JPH0593553A - Helium gas compression device - Google Patents
Helium gas compression deviceInfo
- Publication number
- JPH0593553A JPH0593553A JP25498891A JP25498891A JPH0593553A JP H0593553 A JPH0593553 A JP H0593553A JP 25498891 A JP25498891 A JP 25498891A JP 25498891 A JP25498891 A JP 25498891A JP H0593553 A JPH0593553 A JP H0593553A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- compressor
- valve
- compression device
- helium gas
- 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
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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
(57)【要約】
【構成】油分離器９と圧縮機４の吸入管３を連通する油
戻し管１２に設けた開閉弁１１を、圧縮機４の起動時に
開路し、かつ、運転中は一定時間間隔毎に規定時間開路
させる。
【効果】油分離器から圧縮機側への油戻しによる吐出ガ
ス流量の低下を最少にして効率の向上が図れ、圧縮機側
へ油を確実に戻すことができる。
(57) [Summary] [Construction] The opening / closing valve 11 provided in the oil return pipe 12 that connects the oil separator 9 and the suction pipe 3 of the compressor 4 is opened when the compressor 4 is started, and is in operation. The circuit is opened for a specified time at regular time intervals. [Effect] It is possible to minimize the decrease in the discharge gas flow rate due to the oil return from the oil separator to the compressor side, improve the efficiency, and reliably return the oil to the compressor side.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、油潤滑式や油冷却式の
ヘリウムガス圧縮装置に係り、特に、油分離器からの油
戻しによる吐出ガス流量の低下を防止するに好適なヘリ
ウムガス圧縮装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-lubricated or oil-cooled helium gas compression device, and particularly to a helium gas compression device suitable for preventing a decrease in discharge gas flow rate due to oil return from an oil separator. Regarding the device.
【０００２】[0002]
【従来の技術】従来の装置は、例えば、特開昭51−7361
3 号公報に開示されたように、圧縮機の吐出管の途中に
設けた油分離器で分離した油を、電磁弁を設けた油戻し
管を介して、圧縮機の吸入管または圧縮途中の圧縮室に
戻しており、電磁弁は圧縮機の運転中、常時、開路され
ていた。2. Description of the Related Art A conventional apparatus is disclosed in, for example, Japanese Patent Laid-Open No. 517361/1976.
As disclosed in Japanese Patent Publication No. 3, the oil separated by the oil separator provided in the middle of the discharge pipe of the compressor is passed through the oil return pipe provided with a solenoid valve to the suction pipe of the compressor or the middle of the compression process. It was returned to the compression chamber, and the solenoid valve was always open during the operation of the compressor.
【０００３】[0003]
【発明が解決しようとする課題】上記のように油戻し管
に設けた開閉弁を運転中、常時、開路させた従来技術で
は、吐出ガスの一部も油と共に油戻し管を介して圧縮機
側へ、常時、バイパスすることになり、ヘリウムガス圧
縮装置出口の吐出ガス流量が大幅に低下してしまい、ヘ
リウム冷凍機の冷凍能力が低下するという問題があっ
た。In the prior art in which the on-off valve provided in the oil return pipe is always opened during operation as described above, in the prior art, a part of the discharge gas is also discharged together with the oil through the oil return pipe. However, there is a problem in that the flow rate of the discharged gas at the outlet of the helium gas compression device is significantly reduced and the refrigerating capacity of the helium refrigerator is reduced.
【０００４】本発明の目的は、油戻しによる吐出ガス流
量の低下を最少にして効率向上を図り、油分離器で分離
した油を圧縮機側へ確実に戻して信頼性を確保すること
にある。An object of the present invention is to minimize the decrease in the discharge gas flow rate due to oil return to improve efficiency, and to reliably return the oil separated by the oil separator to the compressor side to ensure reliability. ..
