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JPH0765583B2 - Scroll compressor - Google Patents
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JPH0765583B2 - Scroll compressor - Google Patents

Scroll compressor

Info

Publication number
JPH0765583B2
JPH0765583B2 JP31921788A JP31921788A JPH0765583B2 JP H0765583 B2 JPH0765583 B2 JP H0765583B2 JP 31921788 A JP31921788 A JP 31921788A JP 31921788 A JP31921788 A JP 31921788A JP H0765583 B2 JPH0765583 B2 JP H0765583B2
Authority
JP
Japan
Prior art keywords
oil
compressor
casing
pipe
specified
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 - Lifetime
Application number
JP31921788A
Other languages
Japanese (ja)
Other versions
JPH02163491A (en
Inventor
一成 新木
佳廣 西川
陽介 田中
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 JP31921788A priority Critical patent/JPH0765583B2/en
Publication of JPH02163491A publication Critical patent/JPH02163491A/en
Publication of JPH0765583B2 publication Critical patent/JPH0765583B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、主にツイン形として使用するスクロール形圧
縮機、詳しくは2台の圧縮機を1組として用い、各圧縮
機の分担能力を変更させて、トータル能力を各種変化さ
せることにより、負荷変動の大きいビル空調などに使用
するスクロール形圧縮機に関する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention mainly relates to a scroll type compressor used as a twin type, and more specifically, two compressors are used as one set and the sharing ability of each compressor is improved. The present invention relates to a scroll compressor used for building air-conditioning and the like, in which the load varies greatly by changing the total capacity.

(従来の技術) 従来、この種ツイン形の圧縮機は、例えば実開昭59−81
791号公報に記載され、かつ、第3図に示したごとく、
底部に油溜(O)をもつ密閉ケーシング(C)内に、モ
ータ(M)と圧縮要素(CF)とを配設して成る2つの第
1及び第2圧縮機(CP1)(CP2)を備え、これら各圧縮
機(CP1)(CP2)の各ケーシング(C)に吸入管(IT)
と吐出管(OT)とを接続させている。
(Prior Art) Conventionally, a twin-type compressor of this type has been disclosed in, for example, SAIKAI Sho 59-81.
As described in Japanese Patent No. 791 and shown in FIG. 3,
Two first and second compressors (CP1) and (CP2), each having a motor (M) and a compression element (CF) arranged in a closed casing (C) having an oil sump (O) at the bottom, The suction pipe (IT) is installed in each casing (C) of each compressor (CP1) (CP2)
And the discharge pipe (OT) are connected.

また、前記各ケーシング(C)間には、その各油溜
(O)の規定油面(NO)近くに、横方向に向けて開口さ
れる均油管(T)を接続して、該均油管(T)で、前記
各圧縮機(CP1)(CP2)の分担能力の差異に基づく前記
各ケーシング(C)内の圧力差によって発生する油面高
さのアンバランスを是正するようにしている。即ち、例
えば第1圧縮機(CP1)側の油面高さが、規定油面(N
O)以上に上昇した場合には、前記均油管(T)を介し
て第2圧縮機(CP2)側に油の移送を行い、逆に、規定
油面(NO)以下に下降した場合には、前記均油管(T)
を介して第2圧縮機(CP2)から第1圧縮機(CP1)側に
油の移送を行い、これら各圧縮機(CP1)(CP2)間での
油面高さを均一となすようにしている。
Further, between the casings (C), an oil leveling pipe (T) opened in the lateral direction is connected near the specified oil level (NO) of each oil sump (O), and the oil leveling pipes are connected. At (T), the imbalance of the oil level caused by the pressure difference in each casing (C) based on the difference in the sharing capacity of each compressor (CP1) (CP2) is corrected. That is, for example, the oil level height on the first compressor (CP1) side is equal to the specified oil level (N
If it rises above O), oil is transferred to the second compressor (CP2) side through the oil equalizing pipe (T), and conversely if it falls below the specified oil level (NO), , The oil equalizing pipe (T)
The oil is transferred from the second compressor (CP2) to the first compressor (CP1) side via the so that the oil level between the compressors (CP1) (CP2) becomes uniform. There is.

