,
After being evaporated and gasified, it returns to the compressor 1 via the second heat exchanger 6 and the first heat exchanger 5 in this order.
【０００３】0003
【発明が解決しようとする課題】従来のフロン系混合冷
媒冷凍装置は、以上のように構成されているので、Ｒ−
１２フロン冷媒やＲ−１３フロン冷媒を使用することに
より、冷媒充填時や修理時に大気中に漏れることによっ
て、地球の成層圏のオゾンを破壊するなどの問題点があ
った。また、この装置の運転を停止した際に、冷凍サイ
クル内の圧力上昇を招いたり、運転中に圧縮機における
冷媒の吐出温度が上昇するなどの課題があった。[Problems to be Solved by the Invention] Since the conventional fluorocarbon mixed refrigerant refrigeration system is constructed as described above, the R-
The use of CFC 12 refrigerant and R-13 CFC refrigerant has caused problems such as the ozone in the earth's stratosphere being destroyed by the refrigerant leaking into the atmosphere during refrigerant filling or repair. Further, when the device stops operating, the pressure within the refrigeration cycle increases, and the discharge temperature of the refrigerant from the compressor increases during operation.
【０００４】この請求項１の発明は上記のような課題を
解消するためになされたものであり、オゾンの破壊程度
がＲ−１２フロン冷媒やＲ−１３フロン冷媒より少ない
冷媒を使用することによって、オゾンの破壊を低減でき
るとともに、従来と同程度の冷却効果が得られるフロン
系混合冷媒冷凍装置を得ることを目的とする。[0004] The invention of claim 1 has been made to solve the above-mentioned problem, and by using a refrigerant that causes less ozone destruction than R-12 fluorocarbon refrigerant and R-13 fluorocarbon refrigerant. The object of the present invention is to obtain a fluorocarbon-based mixed refrigerant refrigeration system that can reduce ozone destruction and provide a cooling effect comparable to that of conventional systems.
【０００５】また、この請求項２の発明はオゾンの破壊
程度がＲ−１２フロン冷媒やＲ−１３フロン冷媒より少
ない冷媒を使用することによって、オゾンの破壊を低減
できるとともに、装置停止時の圧力上昇を低く抑えるこ
とができるフロン系混合冷媒冷凍装置を得ることを目的
とする。[0005] Furthermore, the invention of claim 2 can reduce ozone destruction by using a refrigerant whose degree of ozone destruction is lower than that of R-12 fluorocarbon refrigerant and R-13 fluorocarbon refrigerant, and also reduce the pressure when the equipment is stopped. The purpose of the present invention is to obtain a fluorocarbon-based mixed refrigerant refrigeration system that can suppress the rise in temperature to a low level.
【０００６】さらに、この請求項３の発明はオゾンの破
壊程度がＲ−１２フロン冷媒やＲ−１３フロン冷媒より
少ない冷媒を充填することによって、オゾンの破壊を低
減できるとともに、ポリトロープ指数の小さい冷媒を充
填することにより、圧縮機の吐出温度を低下させ、従来
と同程度の冷却効果を得ることができるフロン系混合冷
媒冷凍装置を得ることを目的とする。Furthermore, the invention of claim 3 can reduce ozone destruction by filling a refrigerant with a lower degree of ozone destruction than R-12 fluorocarbon refrigerant and R-13 fluorocarbon refrigerant. The purpose of the present invention is to provide a fluorocarbon-based mixed refrigerant refrigeration system that can lower the discharge temperature of the compressor and obtain a cooling effect comparable to that of conventional fluorocarbons.
【０００７】[0007]
【課題を解決するための手段】この請求項１の発明は、
冷凍サイクルで用いる非共沸混合冷媒を、少くともＲ−
２１フロン冷媒およびＲ−１１６フロン冷媒を含むもの
としたものである。[Means for solving the problem] The invention of claim 1 is as follows:
The non-azeotropic mixed refrigerant used in the refrigeration cycle is at least R-
21 Freon refrigerant and R-116 Freon refrigerant.
【０００８】また、この請求項２の発明は、冷凍サイク
ルで用いる非共沸混合冷媒を、少くともＲ−２１フロン
冷媒，Ｒ−１３４ａフロン冷媒およびＲ−２３フロン冷
媒を含むものとしたものである。[0008] Furthermore, the invention of claim 2 is such that the non-azeotropic mixed refrigerant used in the refrigeration cycle contains at least R-21 fluorocarbon refrigerant, R-134a fluorocarbon refrigerant and R-23 fluorocarbon refrigerant. be.
