JPH0484083A - Screw refrigerator unit - Google Patents

Screw refrigerator unit

Info

Publication number
JPH0484083A
JPH0484083A JP19494390A JP19494390A JPH0484083A JP H0484083 A JPH0484083 A JP H0484083A JP 19494390 A JP19494390 A JP 19494390A JP 19494390 A JP19494390 A JP 19494390A JP H0484083 A JPH0484083 A JP H0484083A
Authority
JP
Japan
Prior art keywords
oil
gas
compressor
pipe
separator
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
Application number
JP19494390A
Other languages
Japanese (ja)
Inventor
Naohiro Yanagisawa
柳沢　直宏
Ryoji Sumita
住田　了志
Tadashi Hozumi
穂積　正
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Hitachi Shimizu Engineering Co Ltd
Original Assignee
Hitachi Ltd
Hitachi Shimizu Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, Hitachi Shimizu Engineering Co Ltd filed Critical Hitachi Ltd
Priority to JP19494390A priority Critical patent/JPH0484083A/en
Publication of JPH0484083A publication Critical patent/JPH0484083A/en
Pending legal-status Critical Current

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)

Abstract

PURPOSE:To make a small-sized oil separator and assure an oil separating performance by a method wherein when a concurrent operation of two compressors having a maximum oil circulation volume is carried out, a gas extracting solenoid valve is opened in cooperation with an operation of the second compressor, gas is extracted from an oil tank and then a feeding-out of the oil from the oil separator to the oil tank is promoted. CONSTITUTION:Gas passed through a suction strainer device 1 and sucked into No.1 compressor 2 and No.2 compressor 3 is compressed, passed through a collecting pipe 6 via discharging pipes 4 and 5, enters an oil separator 7, passes through an oil separator 8 and then the gas is discharged from a discharging pipe 9 to a condensor 10. In turn, oil 11 contained in the gas is separated while passing through the oil separator 8, the oil is passed through an oil pipe 12 and then accumulated in an oil tank 13. The oil 11 passes through an oil pipe 14, flows into an oil cooler 15. The oil is cooled, passes through an oil strainer 17 and the oil is supplied to compressors 2 and 3 through an oil supplying solenoid valve 18. Operation of a gas extracting solenoid valve 23 is carried out such that it is closed when only the first compressor 2 is operated and in turn it is opened when the second compressor 3 is operated. Gas at a gaseous phase part 20 in the oil tank 13 passes through a gas extracting pipe 22 and then extracted to a suction side through a suction side coupling 21.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はスクリュー圧縮機二台に対し、油分離器−基と
油タンク、油冷却器を配設した差圧給油方式のマルチタ
イプスクリュー冷凍機ユニットに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a multi-type screw refrigeration system using a differential pressure oil supply system in which an oil separator base, an oil tank, and an oil cooler are arranged for two screw compressors. Regarding machine units.

〔従来の技術〕[Conventional technology]

従来のスクリュー冷凍機ユニットは、実開昭５０−９３
８５６号公報に記載のように、油ポンプによる強制給油
方式で、油ポンプによる油導出方法について述べている
が、吐出圧力と低圧側（中間圧力或いは吸入圧力）の差
圧給油方式を採用したスクリュー冷凍機のマルチタイプ
のユニットについては述べられていない。The conventional screw refrigerator unit was developed in 1988-1993.
As described in Publication No. 856, it describes a forced lubrication system using an oil pump and an oil delivery method using an oil pump. There is no mention of multi-type refrigerator units.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

本発明の目的は、吐出圧力と低圧側（中間圧力或いは吸
入圧力）の差圧給油方式のスクリュー圧縮機二台と一基
の油分離器を搭載したマルチタイプスクリュー冷凍機ユ
ニットにおいて、油分離器の小形化と圧・縮機二台同時
運転時における油分離性能の向上を図ることにある。The object of the present invention is to provide an oil separator in a multi-type screw refrigerator unit equipped with two screw compressors of differential pressure oil supply system between discharge pressure and low pressure side (intermediate pressure or suction pressure) and one oil separator. The aim is to reduce the size of the compressor and improve oil separation performance when two compressors are operated simultaneously.

