JPH0412187A - Cooling device for scroll compressor - Google Patents

Cooling device for scroll compressor

Info

Publication number
JPH0412187A
JPH0412187A JP11638690A JP11638690A JPH0412187A JP H0412187 A JPH0412187 A JP H0412187A JP 11638690 A JP11638690 A JP 11638690A JP 11638690 A JP11638690 A JP 11638690A JP H0412187 A JPH0412187 A JP H0412187A
Authority
JP
Japan
Prior art keywords
oil
compression element
separator
casing
passage
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
JP11638690A
Other languages
Japanese (ja)
Inventor
Junichiro Koiwa
小岩 純一郎
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries 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 Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP11638690A priority Critical patent/JPH0412187A/en
Publication of JPH0412187A publication Critical patent/JPH0412187A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0007Injection of a fluid in the working chamber for sealing, cooling and lubricating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02Lubrication; Lubricant separation
    • F04C29/025Lubrication; Lubricant separation using a lubricant pump

Abstract

PURPOSE:To stably cool discharge gas by connecting the discharge side of an oil pump communicating to an oil reservoir provided under a motor to an oil feed port of a compression element, providing an oil separator on the discharge line of the compression element, and connecting an oil return passage communicating to the oil reservoir to the oil separator. CONSTITUTION:A compression element 2 composed of a fixed scroll 21 and a movable scroll 22 is arranged on the upper part inside a closed casing 1, and a motor 4 having a driving shaft 41 connected with the movable scroll 22 on the lower part inside the casing. In such low pressure dome type scroll compressor, an oil reservoir la is formed on the bottom part inside the casing 1, and an oil pump 6 communicating to the oil reservoir la is arranged on the lower part side of the driving shaft 41 inside a supporting member 5. A plurality of oil feed ports 23 are formed on the fixed scroll 21, and they are connected to the discharge side of the oil pump 6 through an oil injection passage 13. An oil separator 7 is mounted on a discharge line 12 connected to the casing 1, and an oil return passage 14 communicating to the oil reservoir la through a suction pipe 11 is connected to the liquid territory of the oil separator 7.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、ヘリウムガスなどを圧縮するために使用する
スクロール圧縮機の冷却装置に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cooling device for a scroll compressor used to compress helium gas or the like.

(従来の技術) 従来、この種スクロール圧縮機の冷却装置は、例えば、
実開昭56−85087号公報に記載され、かつ、第8
図に示したように、固定及び可動スクロール(A)(B
)を備えた圧縮要素(C)の吐出ポー) (a)に、凝
縮器や蒸発器などに至る吐出ライン(D)を接続して、
この吐出ライン(D)に油分離器(E)を介装させると
共に、該分離器(E)と前記圧縮要素(C)における圧
縮途中の圧縮室内に設けた複数の油注入口(b)との間
に油注入通路(F)を接続し、高低差圧を利用して、前
記油分離器(E)で分離された油を前記注入通路(F)
を介して前記各注入口(b)から圧縮要素(C)内へと
インジェクションすることにより、この圧縮要素(C)
内で圧縮される吐出ガスを冷却するようにしている。
(Prior Art) Conventionally, a cooling device for this type of scroll compressor is, for example,
It is described in Utility Model Application Publication No. 56-85087, and
As shown in the figure, fixed and movable scrolls (A) (B
) A discharge line (D) leading to a condenser, evaporator, etc. is connected to the discharge port (a) of the compression element (C) equipped with
An oil separator (E) is interposed in this discharge line (D), and a plurality of oil inlets (b) are provided in the compression chamber of the compression element (C) during compression. An oil injection passage (F) is connected between the two, and the oil separated by the oil separator (E) is transferred to the injection passage (F) using the pressure difference between high and low levels.
The compression element (C) is injected into the compression element (C) from each injection port (b) through the
It is designed to cool the discharged gas compressed inside.

(発明が解決しようとする課題) 所が、以上のような冷却装置を低圧ドーム形スクロール
圧縮機に採用するときには、前記圧縮要素(C)にイン
ジェクションされた油の一部が低圧となっているケーシ
ングに漏れて底部の油溜へと回収されるのである。この
ため、最終的には前記油分離器(E)内の油がなくなっ
てしまい、該分離器(E)から前記圧縮要素(C)内へ
の油インジェクションが行えなくなって、吐出ガスの冷
却ができなくなる問題があった。
(Problem to be Solved by the Invention) However, when the above-described cooling device is employed in a low-pressure dome scroll compressor, a portion of the oil injected into the compression element (C) is at a low pressure. It leaks into the casing and is collected in the oil sump at the bottom. Therefore, the oil in the oil separator (E) eventually runs out, making it impossible to inject oil from the separator (E) into the compression element (C), making it impossible to cool the discharged gas. There was a problem that made it impossible.