(発明が解決しようとする課題) 所で、前記各圧縮機(CP1)(CP2)の運転中には、その
分担能力の差異に基づき、各ケーシング(C)間に圧力
差が発生し、しかも該各ケーシング(C)の内部には、
潤滑箇所に給油した後の戻り油などが回転部分で飛散さ
れて多量のオイルミストが発生し、このオイルミストが
前記ケーシング(C)の上方から下方に向けて常時降下
していることから、該オイルミストが、高圧とされた例
えば第1圧縮機(CP1)側の油面高さが規定油面(NO)
以下に下降された場合でも、前記均油管(T)を介して
低圧とされた第2圧縮機(CP2)側へと多量に移送さ
れ、特に前記均油管(T)は、各ケーシング(C)に横
方向に向けて開口されているため、下方に降下する多量
のオイルミストが速やかに第2圧縮機(CP2)側へと移
送され易くなり、この結果、前記第1圧縮機(CP1)側
では、油切れを起こして潤滑性能を損なう虞れがあり、
また、前記第2圧縮機(CP2)側では、過剰給油となっ
て油圧縮を行ったりするなどの問題があった。
(Problems to be solved by the invention) However, during the operation of each of the compressors (CP1) and (CP2), a pressure difference occurs between the casings (C) based on the difference in the sharing capacity, and Inside each casing (C),
Return oil after refueling the lubricated part is scattered at the rotating part to generate a large amount of oil mist, and this oil mist constantly descends from above the casing (C) to below. When the oil mist has a high pressure, for example, the oil level on the first compressor (CP1) side is the specified oil level (NO).
Even when the oil is lowered below, a large amount is transferred to the low pressure second compressor (CP2) side through the oil equalizing pipe (T), and in particular, the oil equalizing pipe (T) is each casing (C). Since a large amount of oil mist that descends downward is easily transferred to the second compressor (CP2) side as a result of being laterally opened to the side, as a result, the first compressor (CP1) side Then, there is a risk of running out of oil and impairing lubrication performance,
Further, there is a problem that the second compressor (CP2) side causes excessive oil supply and oil compression.

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、オイルミストの移動量を少なくして、油切れに
よる潤滑性能の低下や過剰給油による油圧縮などの問題
を防止することができるスクロール形圧縮機を提供する
ことにある。
The present invention has been made in view of the above problems, and an object thereof is to reduce the movement amount of oil mist to prevent problems such as deterioration of lubricating performance due to oil shortage and oil compression due to excessive oil supply. It is to provide a scroll type compressor capable of

(課題を解決するための手段) 上記目的を達成するために、本発明では、底部に油溜
(O)を備えた密閉ケーシング(1)に、固定及び可動
スクロール(2)(3)をもった圧縮要素(4)を内装
すると共に、前記ケーシング(1)の内部に、並列運転
用の外部圧縮機との間に介装される均油管(8)を開口
したスクロール形圧縮機において、前記均油管(8)
を、前記油溜(O)における規定油面(NO)に対し上方
に位置する前記ケーシング(1)の側壁(1a)に取付け
ると共に、前記均油管(8)を、下方に指向する開口端
部(9a)をもつ内部配管(9)を介して前記規定油面
(NO)近くに開口したことを特徴とするものである。
(Means for Solving the Problems) In order to achieve the above object, in the present invention, a fixed and movable scrolls (2) and (3) are provided in a closed casing (1) having an oil sump (O) at the bottom. And a compression element (4) inside the casing (1), and an oil equalizing pipe (8) interposed between the casing (1) and an external compressor for parallel operation is opened. Oil leveling pipe (8)
Is attached to the side wall (1a) of the casing (1) located above the specified oil level (NO) in the oil sump (O), and the oil equalizing pipe (8) is directed downward toward the opening end. It is characterized in that it is opened near the specified oil level (NO) through an internal pipe (9) having (9a).

(作用) 以上の圧縮機では、前記ケーシング(1)に接続される
均油管(8)は、開口端部(9a)を下方に指向させた内
部配管(9)を介して、前記油溜(O)の規定油面(N
O)近くに開口されている。一方、前記ケーシング
(1)内で発生したオイルミストの自然な流れは下方に
指向している。このため、オイルミストの流れ方向と前
記均油管(8)に通じる内部配管(9)の開口方向が相
反し、これにより、オイルミストは、前記均油管(8)
に入り難くなって、該均油管(8)を介して外部側圧縮
機に至るのが低減されるのである。
(Operation) In the compressor described above, the oil equalizing pipe (8) connected to the casing (1) is provided with the oil sump (8) through the internal pipe (9) having the opening end (9a) directed downward. O) specified oil level (N
O) It is opened near. On the other hand, the natural flow of oil mist generated in the casing (1) is directed downward. For this reason, the flow direction of the oil mist and the opening direction of the internal pipe (9) leading to the oil equalizing pipe (8) are opposite to each other, and thereby the oil mist is in contact with the oil equalizing pipe (8).
It becomes difficult to enter and the amount of reaching the external compressor via the oil equalizing pipe (8) is reduced.

