JP3379114B2 - Rotary compressor - Google Patents

Rotary compressor

Info

Publication number
JP3379114B2
JP3379114B2 JP22743892A JP22743892A JP3379114B2 JP 3379114 B2 JP3379114 B2 JP 3379114B2 JP 22743892 A JP22743892 A JP 22743892A JP 22743892 A JP22743892 A JP 22743892A JP 3379114 B2 JP3379114 B2 JP 3379114B2
Authority
JP
Japan
Prior art keywords
crankshaft
roller
diameter portion
lubricating oil
small
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
Application number
JP22743892A
Other languages
Japanese (ja)
Other versions
JPH0674176A (en
Inventor
裕吉 中田
浩一 関口
弘康 大和田
康也 新岡
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
Original Assignee
Hitachi 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 filed Critical Hitachi Ltd
Priority to JP22743892A priority Critical patent/JP3379114B2/en
Publication of JPH0674176A publication Critical patent/JPH0674176A/en
Application granted granted Critical
Publication of JP3379114B2 publication Critical patent/JP3379114B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 【0001】 【産業上の利用分野】本発明はロータリ圧縮機に係り、
ローラ外周の摩耗に対する信頼性向上に好適な構造を有
するロータリ圧縮機に関するものである。 【0002】 【従来の技術】先ず、一般的なロータリ圧縮機の構成を
図4ないし図5を参照して説明する。図4は、一般的な
ロータリ圧縮機の縦断面図、図5は、図4の要部拡大断
面図、このロータリ圧縮機は、密閉容器11内の上部に
回転子1と固定子2からなる電動機部3を配設し、下部
には、シリンダ4、ローラ5、上ベアリング6、下ベア
リング7、ベーン8によって構成される圧縮機構部9を
配設している。電動機部3と圧縮機構部9とはクランク
軸10で連結されており、クランク軸10の偏心部10
aには回転自在にローラ5が嵌入されている。密閉容器
11内の底部には潤滑油12が貯溜されている。ここで
前記上ベアリング6には環状溝6aと連通穴6bが細径
部6cと太径部6dより形成されている。 【0003】このようなロータリ圧縮機の、運転時にお
ける潤滑油12はクランク軸10の下端より吸い上げら
れクランク軸偏心部10aに設けた給油穴10bを経て
前記クランク軸偏心部10aの外周と前記ローラ5の内
周間を潤滑し、その一部はローラ5の上下の隙間13よ
り圧縮室14内に流入しローラ5の外周とベーン8の先
端の摺動部へ供給される。 【0004】また、潤滑油12中には、冷媒が溶け込ん
でいるため、高温になっているクランク軸偏心部10a
外周とローラ5に触れた際、その溶け込んでいた冷媒が
蒸発する。この時、蒸発した冷媒ガスはクランク軸偏心
部10a外周はもちろん、クランク軸偏心部10aの上
方に位置している上ベアリング6に潤滑油12を供給す
る横穴10bからの潤滑油と混合して上ベアリング6に
設けたスパイラル給油溝より供給されてしまうため、上
ベアリング6をも円滑な摺動を阻害しないよう、その蒸
発したガスは環状溝6aを経て連通穴6bより圧縮機構
部9外に放出されるようにしている。この際、前記連通
穴6bからは同時に潤滑油12も排出される可能性があ
ったため、前述したローラ5の外周とベーン8の先端の
摺動部へ供給される潤滑油量が減少してしまい、本発明
の実施例で詳細を後述する図3に示すように圧縮機の運
転時間とともにローラ5の外周の面粗さが増加する可能
性を有しているものとなっている。 【0005】このようなロータリ圧縮機の構造について
は、HITACHCHI REVIEW June19
87 Vol.36−No.3の179ページのFig
6に記載されているものがあげられる。 【0006】 【発明が解決しようとする課題】上記従来技術で述べた
ように圧縮機の運転時間とともにローラ5の外周の面粗
さが増加するという問題点があった。 【0007】本発明は上記問題を解決して、ローラ5の
外周とベーン8の先端の摺動部の耐久性の向上を図った
ロータリ圧縮機を市場に提供するものである。 【0008】すなわち、本発明の目的は、ローラ5の外
周とベーン8の先端の摺動部の耐久性の低下が無く、か
つ潤滑油中には、冷媒が溶け込んでいるため、高温にな
っているクランク軸偏心部10a外周とローラ5に触れ
た際、その溶け込んでいた冷媒が蒸発しても、上ベアリ
ング6とクランク軸10間の円滑な摺動を阻害すること
の無いロータリ圧縮機を提供するものである。 【0009】 【課題を解決するための手段】上記目的は、以下に述べ
る手段により達成される。すなわち、冷媒ガスを上ベア
リング外部に排出するために環状溝と上ベアリング外部
を連通する穴を細径部と太径部をもつ段付き構造とし
て、その太径部に細径部より径が小さい穴で細径部下端
より前記穴下端が上方に位置している小穴を設けた部材
を太径部に設けることにより達成できる。 【0010】 【作用】本発明は上ベアリング6に環状溝6aと連通穴
6bが細径部と太径部より形成されているが、ロータリ
圧縮機の運転時における潤滑油12はクランク軸10の
下端より吸い上げられクランク軸偏心部10aに設けた
給油穴10bを経て前記クランク軸偏心部10aの外周
と前記ローラ5の内周間を潤滑し、その一部はローラ5
の上下の隙間13より圧縮室14内に流入しローラ5の
外周とベーン8の先端の摺動部へ供給される。 【0011】また、潤滑油中には、冷媒が溶け込んでい
るため、高温になっているクランク軸偏心部10a外周
とローラ5に触れた際、その溶け込んでいた冷媒が蒸発
する。 この時、蒸発した冷媒ガスは環状溝6aを経て
連通穴6bより圧縮機構部9外に放出されるようにして
いる。前記連通穴6bは細径部と太径部をもつ段付き構
造として、その太径部に細径部より径が小さい穴で細径
部下端より前記穴下端が上方に位置している小穴を設け
た部材を太径部に挿入係止したので、前記連通穴6bか
ら同時に排出される潤滑油12の油量が低減されその
分、ローラ5の外周とベーン8の先端の摺動部へ供給さ
れる潤滑油量が増加するので、ローラ外周とベーン先端
の摺動部の耐久性の向上を図ることが出来る。 【0012】 【実施例】以下、本発明の一実施例を図1、図2、図3
により説明する。 【0013】図1において、密閉容器11内の上部に回
転子1と固定子2からなる電動機部3を配設し、下部に
は、シリンダ4、ローラ5、上ベアリング6、下ベアリ
ング7、ベーン8によって構成される圧縮機構部9を配
設している。電動機部3と圧縮機構部9とはクランク軸
10で連結されており、クランク軸10の偏心部10a
には回転自在にローラ5が嵌入されている。密閉容器1
1内の底部には潤滑油12が貯溜されている。ここで前
記上ベアリング6には環状溝6aと連通穴6bが細径部
6cと太径部6dより形成されている。 【0014】このようなロータリ圧縮機の、運転時にお
ける潤滑油12はクランク軸10の下端より吸い上げら
れクランク軸偏心部10aに設けた給油穴10bを経て
前記クランク軸偏心部10aの外周と前記ローラ5の内
周間を潤滑し、その一部はローラ5の上下の隙間13よ
り圧縮室14内に流入しローラ5の外周とベーン8の先
端の摺動部へ供給される。 【0015】また、潤滑油中には、冷媒が溶け込んでい
るため、高温になっているクランク軸偏心部10a外周
とローラ5に触れた際、その溶け込んでいた冷媒が蒸発
する。この時、蒸発した冷媒ガスはクランク軸偏心部1
0a外周はもちろん、クランク軸偏心部10aの上方に
位置している上ベアリング6に潤滑油を供給する横穴1
0bからの潤滑油と混合して、上ベアリング6に設けた
スパイラル給油溝より供給されてしまうため、上ベアリ
ング6をも円滑な摺動を阻害しないよう、その蒸発した
ガスは環状溝6aを経て連通穴6bより圧縮機構部9外
に放出されるようにしている。ここで、図5に示すよう
に、前記連通穴6bは細径部6cと太径部6dをもつ段
付き構造としており、その太径部6dには細径部6cよ
り径が小さい穴で細径部6c下端より前記穴下端が上方
に位置している小穴15aを設けた部材15を太径部6
dに挿入係止したので、前記連通穴6bから同時に排出
される潤滑油12の油量が低減され、その分ローラ5の
外周とベーン8の先端の摺動部へ供給される潤滑油量が
増加するので、ローラ5の外周とベーン8の先端の摺動
部の耐久性の向上を図ることが出来る。尚、図3に本実
施例における圧縮機の運転時間とローラ5の外周の面粗
さの関係を示すが、図3より明らかなようにローラ5の
外周の面粗さが増加しているものとなっている。 【0016】 【発明の効果】以上説明したように、本発明によれば、
上ベアリングの円滑な摺動を阻害することなく、ローラ
の外周とベーンの先端の摺動部の耐久性の向上を図った
ロータリ圧縮機を提供することができる。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor,
The present invention relates to a rotary compressor having a structure suitable for improving reliability against wear of a roller outer periphery. 2. Description of the Related Art First, the structure of a general rotary compressor will be described with reference to FIGS. 4 is a longitudinal sectional view of a general rotary compressor, FIG. 5 is an enlarged sectional view of a main part of FIG. 4, and this rotary compressor includes a rotor 1 and a stator 2 in an upper part in a closed casing 11. An electric motor section 3 is provided, and a compression mechanism section 9 including a cylinder 4, a roller 5, an upper bearing 6, a lower bearing 7, and a vane 8 is provided below. The motor section 3 and the compression mechanism section 9 are connected by a crankshaft 10, and an eccentric section 10 of the crankshaft 10 is provided.
A roller 5 is rotatably fitted in a. A lubricating oil 12 is stored at the bottom of the sealed container 11. Here, an annular groove 6a and a communication hole 6b are formed in the upper bearing 6 by a small diameter portion 6c and a large diameter portion 6d. [0003] In such a rotary compressor, lubricating oil 12 during operation is sucked up from the lower end of the crankshaft 10, passes through an oil supply hole 10b provided in the crankshaft eccentric portion 10a and the outer periphery of the crankshaft eccentric portion 10a and the roller. The lubrication between the inner circumference of the roller 5 and a part thereof flows into the compression chamber 14 from the upper and lower gaps 13 of the roller 5 and is supplied to the sliding portion between the outer circumference of the roller 5 and the tip of the vane 8. [0004] Further, since the refrigerant is dissolved in the lubricating oil 12, the crankshaft eccentric portion 10a having a high temperature becomes high.
When the outer periphery and the roller 5 are touched, the melted refrigerant evaporates. At this time, the evaporated refrigerant gas is mixed not only with the outer periphery of the crankshaft eccentric portion 10a but also with the lubricating oil from the lateral hole 10b that supplies the lubricating oil 12 to the upper bearing 6 located above the crankshaft eccentric portion 10a. Since the gas is supplied from the spiral oil supply groove provided in the bearing 6, the evaporated gas is discharged from the communication hole 6b to the outside of the compression mechanism 9 through the annular groove 6a so as not to hinder the smooth sliding of the upper bearing 6. I am trying to be. At this time, since the lubricating oil 12 may be simultaneously discharged from the communication hole 6b, the amount of lubricating oil supplied to the sliding portion between the outer periphery of the roller 5 and the tip of the vane 8 is reduced. As shown in FIG. 3 which will be described in detail later in the embodiment of the present invention, there is a possibility that the surface roughness of the outer periphery of the roller 5 increases with the operation time of the compressor. [0005] The structure of such a rotary compressor is described in HITACHICH REVIEW JUNE19.