本発明は以上のような問題に鑑みてなしたもので、その
目的は、圧縮要素にインジェクションする油が常に確保
できて、安定したガス冷却を行うことができるスクロー
ル圧縮機の冷却装置を提供することにある。
The present invention was made in view of the above-mentioned problems, and its purpose is to provide a cooling device for a scroll compressor that can always secure oil to be injected into the compression element and perform stable gas cooling. There is a particular thing.

(課題を解決するための手段) 上記目的を達成するため、本発明は、一対のスクロール
(21)(22)をもつ圧縮要素(2)とモータ(4)
とをケーシング(1)に内装し、該ケーシング(1)内
に吸入管(工1)を開口させたスクロール圧縮機の冷却
装置において、前記ケーシング(1)の下部に油溜(1
a)を設けると共に、前記モータ(4)の下部に、前記
油溜(1a)に連通する油ポンプ(6)を設けて、この
油ポンプ(6)の吐出側を前記圧縮要素(2)の油注入
口(23)に接続する一方、前記圧縮要素(2)の吐出
ライン(12)に油分離器(7)を設けて、この油分離
器(7)に前記油溜(1a)に連通ずる油戻り通路(1
4)を接続したことを特徴とするものである。
(Means for Solving the Problem) In order to achieve the above object, the present invention provides a compression element (2) having a pair of scrolls (21) (22) and a motor (4).
In a cooling device for a scroll compressor, an oil reservoir (1) is installed in a lower part of the casing (1), and a suction pipe (1) is opened in the casing (1).
a), and an oil pump (6) communicating with the oil sump (1a) is provided below the motor (4), and the discharge side of the oil pump (6) is connected to the compression element (2). While connected to the oil inlet (23), an oil separator (7) is provided in the discharge line (12) of the compression element (2), and the oil separator (7) is connected to the oil sump (1a). The oil return passage (1
4) is connected.

また、前記油戻り通路(14)に、該通路(14)から
の戻り油量を、前記油ポンプ(6)からの給油量より少
なくする油量調整手段(8)を設けると共に、前記油分
離器(7)における曲面高さが所定以上のとき、前記油
量調整手段(8)を側路して前記油溜(1a)に連通ず
るバイパス路(17)を設けてもよい。
Further, the oil return passage (14) is provided with an oil amount adjusting means (8) for making the amount of oil returned from the passage (14) smaller than the amount of oil supplied from the oil pump (6), and the oil separation means When the curved surface height of the vessel (7) is above a predetermined value, a bypass passage (17) may be provided that bypasses the oil amount adjusting means (8) and communicates with the oil reservoir (1a).

更に、前記油分離器(7)には、前記圧縮要素(2)の
油注入口(23)に接続される油注入通路(18)を設
けてもよい。
Furthermore, the oil separator (7) may be provided with an oil injection passage (18) connected to the oil injection port (23) of the compression element (2).

(作用) 前記圧縮要素(2)の回転駆動時には、前記油ポンプ(
6)により前記ケーシング(1)の油溜(1a)から油
が汲上げられて、この汲上げ油が前記油注入口(23)
から圧縮要素(2)内へとインジェクションされるため
に、ケーシング(1)内にインジェクション油が漏れて
も前記圧縮要素(2)へのインジェクション油を確保で
きるのであり、また、前記油分離器(7)での分離油は
、前記油戻り通路(14)を介して前記油溜(1a)側
に戻されるため、前記圧縮要素(2)側への油のインジ
ェクション油が常に確保でき安定したガス冷却が行われ
る。
(Function) When the compression element (2) is driven to rotate, the oil pump (
6), oil is pumped up from the oil sump (1a) of the casing (1), and this pumped oil is fed to the oil inlet (23).
Since the injection oil is injected into the compression element (2) from the oil separator ( Since the separated oil in step 7) is returned to the oil reservoir (1a) side via the oil return passage (14), oil injection to the compression element (2) side can always be ensured, resulting in stable gas flow. Cooling takes place.

また、前記油戻り通路(14)に、該通路(14)から
の戻り油量を、前記油ポンプ(6)からの給油量より少
なくする油量調整手段(8)を設けると共に、前記油分
離器(7)における油面高さが所定以上のとき、前記油
量調整手段(8)を側路して前記油溜(1a)に連通ず
るバイパス路(17)を設けるときには、前記調整手段
(8)による戻り油量の調整により、前記分離器(7)
内に常に所定油量が確保され、該分離器(7)を介して
前記ケーシング(1)へのガス漏れを起こしたりするこ
とがなく、又、前記油溜(1a)側での油量確保もでき
て効果的なガス冷却が行われるのである。
Further, the oil return passage (14) is provided with an oil amount adjusting means (8) for making the amount of oil returned from the passage (14) smaller than the amount of oil supplied from the oil pump (6), and the oil separation means When the oil level height in the container (7) is above a predetermined value, when providing a bypass passage (17) that bypasses the oil amount adjusting means (8) and communicates with the oil sump (1a), the adjusting means ( By adjusting the amount of return oil according to step 8), the separator (7)
A predetermined amount of oil is always ensured in the oil sump (1a), and no gas leaks to the casing (1) through the separator (7), and the amount of oil is ensured on the oil sump (1a) side. This allows for effective gas cooling.

更には、前記油分離器(7)に、前記圧縮要素(2)の
油注入口(23)に接続する油注入通路(18)を設け
るときには、前記圧縮要素(2)への油のインジェクシ
ョンが一層確実に安定して行われる。
Furthermore, when the oil separator (7) is provided with an oil injection passageway (18) connected to the oil injection port (23) of the compression element (2), oil injection into the compression element (2) is prevented. This will be done more reliably and stably.

(実施例) 第1図は低圧ドーム形スクロール圧縮機を示しており、
密閉ケーシング(1)の内方上部に、固定スクロール(
21)と可動スクロール(22)とから成る圧縮要素(
2)を架構(3)を介して支持すると共に、前記ケーシ
ング(1)の内方下部側に、前記可動スクロール(22
)に連動連結される駆動軸(41)をもったモータ(4
)を配設し、このモータ(4)の駆動に伴う駆動軸(4
1)の回転で、前記可動スクロール(22)を固定スク
ロール(21)に対し公転駆動させることにより、前記
ケーシング(1)の胴部に接続した吸入管(11)から
導入されるヘリウムなどのガスを、前記各スクロール(
21)(22)間で圧縮して、高圧ガスを前記固定スク
ロール(21)の上部空間に接続した吐出ライン(12
)から凝縮器や蒸発器(何れも図示せず)に吐出させる
ようにしている。同図中、(5)は前記ケーシング(1
)の下部側に設けられた前記駆動軸(41)の支持部材
である。
(Example) Figure 1 shows a low pressure dome scroll compressor.
A fixed scroll (
21) and a movable scroll (22).
2) is supported via a frame (3), and the movable scroll (22
) has a drive shaft (41) interlocked with the motor (4).
) is provided, and a drive shaft (4) accompanying the drive of this motor (4) is provided.
1) causes the movable scroll (22) to revolve around the fixed scroll (21), thereby causing gas such as helium to be introduced from the suction pipe (11) connected to the body of the casing (1). , each scroll (
21) and (22), the high pressure gas is connected to the upper space of the fixed scroll (21).
) to a condenser or evaporator (none of which are shown). In the same figure, (5) is the casing (1
) is a support member for the drive shaft (41) provided on the lower side of the drive shaft (41).

しかして、以上のような低圧ドーム形スクロール圧縮機
の冷却装置を、次のように構成したのである。
Therefore, the cooling device for the low-pressure dome scroll compressor as described above was constructed as follows.

即ち、前記ケーシング(1)の内方底部に油溜(1a)
を形成して、前記支持部材(5)の内部で駆動軸(41
)の下部側に、前記油溜(1a)に連通ずる定容積式の
油ポンプ(6)を配設すると共に、前記固定スクロール
(21)に、各スクロール(21)(22)間の圧縮室
に開口される複数の油注入口(23)を形成して、該6
注入口(23)と前記油ポンプ(6)の吐出側との間に
油インジェクシeン通路(13)を設ける。そして、前
記圧縮要素(2)の回転駆動時に、前記駆動軸(41)
による前記油ポンプ(6)の作動により、前記ケーシン
グ(1)の油溜(1a)から油を汲上げて、この汲上げ
油を、同図の実線矢印で示したように、前記インジェク
シaン通路(13)を介して前記各注入口(23)から
圧縮要素(2)の圧縮室内へとインジェクションさせて
、吐出ガスを冷却するのである。尚、前記油ポンプ(7
)で汲上げられた油は、前記駆動軸(41)の内部に設
けた油通路(図示せず)から各潤滑部位に給油可能とし
ている。
That is, there is an oil reservoir (1a) at the inner bottom of the casing (1).
and a drive shaft (41) inside the support member (5).
) is provided with a fixed displacement oil pump (6) communicating with the oil reservoir (1a), and a compression chamber between each scroll (21) and (22) is provided in the fixed scroll (21). A plurality of oil inlets (23) are formed to open at the 6
An oil injection passage (13) is provided between the injection port (23) and the discharge side of the oil pump (6). When the compression element (2) is rotationally driven, the drive shaft (41)
As a result of the operation of the oil pump (6), oil is pumped up from the oil reservoir (1a) of the casing (1), and this pumped oil is transferred to the injector a as shown by the solid line arrow in the figure. The discharged gas is cooled by being injected into the compression chamber of the compression element (2) from each of the inlets (23) through the passageway (13). In addition, the oil pump (7
) can be supplied to each lubricating part from an oil passage (not shown) provided inside the drive shaft (41).

また、前記ケーシング(1)に接続される吐出ライン(
12)には、該ライン(12)内を吐出される吐出ガス
中の油を分離する油分離器(7)を介装させて、この油
分離器(7)の液域に前記後入管(11)を介して前記
油溜(1a)に連通される油戻り通路(14)を接続す
る。そして、前記油分離器(7)で分離された油を、同
図の実線矢印で示したように、前記油戻り通路(14)
から吸入管(11)を介して前記ケーシング(1)内の
モータ(4)を冷却しなから油溜(1a)へと戻し、該
油溜(1a)での油量確保を行って、前記圧縮要素(2
)側への油のインジェクションを安定して行うようにし
ている。又、前記分離器(7)で油が分離されたガスは
、同図の点線矢印で示したように、前記吐出ライン(1
2)から凝縮器などに吐出させるのである。
In addition, a discharge line (
12) is equipped with an oil separator (7) that separates oil from the discharged gas discharged through the line (12), and the post-inlet pipe ( 11), an oil return passageway (14) communicating with the oil sump (1a) is connected thereto. The oil separated by the oil separator (7) is then transferred to the oil return passageway (14) as shown by the solid arrow in the figure.
The motor (4) in the casing (1) is returned to the oil sump (1a) through the suction pipe (11) without being cooled, and the amount of oil in the oil sump (1a) is ensured. Compression element (2
) side to ensure stable oil injection. Further, the gas from which oil has been separated by the separator (7) is transferred to the discharge line (1) as indicated by the dotted arrow in the same figure.
2) is discharged to a condenser or the like.

尚、同図において、(15)は前記吐出ライン(12)
における前記ケーシング(1)と油分離器(7)との間
に介装させたガス冷却用の熱交換器、(16)は前記油
インジェクション通路(13)の途中に介装させた油冷
却器である。
In addition, in the same figure, (15) is the discharge line (12).
A heat exchanger for cooling the gas is interposed between the casing (1) and the oil separator (7), and (16) is an oil cooler interposed in the middle of the oil injection passage (13). It is.

更に、第2図で示したように、前記油戻り通路(14)
に、該通路(14)からケーシング油溜(1a)への戻
り油量を、前記油ポンプ(6)から圧縮要素(2)側へ
のインジェクション量より少なくする油量調整手段(8
)を設けると共に、前記油分離器(7)の油面が所定高
さ以上のときに、前記油量調整手段(8)を側路して前
記吸入管(11)から油溜(1a)側に至るバイパス路
(エフ)を設けることも可能である。
Furthermore, as shown in FIG. 2, the oil return passage (14)
and an oil amount adjusting means (8) for making the amount of oil returned from the passage (14) to the casing oil sump (1a) smaller than the amount of oil injected from the oil pump (6) to the compression element (2) side.
), and when the oil level of the oil separator (7) is above a predetermined height, the oil amount adjusting means (8) is bypassed and the oil is removed from the suction pipe (11) to the oil sump (1a) side. It is also possible to provide a bypass path (F) leading to.