(実施例) 第1図及び第2図は、2つの第1スクロール形圧縮機
(A)と第2スクロール形圧縮機(B)とを並設使用し
たツイン形のものを示しており、前記第1スクロール形
圧縮機(A)には、アンローダピストン(UP)をもち、
100%のフルロード運転と例えば65%のロード運転を可
能とした機械式のアンロード機構(UL)を備え、また、
前記第2スクロール形圧縮機(B)には、モータへの供
給電源周波数を変更するインバータ制御回路(INV)を
備え、これらアンロード機構(UL)とインバータ制御回
路(INV)とで前記各圧縮機(A)(B)の運転容量を
変化させて、そのトータル容量を各種変更可能としてい
る。
(Embodiment) FIGS. 1 and 2 show a twin type in which two first scroll type compressors (A) and two scroll type compressors (B) are used side by side. The first scroll compressor (A) has an unloader piston (UP),
Equipped with a mechanical unload mechanism (UL) that enables 100% full load operation and 65% load operation,
The second scroll compressor (B) is provided with an inverter control circuit (INV) for changing the power supply frequency to the motor, and the unload mechanism (UL) and the inverter control circuit (INV) are used to compress each of the compression units. By changing the operating capacity of the machines (A) and (B), the total capacity can be variously changed.

前記各圧縮機(A)(B)は、密閉ケーシング(1)の
内方上部側に、固定スクロール(2)と可動スクロール
(3)とから成る圧縮要素(4)を配設すると共に、こ
の圧縮要素(4)の下部側にモータ(5)を配設して、
該モータ(5)から延びる駆動軸(6)を伝動機構
(7)を介して前記可動スクロール(3)に連結させ、
前記駆動軸(6)の回転駆動に伴い前記伝動機構(7)
を介して前記可動スクロール(3)を固定スクロール
(2)に対し公転させるようになす一方、前記各圧縮機
(A)(B)における各ケーシング(1)の側壁(1a)
間には、その内方底部に設けた油溜(O)近くに開口さ
れる均油管(8)を接続して、該均油管(8)で前記各
油溜(O)の油量バランスを是正するようにしている。
In each of the compressors (A) and (B), a compression element (4) consisting of a fixed scroll (2) and a movable scroll (3) is arranged on the inner upper side of the closed casing (1), and A motor (5) is arranged on the lower side of the compression element (4),
A drive shaft (6) extending from the motor (5) is connected to the movable scroll (3) via a transmission mechanism (7),
The transmission mechanism (7) accompanying the rotational drive of the drive shaft (6)
The movable scroll (3) is revolved with respect to the fixed scroll (2) via the side wall (1a) of each casing (1) in each compressor (A) (B).
An oil level equalizing pipe (8) opened near the oil sump (O) provided in the inner bottom portion is connected between the oil leveling pipes (8) to balance the oil amount of each oil sump (O). I am trying to correct it.

また、前記各圧縮機(A)(B)の各ケーシング(1)
には、それぞれ吸入管(1b)と吐出管(1c)とを接続し
て、これら各吸入管(1b)及び吐出管(1c)を1本の冷
媒配管に接続すると共に、この各吐出管(1c)の吐出側
に、該各吐出管(1c)から吐出されるガス流体から油を
回収する油分離器(OS)を配設して、該油分離器(OS)
で回収された油を、中間部位にキャピラリチューブ(C
p)をもった油戻し管(1d)を介して前記各ケーシング
(1)内にそれぞれ戻すようにしている。
Also, each casing (1) of each of the compressors (A) and (B)
The suction pipe (1b) and the discharge pipe (1c) are connected to the suction pipe (1b) and the discharge pipe (1c), respectively. An oil separator (OS) for recovering oil from the gas fluid discharged from each discharge pipe (1c) is arranged on the discharge side of 1c), and the oil separator (OS)
The oil collected in step C is transferred to the capillary tube (C
The oil is returned to the inside of each casing (1) through an oil return pipe (1d) having p).

しかして、以上のような構成において、前記各圧縮機
(A)(B)のうち、一方側のケーシング(1)内で発
生したオイルミストが他方側のケーシング(1)に至る
のを阻止するにあたって、次のようにしたのである。
Then, in the above-mentioned configuration, the oil mist generated in the casing (1) on one side of the compressors (A) and (B) is prevented from reaching the casing (1) on the other side. In doing so, I did the following:

即ち、前記均油管(8)を、前記各ケーシング(1)の
側壁(1a)で前記油溜(O)の規定油面(NO)よりも上
方位置に接続すると共に、前記均油管(8)を、開口端
部(9a)が下方側を指向する内部配管(9)を介して、
前記規定油面(NO)近くに開口させたのである。
That is, the oil equalizing pipe (8) is connected to a position above the specified oil level (NO) of the oil sump (O) at the side wall (1a) of each casing (1), and the oil equalizing pipe (8) is connected. Through the internal pipe (9) whose open end (9a) is directed downward,
It was opened near the specified oil level (NO).

具体的には、前記各ケーシング(1)における油溜
(O)の規定油面(NO)よりも上方位置に、それぞれL
形状に屈曲された内部配管(9)と接続継手(10)を介
して接続し、前記各内部配管(9)の一方側の開口端部
(9a)を、前記規定油面(NO)に近接配置すると共に、
前記各内部配管(9)の他方側開口端部に、前記接続継
手(10)を介して前記均油管(8)の長さ方向両端部を
それぞれ一体状に接続したのである。
Specifically, at each position above the specified oil level (NO) of the oil sump (O) in each casing (1), L
The internal pipe (9) bent into a shape is connected via a connection joint (10), and the open end (9a) on one side of each internal pipe (9) is close to the specified oil level (NO). With placement
The lengthwise both ends of the oil equalizing pipe (8) are integrally connected to the other open end of each internal pipe (9) through the connection joint (10).

斯くすることにより、例えば、前記第1圧縮機(A)側
を100%フルロード運転で高容量となし、また、第2圧
縮機(B)側を30Hzの50%ロード運転で低容量として運
転を行う場合、高容量とされた前記第1圧縮機(A)側
では、各スクロール(2)(3)間に吸入される単位時
間当たりの吸入量増大に伴い、そのケーシング(1)の
内部圧力が相対的に低くなり、また、低容量とされた前
記第1圧縮機(B)側では、単位時間当たりの吸入量が
減少して、そのケーシング(1)の内部圧力が相対的に
高くなり、この高圧側の第2圧縮機(B)で発生したオ
イルミストが、前記均油管(8)を介して低圧側の第1
圧縮機(A)へと多量に移動しようとするのであるが、
前記均油管(8)は、前記内部配管(9)を介して前記
油溜(O)の規定油面(NO)近くに開口されているた
め、下方に指向するオイルミストは前記均油管(8)に
入り難くなって、該均油管(8)を経て前記第1圧縮機
(A)側に至るのが阻止されるのであり、従って前記各
圧縮機(A)(B)における各ケーシング(1)内の油
面高さが適正に保持されることになる。
By doing so, for example, the first compressor (A) side is operated at a high capacity at 100% full load operation, and the second compressor (B) side is operated at a low capacity at 30 Hz 50% load operation. In the case of performing the above, on the side of the first compressor (A), which has a high capacity, the inside of the casing (1) of the scroll (2) (3) is increased due to an increase in the intake amount per unit time. The pressure becomes relatively low, and on the side of the first compressor (B), which has a low capacity, the suction amount per unit time decreases and the internal pressure of the casing (1) becomes relatively high. The oil mist generated in the second compressor (B) on the high pressure side passes through the oil equalizing pipe (8) to the first on the low pressure side.
I try to move a lot to the compressor (A),
Since the oil equalizing pipe (8) is opened near the specified oil level (NO) of the oil sump (O) via the internal pipe (9), the oil mist directed downward is directed to the oil equalizing pipe (8). ), It is prevented from reaching the first compressor (A) side through the oil equalizing pipe (8), and therefore each casing (1) in each compressor (A) (B) is blocked. The oil level inside () will be maintained properly.

(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形圧縮
機では、並列運転用圧縮機との間に接続される均油管
(8)を、密閉ケーシング(1)の側壁(1a)で、その
油溜(O)における規定油面(NO)よりも上方位置に接
続すると共に、前記均油管(8)を、下方を指向する開
口端部(9a)をもった内部配管(9)を介して前記規定
油面(NO)近くに開口させたから、前記ケーシング
(1)内で発生したオイルミストが、前記均油管(8)
を介して他方側圧縮機に多量に移動するのを低減でき、
油面高さを適正に保持でき、油切れによる潤滑性能の低
下や過剰給油による油圧縮などを防止できるに至ったの
である。
(Effects of the Invention) As described above, in the scroll compressor according to the present invention, the oil equalizing pipe (8) connected to the compressor for parallel operation is connected to the side wall (1a) of the hermetic casing (1). An internal pipe (9) having an opening end (9a) directed downward while connecting the oil equalizer pipe (8) to a position higher than a specified oil level (NO) in the oil sump (O). The oil mist generated in the casing (1) is opened near the specified oil level (NO) via the oil equalizing pipe (8).
It is possible to reduce a large amount of movement to the other side compressor via
The oil level can be properly maintained, and it is possible to prevent deterioration of lubrication performance due to oil shortage and oil compression due to excessive oil supply.

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

第1図は本発明にかかるスクロール形圧縮機のツイン形
としての使用形態を示す縦断面図、第2図は同平面図、
第3図は従来例の図面である。 (1)……密閉ケーシング (1a)……側壁 (2)……固定スクロール (3)……可動スクロール (4)……圧縮要素 (8)……均油管 (9)……内部配管 (9a)……開口端部 (O)……油溜 (NO)……規定油面
FIG. 1 is a vertical cross-sectional view showing a usage mode of a scroll type compressor according to the present invention as a twin type, and FIG. 2 is a plan view of the same.
FIG. 3 is a drawing of a conventional example. (1) …… Closed casing (1a) …… Sidewall (2) …… Fixed scroll (3) …… Movable scroll (4) …… Compression element (8) …… Equalization pipe (9) …… Internal piping (9a ) …… Opening end (O) …… Oil sump (NO) …… Regulated oil level

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】底部に油溜(O)を備える密閉ケーシング
(1)に、固定及び可動スクロール(2)(3)をもつ
圧縮要素(4)を内装すると共に、前記ケーシング
(1)の内部に、並列運転用の外部圧縮機との間に介装
される均油管(8)を開口したスクロール形圧縮機であ
って、前記均油管(8)を、前記油溜(O)における規
定油面(NO)に対し上方に位置する前記ケーシング
(1)の側壁(1a)に取付けると共に、前記均油管
(8)を、下方に指向する開口端部(9a)をもつ内部配
管(9)を介して前記規定油面(NO)近くに開口したこ
とを特徴とするスクロール形圧縮機。
1. A hermetic casing (1) having an oil sump (O) at the bottom thereof is equipped with a compression element (4) having fixed and movable scrolls (2) (3), and the interior of the casing (1). A scroll type compressor having an open oil equalizing pipe (8) interposed between an external compressor for parallel operation, wherein the oil equalizing pipe (8) is a specified oil in the oil sump (O). The oil equalizer pipe (8) is attached to the side wall (1a) of the casing (1) located above the surface (NO), and the internal pipe (9) having an opening end (9a) directed downward is provided. A scroll type compressor characterized in that it is opened near the specified oil level (NO) through.
JP31921788A 1988-12-17 1988-12-17 Scroll compressor Expired - Lifetime JPH0765583B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31921788A JPH0765583B2 (en) 1988-12-17 1988-12-17 Scroll compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31921788A JPH0765583B2 (en) 1988-12-17 1988-12-17 Scroll compressor

Publications (2)

Publication Number Publication Date
JPH02163491A JPH02163491A (en) 1990-06-22
JPH0765583B2 true JPH0765583B2 (en) 1995-07-19

Family

ID=18107720

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31921788A Expired - Lifetime JPH0765583B2 (en) 1988-12-17 1988-12-17 Scroll compressor

Country Status (1)

Country Link
JP (1) JPH0765583B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015122443B4 (en) * 2015-12-21 2022-12-22 Bitzer Kühlmaschinenbau Gmbh refrigerant compressor system

Also Published As

Publication number Publication date
JPH02163491A (en) 1990-06-22

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