【０００５】[0005]
【課題を解決するための手段】上記目的は、油戻し管に
設けた開閉弁を、圧縮機の起動時に開路し、かつ、運転
中は一定時間間隔毎に規定時間開路することにより達成
される。The above-mentioned object is achieved by opening the on-off valve provided in the oil return pipe when the compressor is started, and during operation for a specified time at regular time intervals. ..
【０００６】[0006]
【作用】油戻し管に設けた開閉弁を、運転中に一定時間
間隔毎に規定時間開路させることにより、油分離器で分
離された油を圧縮機側へ戻すことができる。開閉弁を開
路する規定時間の長さは、油分離器で分離された油の量
と油戻し管における流動抵抗によるが、ヘリウムガス圧
縮装置の場合、一時間毎に数十秒から数分程度の短時間
で十分油を圧縮機側へ戻すことができる。従って、従来
は運転中常時開路していた開閉弁の開路時間を大幅に短
縮することができるので、油戻し管を介して油と共に圧
縮機側へ戻る吐出ガスの流量を低減することができ、ヘ
リウムガス圧縮装置出口の吐出ガス流量の低下を最少に
することができる。The oil separated by the oil separator can be returned to the compressor side by opening the on-off valve provided in the oil return pipe for a prescribed time interval during operation. The length of the specified time for opening the on-off valve depends on the amount of oil separated by the oil separator and the flow resistance in the oil return pipe, but in the case of the helium gas compression device, it is about tens of seconds to several minutes per hour. The oil can be sufficiently returned to the compressor side in a short time. Therefore, since the opening time of the on-off valve that was normally open during operation can be greatly shortened, it is possible to reduce the flow rate of the discharge gas returning to the compressor side together with the oil via the oil return pipe. The decrease in the discharge gas flow rate at the outlet of the helium gas compression device can be minimized.
【０００７】ここで、油戻し管に設けた開閉弁が開路す
るまでの一定時間間隔より短い時間で圧縮機を停止させ
た場合、油分離器で分離された油は油分離器内に溜った
ままとなり、圧縮機側へ戻すことができなくなる。そこ
で本発明では、起動時に開閉弁が開路するように制御す
る。これにより、分離された油が油分離器内に溜ったま
まの状態で圧縮機を停止させた場合でも、次の起動時に
開閉弁が開路して、油を圧縮機側へ戻すことができる。Here, when the compressor is stopped in a time shorter than the constant time interval until the opening / closing valve provided in the oil return pipe opens, the oil separated by the oil separator accumulates in the oil separator. It remains as it is and cannot be returned to the compressor side. Therefore, in the present invention, the opening / closing valve is controlled to open at the time of startup. As a result, even when the compressor is stopped while the separated oil remains in the oil separator, the opening / closing valve is opened at the next start and the oil can be returned to the compressor side.
【０００８】[0008]
【実施例】以下、本発明の実施例を図１ないし図３によ
り説明する。Embodiments of the present invention will be described below with reference to FIGS.
【０００９】図１は本発明に係るヘリウムガス圧縮装置
の構成を示す系統図を示しており、ヘリウム冷凍機１に
高圧ヘリウムガスを供給するヘリウムガス圧縮装置２を
二点鎖線で示す。ヘリウムガス圧縮装置２を構成する機
器は、圧縮機４，ヘリウム冷凍機１から低圧ヘリウムガ
スを圧縮機４へ戻す吸入管３，冷却の目的で油冷却器５
により冷却した油を圧縮途中の圧縮室に圧力差を利用し
て強制注入する油注入回路６，圧縮機４からのヘリウム
冷凍機１へ高圧ガスを供給する吐出管７，吐出管７の途
中に設けられたガスクーラ８と油分離用フィルタ１０を
上部に備えた油分離器９，油分離器９で分離された油を
開閉弁１１を介して吸入管３へ戻す油戻し管１２であ
る。本実施例では、油戻し管１２は油分離器９と吸入管
３を連通している。図中、実線の矢印はガスの流れ、破
線の矢印は油の流れを示す。FIG. 1 is a system diagram showing the configuration of a helium gas compression device according to the present invention, and a helium gas compression device 2 for supplying high pressure helium gas to a helium refrigerator 1 is shown by a chain double-dashed line. The equipment constituting the helium gas compression device 2 includes a suction pipe 3 for returning low-pressure helium gas from the compressor 4, the helium refrigerator 1 to the compressor 4, and an oil cooler 5 for the purpose of cooling.