即ち、第2図に示した前記油量調整手段(8)は、キャ
ピラリーチューブ(81)を用い、該キャピラリーチュ
ーブ(81)を前記油戻り通路(14)の途中に介装さ
せると共に、前記油分離器(7)の内部から前記通路(
14)におけるキャピラリーチューブ(81)の油圧口
側へと延びる前記バイパス1(17)を設けて、このバ
イパス路(17)における油分離器(7)内の端部を、
該油分離器(7)の油面に浮遊させたフロート弁(17
a、 )で開閉させるようになすのである。そして、前
記油分離器(7)の油面が所定高さ以下のときに、前記
フロート弁(17a)でバイパス路(17)を閉鎖して
、前記キャピラリーチューブ(81)で前記油戻り通路
(14)から油溜(la)への戻り油量が、前記油ポン
プ(6)からのインジェクション量より少なくなるよう
に油量制御を行いながら分離油を前記油溜(1a)に戻
し、また、前記油分離器(7)の油面が所定高さ以上と
なったときに、前記フロート弁(17a)でバイパス路
(17)を開放して、該バイパス路(17)から前記油
分離器(7)内の油を前記油溜(1a)へと戻すことに
より、前記分離器(7)内に常に所定の油量を確保して
、該分離器(7)から前記油戻り通路(14)を介して
前記ケーシング(1)にガス漏れが生ずるのを防止して
いる。
That is, the oil amount adjusting means (8) shown in FIG. 2 uses a capillary tube (81), which is interposed in the middle of the oil return passage (14), and the oil The passage (
The bypass 1 (17) extending to the hydraulic port side of the capillary tube (81) in 14) is provided, and the end of this bypass path (17) inside the oil separator (7) is
A float valve (17) suspended on the oil surface of the oil separator (7)
It is made to open and close with a and ). When the oil level of the oil separator (7) is below a predetermined height, the float valve (17a) closes the bypass passage (17) and the capillary tube (81) connects the oil return passage ( Returning the separated oil to the oil sump (1a) while controlling the oil amount so that the amount of oil returned from 14) to the oil sump (la) is smaller than the amount of injection from the oil pump (6), and When the oil level of the oil separator (7) reaches a predetermined height or higher, the float valve (17a) opens the bypass passage (17) and the oil separator (7) is removed from the bypass passage (17). 7) By returning the oil in the oil sump (1a), a predetermined amount of oil is always ensured in the separator (7), and the oil return passage (14) is returned from the separator (7) to the oil return passage (14). This prevents gas from leaking into the casing (1) through the casing (1).

また、前記分離器(7)から前記油溜(1a)への油戻
しも行えるようにして、前記油溜(1a)での油量確保
も行って、効果的なガス冷却が行えるようにしている。
In addition, the oil can be returned from the separator (7) to the oil sump (1a) to ensure the amount of oil in the oil sump (1a), so that effective gas cooling can be performed. There is.

第2図においては、前記ケーシング(1)の内部で固定
スクロール(21)の上部側に、吐出ガス中の油分を分
離するデミスタ−(9)を設けると共に、このデミスタ
−(9)と前記ケーシング(1)の内壁との間に形成さ
れる油貯溜室(1b)に、前記油分離器(7)に至る油
通路(91)を接続する一方、該油通路(91)の途中
に熱交換器(92)を介装させている。
In FIG. 2, a demister (9) for separating oil in discharged gas is provided inside the casing (1) above the fixed scroll (21), and this demister (9) and the casing An oil passage (91) leading to the oil separator (7) is connected to the oil storage chamber (1b) formed between the oil storage chamber (1b) and the inner wall of A container (92) is interposed.

また、前記バイパス路(17)を開閉制御するにあたっ
ては、第3図に示したように、前記油分離器(7)の内
部に油面センサー(17b)を設けると共に、前記バイ
パス路(17)に、前記キャピラリーチューブ(81)
と並列状に前記センサー(17b)からの検出信号で開
閉動作される電磁弁(17c)を介装させて、前記油面
センサー(17b)による電磁弁(17c)の開閉動作
で前記油分離器(7)内の油量を所定高さに制御するこ
とも可能である。
In addition, in controlling the opening and closing of the bypass passage (17), as shown in FIG. 3, an oil level sensor (17b) is provided inside the oil separator (7), and an , the capillary tube (81)
A solenoid valve (17c) that is opened and closed by the detection signal from the sensor (17b) is inserted in parallel with the oil separator by the opening and closing operation of the solenoid valve (17c) by the oil level sensor (17b). It is also possible to control the oil amount in (7) to a predetermined height.

更には、第4図に示した゛ように、前記油ポンプ(6)
と圧縮要素(2)との間に前記インジェクション通路(
13)を設けると共に、前記油分離器(7)に、前記油
戻り通路(14)から分岐される油注入通路(18)を
接続して、この注入通路(18)を介して前記油分離器
(7)から吸入管(11)側に戻される油の一部を、高
低差圧により前記圧縮要素(2)の圧縮ガス中にインジ
ェクションするようにしてもよく、斯くするときには、
前記圧縮要素(2)側に前記インジェクション通路(1
3)と油注入通路(18)との両者から、それぞれ油が
インジェクションされるため、圧縮ガスの冷却を確実に
安定して行い得るのである。
Furthermore, as shown in FIG. 4, the oil pump (6)
and the compression element (2).
13), and an oil injection passage (18) branched from the oil return passage (14) is connected to the oil separator (7), and the oil separator A part of the oil returned from (7) to the suction pipe (11) side may be injected into the compressed gas of the compression element (2) due to the pressure difference between the levels.
The injection passage (1) is provided on the compression element (2) side.
3) and the oil injection passageway (18), the compressed gas can be reliably and stably cooled.