【０００９】さらに、この請求項３の発明は、冷凍サイ
クルで用いる非共沸混合冷媒を、少くともＲ−２１フロ
ン冷媒およびＲ−２３フロン冷媒を含むもの、またはＲ
−２１フロン冷媒，Ｒ−１１６フロン冷媒およびＲ−２
３フロン冷媒を含むものとしたものである。Furthermore, the invention of claim 3 provides that the non-azeotropic mixed refrigerant used in the refrigeration cycle contains at least R-21 fluorocarbon refrigerant and R-23 fluorocarbon refrigerant, or R-23 fluorocarbon refrigerant.
-21 Freon refrigerant, R-116 Freon refrigerant and R-2
It contains 3 fluorocarbon refrigerant.
【００１０】0010
【作用】この請求項１の発明におけるフロン系混合冷媒
冷凍装置は、充填される２種類以上の非共沸混合冷媒ガ
スのうち、高沸点の冷媒Ｒ−２１を凝縮させた後、減圧
して低温とし、Ｒ−２１フロン冷媒の次に沸点の高いＲ
−１１６フロン冷媒を冷却し凝縮させる。そして、凝縮
したＲ−１１６フロン冷媒を減圧して低温とし、次に沸
点の高い冷媒を凝縮させるという動作を順次くり返し、
最後に最も沸点の低い冷媒を凝縮した後に、蒸発器で蒸
発させて低温を得る。[Operation] The fluorocarbon mixed refrigerant refrigeration system according to the invention of claim 1 condenses the high boiling point refrigerant R-21 among the two or more types of non-azeotropic mixed refrigerant gases to be filled, and then reduces the pressure. R has a low temperature and has the second highest boiling point after R-21 Freon refrigerant.
- Cools and condenses 116 Freon refrigerant. Then, the condensed R-116 fluorocarbon refrigerant is depressurized to a low temperature, and then the refrigerant with a high boiling point is condensed, which is repeated in sequence.
Finally, the refrigerant with the lowest boiling point is condensed and then evaporated in an evaporator to obtain a low temperature.
【００１１】また、この請求項２の発明におけるフロン
系混合冷媒冷凍装置は、充填される２種類以上の非共沸
混合冷媒のうち、高沸点の冷媒Ｒ−２１を凝縮させた後
、減圧して低温とし、Ｒ−２１フロン冷媒の次に沸点の
高いＲ−１３４ａフロン冷媒を冷却し凝縮させる。そし
て、Ｒ−１３４ａフロン冷媒を減圧して低温とし、Ｒ−
１３４ａフロン冷媒の次に沸点の高いＲ−２３フロン冷
媒を冷却し凝縮させる。そして、さらに凝縮したＲ−２
３フロン冷媒を減圧して低温とし、次に沸点の低い冷媒
を凝縮させるという動作を順次くり返し、最後に最も沸
点の低い冷媒を凝縮した後に、蒸発器で蒸発させて低温
を得る。[0011] Furthermore, the fluorocarbon mixed refrigerant refrigeration apparatus according to the invention of claim 2 condenses the high boiling point refrigerant R-21 among the two or more types of non-azeotropic mixed refrigerants to be filled, and then reduces the pressure. The R-134a Freon refrigerant, which has the second highest boiling point after the R-21 Freon refrigerant, is cooled and condensed. Then, the pressure of the R-134a Freon refrigerant is reduced to a low temperature, and the R-134a refrigerant is
The R-23 Freon refrigerant, which has the second highest boiling point after the 134a Freon refrigerant, is cooled and condensed. And further condensed R-2
The operation of reducing the pressure of the 3 fluorocarbon refrigerant to a low temperature, then condensing the refrigerant with the lowest boiling point is repeated in sequence, and finally, after condensing the refrigerant with the lowest boiling point, it is evaporated in an evaporator to obtain a low temperature.
【００１２】さらに、この請求項３の発明におけるフロ
ン系混合冷媒冷凍装置は、高沸点の冷媒Ｒ−２１を凝縮
させた後、減圧して低温とし、Ｒ−２１フロン冷媒の次
に沸点の高いＲ−２３フロン冷媒のみ、または、Ｒ−１
１６フロン冷媒とＲ−２３フロン冷媒とを冷却し凝縮さ
せる。そして、凝縮したＲ−１１６フロン冷媒とＲ−２
３フロン冷媒を減圧して低温とし、次に沸点の高い冷媒
を凝縮させるという動作を順次くり返し、最後に最も沸
点の低い冷媒を凝縮した後に、蒸発器で蒸発させて低温
を得る。Furthermore, the fluorocarbon mixed refrigerant refrigeration apparatus according to the invention of claim 3 condenses the high boiling point refrigerant R-21 and then reduces the pressure to a low temperature. R-23 Freon refrigerant only or R-1
The 16 fluorocarbon refrigerant and the R-23 fluorocarbon refrigerant are cooled and condensed. Then, condensed R-116 Freon refrigerant and R-2
The operation of reducing the pressure of the 3 fluorocarbon refrigerant to a low temperature, then condensing the refrigerant with a high boiling point is repeated in sequence, and finally, after condensing the refrigerant with the lowest boiling point, it is evaporated in an evaporator to obtain a low temperature.
【００１３】[0013]
【実施例】以下、この発明の一実施例を図について説明
する。ここで、フロン系混合冷媒冷凍装置の構成および
動作は基本的に従来と同一であり、ここではその重複す
る説明を省略する。図２は圧力と冷媒の飽和温度との関
係を示す特性図であり、これからＲ−１３フロン冷媒と
Ｒ−１１６フロン冷媒とは、ほぼ同じ特性であることが
分かる。従って、Ｒ−１３フロン冷媒の代替冷媒として
Ｒ−１１６フロン冷媒を使用することができる。ここで
、Ｒ−２１フロン冷媒はＲ−１２フロン冷媒に比べ、圧
力に対する飽和温度が高くなるが、動作圧力（高圧）を
１５−２５ｋｇ／ｃｍ２程度としてＲ−１１６フロン冷
媒の凝縮温度を高めとすることにより、Ｒ−２１フロン
冷媒で冷却することができ、Ｒ−１２フロン冷媒の代替
冷媒としてＲ−２１フロン冷媒を使用することができる
。なお、上記実施例ではフロン系混合冷媒冷凍装置に充
填されるＲ−１２，Ｒ−１３フロン冷媒の代替冷媒とし
てＲ−２１フロン冷媒およびＲ−１１６フロン冷媒のみ
を使用する場合を説明したが、これらにＲ−１２と同様
にオゾンを破壊するＲ−１１４フロン冷媒やＲ−１３を
含むフロン冷媒を使用してもよく、Ｒ−１１４フロン冷
媒の代替としてＲ−２１フロン冷媒を使用できることか
らＲ−１２，Ｒ−１３，Ｒ−１１４の各フロン冷媒を含
む２種類以上のフロン冷媒を使用しても、上記実施例と
同様の効果が得られる。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Here, the configuration and operation of the fluorocarbon-based mixed refrigerant refrigeration system are basically the same as those of the conventional system, and redundant explanation thereof will be omitted here. FIG. 2 is a characteristic diagram showing the relationship between pressure and refrigerant saturation temperature, and from this it can be seen that R-13 Freon refrigerant and R-116 Freon refrigerant have almost the same characteristics. Therefore, R-116 fluorocarbon refrigerant can be used as an alternative refrigerant to R-13 fluorocarbon refrigerant. Here, R-21 Freon refrigerant has a higher saturation temperature with respect to pressure than R-12 Freon refrigerant, but the condensation temperature of R-116 Freon refrigerant can be raised by setting the operating pressure (high pressure) to about 15-25 kg/cm2. By doing so, it is possible to perform cooling with the R-21 fluorocarbon refrigerant, and the R-21 fluorocarbon refrigerant can be used as an alternative refrigerant to the R-12 fluorocarbon refrigerant. In addition, in the above embodiment, a case was explained in which only R-21 fluorocarbon refrigerant and R-116 fluorocarbon refrigerant were used as alternative refrigerants for R-12 and R-13 fluorocarbon refrigerants filled in a fluorocarbon mixed refrigerant refrigeration system. For these, R-114 CFC refrigerant, which destroys ozone like R-12, or CFC refrigerant containing R-13 may be used, and R-21 CFC refrigerant can be used as an alternative to R-114 CFC refrigerant. Even if two or more types of fluorocarbon refrigerants including fluorocarbon refrigerants -12, R-13, and R-114 are used, the same effects as in the above embodiment can be obtained.