The oil injection circuit 6 for forcibly injecting the oil cooled by the above into the compression chamber in the middle of compression by using the pressure difference 6, the discharge pipe 7 for supplying the high pressure gas from the compressor 4 to the helium refrigerator 1, and the middle of the discharge pipe 7. An oil separator 9 provided with a gas cooler 8 and an oil separation filter 10 provided on the upper portion, and an oil return pipe 12 for returning the oil separated by the oil separator 9 to the suction pipe 3 via an on-off valve 11. In this embodiment, the oil return pipe 12 connects the oil separator 9 and the suction pipe 3. In the figure, the solid arrow indicates the flow of gas and the broken arrow indicates the flow of oil.
【００１０】次に本実施例の作用について説明する。ヘ
リウム冷凍機１から戻る低圧ヘリウムガスは圧縮機４で
圧縮され油を含んだ高温高圧のガスとなって吐出管７に
吐出され、吐出管７の途中のガスクーラ８で冷却され、
油分離器９のフィルタ１０を通る間に油を分離された
後、ヘリウム冷凍機１へ供給される。一方、油分離器９
で分離された油は油分離器９の底部に貯留され、開閉弁
１１を一定時間間隔毎に規定時間（例えば、一時間毎に
一分間）開路することにより、高低圧力差によって油戻
し管１２を通って吸入管３に流入する。このとき吐出ガ
スの一部も開閉弁１１を介して油と共に吸入管３へ流入
するが、従来の例では運転中常時開路していた開閉弁１
１の開路時間を大幅に短縮することができるので、油戻
し管１２を介して圧縮機側へ戻る吐出ガスの流量を低減
することができ、ヘリウムガス圧縮装置２の出口の吐出
ガス流量の低下を最少にすることができる。Next, the operation of this embodiment will be described. The low-pressure helium gas returned from the helium refrigerator 1 is compressed by the compressor 4 into a high-temperature and high-pressure gas containing oil, which is discharged to the discharge pipe 7 and cooled by the gas cooler 8 in the middle of the discharge pipe 7.
After the oil is separated while passing through the filter 10 of the oil separator 9, the oil is supplied to the helium refrigerator 1. On the other hand, the oil separator 9
The oil separated in (1) is stored in the bottom portion of the oil separator 9, and the open / close valve 11 is opened at regular time intervals for a specified time (for example, 1 minute per hour), whereby the oil return pipe 12 is opened due to the difference in pressure. And flows into the suction pipe 3 through. At this time, a part of the discharge gas also flows into the suction pipe 3 through the on-off valve 11 together with the oil. However, in the conventional example, the on-off valve 1 was normally open during operation.
Since the open circuit time of No. 1 can be greatly shortened, the flow rate of the discharge gas returning to the compressor side through the oil return pipe 12 can be reduced, and the discharge gas flow rate at the outlet of the helium gas compression device 2 can be reduced. Can be minimized.
【００１１】ここで、開閉弁１１が開路するまでの一定
時間間隔より短い時間で圧縮機４を停止させた場合、フ
ィルタ１０を通る間にガスから分離された油は油分離器
９の底部に溜ったままとなるが、本発明では、起動時に
開閉弁１１が開路するように制御するので、次の起動時
に、分離された油を確実に圧縮機側へ戻すことができ
る。Here, when the compressor 4 is stopped in a time shorter than the constant time interval until the opening / closing valve 11 opens, the oil separated from the gas while passing through the filter 10 is discharged to the bottom of the oil separator 9. In the present invention, the on-off valve 11 is controlled so as to be opened at the time of startup, so that the separated oil can be reliably returned to the compressor side at the next startup.