〔課題を解決するための手段〕[Means to solve the problem]

上記の目的を達成するため、本発明は油循環量が最大と
なる圧縮機二台の同時運転時に、第二圧縮機の運転と連
動させて抽気用電磁弁を開き、油タンクからガスを抽気
することにより、油分離器から油タンクへの油の導出を
促進させることを特徴とする。In order to achieve the above object, the present invention opens the solenoid valve for extraction in conjunction with the operation of the second compressor when the two compressors are operated simultaneously to maximize the amount of oil circulation, thereby extracting gas from the oil tank. By doing so, the extraction of oil from the oil separator to the oil tank is promoted.

〔作用〕[Effect]

油タンクの抽気による油分離器の油導出は、油循環量が
最大となる圧縮機二台同時運転時に抽気用電磁弁を＆２
圧縮機の運転と連動させることにある。To extract oil from the oil separator using air bleed from the oil tank, use the bleed solenoid valve
The purpose is to link it with the operation of the compressor.

〔実施例〕〔Example〕

第１図は本発明の一実施例による二台のマルチタイプス
クリュー冷凍機ユニットのサイクル系統図を示す。FIG. 1 shows a cycle diagram of two multi-type screw refrigerator units according to an embodiment of the present invention.

吸入ストレーナ１を通過してＮ１１ｌ圧縮機２．Ｎａ２
圧縮機３に吸入されたガスは圧縮されて吐出管４、吐出
管５により集合管６を経て油分離器７に入り、油分離装
置８を通過して吐出管９から凝縮器１０へ吐出される。Pass through suction strainer 1 to N11l compressor 2. Na2
The gas sucked into the compressor 3 is compressed and enters the oil separator 7 via the discharge pipe 4 and discharge pipe 5 through the collector pipe 6, passes through the oil separator 8, and is discharged from the discharge pipe 9 to the condenser 10. Ru.

一方、ガス中に含まれている油１１は油分離装置８を通
過する際に分離されて油管１２を経て油タンク１３へ溜
る。油タンク１３の油１１は油管１４を経て油冷却器１
５へ流入し、冷却されて給油管１６により油ストレーナ
１７を通過して給油電磁弁１８を介して給油接手１９か
ら第一圧縮機２、第二圧縮機３へ給油される。On the other hand, the oil 11 contained in the gas is separated when passing through the oil separator 8, passes through the oil pipe 12, and accumulates in the oil tank 13. The oil 11 in the oil tank 13 passes through the oil pipe 14 to the oil cooler 1.
5, is cooled, passes through an oil strainer 17 via an oil supply pipe 16, and is supplied to the first compressor 2 and the second compressor 3 from an oil supply fitting 19 via an oil supply solenoid valve 18.

圧縮機への給油方式は吐出圧力相当の高圧力の油を吸入
圧力（或いは中間圧力）に位置した低圧側の給油口へ導
入させる差圧給油方式を採用している。The compressor is supplied with oil using a differential pressure oil supply method in which high-pressure oil corresponding to the discharge pressure is introduced into a low-pressure oil supply port located at suction pressure (or intermediate pressure).

油タンク１３の気相部２０と吸入側接手２１を連結した
抽気管２２に配設した抽気用電磁弁２３の作動は、第一
圧縮機２のみの運転時は閉じ、第二の圧縮機３の運転と
連動して開き、油タンク１３の気相部２０のガスは抽気
管２２を通って吸入側接手２１より吸入側へ抽気される
。The bleed solenoid valve 23 installed in the bleed pipe 22 connecting the gas phase part 20 of the oil tank 13 and the suction side joint 21 is closed when only the first compressor 2 is in operation, and closed when the second compressor 3 is in operation. The gas in the gas phase section 20 of the oil tank 13 passes through the bleed pipe 22 and is bleed to the suction side from the suction side joint 21.

本実施例によれば、油循環量が最大となる圧縮機二台同
時運転時における油分離器内に滞溜する分離された油を
油タンクの抽気作用により、油タンクへの油の導出を促
進させ、油分離器の小形化と油分離性能を確保すること
ができる。According to this embodiment, when two compressors are operated at the same time when the oil circulation amount is maximum, the separated oil accumulated in the oil separator is removed to the oil tank by the bleed action of the oil tank. This makes it possible to downsize the oil separator and ensure oil separation performance.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、 （１）油分離器の小形化を図ることができ安価な製品を
提供することができる。According to the present invention, (1) The oil separator can be downsized and an inexpensive product can be provided.

（２）圧縮機二台同時運転時にも、油分離性能を確保す
ることができ、給油不良、油上りなど不安定な運転を防
止して円滑な給油作用をさせることができる。(2) Even when two compressors are operated simultaneously, oil separation performance can be ensured, and unstable operation such as poor lubrication or oil swell can be prevented and smooth lubrication can be achieved.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の二台マルチタイプスクリュー冷凍機ユ
ニットのサイクル系統図を示す。 ２・・・第一圧縮機、３・・・第二圧縮機、６・・・集
合管、７・・・油分離器、１０・・・凝縮器、１３・・
・油タンク。 １５・・・油冷却器、２１・・・吸入側接手、２２・・
・抽気第ｔｒｉＪFIG. 1 shows a cycle system diagram of a two-unit multi-type screw refrigerator unit of the present invention. 2... First compressor, 3... Second compressor, 6... Collecting pipe, 7... Oil separator, 10... Condenser, 13...
・Oil tank. 15... Oil cooler, 21... Suction side joint, 22...
・Extraction triJ

Claims (1)

【特許請求の範囲】 １、油分離器により分離し油タンクへ導出した油を油冷
却器で冷却し、油ストレーナを介して給油管によりスク
リュー圧縮機のロータ、軸受の摺動部へ給油する油循環
系統に吐出圧力と低圧側の差圧給油方式を採用したマル
チタイプスクリュー冷凍機ユニットにおいて、 前記油タンクの気相部と前記スクリュー圧縮機の低圧側
を抽気用電磁弁を介して抽気管で連結し、油循環量が最
大となる前記スクリュー圧縮機の二台を同時運転時に前
記一方のスクリュー圧縮機の運転と連動させて抽気用電
磁弁と開き、前記油タンクからガスを抽気し、前記油分
離器から前記油タンクへの油の導出性を促進させること
を特徴とするスクリュー冷凍機ユニット。[Claims] 1. The oil separated by an oil separator and led to an oil tank is cooled by an oil cooler, and is supplied to the rotor of the screw compressor and the sliding parts of the bearings through an oil supply pipe through an oil strainer. In a multi-type screw refrigerator unit that employs a differential pressure oil supply system between the discharge pressure and the low pressure side in the oil circulation system, an air bleed pipe is connected between the gas phase part of the oil tank and the low pressure side of the screw compressor through an air bleed solenoid valve. When the two screw compressors are connected to each other so as to maximize the oil circulation amount, a solenoid valve for bleed is opened in conjunction with the operation of one of the screw compressors when the two screw compressors are connected at the same time to maximize the amount of oil circulation, and gas is bleed from the oil tank. A screw refrigerating machine unit, characterized in that it facilitates the extraction of oil from the oil separator to the oil tank.
JP19494390A 1990-07-25 1990-07-25 Screw refrigerator unit Pending JPH0484083A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19494390A JPH0484083A (en) 1990-07-25 1990-07-25 Screw refrigerator unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19494390A JPH0484083A (en) 1990-07-25 1990-07-25 Screw refrigerator unit

Publications (1)

Publication Number Publication Date
JPH0484083A true JPH0484083A (en) 1992-03-17

Family

ID=16332913

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19494390A Pending JPH0484083A (en) 1990-07-25 1990-07-25 Screw refrigerator unit

Country Status (1)

Country Link
JP (1) JPH0484083A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015512501A (en) * 2012-03-29 2015-04-27 ジョンソン コントロールズ テクノロジー カンパニーＪｏｈｎｓｏｎ Ｃｏｎｔｒｏｌｓ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏｍｐａｎｙ Chiller or heat pump with falling film evaporator and horizontal oil separator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015512501A (en) * 2012-03-29 2015-04-27 ジョンソン コントロールズ テクノロジー カンパニーＪｏｈｎｓｏｎ Ｃｏｎｔｒｏｌｓ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏｍｐａｎｙ Chiller or heat pump with falling film evaporator and horizontal oil separator

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