JPH0432662A - Binary refrigeration arrangement - Google Patents
Binary refrigeration arrangementInfo
- Publication number
- JPH0432662A JPH0432662A JP13908390A JP13908390A JPH0432662A JP H0432662 A JPH0432662 A JP H0432662A JP 13908390 A JP13908390 A JP 13908390A JP 13908390 A JP13908390 A JP 13908390A JP H0432662 A JPH0432662 A JP H0432662A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- compressor
- temperature side
- refrigeration circuit
- condenser
- 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
- 238000005057 refrigeration Methods 0.000 title claims abstract description 80
- 239000003507 refrigerant Substances 0.000 claims abstract description 62
- 230000009977 dual effect Effects 0.000 claims description 5
- 239000003921 oil Substances 0.000 abstract description 21
- 239000010687 lubricating oil Substances 0.000 abstract description 17
- 230000006866 deterioration Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 8
- 239000010725 compressor oil Substances 0.000 description 4
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010726 refrigerant oil Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は低温環境試験装置その他に用いられる二元冷凍
装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a binary refrigeration system used in low-temperature environment test equipment and the like.
二元冷凍装置は、一般に、高温側冷凍回路と低温側冷凍
回路を備え、低温側冷凍回路において圧縮機を出た冷媒
の凝縮は、高温側冷凍回路中の膨張機構のあとに接続し
たカスケードコンデンサを通過する高温側冷媒により行
うようになっている。A binary refrigeration system generally has a high-temperature side refrigeration circuit and a low-temperature side refrigeration circuit, and condensation of the refrigerant exiting the compressor in the low-temperature side refrigeration circuit is carried out by a cascade condenser connected after the expansion mechanism in the high-temperature side refrigeration circuit. This is done by the high-temperature side refrigerant passing through.
ところで、冷凍装置において、圧縮機は冷媒圧縮により
相当発熱するが、主として大気への放熱、圧縮機潤滑オ
イルによる冷却および戻り冷媒による冷却の組み合わせ
によって冷却される。そして、潤滑オイルによる冷却を
効果あらしめるため、該オイルは、凝縮器を出た冷媒を
通過させるようにしたオイルクーラにより冷却する場合
がある。前記二元冷凍装置においても圧縮機の冷却は主
として前記王道りの冷却の組み合わせにより行われる。Incidentally, in a refrigeration system, a compressor generates considerable heat due to refrigerant compression, but is mainly cooled by a combination of heat radiation to the atmosphere, cooling by compressor lubricating oil, and cooling by return refrigerant. In order to make the cooling by the lubricating oil more effective, the oil may be cooled by an oil cooler through which the refrigerant exiting the condenser passes. Even in the dual refrigeration system, the compressor is mainly cooled by the combination of the classic cooling methods.
今、第２図に基づいて、従来の代表的な二元冷凍装置を
説明すると、高温側冷凍回路Ｃおよび低温側冷凍回路り
を備えている。Now, a typical conventional binary refrigeration system will be explained based on FIG. 2. It is provided with a high temperature side refrigeration circuit C and a low temperature side refrigeration circuit.
高温側冷凍回路Ｃはオイルクーラ１１を備えた圧縮機１
、空冷による凝縮器３、膨張機構（本例ではキャピラリ
ーチューブ）８およびカスケードコンデンサ５を備えて
おり、これらは冷媒が次のように循環するように配管接
続されている。The high temperature side refrigeration circuit C includes a compressor 1 equipped with an oil cooler 11
, an air-cooled condenser 3, an expansion mechanism (capillary tube in this example) 8, and a cascade condenser 5, which are connected by piping so that the refrigerant circulates as follows.
すなわち、圧縮機１において圧縮された冷媒が、まず、
凝縮器３を通過して凝縮されたのち、一部が圧縮機１の
オイルクーラ１１を、残部が低温側冷凍回路における圧
縮機２のオイルクーラ２１を経て再び凝縮器３において
冷やされたのち、冷媒中の水分を除去するドライヤ９を
経て膨張機構８に至り、ここで膨張してカスケードコン
デンサ５へ流れ、該コンデンサから再び圧縮機１へ戻る
ように循環する。That is, the refrigerant compressed in the compressor 1 first
After passing through the condenser 3 and being condensed, a portion passes through the oil cooler 11 of the compressor 1, and the remainder passes through the oil cooler 21 of the compressor 2 in the low temperature side refrigeration circuit and is cooled again in the condenser 3. The refrigerant passes through a dryer 9 that removes moisture from the refrigerant, reaches the expansion mechanism 8, expands there, flows to the cascade condenser 5, and is circulated from the condenser back to the compressor 1.
一方、低温側冷凍回路りは、前記オイルクーラ２１を備
えた圧縮機２、カスケードコンデンサ５中を通過する凝
縮管５０、膨張機構（本例ではキャピラリーチューブ）
８０および所望の低温を得るための蒸発器４を備えてお
り、これらは低温側冷媒が次のように循環するように配
管接続されている。On the other hand, the low temperature side refrigeration circuit includes a compressor 2 equipped with the oil cooler 21, a condensing pipe 50 passing through the cascade condenser 5, and an expansion mechanism (capillary tube in this example).
80 and an evaporator 4 for obtaining a desired low temperature, these are connected by piping so that the low temperature side refrigerant circulates as follows.
すなわち、圧縮機２において圧縮された冷媒が一旦高温
側冷凍回路Ｃにおける凝縮器３を通過して予冷されるよ
うにし、そのあとオイルセパレータ６において冷媒中の
オイルを分離されたのち、カスケードコンデンサ５内の
凝縮管５０を経て熱交換器７を通り、ドライヤ９０で冷
媒中の水分を除去されたのち膨張機構８０において膨張
し、蒸発器４へ流入し、そのあと前記熱交換器７を通過
して蒸発器４へ向かう冷媒を予冷したのち再び圧縮機２
へ戻るように循環する。That is, the refrigerant compressed in the compressor 2 once passes through the condenser 3 in the high-temperature side refrigeration circuit C to be precooled, and after that, the oil in the refrigerant is separated in the oil separator 6, and then the cascade condenser 5 The refrigerant passes through the heat exchanger 7 through the condensation pipe 50 in the refrigerant, and after removing moisture in the refrigerant in the dryer 90, it expands in the expansion mechanism 80, flows into the evaporator 4, and then passes through the heat exchanger 7. After pre-cooling the refrigerant heading to the evaporator 4, the refrigerant is transferred to the compressor 2 again.
Cycles back to .
〔発明が解決しようとする課題］
しかしながら、前記従来二元冷凍装置によると、低温側
冷凍回路りにおける圧縮機オイルクーラ２１には、高温
側圧縮機のオイルクーラ１１へ流れる高温側冷媒の残部
が流れるだけであるから、冷媒流量が少なく、したがっ
てオイルクーラ２１による圧縮機２における潤滑オイル
の冷却には限界がある。しかも、低温側冷凍回路りにお
いては、蒸発器４において低い蒸発温度を得るため、蒸
発器４を出た冷媒圧力を低く設定しているため、圧縮機
２への返り冷媒量が少ない運転となり、戻り冷媒による
圧縮機２の冷却が十分行えない。[Problems to be Solved by the Invention] However, according to the conventional dual refrigeration system, the remainder of the high temperature side refrigerant flowing to the oil cooler 11 of the high temperature side compressor is stored in the compressor oil cooler 21 in the low temperature side refrigeration circuit. Since the refrigerant only flows, the flow rate of the refrigerant is small, and therefore there is a limit to the cooling of the lubricating oil in the compressor 2 by the oil cooler 21. Moreover, in the low-temperature side refrigeration circuit, in order to obtain a low evaporation temperature in the evaporator 4, the pressure of the refrigerant exiting the evaporator 4 is set low, resulting in operation with a small amount of refrigerant returned to the compressor 2. The compressor 2 cannot be cooled sufficiently by the returned refrigerant.
従って、全体として圧縮機２の冷却を十分行い得す、そ
の結果、圧縮機２における潤滑オイルの温度や圧縮機２
からの吐出冷媒温度が上昇し、該潤滑オイルや冷媒を劣
化させたり、圧縮機２においてその摺動部の焼付等によ
る故障が発生するという問題があった。Therefore, the compressor 2 can be sufficiently cooled as a whole, and as a result, the temperature of the lubricating oil in the compressor 2 and the
There have been problems in that the temperature of the refrigerant discharged from the compressor increases, deteriorating the lubricating oil and refrigerant, and causing failures in the compressor 2 due to seizure of sliding parts and the like.
そこで本発明は、高温側冷凍回路と低温側冷凍回路を備
え、前記低温側冷凍回路中冷媒の凝縮を前記高温側冷凍
回路中のカスケードコンデンサを通過する冷媒にて行う
ようにした二元冷凍装置において、同タイプの従来装置
に比べ、前記低温側冷凍回路中の圧縮機潤滑オイルの冷
却を十分行うことができ、それによって低温側冷凍回路
における圧縮機潤滑オイルおよび圧縮機からの吐出冷媒
の昇温を抑制して該潤滑オイルや冷媒の劣化を防止し、
圧縮機における焼付等のによる故障発生も防止すること
ができる二元冷凍装置を提供することを目的とする。Therefore, the present invention provides a binary refrigeration system comprising a high-temperature side refrigeration circuit and a low-temperature side refrigeration circuit, and in which the refrigerant in the low-temperature side refrigeration circuit is condensed by the refrigerant passing through a cascade condenser in the high-temperature side refrigeration circuit. Compared to conventional equipment of the same type, the compressor lubricating oil in the low-temperature side refrigeration circuit can be cooled sufficiently, thereby reducing the rise of the compressor lubricating oil in the low-temperature side refrigeration circuit and the refrigerant discharged from the compressor. Controls temperature to prevent deterioration of the lubricating oil and refrigerant,
It is an object of the present invention to provide a binary refrigeration system that can prevent failures due to seizure or the like in a compressor.
〔課題を解決するための手段］
本発明は前記目的に従い、高温側冷凍回路と低温側冷凍
回路を備え、前記低温側冷凍回路中冷媒の凝縮を前記高
温側冷凍回路中のカスケードコンデンサを通過する冷媒
により行うようにした二元冷凍装置において、前記高温
側冷凍回路におけるカスケードコンデンサからの冷媒吸
込み配管を前記低温側冷凍回路における圧縮機のオイル
クーラを経て前記高温側冷凍回路の圧縮機吸入側へ接続
したことを特徴とする二元冷凍装置を提供するものであ
る。[Means for Solving the Problems] In accordance with the above object, the present invention includes a high temperature side refrigeration circuit and a low temperature side refrigeration circuit, and condenses the refrigerant in the low temperature side refrigeration circuit through a cascade condenser in the high temperature side refrigeration circuit. In a binary refrigeration system using a refrigerant, a refrigerant suction pipe from a cascade condenser in the high temperature side refrigeration circuit is connected to a compressor suction side of the high temperature side refrigeration circuit via an oil cooler of a compressor in the low temperature side refrigeration circuit. The present invention provides a dual refrigeration system characterized by the following:
本発明二元冷凍装置によると、低温側冷凍回路における
圧縮機オイルクーラには、前記カスケードコンデンサを
出た冷媒が全量流され、これによって、低温側冷凍回路
中の圧縮機が十分冷却される。According to the dual refrigeration system of the present invention, the entire amount of the refrigerant that has exited the cascade condenser flows into the compressor oil cooler in the low temperature side refrigeration circuit, thereby sufficiently cooling the compressor in the low temperature side refrigeration circuit.
〔実 施 例〕 以下本発明の一実施例を第１図に基づいて説明する。〔Example〕 An embodiment of the present invention will be described below with reference to FIG.
この二元冷凍装置は、高温側冷凍回路Ａおよび低温側冷
凍回路Ｂを備えている。各冷凍回路において、第２図に
示す従来装置における参照符号と同じ参照符号が付され
ている部品は、その参照符号が付された従来装置におけ
る部品と同し部品である。This binary refrigeration system includes a high temperature side refrigeration circuit A and a low temperature side refrigeration circuit B. In each refrigeration circuit, parts with the same reference numerals as those in the conventional apparatus shown in FIG. 2 are the same parts as those in the conventional apparatus.
高温側冷凍回路Ａは従来装置における高温側冷凍回路Ｃ
と異なっている。高温側冷凍回路Ａにおける各部品は次
のように冷媒が循環するように配管接続されている。High temperature side refrigeration circuit A is high temperature side refrigeration circuit C in the conventional device.
It is different from Each component in the high temperature side refrigeration circuit A is connected by piping so that the refrigerant circulates as follows.
すなわち、圧縮機１を出た冷媒は凝縮器３において凝縮
され、そのあと全量圧縮機オイルクーラ１１を通過し、
再び凝縮器３を経たのちドライヤ９において水分を除去
され、膨張機構８において膨張し、カスケードコンデン
サ５へ至り、該コンデンサを出たあと低温側冷凍回路Ｂ
における圧縮機２のオイルクーラ２１を全量通過して再
び圧縮機１へ戻るように循環する。That is, the refrigerant leaving the compressor 1 is condensed in the condenser 3, and then passes through the entire compressor oil cooler 11,
After passing through the condenser 3 again, moisture is removed in the dryer 9, and expanded in the expansion mechanism 8, reaching the cascade condenser 5, and after leaving the condenser, the low temperature side refrigeration circuit B
The entire amount passes through the oil cooler 21 of the compressor 2 and is circulated back to the compressor 1.
低温側冷凍回路Ｂは、前記従来装置における低温側冷凍
回路りと同様に冷媒を循環させる構成となっている。The low-temperature side refrigeration circuit B is configured to circulate refrigerant in the same manner as the low-temperature side refrigeration circuit in the conventional device.
この二元冷凍装置によると、高温側冷凍回路Ａにおいて
は圧縮機１を出て凝縮器３により凝縮された高温側冷媒
の全量が圧縮機オイルクーラ１１を通過するので、従来
装置に比べ高温側圧縮機の冷却を十分行える。According to this binary refrigeration system, in the high-temperature side refrigeration circuit A, the entire amount of the high-temperature side refrigerant that exits the compressor 1 and is condensed by the condenser 3 passes through the compressor oil cooler 11. The compressor can be cooled sufficiently.
また、低温側冷凍回路においては、高温側冷凍回路のカ
スケードコンデンサ５を通過して湿り状態となった高温
側冷媒の全量が低温側圧縮機２のオイルクーラ２１を通
過し、ここで熱交換することにより、該圧縮機２の潤滑
オイル温度を下げることができ、それによって圧縮機２
の吐出管温度を著しく低下させることができ、従って低
温側圧縮機２の信頼性が向上するとともに、オイルクー
ラ２１における熱交換により、高温側圧縮機１への液返
りを防止することもできるので、高温側圧縮機１の信頼
性も向上する。In addition, in the low-temperature side refrigeration circuit, the entire amount of the high-temperature side refrigerant that has passed through the cascade condenser 5 of the high-temperature side refrigeration circuit and has become wet passes through the oil cooler 21 of the low-temperature side compressor 2, where heat is exchanged. By this, the lubricating oil temperature of the compressor 2 can be lowered, thereby reducing the temperature of the lubricating oil of the compressor 2.
The temperature of the discharge pipe of the oil cooler 21 can be significantly lowered, thus improving the reliability of the low-temperature side compressor 2, and the heat exchange in the oil cooler 21 can also prevent liquid from returning to the high-temperature side compressor 1. , the reliability of the high temperature side compressor 1 is also improved.
さらに、蒸発器４による温度降下中は、低温側冷凍回路
Ｂにおいて高温側冷凍回路Ａの冷凍能力が必要とされる
が、低温安定時は、低温側冷凍回路Ｂにおける負荷が少
なくなるため、高温側冷凍回路の冷凍能力が余るので、
カスケードコンデンサ５からの返りガスによる低温側圧
縮機２の冷却は一層十分なものとなる。Furthermore, while the temperature is falling by the evaporator 4, the refrigeration capacity of the high temperature side refrigeration circuit A is required in the low temperature side refrigeration circuit B, but when the low temperature is stable, the load on the low temperature side refrigeration circuit B is reduced, so the high temperature Since there is extra refrigeration capacity in the side refrigeration circuit,
Cooling of the low temperature side compressor 2 by the return gas from the cascade condenser 5 becomes even more sufficient.
以上説明したようにこの実施例装置によると、従来の二
元冷凍装置に比べて圧縮機の冷却を十分に行うことがで
き、したがって、それだけ圧縮機潤滑オイルおよび使用
冷媒の劣化を防止することができるとともに、圧縮機摺
動部の焼付等による圧縮機の故障発生を防止することが
できる。As explained above, according to this example device, the compressor can be sufficiently cooled compared to the conventional binary refrigeration system, and therefore it is possible to prevent deterioration of the compressor lubricating oil and the refrigerant used. At the same time, it is possible to prevent compressor failures due to seizure of compressor sliding parts, etc.
［発明の効果］
本発明会唾希礫噸１によると、高温側冷凍回路と低温側
冷凍回路を備え、前記低温側冷凍回路中冷媒の凝縮を前
記高温側冷凍回路中のカスケードコンデンサを通過する
冷媒により行うようにした二元冷凍装置において、同タ
イプの従来装置に比べ、圧縮機、特に前記低温側冷凍回
路中の圧縮機の潤滑オイルの冷却を十分行うことができ
、それによって低温側冷凍回路における冷媒、圧縮機潤
滑オイルの昇温を防止し、該冷媒、潤滑オイルの劣化を
防止でき、また、圧縮機における焼付等の昇温による故
障発生を防止するができる。[Effects of the Invention] According to the Society of Inventors' Report 1, a high-temperature side refrigeration circuit and a low-temperature side refrigeration circuit are provided, and the refrigerant condensed in the low-temperature side refrigeration circuit passes through a cascade condenser in the high-temperature side refrigeration circuit. In a binary refrigeration system using a refrigerant, compared to conventional equipment of the same type, the compressor, especially the lubricating oil of the compressor in the low-temperature side refrigeration circuit, can be cooled sufficiently. It is possible to prevent the temperature of the refrigerant and compressor lubricating oil in the circuit from rising, thereby preventing deterioration of the refrigerant and lubricating oil, and also preventing failures due to temperature rise such as seizure in the compressor.
第１図は本発明の一実施例を示す冷凍装置回路図、第２
図は従来例説明図である。
Ａ・・・高温側冷凍回路
１・・・圧縮機
１１・・・オイルクーラ
３・・・凝縮器
９・・・ドライヤ
８・・・膨張機構
５・・・カスケードコンデンサ
Ｂ・・・低温側冷凍回路
２・・・圧縮機
２１・・・オイルクーラ
５０・・・凝縮管
７・・・熱交換器
９０・・・ドライヤ
８０・・・膨張機構
４・・・蒸発器
６・・・オイルセパレータ
出願人 タハイエスペック株式会社FIG. 1 is a circuit diagram of a refrigeration system showing one embodiment of the present invention, and FIG.
The figure is an explanatory diagram of a conventional example. A... High temperature side refrigeration circuit 1... Compressor 11... Oil cooler 3... Condenser 9... Dryer 8... Expansion mechanism 5... Cascade condenser B... Low temperature side refrigeration Circuit 2... Compressor 21... Oil cooler 50... Condensing tube 7... Heat exchanger 90... Dryer 80... Expansion mechanism 4... Evaporator 6... Oil separator Application People Tahai Espec Co., Ltd.
Claims (1)
温側冷凍回路中冷媒の凝縮を前記高温側冷凍回路中のカ
スケードコンデンサを通過する冷媒により行うようにし
た二元冷凍装置において、前記高温側冷凍回路における
カスケードコンデンサからの冷媒吸込み配管を前記低温
側冷凍回路における圧縮機のオイルクーラを経て前記高
温側冷凍回路の圧縮機吸入側へ接続したことを特徴とす
る二元冷凍装置。(1) In a binary refrigeration system comprising a high temperature side refrigeration circuit and a low temperature side refrigeration circuit, the refrigerant in the low temperature side refrigeration circuit is condensed by the refrigerant passing through a cascade condenser in the high temperature side refrigeration circuit. A dual refrigeration system characterized in that a refrigerant suction pipe from a cascade condenser in a high temperature side refrigeration circuit is connected to a compressor suction side of the high temperature side refrigeration circuit via an oil cooler of a compressor in the low temperature side refrigeration circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13908390A JPH0432662A (en) | 1990-05-28 | 1990-05-28 | Binary refrigeration arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13908390A JPH0432662A (en) | 1990-05-28 | 1990-05-28 | Binary refrigeration arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0432662A true JPH0432662A (en) | 1992-02-04 |
Family
ID=15237089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13908390A Pending JPH0432662A (en) | 1990-05-28 | 1990-05-28 | Binary refrigeration arrangement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0432662A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0696446A1 (en) | 1994-08-09 | 1996-02-14 | Olympus Optical Co., Ltd. | Intraluminally indwelling stent and method for manufacturing the same |
| JP2014145500A (en) * | 2013-01-28 | 2014-08-14 | Toshiba Carrier Corp | Dual refrigeration cycle device |
| CN104813120A (en) * | 2012-11-20 | 2015-07-29 | 三菱电机株式会社 | Refrigeration device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5421658A (en) * | 1977-07-19 | 1979-02-19 | Sanyo Electric Co Ltd | Two-dimensional refrigerating cycle |
| JPS62294855A (en) * | 1986-05-08 | 1987-12-22 | 三洋電機株式会社 | Refrigerator |
-
1990
- 1990-05-28 JP JP13908390A patent/JPH0432662A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5421658A (en) * | 1977-07-19 | 1979-02-19 | Sanyo Electric Co Ltd | Two-dimensional refrigerating cycle |
| JPS62294855A (en) * | 1986-05-08 | 1987-12-22 | 三洋電機株式会社 | Refrigerator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0696446A1 (en) | 1994-08-09 | 1996-02-14 | Olympus Optical Co., Ltd. | Intraluminally indwelling stent and method for manufacturing the same |
| CN104813120A (en) * | 2012-11-20 | 2015-07-29 | 三菱电机株式会社 | Refrigeration device |
| CN104813120B (en) * | 2012-11-20 | 2016-08-17 | 三菱电机株式会社 | Refrigerating plant |
| JP2014145500A (en) * | 2013-01-28 | 2014-08-14 | Toshiba Carrier Corp | Dual refrigeration cycle device |
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