【００１４】また、図３は請求項２の発明における冷媒
の圧力と飽和温度との関係を示す特性図であり、この図
から１３４ａフロン冷媒とＲ−１２フロン冷媒，Ｒ−１
３フロン冷媒とＲ−２３フロン冷媒とは、それぞれほぼ
同じ特性であることが分かる。従って、Ｒ−１２フロン
冷媒とＲ−１３フロン冷媒の代替冷媒として、１３４ａ
フロン冷媒とＲ−２３フロン冷媒を使用することができ
る。ここで、１３４ａフロン冷媒（テトラフルオロエタ
ン）はオゾンを破壊しない冷媒であり、この１３４ａフ
ロン冷媒とＲ−２３フロン冷媒に、さらにＲ−２１フロ
ン冷媒を充填することによって、Ｒ−２１フロン冷媒の
飽和圧力が１３４ａフロン冷媒やＲ−２３フロン冷媒に
比べ低いことから、装置の停止時の圧力上昇を低くする
ことができる。なお、上記実施例ではフロン系混合冷媒
冷凍装置に充填されるＲ−１２，Ｒ−１３フロン冷媒の
代替冷媒Ｒ−１３４ａ，Ｒ２３，Ｒ２１の各フロン冷媒
のみを使用する場合を説明したが、これらにＲ−１２，
Ｒ−１３フロン冷媒を含む２種類以上のフロン冷媒を使
用しても上記実施例と同様の効果を奏する。FIG. 3 is a characteristic diagram showing the relationship between refrigerant pressure and saturation temperature in the invention according to claim 2. From this diagram, it can be seen that 134a fluorocarbon refrigerant, R-12 fluorocarbon refrigerant, R-1 fluorocarbon refrigerant,
It can be seen that the 3 fluorocarbon refrigerant and the R-23 fluorocarbon refrigerant have almost the same characteristics. Therefore, as an alternative refrigerant for R-12 and R-13 fluorocarbon refrigerants, 134a
Freon refrigerants and R-23 Freon refrigerants can be used. Here, 134a fluorocarbon refrigerant (tetrafluoroethane) is a refrigerant that does not destroy ozone, and by filling the 134a fluorocarbon refrigerant and R-23 fluorocarbon refrigerant with R-21 fluorocarbon refrigerant, the R-21 fluorocarbon refrigerant can be Since the saturation pressure is lower than that of 134a fluorocarbon refrigerant and R-23 fluorocarbon refrigerant, the pressure rise when the device is stopped can be reduced. In addition, in the above embodiment, a case was explained in which only fluorocarbon refrigerants R-134a, R23, and R21, which are substitutes for R-12 and R-13 fluorocarbon refrigerants filled in a fluorocarbon mixed refrigerant refrigeration system, are used. R-12,
Even if two or more types of fluorocarbon refrigerants including R-13 fluorocarbon refrigerant are used, the same effects as in the above embodiments can be obtained.
【００１５】さらに、図４は請求項２の発明における冷
媒の圧力と飽和温度との関係を示す特性図であり、この
図から、Ｒ−１３フロン冷媒とＲ−１１６フロン冷媒，
Ｒ−２３フロン冷媒とは、ほぼ同じ特性であることから
、Ｒ−１３フロン冷媒の代替冷媒としてＲ−１１６フロ
ン冷媒とＲ−２３フロン冷媒を使用することができる。
また、吸入圧力１ｋｇ／ｃｍ２の飽和ガスを１５ｋｇ／
ｃｍ２および２０ｋｇ／ｃｍ２で圧縮した場合のガス温
度は、〔表１〕に示す通りである。従って、Ｒ−１１６
フロン冷媒は温度が著しく低いところから、Ｒ−１３フ
ロン冷媒の代替冷媒としてＲ−１１６フロン冷媒単体ま
たはＲ−１１６フロン冷媒とＲ−２３フロン冷媒とを混
合して用いることにより、圧縮機１の吐出温度を低くす
ることができ、この圧縮機１の潤滑用オイルの劣化を防
止することができる。Furthermore, FIG. 4 is a characteristic diagram showing the relationship between refrigerant pressure and saturation temperature in the invention of claim 2, and from this diagram, it can be seen that R-13 fluorocarbon refrigerant, R-116 fluorocarbon refrigerant,
Since R-23 Freon refrigerant has almost the same characteristics, R-116 Freon refrigerant and R-23 Freon refrigerant can be used as alternative refrigerants for R-13 Freon refrigerant. In addition, 15 kg/cm2 of saturated gas with a suction pressure of 1 kg/cm2 is
The gas temperatures when compressed at cm2 and 20 kg/cm2 are as shown in [Table 1]. Therefore, R-116
Since the temperature of fluorocarbon refrigerant is extremely low, by using R-116 fluorocarbon refrigerant alone or a mixture of R-116 fluorocarbon refrigerant and R-23 fluorocarbon refrigerant as an alternative refrigerant to R-13 fluorocarbon refrigerant, the compressor 1 can be improved. The discharge temperature can be lowered, and deterioration of the lubricating oil of the compressor 1 can be prevented.
【００１６】[0016]
【表１】[Table 1]
【００１７】Ｒ−２１フロン冷媒は、Ｒ−１２フロン冷
媒に比べ、圧力に対する飽和温度が高くなるが、動作圧
力（高圧）を１５−２５ｋｇ／ｃｍ２程度としてＲ−１
１６フロン冷媒やＲ−２３フロン冷媒の凝縮温度を高め
とすることにより、Ｒ−２１フロン冷媒で冷却すること
ができ、Ｒ−１２フロン冷媒の代替冷媒としてＲ−２１
フロン冷媒を使用することができる。以上のことから、
Ｒ−１２フロン冷媒とＲ−１３フロン冷媒の代替冷媒と
して、Ｒ−２１フロン冷媒およびＲ−２３フロン冷媒の
組み合わせやＲ−２１フロン冷媒，Ｒ−２３フロン冷媒
およびＲ−１１６フロン冷媒の組み合わせが可能である
ことがわかる。なお、上記実施例ではフロン系混合冷媒
冷凍装置に充填されるＲ−１２，Ｒ−１３フロン冷媒の
代替冷媒としてＲ−２１，Ｒ−２３，Ｒ−１１６のフロ
ン冷媒のみを使用する場合について説明したが、これら
にＲ−１２と同様のオゾンを破壊するＲ−１１４フロン
冷媒とＲ−１３フロン冷媒を含むものの代替として使用
してもよく、またＲ−１１４フロン冷媒の代替としてＲ
−２１が使用できることから、Ｒ−１２，Ｒ−１３，Ｒ
−１１４フロン冷媒を含む２種類以上のフロン冷媒の代
替として使用してもよく、上記実施例と同様の効果が得
られる。R-21 Freon refrigerant has a higher saturation temperature with respect to pressure than R-12 Freon refrigerant, but when the operating pressure (high pressure) is about 15-25 kg/cm2, R-1
By increasing the condensation temperature of 16 CFC refrigerant and R-23 CFC refrigerant, it is possible to cool with R-21 CFC refrigerant, and R-21 CFC refrigerant can be used as an alternative refrigerant to R-12 CFC refrigerant.
Freon refrigerant can be used. From the above,
As alternative refrigerants for R-12 Freon refrigerant and R-13 Freon refrigerant, combinations of R-21 Freon refrigerant and R-23 Freon refrigerant, and combinations of R-21 Freon refrigerant, R-23 Freon refrigerant and R-116 Freon refrigerant are available. It turns out that it is possible. In addition, in the above embodiment, a case is explained in which only R-21, R-23, and R-116 fluorocarbon refrigerants are used as alternative refrigerants for R-12 and R-13 fluorocarbon refrigerants filled in a fluorocarbon mixed refrigerant refrigeration system. However, it may be used as a substitute for R-114 CFC refrigerant and R-13 CFC refrigerant, which destroy ozone similar to R-12.
-21 can be used, R-12, R-13, R
It may be used as a substitute for two or more types of fluorocarbon refrigerants including -114 fluorocarbon refrigerant, and the same effects as in the above embodiments can be obtained.
【００１８】[0018]
【発明の効果】以上のように、この請求項１の発明によ
れば冷凍サイクルで用いる非共沸混合冷媒を、少くとも
Ｒ−２１フロン冷媒およびＲ−１１６フロン冷媒を含む
ものとしたので、かかる冷媒が充填作業時や系統の修理
時に大気中に漏れることがあっても、地球の成層圏オゾ
ンを破壊するのを抑制できるものが得られる効果がある
。As described above, according to the invention of claim 1, since the non-azeotropic mixed refrigerant used in the refrigeration cycle contains at least R-21 fluorocarbon refrigerant and R-116 fluorocarbon refrigerant, Even if such a refrigerant leaks into the atmosphere during filling operations or system repairs, it has the effect of suppressing the destruction of the earth's stratospheric ozone.
【００１９】また、この請求項２の発明によれば、冷凍
サイクルで用いる非共沸混合冷媒を少くともＲ−２１フ
ロン冷媒，Ｒ−１３４ａフロン冷媒およびＲ−２３フロ
ン冷媒を含むものとしたので、上記効果に加えて、装置
の動作が停止した際における冷凍サイクル中の圧力上昇
を抑えることができるものが、得られる効果がある。Further, according to the invention of claim 2, the non-azeotropic mixed refrigerant used in the refrigeration cycle contains at least R-21 fluorocarbon refrigerant, R-134a fluorocarbon refrigerant and R-23 fluorocarbon refrigerant. In addition to the above-mentioned effects, there is an effect that can be obtained by suppressing the pressure rise in the refrigeration cycle when the operation of the device is stopped.
【００２０】さらに、この請求項３の発明によれば冷凍
サイクルで用いる非共沸混合冷媒を、少くともＲ−２１
フロン冷媒およびＲ−２３フロン冷媒を含むもの、また
はＲ−２１フロン冷媒，Ｒ−１１６フロン冷媒およびＲ
−２３フロン冷媒を含むものとしたので、地球の成層圏
のオゾンがそのフロン冷媒によって破壊するのを抑制で
きるとともに、圧縮機の吐出温度を低下できるものが得
られる効果がある。Furthermore, according to the invention of claim 3, the non-azeotropic mixed refrigerant used in the refrigeration cycle is at least R-21.
Those containing fluorocarbon refrigerant and R-23 fluorocarbon refrigerant, or R-21 fluorocarbon refrigerant, R-116 fluorocarbon refrigerant and R
Since it contains -23 fluorocarbon refrigerant, it is possible to suppress the ozone in the earth's stratosphere from being destroyed by the fluorocarbon refrigerant, and also to reduce the discharge temperature of the compressor.
【図１】この発明および従来のフロン系混合冷媒冷凍装
置を示すブロック図である。FIG. 1 is a block diagram showing the present invention and a conventional fluorocarbon mixed refrigerant refrigeration system.
【図２】請求項１の発明における冷媒の圧力と飽和温度
との関係を示す特性図である。FIG. 2 is a characteristic diagram showing the relationship between refrigerant pressure and saturation temperature in the invention of claim 1.
【図３】請求項２の発明における冷媒の圧力と飽和温度
との関係を示す特性図である。FIG. 3 is a characteristic diagram showing the relationship between refrigerant pressure and saturation temperature in the invention of claim 2.
【図４】請求項３の発明における冷媒の圧力と飽和温度
との関係を示す特性図である。FIG. 4 is a characteristic diagram showing the relationship between refrigerant pressure and saturation temperature in the invention according to claim 3.
１ 圧縮機 ２ 予冷器 ３ 気液分離器 ４ 第２膨張弁 ５ 第１熱交換器 ６ 第２熱交換器 ７ 第１膨張弁 ８ 蒸発器 なお、図中、同一符号は同一、又は相当部分を示す。 1 Compressor 2 Precooler 3 Gas-liquid separator 4 Second expansion valve 5 First heat exchanger 6 Second heat exchanger 7 First expansion valve 8 Evaporator In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (3)
非共沸混合冷媒のうち高沸点成分を多く含む冷媒を凝縮
する予冷器と、該予冷器を通過した冷媒を気液に分離す
る気液分離器と、該気液分離器で分離した低沸点成分を
多く含む冷媒ガスの少くとも一部を液化する熱交換器と
、該熱交換器からの冷媒を減圧する第１膨張弁と、該第
１膨張弁からの冷媒を蒸発させた後、上記熱交換器を介
して上記圧縮器へ戻す蒸発器と、上記気液分離器で分離
した高沸点成分を含む冷媒の凝縮液を減圧した後、上記
熱交換器を介して上記圧縮器へ戻す第２膨張弁とからな
る冷凍サイクルを有するフロン系混合冷媒冷凍装置にお
いて、上記非共沸混合冷媒を、少くともＲ−２１フロン
冷媒およびＲ−１１６フロン冷媒を含むものとしたこと
を特徴とするフロン系混合冷媒冷凍装置。[Claim 1] A precooler that condenses a high-pressure non-azeotropic mixed refrigerant of two or more types compressed by a compressor that contains a large amount of high boiling point components, and a precooler that separates the refrigerant that has passed through the precooler into gas and liquid. a gas-liquid separator; a heat exchanger that liquefies at least a portion of the refrigerant gas containing many low-boiling components separated by the gas-liquid separator; and a first expansion valve that reduces the pressure of the refrigerant from the heat exchanger. , an evaporator that evaporates the refrigerant from the first expansion valve and then returns it to the compressor via the heat exchanger; and a decompression of the refrigerant condensate containing high-boiling components separated by the gas-liquid separator. In a fluorocarbon mixed refrigerant refrigeration system having a refrigeration cycle comprising a second expansion valve that returns the non-azeotropic refrigerant to the compressor via the heat exchanger, the non-azeotropic refrigerant is mixed with at least R-21 fluorocarbon refrigerant and A fluorocarbon mixed refrigerant refrigeration system characterized by containing R-116 fluorocarbon refrigerant.