【００１２】図２は、図１の実施例における圧縮機４の
運転と開閉弁１１の開閉動作のタイムチャートを示す。
Ａ点で圧縮機を起動させると開閉弁１１は時間ｔ0 だけ
開路し、その後、一定時間間隔ｔ1(例えば一時間)毎に
規定時間ｔ2（例えば一分間）だけ開路する。本図の例
ではｔ0をｔ2に等しく設定しているが、ｔ0は任意に設
定してもよい。FIG. 2 shows a time chart of the operation of the compressor 4 and the opening / closing operation of the opening / closing valve 11 in the embodiment of FIG.
When the compressor is activated at point A, the on-off valve 11 opens for a time t 0 , and then opens for a specified time t 2 (for example, 1 minute) at regular time intervals t 1 (for example, 1 hour). In the example of this figure is set equal t 0 to t 2, t 0 may be set arbitrarily.
【００１３】Ａ点からＢ点に至る運転のように、圧縮機
４の運転時間ｔ3が一定時間間隔ｔ1より十分長い場合
（ｔ3＞ｔ0＋ｔ1）、ｔ1毎にｔ2 だけ開閉弁１１が開路
するので、油分離器９で分離された油を確実に圧縮機側
へ戻すことができる。Ｃ点からＤ点に至る運転のよう
に、圧縮機４の運転時間ｔ4がｔ1より短い場合でも、Ｅ
点で示す次の起動時に開閉弁１１が時間ｔ0 だけ開路す
るので油を確実に圧縮機側へ戻すことができる。When the operation time t 3 of the compressor 4 is sufficiently longer than the constant time interval t 1 (t 3 > t 0 + t 1 ), such as the operation from the point A to the point B, only t 2 at every t 1. Since the on-off valve 11 opens, the oil separated by the oil separator 9 can be reliably returned to the compressor side. Even when the operating time t 4 of the compressor 4 is shorter than t 1 as in the operation from the point C to the point D,
Since the on-off valve 11 is opened for the time t 0 at the next startup indicated by a dot, the oil can be reliably returned to the compressor side.
【００１４】参考として、図２に示す実施例と異なり、
運転中一定時間間隔ｔ1 毎に規定時間ｔ2 だけ開閉弁１
１を開路するが、起動時には開閉弁１１を開路しない例
を図４に示す。この場合、Ｐ点からＱ点に至る運転のよ
うに、圧縮機４の運転時間ｔ3がｔ1より長い場合は、図
２の実施例と同様に、油分離器９で分離された油を確実
に圧縮機側へ戻すことができる。しかし、Ｒ点からＳ
点、あるいは、Ｔ点からＵ点に至る運転のように、圧縮
機の運転時間ｔ4，ｔ5がｔ1 より短い場合は開閉弁１１
が開路されないので、油を圧縮機側へ戻すことができ
ず、圧縮機４内の油が減少し圧縮機軸受の潤滑や油注入
による冷却に支障をきたすという問題が生じる。これに
対し、図２の実施例は、起動時に開閉弁を開路するとい
う簡単な制御により、このような問題を防止し、油を確
実に圧縮機側へ戻すことができる。As a reference, unlike the embodiment shown in FIG.
Open / close valve 1 for a specified time t 2 at every constant time interval t 1 during operation
FIG. 4 shows an example in which 1 is opened, but the opening / closing valve 11 is not opened at the time of startup. In this case, when the operation time t 3 of the compressor 4 is longer than t 1 as in the operation from the point P to the point Q, the oil separated by the oil separator 9 is removed as in the embodiment of FIG. It can be surely returned to the compressor side. However, from point R to S
Point, or the on-off valve 11 when the compressor operating times t 4 and t 5 are shorter than t 1 as in the operation from point T to point U
Since the oil is not opened, the oil cannot be returned to the compressor side, and the oil in the compressor 4 is reduced, which causes a problem that lubrication of the compressor bearing and cooling due to oil injection are hindered. On the other hand, in the embodiment of FIG. 2, such a problem can be prevented and the oil can be reliably returned to the compressor side by the simple control of opening the open / close valve at the time of startup.