また、第5図に示したように、前記ケーシング(1)の
吸入管(11)と前記油分離器(7)との間に、前記油
量調整手段(8)を構成するキャピラリーチューブ(8
1)が介装された前記油戻り通路(14)と、前記バイ
パス路(17)とをそれぞれ設けると共に、前記油戻り
通路(14)から分岐されて前記圧縮要素(2)側へと
至る前記油注入通路(18)を接続して、この油注入通
路(18)の途中に、前記ギヤピラリ−チューブ(81
)よりも通過油量が大とされた別のキャピラリーチュー
ブ(18a)を介装させてもよく、斯くする場合も、前
述した場合と同様に、前記分離器(7)内に常に所定の
油量を確保しながら、圧縮ガスの冷却を確実に安定して
行い得るのである。
Further, as shown in FIG. 5, a capillary tube (8) constituting the oil amount adjusting means (8) is disposed between the suction pipe (11) of the casing (1) and the oil separator (7).
1) and the bypass passage (17) are provided, respectively, and the oil return passage (14) and the bypass passage (17) are respectively provided, and the oil return passage (14) is branched from the oil return passage (14) and reaches the compression element (2) side. The oil injection passage (18) is connected, and the gear pillar tube (81) is inserted in the middle of this oil injection passage (18).
) may be interposed with another capillary tube (18a) that allows a larger amount of oil to pass through than the separator (7). This makes it possible to reliably and stably cool the compressed gas while ensuring the same amount.

更に、第4.第5図の実施例で示したように、前記油ポ
ンプ(6)と油分離器(7)との両者から前記圧縮要素
(2)側に油のインジェクションを行う場合には、第6
.第7図で示したごとく、前記固定スクロール(21)
の鏡板(21a)でラップ(2l b)の巻回方向中間
部位に、相対白杖に2つの前記油注入口(23)を形成
すると共に、前記鏡板(21a)の内部に前記各油注入
口(23)に連通し、かつ、前記インジェクション通路
(13)に接続される連通路(21c)を設け、該連通
路(21c)と各油注入口(23)とを介して前記油ポ
ンプ(6)からの油を、前記圧縮要素(2)の内部へと
インジェクションさせるのであり、また、前記鏡板(2
1a)におけるラップ(2l b)の巻回方向で前記各
油注入口(23)の中間位置に、複数の油注入口(24
)を別途設ける一方、前記鏡板(2fa、)の内部に前
記各油注入口(24)に連通し、かつ、前記油注入通路
(18)に接続されるれる連通路(21d)を形成し、
この連通路(21,d)と前記各油注入口(23)とを
介して前記油分離器(7)からの油を前記圧縮要素(2
)内へとインジェクションさせるのである。
Furthermore, the fourth. As shown in the embodiment of FIG. 5, when oil is injected from both the oil pump (6) and the oil separator (7) to the compression element (2) side, the sixth
.. As shown in FIG. 7, the fixed scroll (21)
The two oil inlets (23) are formed in the relative white cane at the intermediate portion in the winding direction of the wrap (2l b) with the end plate (21a), and each oil inlet is provided inside the end plate (21a). (23) and is connected to the injection passage (13), and the oil pump (6) ) is injected into the compression element (2), and the end plate (2) is injected into the compression element (2).
1a), a plurality of oil inlets (24
) is separately provided, while forming a communication path (21d) inside the end plate (2fa, ) that communicates with each of the oil injection ports (24) and is connected to the oil injection passage (18),
The oil from the oil separator (7) is transferred to the compression element (2) through the communication path (21, d) and each oil inlet (23).
) is injected into the inside.

(発明の効果) 以上説明したように、本発明にかかるスクロール圧縮機
の冷却装置では、ケーシング(1)の下部に油溜(1a
)を設けると共に、モータ(4)の下部に、前記油溜(
1a)に連通ずる油ポンプ(6)を設けて、この油ポン
プ(6)の吐出側を圧縮要素(2)の油注入口(23)
に接続する一方、前記圧縮要素(2)の吐出ライン(1
2)に油分離器(7)を設けて、該油分離器(7)に前
記油溜(1a)に連通ずる油戻り通路(14)を接続さ
せたから、前記圧縮要素(2)にインジェクションする
油を常に確保でき、安定した吐出ガスの冷却を行い得る
のである。
(Effects of the Invention) As explained above, in the cooling device for a scroll compressor according to the present invention, the oil reservoir (1a
) is provided at the bottom of the motor (4), and the oil sump (
1a) is provided, and the discharge side of this oil pump (6) is connected to the oil inlet (23) of the compression element (2).
while connected to the discharge line (1) of said compression element (2).
Since an oil separator (7) is provided in 2) and an oil return passageway (14) communicating with the oil sump (1a) is connected to the oil separator (7), the oil is injected into the compression element (2). Oil is always available and the discharged gas can be cooled stably.

また、前記油戻り通路(14)に、該通路(14)から
の戻り油量を、前記油ポンプ(6)からの給油量より少
なくする油N調整手段(8)を設けると共に、前記油分
離器(7)の油面が所定高さ以上のとき、前記調整手段
(8)を側路して前記油溜(1a)に連通ずるバイパス
路(17)を設をブることにより、前記油分離器(7)
内に常に所定油量を確保して前記油分離器(7)からケ
ーシング(1)へのガス漏れの発生を防止することがで
き、しかも、前記油溜(1a)側での油量確保もできて
、効果的なガス冷却を行い得るのである。
Further, an oil N adjusting means (8) is provided in the oil return passage (14) to make the amount of oil returned from the passage (14) smaller than the amount of oil supplied from the oil pump (6), and the oil separation means When the oil level in the container (7) is above a predetermined height, a bypass passage (17) bypassing the adjusting means (8) and communicating with the oil sump (1a) is installed. Separator (7)
The oil separator (7) can prevent gas leakage from the oil separator (7) to the casing (1) by always ensuring a predetermined amount of oil in the oil sump (1a). Therefore, effective gas cooling can be performed.

更には、前記油分離器(7)に、前記圧縮要素(2)の
油注入口(23)に接続される油注入通路(18)を配
設けることにより、前記圧縮要素(2)への油のインジ
ェクションを一層確実に安定して行い得るのである。
Furthermore, by providing the oil separator (7) with an oil injection passageway (18) connected to the oil injection port (23) of the compression element (2), oil to the compression element (2) can be reduced. injection can be performed more reliably and stably.

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

第1図は本発明の冷却装置を適用した低圧ドーム形スク
ロール圧縮機の縦断面図、第2図は他の実施例を示す縦
断面図、第3図は油分離器から油溜側への油戻しの一例
を示す図面、第4図及び第5図は油分離器から圧縮要素
側に油インジェクシaンを行う場合の実施例を示す縦断
面図、第6図は固定スクロールの底面図、第7図は第6
図X−X線の断面図、第8図は従来例を示す断面図であ
る。 (1)・・争・ (1a)・・寺 (2)e・1 (21)・・争 (22)−・− (23)・1l− (4)・・・― (6)・φI− ・ケーシング 争油溜 ・圧縮要素 一スクロール(固定) ・スクロール(可動) φ油注入口 φモータ ・油ポンプ (7) ・ ゆ油分離器 争油量調整手段 ・吸入管 ・吐出ライン ・油戻り通路 Φバイパス路 ・油注入通路 第6図 第7図 21t)
Fig. 1 is a longitudinal cross-sectional view of a low-pressure dome scroll compressor to which the cooling device of the present invention is applied, Fig. 2 is a longitudinal cross-sectional view showing another embodiment, and Fig. 3 is a longitudinal cross-sectional view of a low-pressure dome scroll compressor to which the cooling device of the present invention is applied. A drawing showing an example of oil return, FIGS. 4 and 5 are longitudinal cross-sectional views showing an embodiment in which oil is injected from the oil separator to the compression element side, and FIG. 6 is a bottom view of the fixed scroll. Figure 7 is the 6th
FIG. 8 is a sectional view taken along the line XX in FIG. 8, and FIG. 8 is a sectional view showing a conventional example. (1)...Conflict・ (1a)...Temple (2) e・1 (21)...Conflict (22)-- (23)・1l- (4)...- (6)・φI-・Casing oil sump ・Compression element - Scroll (fixed) ・Scroll (movable) φ oil inlet φ motor ・Oil pump (7) ・ Oil separator oil amount adjustment means ・ Suction pipe ・ Discharge line ・ Oil return passage Φ bypass passage/oil injection passage Fig. 6 Fig. 7 21t)

Claims (1)

【特許請求の範囲】 1)一対のスクロール(21)(22)をもつ圧縮要素
(2)とモータ(4)とをケーシング(1)に内装し、
該ケーシング(1)内に吸入管(11)を開口させたス
クロール圧縮機の冷却装置であって、前記ケーシング(
1)の下部に油溜(1a)を設けると共に、前記モータ
(4)の下部に、前記油溜(1a)に連通する油ポンプ
(6)を設けて、この油ポンプ(6)の吐出側を前記圧
縮要素(2)の油注入口(23)に接続する一方、前記
圧縮要素(2)の吐出ライン(12)に油分離器(7)
を設けて、この油分離器(7)に前記油溜(1a)に連
通する油戻り通路(14)を接続したことを特徴とする
スクロール圧縮機の冷却装置。 2)油戻り通路(14)に、該通路(14)から油分離
器(7)における油面高さが所定以上のとき、前記油量
調整手段(8)を側路して油溜(1a)に連通するバイ
パス路(17)を設けたことを特徴とする請求項1記載
のスクロール圧縮機の冷却装置。 3)油分離器(7)に圧縮要素(2)の油注入口(23
)に接続する油注入通路(18)を設けている請求項1
又は2記載のスクロール圧縮機の冷却装置。
[Claims] 1) A compression element (2) having a pair of scrolls (21) (22) and a motor (4) are housed in a casing (1),
A cooling device for a scroll compressor in which a suction pipe (11) is opened in the casing (1), the cooling device comprising:
1), an oil sump (1a) is provided at the bottom of the motor (4), and an oil pump (6) communicating with the oil sump (1a) is provided at the bottom of the motor (4). is connected to the oil inlet (23) of the compression element (2), while an oil separator (7) is connected to the discharge line (12) of the compression element (2).
A cooling device for a scroll compressor, characterized in that the oil separator (7) is connected to an oil return passageway (14) communicating with the oil reservoir (1a). 2) When the oil level level from the passage (14) to the oil separator (7) exceeds a predetermined level, the oil return passage (14) bypasses the oil amount adjusting means (8) and returns the oil to the oil sump (1a). 2. The cooling device for a scroll compressor according to claim 1, further comprising a bypass passage (17) communicating with the scroll compressor. 3) The oil inlet (23) of the compression element (2) is connected to the oil separator (7).
Claim 1 further comprising an oil injection passage (18) connected to
Or the cooling device for a scroll compressor according to 2.
JP11638690A 1990-05-01 1990-05-01 Cooling device for scroll compressor Pending JPH0412187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11638690A JPH0412187A (en) 1990-05-01 1990-05-01 Cooling device for scroll compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11638690A JPH0412187A (en) 1990-05-01 1990-05-01 Cooling device for scroll compressor

Publications (1)

Publication Number Publication Date
JPH0412187A true JPH0412187A (en) 1992-01-16

Family

ID=14685738

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11638690A Pending JPH0412187A (en) 1990-05-01 1990-05-01 Cooling device for scroll compressor

Country Status (1)

Country Link
JP (1) JPH0412187A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055486A (en) * 1991-06-28 1993-01-14 Mitsubishi Electric Corp Oil injection type closed type scroll compressor
JPH09188345A (en) * 1995-12-30 1997-07-22 Samsung Electronics Co Ltd Front panel attaching-detaching device for cold-warm water purifier
JP2011231653A (en) * 2010-04-26 2011-11-17 Mayekawa Mfg Co Ltd Scroll compressor
JP2022543544A (en) * 2019-08-07 2022-10-13 スミトモ (エスエイチアイ) クライオジェニックス オブ アメリカ インコーポレイテッド Helium compressor system with unmodified scroll compressor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55107093A (en) * 1979-02-13 1980-08-16 Hitachi Ltd Enclosed type scroll compressor
JPS61237893A (en) * 1985-04-12 1986-10-23 Hitachi Ltd Scroll compressor
JPS62197689A (en) * 1986-02-24 1987-09-01 Hitachi Ltd Scroll compressor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55107093A (en) * 1979-02-13 1980-08-16 Hitachi Ltd Enclosed type scroll compressor
JPS61237893A (en) * 1985-04-12 1986-10-23 Hitachi Ltd Scroll compressor
JPS62197689A (en) * 1986-02-24 1987-09-01 Hitachi Ltd Scroll compressor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055486A (en) * 1991-06-28 1993-01-14 Mitsubishi Electric Corp Oil injection type closed type scroll compressor
JPH09188345A (en) * 1995-12-30 1997-07-22 Samsung Electronics Co Ltd Front panel attaching-detaching device for cold-warm water purifier
JP2011231653A (en) * 2010-04-26 2011-11-17 Mayekawa Mfg Co Ltd Scroll compressor
JP2022543544A (en) * 2019-08-07 2022-10-13 スミトモ (エスエイチアイ) クライオジェニックス オブ アメリカ インコーポレイテッド Helium compressor system with unmodified scroll compressor

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