非共沸混合冷媒のうち高沸点成分を多く含む冷媒を凝縮
する予冷器と、該予冷器を通過した冷媒を気液に分離す
る気液分離器と、該気液分離器で分離した低沸点成分を
多く含む冷媒ガスの少くとも一部を液化する熱交換器と
、該熱交換器からの冷媒を減圧する第１膨張弁と、該第
１膨張弁からの冷媒を蒸発させた後、上記熱交換器を介
して上記圧縮器へ戻す蒸発器と、上記気液分離器で分離
した高沸点成分を含む冷媒の凝縮液を減圧した後、上記
熱交換器を介して上記圧縮器へ戻す第２膨張弁とからな
る冷凍サイクルを有するフロン系混合冷媒冷凍装置にお
いて、上記非共沸混合冷媒を、少くともＲ−２１フロン
冷媒，Ｒ−１３４ａフロン冷媒およびＲ−２３フロン冷
媒を含むものとしたことを特徴とするフロン系混合冷媒
冷凍装置。[Claim 2] A precooler that condenses a high-pressure non-azeotropic mixed refrigerant of two or more types compressed by a compressor that contains a large amount of high boiling point components, and a precooler that separates the refrigerant that has passed through the precooler into gas and liquid. a gas-liquid separator; a heat exchanger that liquefies at least a portion of the refrigerant gas containing many low-boiling components separated by the gas-liquid separator; and a first expansion valve that reduces the pressure of the refrigerant from the heat exchanger. , an evaporator that evaporates the refrigerant from the first expansion valve and then returns it to the compressor via the heat exchanger; and a decompression of the refrigerant condensate containing high-boiling components separated by the gas-liquid separator. In a fluorocarbon mixed refrigerant refrigeration system having a refrigeration cycle comprising a second expansion valve that returns the non-azeotropic refrigerant to the compressor via the heat exchanger, the non-azeotropic mixed refrigerant is at least R-21 fluorocarbon A fluorocarbon mixed refrigerant refrigeration system characterized by containing an R-134a fluorocarbon refrigerant and an R-23 fluorocarbon refrigerant.
非共沸混合冷媒のうち高沸点成分を多く含む冷媒を凝縮
する予冷器と、該予冷器を通過した冷媒を気液に分離す
る気液分離器と、該気液分離器で分離した低沸点成分を
多く含む冷媒ガスの少くとも一部を液化する熱交換器と
、該熱交換器からの冷媒を減圧する第１膨張弁と、該第
１膨張弁からの冷媒を蒸発させた後、上記熱交換器を介
して上記圧縮器へ戻す蒸発器と、上記気液分離器で分離
した高沸点成分を含む冷媒の凝縮液を減圧した後、上記
熱交換器を介して上記圧縮器へ戻す第２膨張弁とからな
る冷凍サイクルを有するフロン系混合冷媒冷凍装置にお
いて、上記非共沸混合冷媒を、少くともＲ−２１フロン
冷媒およびＲ−２３フロン冷媒を含むもの、またはＲ−
２１フロン冷媒，Ｒ−１１６フロン冷媒およびＲ−２３
フロン冷媒を含むものとしたことを特徴とするフロン系
混合冷媒冷凍装置。[Claim 3] A precooler that condenses a high-pressure non-azeotropic mixed refrigerant of two or more types compressed by a compressor that contains a large amount of high boiling point components, and a precooler that separates the refrigerant that has passed through the precooler into gas and liquid. a gas-liquid separator; a heat exchanger that liquefies at least a portion of the refrigerant gas containing many low-boiling components separated by the gas-liquid separator; and a first expansion valve that reduces the pressure of the refrigerant from the heat exchanger. , an evaporator that evaporates the refrigerant from the first expansion valve and then returns it to the compressor via the heat exchanger; and a decompression of the refrigerant condensate containing high-boiling components separated by the gas-liquid separator. In a fluorocarbon mixed refrigerant refrigeration system having a refrigeration cycle comprising a second expansion valve that returns the non-azeotropic refrigerant to the compressor via the heat exchanger, the non-azeotropic refrigerant is mixed with at least R-21 fluorocarbon refrigerant and Those containing R-23 Freon refrigerant, or R-
21 Freon refrigerant, R-116 Freon refrigerant and R-23
A fluorocarbon mixed refrigerant refrigeration device characterized by containing a fluorocarbon refrigerant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05227691A JP3174081B2 (en) | 1991-03-18 | 1991-03-18 | Non-azeotropic mixed refrigerant refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05227691A JP3174081B2 (en) | 1991-03-18 | 1991-03-18 | Non-azeotropic mixed refrigerant refrigeration system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04288451A true JPH04288451A (en) | 1992-10-13 |
| JP3174081B2 JP3174081B2 (en) | 2001-06-11 |
Family
ID=12910269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05227691A Expired - Fee Related JP3174081B2 (en) | 1991-03-18 | 1991-03-18 | Non-azeotropic mixed refrigerant refrigeration system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3174081B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0765924A2 (en) * | 1992-07-10 | 1997-04-02 | E.I. Du Pont De Nemours And Company | Azeotropic compositions of perfluoroethane and trifluoromethane, or oxide or nitrous oxide, or carbon dioxide, or fluoromethane |
| US5766503A (en) * | 1994-12-16 | 1998-06-16 | E. I. Du Pont De Nemours And Company | Refrigeration process using azeotropic compositions of perfluoroethane and trifluoromethane |
| DE10121544B4 (en) * | 2001-05-03 | 2007-08-16 | Axima Refrigeration Gmbh | Process for the liquefaction of a reactive gas |
| JP2010043752A (en) * | 2008-08-08 | 2010-02-25 | Sanyo Electric Co Ltd | Refrigerating device |
| US9335070B2 (en) | 2008-09-10 | 2016-05-10 | Panasonic Healthcare Holdings Co., Ltd. | Refrigerating apparatus |
| CN109341124A (en) * | 2018-11-14 | 2019-02-15 | 珠海格力电器股份有限公司 | A kind of mixed working fluid dual temperature circulatory system |
-
1991
- 1991-03-18 JP JP05227691A patent/JP3174081B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0765924A2 (en) * | 1992-07-10 | 1997-04-02 | E.I. Du Pont De Nemours And Company | Azeotropic compositions of perfluoroethane and trifluoromethane, or oxide or nitrous oxide, or carbon dioxide, or fluoromethane |
| EP0765924A3 (en) * | 1992-07-10 | 1997-05-14 | Du Pont | |
| US5766503A (en) * | 1994-12-16 | 1998-06-16 | E. I. Du Pont De Nemours And Company | Refrigeration process using azeotropic compositions of perfluoroethane and trifluoromethane |
| DE10121544B4 (en) * | 2001-05-03 | 2007-08-16 | Axima Refrigeration Gmbh | Process for the liquefaction of a reactive gas |
| JP2010043752A (en) * | 2008-08-08 | 2010-02-25 | Sanyo Electric Co Ltd | Refrigerating device |
| US9335070B2 (en) | 2008-09-10 | 2016-05-10 | Panasonic Healthcare Holdings Co., Ltd. | Refrigerating apparatus |
| US9360238B2 (en) | 2008-09-10 | 2016-06-07 | Panasonic Healthcare Holdings Co., Ltd. | Refrigerating apparatus |
| CN109341124A (en) * | 2018-11-14 | 2019-02-15 | 珠海格力电器股份有限公司 | A kind of mixed working fluid dual temperature circulatory system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3174081B2 (en) | 2001-06-11 |
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