【００１５】尚、図１の実施例では、油戻し管１２の一
端を吸入管３に連通させたが、圧縮途中の圧縮室、また
は、図１において油冷却器５出口側に連通する油注入回
路６に連通させても、本発明により前述と同様の効果を
達成できる。In the embodiment shown in FIG. 1, one end of the oil return pipe 12 is communicated with the suction pipe 3, but oil injection communicating with the compression chamber in the middle of compression or the outlet side of the oil cooler 5 in FIG. Even when the circuit 6 is connected to the circuit 6, the same effects as described above can be achieved by the present invention.
【００１６】また、前述の実施例では、油戻し管１２に
は開閉弁１１を設けたが、キャピラリチューブなどの絞
り機構と開閉弁１１とを直列に設けても、本発明により
前述と同様の効果を達成することができる。In the above-described embodiment, the oil return pipe 12 is provided with the on-off valve 11. However, even if the throttle mechanism such as a capillary tube and the on-off valve 11 are provided in series, the same operation as described above is performed by the present invention. The effect can be achieved.
【００１７】図３は本発明の他の実施例を示したもの
で、図１と異なるのは、吐出管７の途中に、油分離器を
複数個（二台）設けた点である。油分離器９ａ，９ｂ
は、上部にフィルタ１０ａ,１０ｂを備え、油戻し管１
２ａ,１２ｂにより、開閉弁１１ａ，１１ｂを介して吸
入管３と各々連通している。本実施例でも、開閉弁１１
ａ，１１ｂを起動時に開き、かつ、運転中は一定時間間
隔毎に規定時間開くことにより、油戻し管１２ａ，１２
ｂを介して油と共に圧縮機側へ戻る吐出ガスの流量を低
減し、ヘリウムガス圧縮装置２出口の吐出ガス流量の低
下を最少にすることができ、かつ、油分離器９ａ，９ｂ
で分離された油を確実に圧縮機側へ戻すことができる。FIG. 3 shows another embodiment of the present invention, which is different from FIG. 1 in that a plurality of (two) oil separators are provided in the middle of the discharge pipe 7. Oil separator 9a, 9b
Is equipped with filters 10a and 10b on the upper side, and the oil return pipe 1
2a and 12b communicate with the suction pipe 3 via the on-off valves 11a and 11b, respectively. Also in this embodiment, the on-off valve 11
The oil return pipes 12a, 12b are opened by opening a, 11b at the time of startup and by opening for a specified time at regular time intervals during operation.
The flow rate of the discharge gas returning to the compressor side together with the oil via b can be reduced, and the decrease in the discharge gas flow rate at the outlet of the helium gas compression device 2 can be minimized, and the oil separators 9a and 9b can be reduced.
The oil separated by can be surely returned to the compressor side.
【００１８】[0018]
【発明の効果】本発明によれば、油分離器と圧縮機の吸
入管または圧縮途中の圧縮室とを連通させる油戻し管に
設けた開閉弁を、圧縮機の起動時に開路し、かつ運転中
は一定時間間隔毎に規定時間開路するように制御すると
いう簡単な方法により、油戻し管を介して圧縮機側へ戻
る吐出ガスの流量を低減し、ヘリウムガス圧縮装置出口
での吐出ガス流量の低下を最少にして効率向上を図るこ
とができ、油分離器で分離された油を圧縮機側へ確実に
戻すことができる。According to the present invention, the opening / closing valve provided in the oil return pipe that connects the oil separator to the suction pipe of the compressor or the compression chamber in the middle of compression is opened and started when the compressor is started. The flow rate of the discharge gas returning to the compressor side via the oil return pipe is reduced by a simple method of controlling the circuit to open for a specified time at fixed time intervals, and the discharge gas flow rate at the helium gas compression device outlet is reduced. Can be minimized to improve efficiency, and the oil separated by the oil separator can be reliably returned to the compressor side.
【図１】本発明の実施例に係るヘリウムガス圧縮装置の
構成を示す系統図。FIG. 1 is a system diagram showing a configuration of a helium gas compression device according to an embodiment of the present invention.
【図２】図１の実施例におけるタイムチャート。FIG. 2 is a time chart in the embodiment of FIG.
【図３】本発明の他の実施例を示すヘリウムガス圧縮装
置の系統図。FIG. 3 is a system diagram of a helium gas compression device showing another embodiment of the present invention.
【図４】起動時開閉弁閉の場合のタイムチャート。FIG. 4 is a time chart when the on-off valve is closed at startup.
２…ヘリウムガス圧縮装置、３…吸入管、４…圧縮機、
７…吐出管、９…油分離器、１１，１１ａ，１１ｂ…開
閉弁、１２，１２ａ，１２ｂ…油戻し管。2 ... Helium gas compression device, 3 ... suction pipe, 4 ... compressor,
7 ... Discharge pipe, 9 ... Oil separator, 11, 11a, 11b ... Open / close valve, 12, 12a, 12b ... Oil return pipe.
Claims (1)
の途中に設けた油分離器と、開閉弁を介して前記油分離
器と前記圧縮機の吸入管または圧縮途中の圧縮室とを連
通する油戻し管をもったヘリウムガス圧縮装置におい
て、前記油戻し管に設けた前記開閉弁を、起動時に開路
し、かつ、運転中は一定時間間隔毎に規定時間開路する
ことを特徴とするヘリウムガス圧縮装置。1. An oil-lubricated compressor, an oil separator provided in the middle of a discharge pipe of the compressor, and an intake pipe of the compressor and a compressor in the middle of compression via an on-off valve. In a helium gas compression device having an oil return pipe communicating with the chamber, the opening / closing valve provided in the oil return pipe is opened at the time of startup, and is opened for a specified time at regular time intervals during operation. Characteristic helium gas compression device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25498891A JPH0593553A (en) | 1991-10-02 | 1991-10-02 | Helium gas compression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25498891A JPH0593553A (en) | 1991-10-02 | 1991-10-02 | Helium gas compression device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0593553A true JPH0593553A (en) | 1993-04-16 |
Family
ID=17272652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25498891A Pending JPH0593553A (en) | 1991-10-02 | 1991-10-02 | Helium gas compression device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0593553A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012211763A (en) * | 2007-03-27 | 2012-11-01 | Daikin Industries Ltd | Refrigerating device |
| JP2018004220A (en) * | 2016-07-07 | 2018-01-11 | 三菱重工サーマルシステムズ株式会社 | Refrigerator |
| EP2561170A4 (en) * | 2010-04-20 | 2018-06-27 | Sandvik Intellectual Property AB | Air compressor system and method of operation |
| JP2021148348A (en) * | 2020-03-18 | 2021-09-27 | 株式会社富士通ゼネラル | Air conditioning device |
-
1991
- 1991-10-02 JP JP25498891A patent/JPH0593553A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012211763A (en) * | 2007-03-27 | 2012-11-01 | Daikin Industries Ltd | Refrigerating device |
| EP2561170A4 (en) * | 2010-04-20 | 2018-06-27 | Sandvik Intellectual Property AB | Air compressor system and method of operation |
| JP2018004220A (en) * | 2016-07-07 | 2018-01-11 | 三菱重工サーマルシステムズ株式会社 | Refrigerator |
| JP2021148348A (en) * | 2020-03-18 | 2021-09-27 | 株式会社富士通ゼネラル | Air conditioning device |
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