JPH0762577B2 - Turbo refrigerator - Google Patents
Turbo refrigeratorInfo
- Publication number
- JPH0762577B2 JPH0762577B2 JP2109644A JP10964490A JPH0762577B2 JP H0762577 B2 JPH0762577 B2 JP H0762577B2 JP 2109644 A JP2109644 A JP 2109644A JP 10964490 A JP10964490 A JP 10964490A JP H0762577 B2 JPH0762577 B2 JP H0762577B2
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- liquid
- condenser
- oil cooler
- storage chamber
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、ターボ冷凍機に充填した冷媒を外部に回収す
る際に有効な改良構造に関する。Description: TECHNICAL FIELD The present invention relates to an improved structure effective in recovering a refrigerant filled in a turbo refrigerator to the outside.
（従来の技術） 従来、雑誌「冷凍空調技術VOL.25 NO.288」（昭和49年
２月号）第20頁7.4冷媒の抽出の頁に記載されているよ
うに、この種ターボ冷凍機では、冷媒回路中に充填した
冷媒をシーズンオフ或は修理等のために外部に取出して
回収することがあるが、この回収を行うには、まず、冷
媒回路内の圧力を窒素ガスや空気等で大気圧以上に加圧
して、冷媒回路内に溜った液状の冷媒を、蒸発器等に接
続する回収タンク内に回収し、次に、冷媒回路内に残留
するガス状の冷媒を、ターボ冷凍機に付属して設けられ
る抽気装置の運転により液化して同タンクに回収するよ
うにしている。(Prior Art) Conventionally, as described in the page “7.4 Refrigerant Extraction” on page 20 of the magazine “Refrigeration and Air Conditioning Technology VOL.25 NO.288” (February 1974 issue) , The refrigerant filled in the refrigerant circuit may be taken out and collected for off-season or repair, etc., but in order to perform this recovery, first set the pressure in the refrigerant circuit with nitrogen gas or air. The liquid refrigerant that is pressurized above atmospheric pressure and collects in the refrigerant circuit is collected in a recovery tank that is connected to an evaporator, and then the gaseous refrigerant that remains in the refrigerant circuit is collected in a turbo refrigerator. It is liquefied and collected in the same tank by the operation of the air extraction device attached to the.
（発明が解決しようとする課題） しかし、以上のような回収手順を踏んでも、この種ター
ボ冷凍機では、ターボ圧縮機の油を冷媒により冷却する
油冷却器が介装されたり、又、凝縮器で凝縮した液冷媒
を溜める液溜室が設けられるのが一般的であるため、前
記油冷却器での冷媒通路部分や、又、前記液溜室と配管
との接続部分等で液が滞留し易く、このため、抽気装置
の運転によっても、液状とされる滞留冷媒を該抽気装置
側に取込むことは容易でなく、従って、冷媒の全量回収
は困難であると共に、回収時間も長時間を要する問題が
ある。(Problems to be Solved by the Invention) However, even if the recovery procedure as described above is taken, in this type of turbo refrigerator, an oil cooler for cooling the oil of the turbo compressor with a refrigerant is provided, or the condenser is condensed. Since a liquid storage chamber for storing the liquid refrigerant condensed in the cooler is generally provided, the liquid stays in the refrigerant passage part in the oil cooler or in the connection part between the liquid storage chamber and the pipe. Therefore, even if the extraction device is operated, it is not easy to take the accumulated refrigerant in the liquid state into the extraction device side. Therefore, it is difficult to recover the entire amount of the refrigerant, and the recovery time is long. There is a problem that requires.
本発明の目的は、油冷却器や液為室での滞留液冷媒を気
化させて一旦ガス状にし、抽気装置の運転による回収効
率を高めて、冷媒回収率の向上及び回収時間の短縮化が
図れるターボ冷凍機を提供することにある。An object of the present invention is to evaporate the stagnant liquid refrigerant in the oil cooler or the liquidizing chamber to once turn it into a gas state, improve the recovery efficiency by operating the extraction device, and improve the refrigerant recovery rate and shorten the recovery time. An object of the present invention is to provide a turbo refrigerator that can be achieved.
（課題を解決するための手段） そこで、本発明では、上記目的を達成するため、ターボ
圧縮機（１）、凝縮器（２）、膨張機構（３）及び蒸発
器（４）を順次接続して冷媒回路（５）を構成し、前記
圧縮機（１）の油を前記冷媒回路（５）から取り込む液
冷媒で冷却する油冷却器（６）を設けると共に、前記冷
媒回路（５）から取込むガスを液化して液冷媒と不凝縮
ガスとに分離した後、液冷媒を前記冷媒回路（５）に戻
す抽気装置（７）を設けたターボ冷凍機において、前記
油冷却器（６）に、前記冷媒回路（５）の充填冷媒を外
部に回収する冷媒回収時、前記油冷却器（６）の滞留液
冷媒を気化させるヒータ（８）を付設することにした。(Means for Solving the Problems) Therefore, in the present invention, in order to achieve the above object, the turbo compressor (1), the condenser (2), the expansion mechanism (3) and the evaporator (4) are sequentially connected. A refrigerant circuit (5) is provided, and an oil cooler (6) for cooling the oil of the compressor (1) with a liquid refrigerant taken in from the refrigerant circuit (5) is provided, and the refrigerant circuit (5) is also provided. In the turbo refrigerator provided with the extraction device (7) for returning the liquid refrigerant to the refrigerant circuit (5) after liquefying the gas to be separated into the liquid refrigerant and the non-condensed gas, the oil cooler (6) is provided. A heater (8) for vaporizing the stagnant liquid refrigerant in the oil cooler (6) at the time of recovering the refrigerant for recovering the refrigerant charged in the refrigerant circuit (5) to the outside is provided.
又、上記構成に加えて、凝縮器（２）の出口側に、該凝
縮器（２）で凝縮する液冷媒を溜める液溜室（９）を備
え、この液溜室（９）に、外部への冷媒回収時、該液溜
室（９）の滞留液冷媒を気化させるヒータ（10）を配設
することにした。In addition to the above configuration, a liquid storage chamber (9) for storing the liquid refrigerant condensed in the condenser (2) is provided on the outlet side of the condenser (2), and the liquid storage chamber (9) is provided with an external device. A heater (10) for vaporizing the stagnant liquid refrigerant in the liquid storage chamber (9) is provided at the time of refrigerant recovery to the.
（作用） 前記冷媒回路（５）の充填冷媒を外部に回収する冷媒回
収時、油冷却器（６）内に滞留する液冷媒は、ヒータ
（８）による加熱で蒸発気化されて一旦ガス状とされ
る。このため、前記油冷却器（６）内の滞留冷媒を前記
冷媒回路（５）を経て抽器装置（７）に容易に取込むこ
とができ、該抽器装置（７）での再凝縮液化により、滞
留冷媒を容易に、かつ、短時間で回収できるのである。(Operation) During the recovery of the refrigerant for recovering the refrigerant filled in the refrigerant circuit (5) to the outside, the liquid refrigerant staying in the oil cooler (6) is evaporated and vaporized by the heating by the heater (8) and is once turned into a gaseous state. To be done. Therefore, the accumulated refrigerant in the oil cooler (6) can be easily taken into the extractor device (7) through the refrigerant circuit (5), and the recondensed liquefaction in the extractor device (7) can be performed. Thus, the retained refrigerant can be easily recovered in a short time.
加えて液溜室（９）にヒータ（10）を配設することによ
り、液溜室（９）での滞留液冷媒の蒸発気化も促進で
き、抽器装置（７）による回収を一層促進できるのであ
る。In addition, by disposing the heater (10) in the liquid storage chamber (9), the evaporation and evaporation of the stagnant liquid refrigerant in the liquid storage chamber (9) can be promoted, and the recovery by the extractor device (7) can be further promoted. Of.
（実施例） 図面に示す冷凍機は、モータ（11）で高速回転されるイ
ンペラ（12）をもつターボ圧縮機（１）と、冷却水を流
通させる多数の冷却水配管（21）（22）を配設した凝縮
器（２）と、オリフィスで構成する膨張機構（３）、及
び、冷房用熱源等として取出す多数の冷水取出管（41）
（42）を配設した蒸発器（４）を順次接続して冷媒回路
（５）を構成したものである。(Embodiment) The refrigerator shown in the drawings has a turbo compressor (1) having an impeller (12) rotated at high speed by a motor (11), and a large number of cooling water pipes (21) (22) for circulating cooling water. A condenser (2) in which is installed, an expansion mechanism (3) composed of orifices, and a large number of cold water extraction pipes (41) taken out as heat sources for cooling, etc.
The refrigerant circuit (5) is configured by sequentially connecting the evaporators (4) provided with (42).
さらに、前記凝縮器（２）と膨張機構（３）との間に
は、前記凝縮器（２）で凝縮した液冷媒を溜める液溜室
（９）を設けている。Further, a liquid storage chamber (9) is provided between the condenser (2) and the expansion mechanism (3) to store the liquid refrigerant condensed in the condenser (2).
又、冷凍機には、前記圧縮機（１）の軸受等の潤滑に用
いる油を冷却するための油冷却器（６）を備えており、
該油冷却器（６）は、そのジャケット（61）内に、圧縮
機ハウジング（13）に連通し、多数枚のバッフル（62）
により蛇行状とされる油通路（63）と、前記液溜室
（９）底部に接続される冷媒入口管（92）及び前記蒸発
器器（４）に接続される冷媒出口管（93）を介して前記
凝縮器（２）から前記蒸発器（４）に向けて流す冷却用
冷媒の往路配管（64）及び復路配管（65）を設けてい
る。The refrigerator is equipped with an oil cooler (6) for cooling the oil used for lubricating the bearing of the compressor (1),
The oil cooler (6) communicates with the compressor housing (13) in its jacket (61), and has a large number of baffles (62).
A meandering oil passage (63), a refrigerant inlet pipe (92) connected to the bottom of the liquid reservoir (9) and a refrigerant outlet pipe (93) connected to the evaporator (4). An outflow pipe (64) and a return pipe (65) for the cooling refrigerant flowing from the condenser (2) toward the evaporator (4) are provided.
尚、前記油通路（63）の油取入口（66）には、圧縮機ハ
ウジング（13）のギアケース底部等に設ける油流出口
（14）が接続され、又、冷却後の油を取出す油取出口
（67）は、前記ハウジング（13）上部の給油口（15）に
接続するようにしている。The oil inlet (66) of the oil passage (63) is connected to an oil outlet (14) provided at the bottom of the gear case of the compressor housing (13), etc. The outlet (67) is connected to the oil supply port (15) in the upper part of the housing (13).
又、前記凝縮器（２）と蒸発器（４）との各ガス域間に
は、減圧弁（71）、往復動式圧縮機等を用いた抽気ポン
プ（72）、ファン（73）を付設する凝縮器（74）、セパ
レータ（75）を順次介装した抽器装置（７）を接続し、
凝縮器（２）から電磁弁（70）を開けて取込むガスを前
記凝縮器（74）で凝縮液化して前記セパレータ（75）で
その液化した液冷媒と空気等の不凝縮ガスとを分離し、
放出路（76）及びリリーフ弁（77）を介して不凝縮ガス
を大気に放出すると共に、液冷媒を弁（78）を介して蒸
発器（４）に注入するようにしている。尚、（7a）は水
排出弁、（7b）は圧力計であり、又、（7c）は油タン
ク、（7d）は注油弁である。In addition, a pressure reducing valve (71), a bleed pump (72) using a reciprocating compressor, and a fan (73) are provided between the gas regions of the condenser (2) and the evaporator (4). Connect the condenser (74) and the extractor device (7) in which the separator (75) is sequentially inserted,
The gas taken in by opening the solenoid valve (70) from the condenser (2) is condensed and liquefied by the condenser (74), and the liquefied liquid refrigerant and the non-condensed gas such as air are separated by the separator (75). Then
The non-condensable gas is discharged to the atmosphere through the discharge passage (76) and the relief valve (77), and the liquid refrigerant is injected into the evaporator (4) through the valve (78). In addition, (7a) is a water discharge valve, (7b) is a pressure gauge, (7c) is an oil tank, and (7d) is an oil injection valve.
以上の構成で、冷凍機の修理等の場合であって冷媒回路
（５）に充填した冷媒を蒸発器（４）の底部に開閉弁
（16）を介して接続する回収タンク（17）に回収する場
合、その回収率の向上及び時間短縮を図るために、前記
油冷却器（６）を構成するジャケット（61）の外周部
に、油冷却器（６）での滞留液冷媒を気化させるコイル
状で且つバンド型としたヒータ（８）を巻回するのであ
る。With the above configuration, in the case of repairing a refrigerator or the like, the refrigerant filled in the refrigerant circuit (5) is recovered in a recovery tank (17) connected to the bottom of the evaporator (4) through an on-off valve (16). In this case, in order to improve the recovery rate and shorten the time, a coil for vaporizing the retained liquid refrigerant in the oil cooler (6) is provided on the outer peripheral portion of the jacket (61) that constitutes the oil cooler (6). The heater (8) which is shaped like a band is wound.
そして、冷媒回収時、より具体的には前記抽気装置
（７）の運転前からその運転中にかけて、前記ヒータ
（８）をヒータ駆動手段（81）により作動させることに
より、ジャケット（61）を外周部から加熱するのであ
る。Then, at the time of collecting the refrigerant, more specifically, before the operation of the extraction device (7) and during the operation thereof, the heater (8) is operated by the heater driving means (81), so that the jacket (61) is surrounded. It is heated from the part.
又、このとき、過剰な加熱を防止するため、前記ジャケ
ット（61）に温度検出手段（82）を付設すると共に、前
記ヒータ駆動手段（81）に、前記検出手段（82）による
検出温度が所定値以下ならヒータ（８）をオンするが、
所定値を越えるとオフするオン・オフ機構（83）を接続
するのである。Further, at this time, in order to prevent excessive heating, a temperature detecting means (82) is attached to the jacket (61), and the heater driving means (81) is provided with a predetermined temperature detected by the detecting means (82). If it is less than the value, the heater (8) is turned on,
An on / off mechanism (83) that turns off when a predetermined value is exceeded is connected.
以上の構成によれば、前記油冷却器（６）で滞留する液
冷媒は、前記ヒータ（８）による加熱で蒸発気化され
る。このため、前記抽気装置（７）の運転により、前記
油冷却器（６）内のガス化された滞留冷媒を前記凝縮器
（２）を経て前記抽気装置（７）に容易に取込むことが
でき、該抽気装置（７）で再凝縮した後、滞留冷媒を、
前記蒸発器（４）に注入して、回収タンク（17）に容易
に回収できるので、回収率を向上できながら回収時間も
短縮できるのである。According to the above configuration, the liquid refrigerant staying in the oil cooler (6) is evaporated and vaporized by being heated by the heater (8). Therefore, by operating the extraction device (7), the gasified staying refrigerant in the oil cooler (6) can be easily taken into the extraction device (7) via the condenser (2). After being re-condensed by the extraction device (7), the retained refrigerant is
Since it can be injected into the evaporator (4) and easily recovered in the recovery tank (17), the recovery rate can be improved and the recovery time can be shortened.
又、温度検出手段（82）及びオン・オフ機構（83）を設
けたから、前記抽気装置（７）に供給される冷媒ガスの
過剰加熱が防止でき、安全な回収運転も行える。Further, since the temperature detecting means (82) and the on / off mechanism (83) are provided, it is possible to prevent the refrigerant gas supplied to the extraction device (7) from being overheated, and to perform a safe recovery operation.
ところで、以上の構成において、前記凝縮器（２）と膨
張機構（３）との間には、前記凝縮器（２）で凝縮した
液冷媒を溜める前記液溜室（９）を設けており、この液
溜室（９）の底部には、前記膨張機構（３）に至る配管
（91）並びに、前記冷却器（６）への冷媒入口管（9
2）、更には、前記圧縮機（１）を冷却するための圧縮
機冷却配管（94）を接続している。By the way, in the above configuration, the liquid storage chamber (9) for storing the liquid refrigerant condensed in the condenser (2) is provided between the condenser (2) and the expansion mechanism (3), At the bottom of the liquid storage chamber (9), a pipe (91) leading to the expansion mechanism (3) and a refrigerant inlet pipe (9) to the cooler (6).
2) Furthermore, a compressor cooling pipe (94) for cooling the compressor (1) is connected.
このため、前記液溜室（９）の底部には、複数本の配管
が接続される関係上、ここでもまた液冷媒が溜り易い。
そこで、該液溜室（９）の底部に、カートリッジ型のヒ
ータ（10）を配設するのであり、この場合には、冷媒回
収時、ヒータ駆動手段（18）による前記ヒータ（10）の
加熱により、液溜室（９）に溜る液冷媒の蒸発気化も促
進でき、抽気装置（７）による回収を一層促進できて一
層の冷媒回収率の向上及び回収時間の短縮化が図れるの
である。Therefore, since a plurality of pipes are connected to the bottom of the liquid storage chamber (9), the liquid refrigerant is likely to accumulate also here.
Therefore, a cartridge type heater (10) is arranged at the bottom of the liquid reservoir (9). In this case, when the refrigerant is collected, the heater (10) is heated by the heater driving means (18). As a result, the evaporation and vaporization of the liquid refrigerant accumulated in the liquid storage chamber (9) can be promoted, and the recovery by the air extraction device (7) can be further promoted to further improve the refrigerant recovery rate and shorten the recovery time.
（発明の効果） 以上本発明では、油冷却器（６）に、冷媒回収時、該油
冷却器（６）の滞留液冷媒を気化させるヒータ（８）を
付設したから、前記油冷却器（６）内に液冷媒か滞留し
ても、滞留する液冷媒を気化させられるので、前記冷媒
回路（５）を経て抽気装置（７）に容易に取り込んで、
該抽気装置（７）での再凝縮液化を促進でき、滞留冷媒
を容易に、かつ、短時間で回収できて、冷媒回収率の向
上及び回収時間の短縮化が図れるのである。(Effects of the Invention) As described above, in the present invention, since the oil cooler (6) is provided with the heater (8) for vaporizing the retained liquid refrigerant of the oil cooler (6) at the time of collecting the refrigerant, the oil cooler ( Even if the liquid refrigerant stays in 6), the staying liquid refrigerant can be vaporized, so that it can be easily taken into the extraction device (7) through the refrigerant circuit (5),
Recondensation and liquefaction in the bleeding device (7) can be promoted, the staying refrigerant can be easily and quickly recovered, and the refrigerant recovery rate can be improved and the recovery time can be shortened.
又、加えて、液溜室（９）にヒータ（10）を配設したか
ら、前記液溜室（９）での滞留液冷媒の蒸発気化も促進
でき、一層の冷媒回収率の向上及び回収時間の短縮化が
図れるのである。In addition, since the heater (10) is arranged in the liquid storage chamber (9), evaporation and evaporation of the stagnant liquid refrigerant in the liquid storage chamber (9) can be promoted, and the refrigerant recovery rate can be further improved and recovered. The time can be shortened.
図面は本発明ターボ冷凍機の一部を断面にした配管系統
図である。 （１）……ターボ圧縮機 （２）……凝縮器 （３）……膨張機構 （４）……蒸発器 （５）……冷媒回路 （６）……油冷却器 （７）……抽気装置 （８）……ヒータ （９）……液溜室 （10）……ヒータThe drawing is a piping system diagram in which a part of the turbo refrigerator according to the present invention is shown in cross section. (1) …… Turbo compressor (2) …… Condenser (3) …… Expansion mechanism (4) …… Evaporator (5) …… Refrigerant circuit (6) …… Oil cooler (7) …… Bleed air Device (8) …… Heater (9) …… Liquid reservoir (10) …… Heater
Claims (2)
機構（３）及び蒸発器（４）を順次接続して冷媒回路
（５）を構成し、前記圧縮機（１）の油を前記冷媒回路
（５）から取り込む液冷媒で冷却する油冷却器（６）を
設けると共に、前記冷媒回路（５）から取込むガスを液
化して液冷媒と不凝縮ガスとに分離した後、液冷媒を前
記冷媒回路（５）に戻す抽気装置（７）を設けたターボ
冷凍機において、前記油冷却器（６）に、前記冷媒回路
（５）の充填冷媒を外部に回収する冷媒回収時、前記油
冷却器（６）内の滞留液冷媒を気化させるヒータ（８）
を付設したことを特徴とするターボ冷凍機。1. A refrigerant circuit (5) is constructed by sequentially connecting a turbo compressor (1), a condenser (2), an expansion mechanism (3) and an evaporator (4) to the compressor (1). After the oil cooler (6) for cooling the oil with the liquid refrigerant taken in from the refrigerant circuit (5) is provided, the gas taken in from the refrigerant circuit (5) is liquefied and separated into the liquid refrigerant and the non-condensed gas. In a turbo refrigerator provided with an extraction device (7) for returning a liquid refrigerant to the refrigerant circuit (5), a refrigerant recovery for recovering the refrigerant filled in the refrigerant circuit (5) to the oil cooler (6) to the outside. At the time, a heater (8) for vaporizing the liquid refrigerant accumulated in the oil cooler (6)
A turbo chiller characterized by being attached.
で凝縮する液冷媒を溜める液溜室（９）を備え、この液
溜室（９）に、外部への冷媒回収時、該液溜室（９）の
滞留液冷媒を気化させるヒータ（10）を配設した請求項
１記載のターボ冷凍機。2. The condenser (2) is provided on the outlet side of the condenser (2).
A heater (10) is provided with a liquid storage chamber (9) for storing the liquid refrigerant that condenses in the liquid storage chamber (9), and vaporizes the retained liquid refrigerant in the liquid storage chamber (9) when recovering the refrigerant to the outside. The turbo refrigerator according to claim 1, further comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2109644A JPH0762577B2 (en) | 1990-04-24 | 1990-04-24 | Turbo refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2109644A JPH0762577B2 (en) | 1990-04-24 | 1990-04-24 | Turbo refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH046375A JPH046375A (en) | 1992-01-10 |
| JPH0762577B2 true JPH0762577B2 (en) | 1995-07-05 |
Family
ID=14515510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2109644A Expired - Fee Related JPH0762577B2 (en) | 1990-04-24 | 1990-04-24 | Turbo refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0762577B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6153906B2 (en) * | 2014-09-08 | 2017-06-28 | 株式会社日立ビルシステム | Refrigerant recovery device for turbo refrigerator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3699781A (en) * | 1971-08-27 | 1972-10-24 | Pennwalt Corp | Refrigerant recovery system |
-
1990
- 1990-04-24 JP JP2109644A patent/JPH0762577B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH046375A (en) | 1992-01-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |