WO2017208455A1 - Compresseur à spirales - Google Patents

Compresseur à spirales Download PDF

Info

Publication number
WO2017208455A1
WO2017208455A1 PCT/JP2016/066656 JP2016066656W WO2017208455A1 WO 2017208455 A1 WO2017208455 A1 WO 2017208455A1 JP 2016066656 W JP2016066656 W JP 2016066656W WO 2017208455 A1 WO2017208455 A1 WO 2017208455A1
Authority
WO
WIPO (PCT)
Prior art keywords
scroll
sliding surface
metal member
thrust sliding
scroll compressor
Prior art date
Application number
PCT/JP2016/066656
Other languages
English (en)
Japanese (ja)
Inventor
政哉 岡本
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2016/066656 priority Critical patent/WO2017208455A1/fr
Publication of WO2017208455A1 publication Critical patent/WO2017208455A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Definitions

  • the present invention relates to a scroll compressor used for air conditioning or freezing.
  • scroll compressors are known as compressors used for air conditioning or refrigeration.
  • the scroll compressor disclosed in Patent Document 1 includes a fixed scroll having plate-like spiral teeth, and an orbiting scroll having plate-like spiral teeth that mesh with the plate-like spiral teeth of the fixed scroll.
  • the scroll compressor includes a slider that makes the swing radius of the swing scroll variable, a balance weight that cancels the centrifugal force of the swing scroll generated by the swing motion, a fixed scroll, a swing scroll, and a balance.
  • a frame that accommodates the weight and supports the thrust bearing surface of the orbiting scroll in a freely swingable manner on the thrust sliding surface.
  • the main shaft having an eccentric shaft rotates, and thereby the orbiting scroll is swung to perform compression while reducing the volume toward the center of the compression chamber.
  • a scroll compressor having a balance weight on the slider requires a space for rotating the balance weight, so the inner diameter of the thrust sliding surface of the frame is large. Become. Therefore, in this scroll compressor, the area of the thrust sliding surface of the frame is reduced and the thrust load per unit area of the orbiting scroll is increased, so that the orbiting scroll thrust bearing surface may be abnormally worn or seized. There is.
  • the present invention has been made to solve the above-described problems, and is a scroll compressor that can secure the area of the thrust sliding surface of the frame and reduce abnormal wear and seizure of the orbiting scroll thrust bearing surface.
  • the purpose is to provide.
  • the scroll compressor according to the present invention includes a sealed container, a fixed scroll provided in the sealed container and having a first spiral protrusion, a second scroll protrusion provided in the sealed container, An orbiting scroll that forms a compression chamber for compressing a refrigerant between the fixed scroll, a main shaft having an eccentric shaft portion that causes the orbiting scroll to swing, and between the orbiting scroll and the eccentric shaft portion.
  • an annular metal member having an outer diameter corresponding to the outer diameter of the thrust sliding surface and having an inner diameter smaller than the inner diameter of the thrust sliding surface.
  • a scroll compressor according to the present invention is installed on a thrust sliding surface, has an outer diameter corresponding to the outer diameter of the thrust sliding surface, and has an annular shape having an inner diameter smaller than the inner diameter of the thrust sliding surface. Since the metal member is provided, even if the balance weight is provided, the area of the thrust sliding surface can be ensured by the annular metal member. In other words, the scroll compressor according to the present invention can reduce the thrust load per unit area of the orbiting scroll by supporting the thrust load with the annular metal member, so that the abnormal wear of the orbiting scroll thrust sliding surface can be reduced. In addition, seizure can be reduced.
  • FIG. 1 is a longitudinal sectional view of a scroll compressor according to Embodiment 1 of the present invention.
  • FIG. 2 is an enlarged cross-sectional view of the main part of the scroll compressor according to Embodiment 1 of the present invention.
  • FIG. 3 is an enlarged cross-sectional view showing a relationship between the frame of the scroll compressor according to Embodiment 1 of the present invention and an annular metal member.
  • the scroll compressor 100 demonstrated here shows the example of a vertical installation type, this invention is applicable also to a horizontal installation type.
  • the relationship of the size of each component may be different from the actual one.
  • the scroll compressor 100 is one of components of a refrigeration cycle used in various industrial machines such as a refrigerator, a freezer, a vending machine, an air conditioner, a refrigeration apparatus, or a water heater. .
  • the scroll compressor 100 sucks the refrigerant circulating in the refrigeration cycle, compresses it, and discharges it as a high-temperature and high-pressure state.
  • the scroll compressor 100 has a compression mechanism in which a fixed scroll 2 and a swing scroll 3 that swings with respect to the fixed scroll 2 are combined inside a main body shell 1 that is a sealed dome-type sealed container. Has been implemented.
  • the scroll compressor 100 includes an electric motor 22 including an electric rotary machine or the like inside the main body shell 1. Inside the main body shell 1, the compression mechanism is disposed on the upper side, and the electric motor 22 is disposed on the lower side.
  • the main body shell 1 is formed in a cylindrical shape having a sealed space and has pressure resistance.
  • a suction pipe 14 for taking in the refrigerant into the main body shell 1 is connected to the side surface of the main body shell 1, and a discharge pipe 15 for discharging the compressed refrigerant from the main body shell 1 is connected to the upper surface.
  • a frame 9 that houses the compression mechanism and supports the swing scroll 3 so as to be swingable is fixed to the upper portion of the main body shell 1.
  • the frame 9 includes a thrust sliding surface 9a and supports the orbiting scroll 3 on the thrust sliding surface 9a.
  • a subframe 24 that holds the main shaft 5 that is rotated by the rotation of the electric motor 22 is fixed to the lower side of the main body shell 1. Further, an oil sump 12 for storing the lubricating oil 11 is formed at the bottom of the main body shell 1.
  • the fixed scroll 2 includes a fixed scroll base plate 2a and a first spiral protrusion 2b that is a spiral protrusion standing on the lower surface of the fixed scroll base plate 2a.
  • the orbiting scroll 3 includes an orbiting scroll base plate 3a and a second spiral protrusion 3b that is a spiral protrusion standing on the upper surface of the orbiting scroll base plate 3a.
  • the orbiting scroll 3 is installed eccentrically with respect to the fixed scroll 2, and the first spiral protrusion 2b of the fixed scroll 2 and the second spiral protrusion 3b of the orbiting scroll 3 are combined to compress the refrigerant.
  • a compression chamber 23 is formed. Note that the surface (the lower surface in the illustrated example) of the swing scroll base plate 3a on which the second spiral protrusion 3b is not formed functions as the swing scroll thrust bearing surface 16.
  • the fixed scroll 2 is fixed to the upper surface of the frame 9 with bolts 30.
  • the fixed scroll 2 is formed with a discharge port 17 that discharges a compressed refrigerant at a high temperature and a high pressure at the center of the fixed scroll base plate 2a.
  • the compressed high-temperature and high-pressure refrigerant is discharged from the discharge port 17 to the high-pressure chamber 18 above the fixed scroll 2, passes through the discharge pipe 15, and is discharged outside the main body shell 1.
  • the discharge port 17 is provided with a discharge valve 19 that prevents the refrigerant from flowing backward.
  • the orbiting scroll 3 performs an oscillating motion without rotating with respect to the fixed scroll 2 by an Oldham ring 6 for preventing the rotating motion.
  • a hollow cylindrical boss portion 20 is formed at the center of the surface of the orbiting scroll 3 where the second spiral protrusion 3b is not formed (the lower surface in the illustrated example).
  • the swing scroll 3 swings on the thrust sliding surface 9a of the frame 9 as the eccentric shaft portion 5a provided at the upper end of the main shaft 5 inserted into the boss portion 20 rotates.
  • the Oldham ring 6 is slidably housed in an Oldham groove (not shown) formed on an orbiting scroll thrust bearing surface 16 of the orbiting scroll 3 with an Oldham claw projecting upward and protrudes downward.
  • the Oldham claw is stored and installed in the Oldham keyway 6a formed in the frame 9 so as to be slidable.
  • the Oldham ring 6 may be installed on the formation surface side of the second spiral protrusion 3b of the swing scroll 3 of the swing scroll base plate 3a.
  • the frame 9 is formed in a cylindrical shape that tapers downward in a stepwise manner, and accommodates the swing scroll 3 in a slidable manner.
  • a sliding surface is formed by the thrust sliding surface 9a inside the frame 9 and the lower surface of the swing scroll base plate 3a.
  • the frame 9 is provided with an annular metal member 10 on the thrust sliding surface 9 a and between the swing scroll thrust bearing surface 16 of the swing scroll 3. ing.
  • the annular metal member 10 can be made of, for example, a casting, iron-based, or aluminum-based material as a metal having excellent wear resistance that can withstand a thrust load.
  • the annular metal member 10 has an outer diameter corresponding to the outer diameter R of the thrust sliding surface 9a and an inner diameter smaller than the inner diameter r of the thrust sliding surface 9a.
  • the outer diameter corresponding to the outer diameter R of the thrust sliding surface 9a is substantially the same as the outer diameter R of the thrust sliding surface 9a.
  • a first screw hole 28 penetrating toward the thrust sliding surface 9a is formed in the annular metal member 10.
  • a second screw hole 29 is formed in the thrust sliding surface 9 a of the frame 9 at a position common to the first screw hole 28.
  • the annular metal member 10 has a fixing portion 27 that is screwed to the frame 9 by screwing the screw member 26 passed through the first screw hole 28 into the second screw hole 29.
  • the first screw hole 28 has such a size and shape that the head of the screw member 26 is completely accommodated in the first screw hole 28 and does not hinder the swinging motion of the swing scroll 3.
  • the means for fixing the annular metal member 10 to the frame 9 is not limited to the fixing portion 27 fixed with screws.
  • the annular metal member 10 may have a configuration in which the outer peripheral surface is fixed by being shrink-fitted on the inner peripheral surface of the frame 9. In short, if the annular metal member 10 can be fixed to the frame 9, it can be implemented in various modes.
  • the electric motor 22 includes an annular stator 21 that is fixedly supported on the inner wall surface of the main body shell 1 by shrink fitting or the like, and a rotor 4 that is rotatably attached to the inner surface of the stator 21. It drives the compression mechanism connected via the main shaft 5.
  • the main shaft 5 is inserted into the boss portion 20 of the orbiting scroll 3 at the upper end and is rotatably supported, and an eccentric shaft portion 5a that engages with the orbiting scroll 3 on an eccentric shaft that is eccentric from the center of rotation of the main shaft 5 is provided. Is formed.
  • the main shaft 5 is configured to rotate with the rotation of the rotor 4 and rotate the orbiting scroll 3 with the eccentric shaft portion 5a.
  • the upper portion of the main shaft 5 (in the vicinity of the eccentric shaft portion 5a) is rotatably supported by a main bearing 25a provided at the center portion of the frame 9.
  • the lower portion of the main shaft 5 is rotatably supported by the auxiliary bearing 25b.
  • the sub bearing 25 b is press-fitted and fixed to a bearing housing portion 24 a formed at the center portion of the sub frame 24 provided at the lower portion of the main body shell 1.
  • the sub frame 24 is provided with an oil pump 13. The lubricating oil 11 sucked by the oil pump 13 is sent to each sliding portion through the main shaft oil supply hole 5b formed in the main shaft 5.
  • the main shaft 5 is provided with a balance weight 8 that cancels out the centrifugal force of the orbiting scroll 3 generated by the orbiting motion.
  • the balance weight 8 is disposed on the opposite side of the direction of the centrifugal force acting on the orbiting scroll 3 and is formed integrally with the slider 7. The balance weight 8 can reduce the pressing of the second spiral protrusion 3b against the first spiral protrusion 2b.
  • the slider 7 is rotatably inserted into the boss portion 20, and an eccentric shaft portion 5 a of the main shaft 5 provided at the upper end of the main shaft 5 is inserted into the slide surface. That is, the slider 7 is interposed between the orbiting scroll 3 and the eccentric shaft portion 5a of the main shaft 5, makes the orbiting scroll 3 have a variable orbiting radius, and swings in order to make the orbiting scroll 3 revolve.
  • the moving scroll 3 is supported.
  • the refrigerant to be compressed flows in from the suction pipe 14, is taken into the compression chamber 23 through a suction port (not shown) provided in the frame 9, is compressed, and is compressed from the discharge port 17 at the center of the fixed scroll base plate 2a. It is discharged outside the main body shell 1 through the discharge pipe 15 through the chamber 18.
  • the lubricating oil 11 flows from the oil reservoir 12 at the bottom of the main body shell 1 through the oil pump 13 through the oil pump 13 and is supplied to the bearings, the space on the sliding portion side, etc., and is formed in the frame 9.
  • An oil drain hole (not shown) is returned to the oil sump 12.
  • the inner diameter r of the thrust sliding surface 9a is increased. That is, in the scroll compressor 100, since the area of the thrust sliding surface 9a of the orbiting scroll 3 is reduced, the thrust load per unit area of the orbiting scroll 3 is increased and the orbiting scroll thrust bearing surface 16 is abnormally worn. Or it may cause seizure.
  • the thrust sliding surface 9a has an outer diameter corresponding to the outer diameter R of the thrust sliding surface 9a, and the thrust sliding surface 9a An annular metal member 10 having an inner diameter smaller than the inner diameter r is installed. That is, since the annular metal member 10 having an area larger than the area of the thrust sliding surface 9a is installed on the thrust sliding surface 9a, the annular metal member 10 is provided even if the balance weight 8 is provided. Thus, the area of the thrust sliding surface 9a can be secured. Therefore, the scroll compressor 100 according to the first embodiment can reduce the thrust load per unit area of the orbiting scroll 3, and can reduce abnormal wear and seizure of the orbiting scroll thrust bearing surface 16. .
  • the annular metal member 10 is fixed to the frame 9 with the screw member 26 inserted in the first screw hole 28 and the second screw hole 29 in common, the rocking scroll 3 is swung. It never rotates with respect to the movement, and the effect of preventing the abnormal wear and seizure of the swing scroll thrust bearing surface 16 can be enhanced.
  • the annular metal member 10 has its outer peripheral surface fixed by being shrink-fitted to the inner peripheral surface of the frame 9, thereby enhancing the effect of preventing abnormal wear and seizure of the orbiting scroll thrust bearing surface 16. Can do.
  • FIG. 4 is an enlarged cross-sectional view showing a different form of the main part of the scroll compressor according to Embodiment 1 of the present invention.
  • the annular metal member 10 may have a configuration in which the center of the inner diameter is eccentric from the center of the outer diameter. That is, it is possible to effectively reduce the thrust load by increasing the sliding area of the portion (the left side in the case of FIG. 4) where the thrust load of the orbiting scroll 3 acts particularly.
  • the annular metal member 10 has a surface facing the orbiting scroll thrust bearing surface 16 as an inclined surface that descends from the outer periphery toward the inner periphery, and It is good also as a structure corresponding to the bending of the rocking scroll thrust bearing surface 16 by rocking motion.
  • FIG. 5 is an enlarged cross-sectional view showing the configuration of the annular metal member of the scroll compressor according to Embodiment 2 of the present invention.
  • the description is abbreviate
  • annular first oil supply groove 10a is formed on a surface of the annular metal member 10 facing the swing scroll thrust bearing surface 16.
  • circular shaped metal member 10 is formed, It is characterized by the above-mentioned.
  • the first oil supply groove 10a is composed of a small-diameter oil supply groove and a large-diameter oil supply groove formed at intervals.
  • two second oil supply grooves 10b are formed with an interval of approximately 180 degrees, and intersect with the first oil supply groove 10a.
  • the scroll compressor 100 of the second embodiment the lubricating oil 11 sucked up by the oil pump 13 from the oil reservoir 12 and accumulated in the frame 9 passes through the first oil supply groove 10a and the second oil supply groove 10b.
  • the rocking scroll thrust bearing surface 16 is spread. Therefore, the scroll compressor 100 according to the second embodiment can increase the amount of oil supplied to the thrust surface, so that the thrust slide can be performed smoothly, and abnormal wear and seizure of the orbiting scroll thrust bearing surface 16 occur. The prevention effect can be enhanced.
  • Embodiment 2 shown in FIG. 5 although the structure which formed both the 1st oil supply groove
  • the present invention has been described above based on the embodiment, the present invention is not limited to the configuration of the embodiment described above.
  • the illustrated internal configuration of the scroll compressor 100 is an example, and is not limited to the above-described content, and the scroll compressor 100 including other components can be similarly implemented.
  • the scope of the present invention also includes the scope of various changes, applications, and uses made by those skilled in the art as needed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

Le compresseur à spirales de la présente invention est pourvu : d'un récipient étanche à l'air ; d'une spirale fixe qui comporte une première saillie d'enroulement et qui est disposée à l'intérieur du récipient étanche à l'air ; d'une spirale à variation qui comporte une seconde saillie d'enroulement disposée à l'intérieur du récipient étanche à l'air et formant entre la spirale à variation et la spirale fixe une chambre de compression destinée à comprimer un réfrigérant ; d'un arbre principal qui a une section d'arbre excentrique pour faire varier la spirale à variation ; d'un coulisseau interposé entre la spirale à variation et la section d'arbre excentrique ; d'un poids d'équilibrage disposé sur le coulisseau ; d'un cadre tubulaire qui a une surface de glissement et de poussée annulaire destinée à supporter une charge qui agit sur la spirale à variation ; et d'un élément métallique annulaire qui est disposé sur la surface de glissement et de poussée, qui a un diamètre extérieur correspondant au diamètre extérieur de la surface de glissement et de poussée et qui a un diamètre intérieur inférieur au diamètre intérieur de la surface de glissement de poussée.
PCT/JP2016/066656 2016-06-03 2016-06-03 Compresseur à spirales WO2017208455A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/066656 WO2017208455A1 (fr) 2016-06-03 2016-06-03 Compresseur à spirales

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/066656 WO2017208455A1 (fr) 2016-06-03 2016-06-03 Compresseur à spirales

Publications (1)

Publication Number Publication Date
WO2017208455A1 true WO2017208455A1 (fr) 2017-12-07

Family

ID=60479230

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/066656 WO2017208455A1 (fr) 2016-06-03 2016-06-03 Compresseur à spirales

Country Status (1)

Country Link
WO (1) WO2017208455A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021203638A1 (fr) * 2020-04-07 2021-10-14 艾默生环境优化技术(苏州)有限公司 Ensemble de contrepoids pour compresseur à spirale, et compresseur à spirale
WO2022007256A1 (fr) * 2020-07-10 2022-01-13 艾默生环境优化技术(苏州)有限公司 Compresseur à spirale
DE102022134443A1 (de) 2022-12-21 2024-06-27 OET GmbH Verdrängermaschine

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02277988A (ja) * 1989-04-20 1990-11-14 Hitachi Ltd オイルフリー式スクロール形流体機械
US5591022A (en) * 1995-10-18 1997-01-07 General Motors Corporation Scroll compressor with integral anti rotation means
JPH10141257A (ja) * 1996-11-08 1998-05-26 Mitsubishi Heavy Ind Ltd 密閉型スクロール圧縮機
JP2003169439A (ja) * 2001-12-03 2003-06-13 Hitachi Ltd スピンドルモータとその製造方法
JP2011157895A (ja) * 2010-02-02 2011-08-18 Denso Corp 圧縮機
JP2013032818A (ja) * 2011-08-02 2013-02-14 Daido Metal Co Ltd 内燃機関のクランク軸のスラスト軸受装置
JP2013148041A (ja) * 2012-01-20 2013-08-01 Mitsubishi Heavy Ind Ltd チップシールおよびそれを用いたスクロール圧縮機
JP2014132158A (ja) * 2013-01-04 2014-07-17 Mitsubishi Heavy Industries Automotive Thermal Systems Co Ltd スクロール型圧縮機
JP2015229974A (ja) * 2014-06-05 2015-12-21 三菱重工オートモーティブサーマルシステムズ株式会社 スクロール圧縮機

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02277988A (ja) * 1989-04-20 1990-11-14 Hitachi Ltd オイルフリー式スクロール形流体機械
US5591022A (en) * 1995-10-18 1997-01-07 General Motors Corporation Scroll compressor with integral anti rotation means
JPH10141257A (ja) * 1996-11-08 1998-05-26 Mitsubishi Heavy Ind Ltd 密閉型スクロール圧縮機
JP2003169439A (ja) * 2001-12-03 2003-06-13 Hitachi Ltd スピンドルモータとその製造方法
JP2011157895A (ja) * 2010-02-02 2011-08-18 Denso Corp 圧縮機
JP2013032818A (ja) * 2011-08-02 2013-02-14 Daido Metal Co Ltd 内燃機関のクランク軸のスラスト軸受装置
JP2013148041A (ja) * 2012-01-20 2013-08-01 Mitsubishi Heavy Ind Ltd チップシールおよびそれを用いたスクロール圧縮機
JP2014132158A (ja) * 2013-01-04 2014-07-17 Mitsubishi Heavy Industries Automotive Thermal Systems Co Ltd スクロール型圧縮機
JP2015229974A (ja) * 2014-06-05 2015-12-21 三菱重工オートモーティブサーマルシステムズ株式会社 スクロール圧縮機

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021203638A1 (fr) * 2020-04-07 2021-10-14 艾默生环境优化技术(苏州)有限公司 Ensemble de contrepoids pour compresseur à spirale, et compresseur à spirale
WO2022007256A1 (fr) * 2020-07-10 2022-01-13 艾默生环境优化技术(苏州)有限公司 Compresseur à spirale
DE102022134443A1 (de) 2022-12-21 2024-06-27 OET GmbH Verdrängermaschine

Similar Documents

Publication Publication Date Title
JP4859730B2 (ja) スクロール圧縮機
EP2390507B1 (fr) Dégagements du palier de l'arbre d'un compresseur hermétique
RU2567346C1 (ru) Спиральный компрессор
JP6554926B2 (ja) スクロール圧縮機
WO2017208455A1 (fr) Compresseur à spirales
JP6305552B2 (ja) スクロール圧縮機
JP2005291209A (ja) スクロール圧縮機の偏心ブッシュ結合構造
JP6425744B2 (ja) 圧縮機
JP2008180094A (ja) スクロール型流体機械
JP6366833B2 (ja) スクロール圧縮機
KR100657038B1 (ko) 유체압축기
JP6351749B2 (ja) スクロール圧縮機
WO2015155802A1 (fr) Compresseur à volutes
JP6104396B2 (ja) スクロール圧縮機
JP6192801B2 (ja) 圧縮機
JP2014136985A (ja) スクロール型圧縮機
WO2016143186A1 (fr) Compresseur comprenant un palier lisse
JP2018119503A (ja) 密閉型圧縮機
JP6869378B2 (ja) ロータリ圧縮機
JP5836845B2 (ja) スクロール圧縮機
JP4593448B2 (ja) 冷媒圧縮機
JP2009062858A (ja) 横形圧縮機
JP2004100660A (ja) スクロール圧縮機
JP6643712B2 (ja) ２シリンダ型密閉圧縮機
JPH11132173A (ja) 流体圧縮機

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16904080

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16904080

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP