JPH03260557A - Binary refrigerating plant - Google Patents
Binary refrigerating plantInfo
- Publication number
- JPH03260557A JPH03260557A JP2058647A JP5864790A JPH03260557A JP H03260557 A JPH03260557 A JP H03260557A JP 2058647 A JP2058647 A JP 2058647A JP 5864790 A JP5864790 A JP 5864790A JP H03260557 A JPH03260557 A JP H03260557A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- refrigeration cycle
- refrigerant
- temperature
- side refrigeration
- 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
- 238000005057 refrigeration Methods 0.000 claims abstract description 38
- 239000003507 refrigerant Substances 0.000 claims abstract description 21
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 claims abstract description 10
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims abstract description 10
- XPDWGBQVDMORPB-UHFFFAOYSA-N Fluoroform Chemical compound FC(F)F XPDWGBQVDMORPB-UHFFFAOYSA-N 0.000 claims description 8
- UMNKXPULIDJLSU-UHFFFAOYSA-N dichlorofluoromethane Chemical compound FC(Cl)Cl UMNKXPULIDJLSU-UHFFFAOYSA-N 0.000 claims description 3
- 229940099364 dichlorofluoromethane Drugs 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 13
- NPNPZTNLOVBDOC-UHFFFAOYSA-N 1,1-difluoroethane Chemical compound CC(F)F NPNPZTNLOVBDOC-UHFFFAOYSA-N 0.000 abstract description 12
- 239000010725 compressor oil Substances 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 2
- BHNZEZWIUMJCGF-UHFFFAOYSA-N 1-chloro-1,1-difluoroethane Chemical compound CC(F)(F)Cl BHNZEZWIUMJCGF-UHFFFAOYSA-N 0.000 abstract 1
- 101100203600 Caenorhabditis elegans sor-1 gene Proteins 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000009835 boiling Methods 0.000 description 9
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 4
- 229940051271 1,1-difluoroethane Drugs 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- -1 R23 Chemical compound 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- AFYPFACVUDMOHA-UHFFFAOYSA-N chlorotrifluoromethane Chemical compound FC(F)(F)Cl AFYPFACVUDMOHA-UHFFFAOYSA-N 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Compressor (AREA)
- Lubricants (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明はオゾン層を破壊する危険性のない冷媒にて溝底
した二元冷凍装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a trench-bottomed binary refrigeration system using a refrigerant that does not pose a risk of destroying the ozone layer.
（ロ）＃：米の技術
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
溝底は低温側冷凍サイクルの蒸発器において一８０℃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（ジクロロジフルオロメタン
）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Ｒ
５０３（Ｒ１３（クロロトリフルオロメタン）とＲ２３
（）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／ｃｍ”
ａｂｓ）で−３３，４５℃であり、Ｒ５０３の沸点は大
気圧で−８８，６５℃である。(b) #: US technology A conventional binary refrigeration system of this kind is, for example,
This is shown in Japanese Patent No. 658. The groove bottom shown in the prior art is for obtaining an extremely low temperature of about -80°C in the evaporator of the low temperature side refrigeration cycle, and uses R500 (R12 (dichlorodifluoromethane) and R152a (1 , 1-difluoroethane) as a refrigerant in the low-temperature side refrigeration cycle.
503 (R13 (chlorotrifluoromethane) and R23
(Azeotrope with ())) is used. The boiling point of R500 is atmospheric pressure (1,033 kg/cm"
abs) at -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良く
、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 the role of drawing the oil in the refrigerant circuit back 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Ｒ５００
及びＲ５０３はその中のＲ１２成るいはＲ１３が地球の
オゾン層を破壊する恐れがあり、使用できなくなってき
た。(c) Problems to be solved by the invention However, R500 is sealed in the above-mentioned low temperature side refrigeration cycle.
And R503 can no longer be used because R12 or R13 therein may destroy the earth's ozone layer.
その為、Ｒ５００に代えてオゾン層を破壊しないＲ２２
（クロロジフルオロメタン、沸点は大気圧で−４０，７
５℃）を高温側冷凍サイクルに用いる必要がある。また
、Ｒ２２は圧縮機オイルとの相溶性が悪く、高温側冷凍
サイクル中のオイル圧縮機に戻らなくなる危険性がある
。Therefore, instead of R500, R22 does not destroy the ozone layer.
(Chlorodifluoromethane, the boiling point is -40,7 at atmospheric pressure
5°C) must be used in the high temperature side refrigeration cycle. Furthermore, R22 has poor compatibility with compressor oil, and there is a risk that it will not return to the oil compressor during the high temperature side refrigeration cycle.
更に、Ｒ５０３に代えてＲ２３（沸点は大気圧で−８２
，０５℃）のみを低温側冷凍サイクルに用いると、Ｒ２
３は同様に圧縮機オイルとの相溶性が悪いので、低温側
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生じる。Furthermore, in place of R503, R23 (boiling point is -82 at atmospheric pressure)
, 05℃) is used in the low-temperature side refrigeration cycle, R2
3 similarly has poor compatibility with the compressor oil, so the oil in the low-temperature side refrigeration cycle does not return to the compressor and remains on the inner wall of the refrigeration cycle piping, narrowing the refrigerant flow path, reducing the amount of refrigerant circulation. In addition, the heat exchange efficiency of the pipes also deteriorates, resulting in a problem that the cooling capacity is significantly reduced.
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 this problem.
（ニ）課題を解決するための手段
請求項１の発明はカスケードコンデンサ１１にて高温側
冷凍サイクルＳ１と低温側冷凍サイクルＳ２とを連結し
て成る二元冷凍装置において、高温側冷凍サイクルＳｌ
にはクロロジフルオロメタン（Ｒ２２、（ＨＣＩＦｘ）
を含む冷媒を充填すると共に、低温側冷凍サイクルＳ２
にはトリフルオロメタン（Ｒ２３、ＣＨＦ、）及びｎ−
ペンタン（ＣｓＨ＋１）から成る混合冷媒若しくはトリ
フルオロメタン及びジクロロモノフルオロメタン（Ｒ２
１、ＣＨＣｌ、Ｆ）から成る混合冷媒を充填して二元冷
凍装置を構成したものである。(d) Means for Solving the Problems The invention of claim 1 provides a binary refrigeration system in which a high temperature side refrigeration cycle S1 and a low temperature side refrigeration cycle S2 are connected by a cascade condenser 11.
is chlorodifluoromethane (R22, (HCIFx)
At the same time, the low temperature side refrigeration cycle S2 is filled with a refrigerant containing
contains trifluoromethane (R23, CHF,) and n-
A mixed refrigerant consisting of pentane (CsH+1) or trifluoromethane and dichloromonofluoromethane (R2
1, CHCl, and F) to form a binary refrigeration system.
請求項２の発明は、更にこの高温側冷凍サイクルＳ１に
充填される冷媒にＲ２１を混入したものである。According to the second aspect of the invention, R21 is further mixed into the refrigerant charged into the high temperature side refrigeration cycle S1.
（ホ）作用
Ｒ２２、Ｒ２３、ｎ−ペンタン（沸点は大気圧で＋３６
．０７℃）及びＲ２１（沸点は大気圧で＋８．９５℃）
は、いずれもオゾン層を破壊する危険性がない。(E) Action R22, R23, n-pentane (boiling point is +36 at atmospheric pressure)
．． 07℃) and R21 (boiling point +8.95℃ at atmospheric pressure)
There is no risk of depleting the ozone layer.
また、高温側冷凍サイクルではカスケードコンデンサに
て一４０℃程の低温が得られる。In addition, in the high temperature side refrigeration cycle, a low temperature of about -40°C can be obtained using a cascade condenser.
更に、低温側冷凍サイクルの蒸発器では一８０℃以下の
超低温が得られる。Further, in the evaporator of the low temperature side refrigeration cycle, an extremely low temperature of -80°C or less can be obtained.
特に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両冷凍サイクル中のオイルを、
それに溶は込ませた状態で圧縮機に帰還せしめ、特にＲ
２１は圧縮機内で蒸発して圧縮機を冷却する働きをする
。In particular, n-pentane and R21 have very good compatibility with compressor oil, so the oil in both refrigeration cycles is
The melt is returned to the compressor in a state where it is filled with melt, especially R
21 evaporates within the compressor and serves to cool the compressor.
（へ）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
の二元冷凍装置の冷媒回路図を示している。Ｓｌ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) Embodiments Next, embodiments will be described with reference to the drawings. FIG. 1 shows a refrigerant circuit diagram of the dual refrigeration system of the present invention. Sl 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ｆＦ９、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。１
４は各凝縮器３．５及び８の冷却用ファンである。The discharge side piping 2 of the compressor 1 constituting the high temperature side refrigeration cycle S1 is connected to an auxiliary condenser 3, and the auxiliary condenser 3 is connected to the oil cooler 4 of the compressor 1, the auxiliary condenser 5. The oil passes through the oil cooler 7, condenser 8, dry fF9, and capillary tube 10 of the compressor 6 that constitutes the low-temperature side refrigeration cycle S2, is connected to the cascade condenser 11, passes through the liquid receiver 12, and is compressed in the suction side piping 13. Connected to machine 1. 1
4 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、カスケードコンデンサｌｌ内の配ｑｉ２
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′ｆ２６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 through a return pipe 17. On the other hand, the refrigerant flows into the pipe 18 and exchanges heat with the suction side heat exchanger 19, and then flows through the distribution qi2 in the cascade condenser ll.
0, condenses, passes through the dryer 21 and capillary tube 22, flows into the evaporator 24 from the inlet pipe 23, exits from the outlet pipe 25, passes through the suction side heat exchanger 19, and enters the suction side of the compressor 6. It is configured to return to the compressor 6 via a pipe 26. 2
Reference numeral 7 denotes an expansion tank, which is connected to the suction side pipe 'f26 via a capillary tube 28.
高温側冷凍サイクルＳ１には前述のＲ２２及びＲ２１の
混合冷媒）が充填される。この時、圧縮機ｌの吐出温度
が高い場合はＲ１５２ａ （１，１−ジフルオロエタン
、ＣＨ３ＣＨＦ２ 、沸点は大気圧で−２４，９５℃）
や、Ｒ１４２ｂ （１−りロワー１，１−ジフルオロエ
タン、Ｃ，ＣＩ Ｆ、Ｈｌ、沸点は大気圧で−９，７５
℃）をこれに混入しても良い。Ｒ１５２ａやＲ１４２ｂ
は圧縮機１の吸込温度が比較的高くても吐出温度が上が
らないのでこれを混入することで圧縮機１の吐出温度の
上昇を抑えられる。また、Ｒ２１は圧縮機１のオイルと
の相溶性が良いので、このオイルをＲ２１に溶は込ませ
た状態で圧縮機１に良好に帰還させることができ、それ
によって後述するのと同様の理由でカスケードコンデン
サ１１の温度上昇を防止でき、更に、オイル不足による
圧縮機ｌの焼き付きも防止できる。The high temperature side refrigeration cycle S1 is filled with the above-mentioned mixed refrigerant of R22 and R21. At this time, if the discharge temperature of compressor 1 is high, R152a (1,1-difluoroethane, CH3CHF2, boiling point is -24.95℃ at atmospheric pressure)
, R142b (1-dilower 1,1-difluoroethane, C, CI F, Hl, boiling point is -9,75 at atmospheric pressure
℃) may be mixed into this. R152a or R142b
Since the discharge temperature does not rise even if the suction temperature of the compressor 1 is relatively high, by mixing this, the rise in the discharge temperature of the compressor 1 can be suppressed. In addition, since R21 has good compatibility with the oil of the compressor 1, this oil can be returned to the compressor 1 in a state in which it is dissolved in R21, and for the same reason as described later. This can prevent the temperature of the cascade condenser 11 from rising, and can also prevent the compressor l from seizing up due to lack of oil.
然し乍ら、Ｒ２１、Ｒ１５２ａ及びＲ１４２ｂは沸点が
高いので、入れ過ぎれば今度はカスケードコンデンサ１
１にて所要の蒸発温度（−４０℃程）が得られなくなる
。However, R21, R152a, and R142b have high boiling points, so if you add too much, the cascade capacitor 1
1, the required evaporation temperature (about -40°C) cannot be obtained.
Claims (1)
温側冷凍サイクルとを連結して成る二元冷凍装置におい
て、前記高温側冷凍サイクルにはクロロジフルオロメタ
ンを含む冷媒を充填すると共に、前記低温側冷凍サイク
ルにはトリフルオロメタン及びｎ−ペンタンから成る混
合冷媒若しくはトリフルオロメタン及びジクロロモノフ
ルオロメタンから成る混合冷媒を充填したことを特徴と
する二元冷凍装置。 ２）高温側冷凍サイクルに充填される冷媒にジクロロモ
ノフルオロメタンを混入したことを特徴とする請求項１
記載の二元冷凍装置。[Claims] 1) In a binary refrigeration system in which a high temperature side refrigeration cycle and a low temperature side refrigeration cycle are connected by a cascade condenser, the high temperature side refrigeration cycle is filled with a refrigerant containing chlorodifluoromethane, and . A binary refrigeration system, wherein the low temperature side refrigeration cycle is filled with a mixed refrigerant of trifluoromethane and n-pentane or a mixed refrigerant of trifluoromethane and dichloromonofluoromethane. 2) Claim 1 characterized in that dichloromonofluoromethane is mixed into the refrigerant filled in the high temperature side refrigeration cycle.
Dual refrigeration equipment as described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2058647A JPH07104057B2 (en) | 1990-03-09 | 1990-03-09 | Dual freezer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2058647A JPH07104057B2 (en) | 1990-03-09 | 1990-03-09 | Dual freezer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03260557A true JPH03260557A (en) | 1991-11-20 |
| JPH07104057B2 JPH07104057B2 (en) | 1995-11-13 |
Family
ID=13090378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2058647A Expired - Fee Related JPH07104057B2 (en) | 1990-03-09 | 1990-03-09 | Dual freezer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07104057B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5265443A (en) * | 1991-05-28 | 1993-11-30 | Sanyo Electric Co., Ltd. | Refrigerating unit |
| WO2014050103A1 (en) | 2012-09-28 | 2014-04-03 | パナソニックヘルスケア株式会社 | Binary refrigeration device |
-
1990
- 1990-03-09 JP JP2058647A patent/JPH07104057B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5265443A (en) * | 1991-05-28 | 1993-11-30 | Sanyo Electric Co., Ltd. | Refrigerating unit |
| WO2014050103A1 (en) | 2012-09-28 | 2014-04-03 | パナソニックヘルスケア株式会社 | Binary refrigeration device |
| JP5941990B2 (en) * | 2012-09-28 | 2016-06-29 | パナソニックヘルスケアホールディングス株式会社 | Dual refrigeration equipment |
| US10704807B2 (en) | 2012-09-28 | 2020-07-07 | Phc Holdings Corporation | Binary refrigeration apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07104057B2 (en) | 1995-11-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |