JPH02287059A - Refrigeration cycle - Google Patents
Refrigeration cycleInfo
- Publication number
- JPH02287059A JPH02287059A JP10444989A JP10444989A JPH02287059A JP H02287059 A JPH02287059 A JP H02287059A JP 10444989 A JP10444989 A JP 10444989A JP 10444989 A JP10444989 A JP 10444989A JP H02287059 A JPH02287059 A JP H02287059A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- cooling
- gas
- supercooler
- refrigerant
- 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 title claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 11
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 abstract description 15
- 239000007788 liquid Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005461 lubrication Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 230000008016 vaporization Effects 0.000 abstract 1
- 238000009834 vaporization Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 13
- 238000012423 maintenance Methods 0.000 description 4
- 238000004781 supercooling Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/13—Economisers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2509—Economiser valves
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は冷凍機、空調機の二段圧縮冷凍サイクルに係り
、特に油冷却機構に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a two-stage compression refrigeration cycle for refrigerators and air conditioners, and particularly relates to an oil cooling mechanism.
従来の装置は、１９８８年版日立載温産業機器データグ
プク８７８真の二段圧縮に記載のように、冷凍サイクル
中における油冷却器の油冷却方式としては冷却水循環に
よる水冷式油冷却器が主流であった。In conventional equipment, as described in 1988 edition Hitachi Industrial Equipment Data Gupuku 878 True Two-Stage Compression, water-cooled oil coolers using cooling water circulation were the mainstream oil cooling method for oil coolers during the refrigeration cycle. Ta.
上記従来技術においては、水冷式の油冷却器は水側の経
時的な汚れによる熱交換効率低下を防止するため、定期
的に水質の点検、冷却管内面の汚れ清掃等のメンテナン
スを必要とするという欠点がある。In the above-mentioned conventional technology, water-cooled oil coolers require maintenance such as regular water quality inspection and cleaning of dirt on the inner surface of the cooling pipe in order to prevent heat exchange efficiency from decreasing due to dirt on the water side over time. There is a drawback.
また、給油温度が低く油冷却が不要な状態でも油冷却作
用を続ける九め、油中への冷媒の溶は込み量が増加し、
給油圧力の低下、圧縮機の軸受のＳ滑不良を招くという
点について配置がされていない。In addition, the oil cooling effect continues even when the oil supply temperature is low and oil cooling is not required, and the amount of refrigerant dissolved in the oil increases.
The arrangement is not designed to reduce the oil supply pressure and cause poor S slippage of the compressor bearing.
本発明の目的は、水側のメンテナンスを簡略化、ま九は
不要化とすること、および、油の過冷却を防止し、圧縮
機の軸受の給油の信頼性を向上することにある。The objects of the present invention are to simplify the maintenance on the water side and eliminate the need for maintenance, to prevent overcooling of oil, and to improve the reliability of oil supply to compressor bearings.
上記目的を達成するために、油冷却器の油冷却用として
液冷媒を飽和湿りガス状にし九ものを使用し、また、油
温が所定温度以下で油の冷却な必要としない場合には、
給油１話度調５ａ（ｒ）信号により油冷却用液冷媒電磁
弁を閉状態として送液を停止し、油の過冷却を防止する
ものである。In order to achieve the above purpose, a liquid refrigerant in the form of a saturated wet gas is used for oil cooling in an oil cooler, and when the oil temperature is below a predetermined temperature and there is no need to cool the oil,
The oil cooling liquid refrigerant electromagnetic valve is closed in response to the oil supply 1 episode scale 5a(r) signal to stop the liquid supply, thereby preventing overcooling of the oil.
油冷却後の結オロ湿りガスと高圧液冷媒過冷却後の記刈
湿りガスは圧縮機内の中間圧力を有するケーシングに戻
され、圧締機内にて低段側の吐出ガスと混合して旨段側
に吸入される。この際両者のケーシングへの戻し口は別
々の箇所に接続するため、飽和ガス同士が干渉して流ｊ
ｉｌｔを制限し合って相互の冷却機能な損つことを防止
している。The condensed wet gas after cooling with oil and the wet gas after supercooling of high-pressure liquid refrigerant are returned to the casing with intermediate pressure inside the compressor, and mixed with the discharged gas on the low stage side in the compacting machine to form a compressor. Inhaled to the side. At this time, since the return ports to both casings are connected to different points, the saturated gas may interfere with each other and the flow may be interrupted.
The ilts are limited to each other to prevent mutual loss of cooling function.
以Ｆ、本発明の一実施例を第１図により説明する。図中
の矢印は冷媒の流れ方向を示す。本冷凍サイクルＶｃｊ
ｌ１１−いて、圧縮機ｌにて冷媒は圧縮され高温高圧の
ガスとなって吐出され、油分離器８内にて冷媒ガスと油
に分離される。冷媒ガスは凝縮器４にて凝縮液となり、
過冷却器６にて液温ｔ’ｙげ、さらに膨張弁７によつ、
低圧のａリガスとなり蒸発器８内にて蒸発して冷却作用
な行った後圧圧縮機１に吸入される。Hereinafter, one embodiment of the present invention will be described with reference to FIG. Arrows in the figure indicate the flow direction of the refrigerant. Main refrigeration cycle Vcj
11-, the refrigerant is compressed by the compressor 1 and discharged as a high-temperature, high-pressure gas, which is separated into refrigerant gas and oil in the oil separator 8. The refrigerant gas becomes a condensate in the condenser 4,
The liquid temperature is increased in the supercooler 6, and further in the expansion valve 7.
It becomes low-pressure aligas, evaporates in the evaporator 8, performs a cooling action, and is then sucked into the compressor 1.
一方、油分離器８にて分離した油は油冷却ｆｉ１１にて
冷却され温度を４０〜６０″ＣＩＣ下げ、圧縮機１の各
軸受へ給油される。油冷却器１１は冷媒による冷媒冷却
方式である。On the other hand, the oil separated in the oil separator 8 is cooled in the oil cooling fi 11 to lower the temperature by 40 to 60" CIC, and is supplied to each bearing of the compressor 1. The oil cooler 11 uses a refrigerant cooling method. be.
凝縮器４からの高圧液冷媒は、過冷却６６に至る途中で
二方向に分岐し、一方は過冷却器６内で冷却される主流
液となり、また他方はその先でさらに分岐し、圧縮機ｌ
の運転と連動して開く過冷却器用電磁弁９を経て過冷却
器用膨張弁１０にて低温で中間圧力の飽和ａリガスに変
化して過冷却器６内で主流液を過冷却し冷凍能力を向上
させる流れと、油冷却器用電磁弁１２を経て油冷却器用
膨張弁１８にて低温で中間圧力の飽和湿りガスに変化し
て冷媒冷却式油冷却器１１内で油分／ｌａ器８からの油
を冷却する流れとに分かれる。この匝両者は圧縮機の中
間ケーシング部２に吸入され、圧縮機１円で低段吐出ガ
スと混合し、高段側に吸入される。The high-pressure liquid refrigerant from the condenser 4 branches into two directions on the way to the supercooler 66, one becoming the main liquid cooled in the supercooler 6, and the other further branching beyond that to the compressor. l
The liquid passes through the supercooler solenoid valve 9, which opens in conjunction with the operation of the supercooler, and changes into a saturated aligas at low temperature and intermediate pressure at the supercooler expansion valve 10, supercooling the mainstream liquid in the supercooler 6 and increasing the refrigerating capacity. The oil from the oil/la unit 8 is changed into saturated wet gas at a low temperature and intermediate pressure at the oil cooler expansion valve 18 via the oil cooler solenoid valve 12 and then in the refrigerant-cooled oil cooler 11. It is divided into a cooling flow and a cooling flow. Both gases are sucked into the intermediate casing part 2 of the compressor, mixed with the low-stage discharge gas at one yen of the compressor, and sucked into the high-stage side.
油冷却器用電磁弁１２は圧縮機ｌの運転と連動して開く
が、給油！度調１１ｉ１１４と連動し、検知油温か設定
直膨以下になると閉状態となり、飽和ガスの流れを遮祈
して油の過冷却を防止する。The oil cooler solenoid valve 12 opens in conjunction with the operation of the compressor l, but it is not possible to refuel! In conjunction with the temperature scale 11i114, when the detected oil temperature falls below the direct expansion setting, it becomes closed, blocking the flow of saturated gas and preventing overcooling of the oil.
本発明によれば、過冷却器６内後と油冷却器通過後の廟
昶ガスが互いに冷却機能を損なうことなく、油冷却作用
と主流液の冷却作用を行うことが可能である。また油の
冷却に冷却水を使わないため経時的な熱父換効率の低下
は無く、油冷却器のメンテナンスは不要化できる。According to the present invention, it is possible to perform the oil cooling action and the mainstream liquid cooling action without mutually impairing the cooling function of the mausoleum gas after passing through the supercooler 6 and after passing through the oil cooler. In addition, since no cooling water is used to cool the oil, there is no decline in heat exchange efficiency over time, and maintenance of the oil cooler can be eliminated.
また油の過冷却を防止できるため給油圧力の低−Ｆ、圧
縮機の軸受の潤滑不良を抑制して圧縮機の信頼性向上な
はかることが０］″能である。In addition, since supercooling of the oil can be prevented, it is possible to suppress low oil supply pressure and poor lubrication of the compressor bearings, thereby improving the reliability of the compressor.
第１図は本発明の一実施例な示す冷凍丈イクル系統図で
ある。
１・・・圧縮＠ ２・・・圧縮機の中間圧力ケーシン
グ部 ８・・・油分子ｉＡ器 ４・・・凝縮器
６・・・過冷却６ ９・・・過冷却器用電磁弁 １０
・・・過冷却器用膨張弁 １１・・・冷媒冷却式油冷
却器１２・・・油冷却器用電磁弁 １Ｂ・・・油冷却
器用膨張弁 １４・・・給油温度調節器。FIG. 1 is a refrigeration cycle system diagram showing one embodiment of the present invention. 1... Compression @ 2... Intermediate pressure casing part of compressor 8... Oil molecule iA device 4... Condenser
6... Supercooling 6 9... Solenoid valve for supercooler 10
... Expansion valve for supercooler 11 ... Refrigerant-cooled oil cooler 12 ... Solenoid valve for oil cooler 1B ... Expansion valve for oil cooler 14 ... Oil supply temperature regulator.
Claims (1)
発器等により形成される二段圧縮冷凍サイクルにおいて
、冷媒冷却式油冷却器を冷却後の飽和湿りガスおよび過
冷却器を冷却後の飽和湿りガスを圧縮機の中間圧力を有
するケーシングの別々の箇所へ戻し、かつ油冷却器に流
入する油冷却のための飽和湿りガスを給油温度にて制御
することを特徴とする冷凍サイクル。1. In a two-stage compression refrigeration cycle formed by a compressor, condenser, expansion valve, supercooler, oil cooler, evaporator, etc., the saturated wet gas after cooling the refrigerant-cooled oil cooler and the supercooler The saturated humid gas after cooling is returned to separate parts of the casing having an intermediate pressure of the compressor, and the saturated humid gas for cooling the oil flowing into the oil cooler is controlled by the oil supply temperature. Refrigeration cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01104449A JP3028817B2 (en) | 1989-04-26 | 1989-04-26 | Refrigeration cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01104449A JP3028817B2 (en) | 1989-04-26 | 1989-04-26 | Refrigeration cycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02287059A true JPH02287059A (en) | 1990-11-27 |
| JP3028817B2 JP3028817B2 (en) | 2000-04-04 |
Family
ID=14380941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01104449A Expired - Fee Related JP3028817B2 (en) | 1989-04-26 | 1989-04-26 | Refrigeration cycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3028817B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001191786A (en) * | 1999-12-09 | 2001-07-17 | Valeo Climatisation | Air conditioning circuit especially for automobile or the like |
| JP2012137214A (en) * | 2010-12-24 | 2012-07-19 | Mitsubishi Electric Corp | Refrigerating device |
| JP2015102319A (en) * | 2013-11-28 | 2015-06-04 | 三菱電機株式会社 | Refrigeration cycle device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5533176U (en) * | 1978-08-25 | 1980-03-03 | ||
| JPS5666656A (en) * | 1979-11-02 | 1981-06-05 | Hitachi Ltd | Double refrigerating plant |
| JPS6237990U (en) * | 1985-08-23 | 1987-03-06 |
-
1989
- 1989-04-26 JP JP01104449A patent/JP3028817B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5533176U (en) * | 1978-08-25 | 1980-03-03 | ||
| JPS5666656A (en) * | 1979-11-02 | 1981-06-05 | Hitachi Ltd | Double refrigerating plant |
| JPS6237990U (en) * | 1985-08-23 | 1987-03-06 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001191786A (en) * | 1999-12-09 | 2001-07-17 | Valeo Climatisation | Air conditioning circuit especially for automobile or the like |
| JP2012137214A (en) * | 2010-12-24 | 2012-07-19 | Mitsubishi Electric Corp | Refrigerating device |
| JP2015102319A (en) * | 2013-11-28 | 2015-06-04 | 三菱電機株式会社 | Refrigeration cycle device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3028817B2 (en) | 2000-04-04 |
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