87 Vol. 36-No. Figure on page 179 of 3
No. 6 are mentioned. [0006] As described in the prior art, there is a problem that the surface roughness of the outer periphery of the roller 5 increases with the operation time of the compressor. The present invention is to solve the above-mentioned problem and to provide a rotary compressor having improved durability of a sliding portion between the outer periphery of the roller 5 and the tip of the vane 8 on the market. That is, the object of the present invention is to prevent the durability of the sliding portion between the outer periphery of the roller 5 and the tip of the vane 8 from being reduced, and to increase the temperature of the lubricating oil because the refrigerant is dissolved. Provided is a rotary compressor which does not hinder smooth sliding between the upper bearing 6 and the crankshaft 10 even when the melted refrigerant evaporates when the outer periphery of the crankshaft eccentric portion 10a and the roller 5 are touched. Is what you do. The above object is achieved by the following means. That is, in order to discharge the refrigerant gas to the outside of the upper bearing, the hole communicating the annular groove and the outside of the upper bearing has a stepped structure having a small diameter portion and a large diameter portion, and the large diameter portion has a smaller diameter than the small diameter portion. the member provided with small holes in which the hole lower than the small-diameter portion the lower end in the hole is positioned above can be achieved by Rukoto provided large-diameter portion. According to the present invention, the upper bearing 6 has an annular groove 6a and a communication hole 6b formed of a small diameter portion and a large diameter portion. Lubricated between the outer periphery of the crankshaft eccentric portion 10a and the inner periphery of the roller 5 through a lubrication hole 10b provided in the crankshaft eccentric portion 10a, and a part thereof is
Flows into the compression chamber 14 through the upper and lower gaps 13 and is supplied to the outer periphery of the roller 5 and the sliding portion at the tip of the vane 8. Further, since the refrigerant is dissolved in the lubricating oil, when the outer periphery of the crankshaft eccentric portion 10a and the roller 5 which are hot are touched, the dissolved refrigerant evaporates. At this time, the evaporated refrigerant gas is discharged outside the compression mechanism 9 through the communication hole 6b through the annular groove 6a. The communication hole 6b is a stepped structure having a small-diameter portion and a large-diameter portion, and a small-diameter hole having a smaller diameter than the small-diameter portion is positioned above the small-diameter portion lower end. Since the provided member is inserted and locked in the large diameter portion, the amount of the lubricating oil 12 simultaneously discharged from the communication hole 6b is reduced, and the lubricating oil 12 is accordingly supplied to the outer periphery of the roller 5 and the sliding portion at the tip of the vane 8. Since the amount of lubricating oil to be used increases, the durability of the sliding portion between the outer periphery of the roller and the tip of the vane can be improved. FIG. 1, FIG. 2 and FIG. 3 show an embodiment of the present invention.
This will be described below. In FIG. 1, an electric motor unit 3 including a rotor 1 and a stator 2 is disposed in an upper portion of a closed container 11, and a cylinder 4, a roller 5, an upper bearing 6, a lower bearing 7, and a vane are provided in a lower portion. The compression mechanism 9 constituted by 8 is provided. The motor section 3 and the compression mechanism section 9 are connected by a crankshaft 10, and an eccentric section 10 a of the crankshaft 10 is provided.
The roller 5 is rotatably fitted in the. Closed container 1
A lubricating oil 12 is stored at the bottom of the inside 1. Here, an annular groove 6a and a communication hole 6b are formed in the upper bearing 6 by a small diameter portion 6c and a large diameter portion 6d. During operation of such a rotary compressor, lubricating oil 12 is sucked up from the lower end of the crankshaft 10, passes through an oil supply hole 10b provided in the crankshaft eccentric portion 10a, and the outer periphery of the crankshaft eccentric portion 10a and the roller. The lubrication between the inner circumference of the roller 5 and a part thereof flows into the compression chamber 14 from the upper and lower gaps 13 of the roller 5 and is supplied to the sliding portion between the outer circumference of the roller 5 and the tip of the vane 8. Further, since the refrigerant is dissolved in the lubricating oil, when the outer periphery of the crankshaft eccentric portion 10a and the roller 5 which are hot are touched, the dissolved refrigerant evaporates. At this time, the evaporated refrigerant gas is supplied to the crankshaft eccentric part 1.
0a not only the outer periphery, but also the lateral hole 1 for supplying lubricating oil to the upper bearing 6 located above the crankshaft eccentric portion 10a.
0b, and is supplied from the spiral oil supply groove provided in the upper bearing 6, so that the evaporated gas passes through the annular groove 6a so as not to hinder the smooth sliding of the upper bearing 6 as well. The gas is discharged from the compression mechanism 9 through the communication hole 6b. Here, as shown in FIG. 5, the communication hole 6b has a stepped structure having a small-diameter portion 6c and a large-diameter portion 6d, and the large-diameter portion 6d has a smaller diameter than the small-diameter portion 6c. The member 15 provided with the small hole 15a in which the lower end of the hole is located above the lower end of the diameter portion 6c
d, the amount of the lubricating oil 12 simultaneously discharged from the communication hole 6b is reduced, and the amount of the lubricating oil supplied to the outer periphery of the roller 5 and the sliding portion at the tip of the vane 8 is reduced accordingly. As a result, the durability of the sliding portion between the outer periphery of the roller 5 and the tip of the vane 8 can be improved. FIG. 3 shows the relationship between the operation time of the compressor and the surface roughness of the outer periphery of the roller 5 in the present embodiment. As is clear from FIG. It has become. As described above, according to the present invention,
A rotary compressor can be provided in which the durability of the sliding portion between the outer periphery of the roller and the tip of the vane is improved without hindering smooth sliding of the upper bearing.

【図面の簡単な説明】 【図1】本発明実施例のロータリ圧縮機縦断面図であ
る。 【図2】図1の要部拡大断面図である。 【図3】従来例と発明本実施例の圧縮機の運転時間とロ
ーラ外周の面粗さの関係を示す線図である。 【図4】一般的なロータリ圧縮機の縦断面図である。 【図5】図4の要部拡大断面図である。 【符号の説明】 1…回転子、 2…固定子、 3…電動機部、 4…シリンダ、 5…ローラ、 6…上ベアリング、 6a…環状溝、 6b…連通穴、 6c…細径部、 6d…太径部、 7…下ベアリング、 8…ベーン、 9…圧縮機構部、 10…クランク軸、 10a…偏心部、 10b…横穴、 11…密閉容器、 12…潤滑油、 13…上下の隙間、 14…圧縮室、 15…部材、 15a…小穴。
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a rotary compressor according to an embodiment of the present invention. FIG. 2 is an enlarged sectional view of a main part of FIG. FIG. 3 is a diagram showing the relationship between the operation time of the compressor of the conventional example and the compressor of the present invention and the surface roughness of the outer periphery of the roller. FIG. 4 is a longitudinal sectional view of a general rotary compressor. FIG. 5 is an enlarged sectional view of a main part of FIG. [Description of Signs] 1 ... rotor, 2 ... stator, 3 ... electric motor section, 4 ... cylinder, 5 ... roller, 6 ... upper bearing, 6a ... annular groove, 6b ... communication hole, 6c ... small diameter section, 6d ... large diameter part, 7 ... lower bearing, 8 ... vane, 9 ... compression mechanism part, 10 ... crankshaft, 10a ... eccentric part, 10b ... side hole, 11 ... closed container, 12 ... lubricating oil, 13 ... upper and lower clearance, 14: compression chamber, 15: member, 15a: small hole.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 新岡 康也 栃木県下都賀郡大平町大字富田800番地 株式会社日立製作所栃木工場内 (56)参考文献 実開 平1−22879(JP,U) Yukio Serizawa、外2 名,“Inverter Contro lled Rotary Com (58)調査した分野(Int.Cl.7,DB名) F04C 23/00 - 29/10 F04C 18/356 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yasuya Shinoka 800, Tomita, Ohira-cho, Ohira-machi, Shimotsuga-gun, Tochigi Pref. "Inverter Controlled Rotary Com (58) Field surveyed (Int. Cl. 7 , DB name) F04C 23/00-29/10 F04C 18/356

Claims (1)

(57)【特許請求の範囲】 【請求項1】密閉容器の上部に電動機部、下部に圧縮機
構部配設されその密閉容器の底部に潤滑油を貯溜し
ロータリ圧縮機において、前記電動機部と前記圧縮機構
部とを連結するクランク軸を軸受けし、そのクランク軸
の偏心部の上方に位置するベアリングにはその軸受下部
に環状溝を設け、前記クランク軸の偏心部に回転自在に
遊合したローラの内周と前記クランク軸の偏心部の外周
との間に、前記クランク軸の下端から潤滑油を吸い上
、その潤滑油より蒸発した冷媒ガスを前記ベアリング
外部に排出するために、前記環状溝と前記ベアリング
外部を連通する連通穴を細径部と太径部をもつ段付き
構造として設け、その細径部より径が小さい穴であっ
て前記細径部下端よりその小穴下端が上方に位置してい
る小穴を設けた部材を前記太径部に設けたことを特徴と
するロータリ圧縮機。
(1) A rotary compressor in which a motor portion is provided at an upper portion of a closed container and a compression mechanism portion is provided at a lower portion, and lubricating oil is stored at a bottom portion of the closed container. Bearing a crankshaft connecting the compression unit and the compression mechanism , and the crankshaft
The of Bearings located above the eccentric portion of the annular groove provided in the bearing lower portion, the outer periphery of the eccentric portion of the inner peripheral and said crankshaft rotatably loosely fitted to the roller the eccentric portion of the crankshaft
Between the crankshaft lower end on <br/> up suck lubricating oil from the refrigerant gas evaporated from the lubricating oil bearing
In order to discharge to the outside, said annular groove and front Kibe bearings communication hole which communicates the external provided as stepped structure with the small diameter portion and the large diameter portion, the small hole diameter than the fine-diameter portion is smaller in its there in
Rotary compressor, characterized in that the small holes lower than the small-diameter portion the lower end is provided with a member provided with small holes is located above the large diameter portion Te.
JP22743892A 1992-08-26 1992-08-26 Rotary compressor Expired - Fee Related JP3379114B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22743892A JP3379114B2 (en) 1992-08-26 1992-08-26 Rotary compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22743892A JP3379114B2 (en) 1992-08-26 1992-08-26 Rotary compressor

Publications (2)

Publication Number Publication Date
JPH0674176A JPH0674176A (en) 1994-03-15
JP3379114B2 true JP3379114B2 (en) 2003-02-17

Family

ID=16860868

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22743892A Expired - Fee Related JP3379114B2 (en) 1992-08-26 1992-08-26 Rotary compressor

Country Status (1)

Country Link
JP (1) JP3379114B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606478A (en) * 2011-01-24 2012-07-25 日立空调·家用电器株式会社 Rotary compressor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4605290B2 (en) 2008-12-17 2011-01-05 ダイキン工業株式会社 Hermetic compressor
JP6066801B2 (en) * 2013-03-29 2017-01-25 三菱電機株式会社 Hermetic rotary compressor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Yukio Serizawa、外2名,"Inverter Controlled Rotary Com

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606478A (en) * 2011-01-24 2012-07-25 日立空调·家用电器株式会社 Rotary compressor
CN102606478B (en) * 2011-01-24 2015-09-30 日立空调·家用电器株式会社 Rotary compressor

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