EP3578823B1 - Compressor and method for manufacturing compressor - Google Patents

Compressor and method for manufacturing compressor Download PDF

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Publication number
EP3578823B1
EP3578823B1 EP19177971.9A EP19177971A EP3578823B1 EP 3578823 B1 EP3578823 B1 EP 3578823B1 EP 19177971 A EP19177971 A EP 19177971A EP 3578823 B1 EP3578823 B1 EP 3578823B1
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EP
European Patent Office
Prior art keywords
refrigerant
injection pipe
liquid
gas
discharge
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.)
Active
Application number
EP19177971.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3578823A1 (en
Inventor
Yoshiaki Miyamoto
Taichi Tateishi
Kosuke Nakamura
Toshiyuki Hokazono
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.)
Mitsubishi Heavy Industries Thermal Systems Ltd
Original Assignee
Mitsubishi Heavy Industries Thermal Systems 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.)
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Publication date
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Publication of EP3578823A1 publication Critical patent/EP3578823A1/en
Application granted granted Critical
Publication of EP3578823B1 publication Critical patent/EP3578823B1/en
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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
    • F04C18/0207—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 both members having co-operating elements in spiral form
    • F04C18/0215—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 both members having co-operating elements in spiral form where only one member is moving
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
    • F04C29/128—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type of the elastic type, e.g. reed valves
    • 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
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/806—Pipes for fluids; Fittings therefor

Definitions

  • the present invention relates to a compressor, and a method for manufacturing a compressor.
  • a refrigerant having low global warming potential is used, so that the temperature of refrigerant gas discharged from a compressor (discharge gas temperature) tends to be increased.
  • Some compressors which are used under a high pressure ratio operation condition such as a refrigerating device for low temperature use, employ a liquid injection structure in which refrigerant liquid is injected during a compression stroke of the compressor, in order to reduce the discharge gas temperature.
  • the following PTL 1 discloses a technology of providing a gas injection hole and a liquid injection hole in a scroll compressor, and properly cooling an electric motor and a compression part.
  • a fixed scroll and an orbit scroll engage with each other, so that compression chambers are symmetrically formed.
  • a gas injection hole and a liquid injection hole provided in the fixed scroll are also desirably formed symmetrically in order to implement stable operation. Therefore, in a configuration in which a gas injection pipe or a liquid injection pipe for introducing a refrigerant into the compression mechanism are directly connected to the fixed scroll, it is necessary to have a structure in which the gas injection pipe or the liquid injection pipe is branched, and then the refrigerant is allowed to be introduced into the compression mechanism. Additionally, there is a problem of increasing the number of pipes that penetrate a sealed container of the compressor, increasing labor for processing of a penetration part, and increasing the number of portions where a countermeasure for refrigerant leakage is provided.
  • an object of the present invention is to provide a compressor, and a method for manufacturing a compressor, in which assembly performance can be improved while a structure is simplified in a case in which a gas injection pipe and a liquid injection pipe are installed.
  • a compressor according to an aspect of the present invention is defined in claim 1.
  • the refrigerant supplied from the injection pipe is distributed and supplied to the plurality of refrigerant flow passages formed in the cover member, in the refrigerant distribution flow passages formed on the discharge cover or the discharge cover side of the cover member.
  • the refrigerant distribution flow passage is provided in the cover member, so that it is possible to reduce the number of the injection pipes that penetrate the housing.
  • the refrigerant gas supplied from the gas injection pipe is distributed and supplied to the plurality of refrigerant gas flow passages formed in the cover member, in the refrigerant gas distribution flow passages formed on the discharge cover or the cover member.
  • the refrigerant liquid supplied from the liquid injection pipe is supplied to the refrigerant liquid flow passage formed in the cover member.
  • the refrigerant gas distribution flow passages are provided in the cover member, so that it is possible to reduce the number of the gas injection pipes that penetrate the housing.
  • the cover member may have: a first check valve that is installed on the second surface, and prevents reverse flow of the refrigerant gas supplied from each of the refrigerant gas flow passages; and a second check valve that is installed on the second surface, and prevents reverse flow of the refrigerant liquid supplied from the refrigerant liquid flow passage.
  • the compressor may further include: a discharge chamber formed between the housing and the discharge cover; and a connector pipe that is installed on a circumference of the liquid injection pipe, and houses the liquid injection pipe, wherein the connector pipe may have an end connected to the discharge cover, and isolate a space on a side of the discharge chamber from a space on a side of the compression mechanism.
  • the connector pipe is connected to the discharge cover, and the liquid injection pipe is disposed in the connector pipe. Therefore, the space on the high pressure discharge chamber side and the space on the low pressure compression mechanism side are isolated by the connector pipe, and therefore refrigerant leakage can be suppressed unlike a case in which the liquid injection pipe is connected to the discharge cover without providing the connector pipe.
  • a method for manufacturing the compressor according to another aspect of the present invention is defined in claim 4.
  • a refrigerating cycle 10 includes a scroll compressor 1 that compresses a refrigerant (fluid), a condenser 2 that radiates heat of the compressed refrigerant to the outside, a first expansion valve 3 that decompresses the refrigerant which flows out from the condenser 2, and is provided on a high pressure side, an economizer (gas-liquid separator) 4 that separates the decompressed refrigerant into a liquid refrigerant and a gas refrigerant, a second expansion valve 5 that further decompresses a liquid refrigerant, and is provided on a low pressure side, an evaporator 6 that absorbs heat by the decompressed refrigerant, an injection flow passage 7 that guides the gas refrigerant from the economizer 4 to the scroll compressor 1, an injection flow passage 8 that guides the liquid refrigerant from the condenser 2 to the scroll compressor 1, and the like.
  • a scroll compressor 1 that compresses a refrigerant (flu
  • the scroll compressor 1 is a hermetic type compressor, and is composed of a housing 11 having a sealed space therein, a scroll compression mechanism 12 that is disposed in the housing 11, and compresses a refrigerant taken in the sealed space, a rotating shaft 13 that transmits rotational force to the scroll compression mechanism 12, and an electric motor that revolves an orbit scroll 19 of the scroll compression mechanism 12 through the rotating shaft 13, as main components, as illustrated in Fig. 2 .
  • the housing 11 has a bottom sealed by a lower cover, and includes a vertically elongated cylindrical intermediate cover 14 at an upper part of the lower cover.
  • a discharge cover 15 and an upper cover 16 are provided at an upper part of the intermediate cover 14, and seal the housing 11, and a discharge chamber 17, to which compressed high pressure gas is discharged, is formed between this discharge cover 15 and the upper cover 16.
  • the scroll compression mechanism 12 is incorporated in the housing 11, and the electric motor composed of a stator and a rotor is installed below the scroll compression mechanism.
  • the stator is fixed and installed in the housing 11, so that the electric motor is incorporated, and the rotating shaft 13 is fixed to the rotor.
  • the scroll compression mechanism 12 includes a fixed scroll 18 fixed and installed in the housing 11, the orbit scroll 19 that is slidably supported, and engages with the fixed scroll 18 to form compression chambers 20, and the like.
  • a suction port that sucks a refrigerant is formed in a side surface of the housing 11 so as to communicate with the sealed space, and a discharge pipe 24 that communicates with the discharge chamber 17, and discharges compressed refrigerant gas is formed on a head top side of the upper cover 16.
  • the scroll compression mechanism 12 sucks refrigerant gas sucked into the housing 11 through the suction pipe and the suction port, from a suction port 21 on an outer peripheral side opened to the inside of the housing 11, into the compression chambers 20, and compresses the sucked refrigerant gas.
  • the compressed refrigerant gas is discharged into the discharge chamber 17 through a discharge port 22 provided at a central part of the fixed scroll 18, a refrigerant flow passage 30 provided in a block member 29, and a discharge port 23 provided in the discharge cover 15, and is further sent out to the outside of the compressor through the discharge pipe 24 provided in the upper cover 16 and communicated with the discharge chamber 17.
  • a gas injection pipe 25 that introduces intermediate pressure refrigerant gas into the compression chambers 20 of the scroll compression mechanism 12 is connected to the discharge cover 15 through the injection flow passage 7.
  • the gas injection pipe 25 is provided so as to penetrate the upper cover 16.
  • An outer pipe 46 is installed around the gas injection pipe 25, and the gas injection pipe 25 is connected to the upper cover 16 through the outer pipe 46.
  • the outer pipe 46 has one end connected to the gas injection pipe 25, and the other end opened to the inside of the discharge chamber 17.
  • a refrigerant gas flow passage 31 that allows refrigerant gas to flow through is formed in the discharge cover 15, and an opening of the refrigerant gas flow passage 31 faces the block member 29.
  • a refrigerant gas distribution flow passage 44 is formed in a surface on the discharge cover 15 of the block member 29.
  • a refrigerant gas distribution flow passage 45 is formed in a surface on the block member 29 of the discharge cover 15.
  • the refrigerant gas distribution flow passages 44, 45 are recessed grooves, and are annually formed.
  • the refrigerant gas distribution flow passages 44, 45 are connected to a plurality of refrigerant gas flow passages 32 formed in the block member 29.
  • the refrigerant gas that flows in the refrigerant gas flow passage 31 is supplied to the refrigerant gas distribution flow passages 44, 45. Then, the refrigerant gas supplied to the refrigerant gas distribution flow passages 44, 45 is distributed to the plurality of refrigerant gas flow passages 32 by the refrigerant gas distribution flow passages 44, 45.
  • the refrigerant gas distribution flow passages 44, 45 are provided in the discharge cover 15 and the block member 29, so that it is possible to reduce the number of the gas injection pipes 25 that penetrate the housing 11. Only any one of the refrigerant gas distribution flow passages 44, 45 may be formed.
  • the refrigerant gas is supplied to the compression chambers 20 through the gas injection pipe 25, the refrigerant gas flow passage 31 provided in the discharge cover 15, the refrigerant gas flow passages 32 provided in the block member 29, and gas injection ports 26 provided in the fixed scroll 18.
  • the refrigerant gas can be supplied to the compression chambers 20 through the gas injection pipe 25.
  • a liquid injection pipe 40 that introduces the refrigerant liquid into the compression chambers 20 of the scroll compression mechanism 12 is connected to the discharge cover 15 through the injection flow passage 8.
  • the liquid injection pipe 40 is provided so as to penetrate the upper cover 16 and the discharge cover 15.
  • a connector pipe 47 is installed around the liquid injection pipe 40, and an outer pipe 48 is installed around the connector pipe 47.
  • the liquid injection pipe 40 is connected to the upper cover 16 through the outer pipe 48.
  • the outer pipe 48 has one end connected to the liquid injection pipe 40, and the other end opened to the inside of the discharge chamber 17.
  • the liquid injection pipe 40 is connected to the discharge cover 15 through the connector pipe 47.
  • the connector pipe 47 has one end connected to the liquid injection pipe 40, and the other end opened to a low pressure space located below the discharge cover 15 while being connected to the discharge cover 15.
  • the connector pipe 47 has one end connected to the discharge cover 15, and isolates a space on the discharge chamber 17 side from a low pressure space on the scroll compression mechanism 12 side. Consequently, the connector pipe 47 is connected to the discharge cover 15, and the liquid injection pipe 40 is disposed inside the connector pipe 47. Therefore, the space on the high pressure discharge chamber 17 side and the space on the low pressure scroll compression mechanism 12 side are isolated by the connector pipe 47, and therefore refrigerant leakage can be suppressed unlike a case in which the liquid injection pipe 40 is connected to the discharge cover 15 without providing the connector pipe 47.
  • the refrigerant liquid is supplied to the compression chambers 20 through the liquid injection pipe 40, refrigerant liquid flow passages 41 provided in the block member 29, and liquid injection ports 42 provided in the fixed scroll 18. Consequently, the refrigerant liquid can be supplied to the compression chambers 20 through the liquid injection pipe 40.
  • Switching between introduction of the refrigerant gas through the gas injection pipe 25 and introduction of the refrigerant liquid through the liquid injection pipe 40 is performed by opening and closing of an electromagnetic valve (not illustrated) on the basis of a signal from a controller, for example.
  • the reed valve 27 defines the direction of the flow of the refrigerant only in one direction.
  • the reed valve 27 is provided, so that the refrigerant flows from each compression chamber 20 to the discharge chamber 17 side.
  • a retainer 33 that limits a movable range (opening upper limit) of the reed valve 27 is provided.
  • the retainer 33 can regulate such that the reed valve 27 is not opened too widely.
  • the retainer 33 is a member having high rigidity and unlikely to deform.
  • the reed valve 27 is a member elongated in one direction, and has an end having, for example, an arc shape.
  • the reed valve 27 has one end side fixed to the fixed scroll 18 by a bolt (not illustrated), and the other end side of the reed valve 27 capable of opening and closing with respect to the discharge port 22.
  • the retainer 33 is also a member elongated in one direction similarly to the reed valve 27, and has one end side fixed by a bolt along with the reed valve 27.
  • the fixed scroll 18 includes a substantially disk shaped end plate 18a, and a spiral wall body 18b erected on one side surface of the end plate 18a.
  • the orbit scroll 19 includes a substantially disk shaped end plate 19a, and a spiral wall body 19b erected on one side surface of the end plate 19a.
  • the respective spiral shapes of the wall bodies 18b, 19b are defined by using, for example, an involute curve or Archimedes' spiral curve.
  • the discharge port 22, the gas injection ports 26, and the liquid injection ports 42 are formed in the end plate 18a so as to each penetrate in the plate thickness direction.
  • the fixed scroll 18 and the orbit scroll 19 are engaged with each other such that the centers O 1 , O 2 thereof are separated by a turn radius p, and the phases of the wall bodies 18b, 19b are displaced by 180°, and are assembled such that slight clearances (tip clearances) in the height direction are present between tooth tips and tooth bottoms of the wall bodies 18b, 19b of the both scrolls 18, 19 at a normal temperature. Consequently, between the both scrolls 18, 19, a plurality of pairs of the compression chambers 20 formed so as to be surrounded by the end plates 18a, 19a and the wall bodies 18b, 19b are symmetrically formed with respect to the scroll centers.
  • the orbit scroll 19 revolves around the fixed scroll 18 by a rotation prevention mechanism such as an oldham ring.
  • the block member 29 is an example of a cover member, and is installed on a surface on the discharge cover 15 side of the fixed scroll 18 between the fixed scroll 18 and the discharge cover 15 by a bolt 35.
  • the refrigerant flow passage 30 the plurality of refrigerant gas flow passages 32 that allows the refrigerant to flow through from the gas injection pipe 25
  • the plurality of refrigerant liquid flow passages 41 that allow the refrigerant to flow through from the liquid injection pipe 40 are formed.
  • the refrigerant gas flow passages 32 and the refrigerant liquid flow passages 41 are formed in the block member 29 so as to penetrate from a surface on the discharge cover 15 side (first surface) to a surface on the fixed scroll 18 side (second surface).
  • recessed reed valve chambers 36, 43 are formed in the surface on the fixed scroll 18.
  • the refrigerant gas that flows in the gas injection pipe 25 is supplied to the refrigerant gas flow passages 31, 32, and thereafter supplied to the reed valve chambers 36.
  • the refrigerant liquid that flows in the liquid injection pipe 40 is supplied to the refrigerant liquid flow passages 41, and thereafter is supplied to the reed valve chambers 43.
  • each reed valve chamber 36 the gas injection port 26 of the fixed scroll 18 is opened.
  • the liquid injection port 42 of the fixed scroll 18 is opened.
  • Reed valves 37 housed in the reed valve chambers 36, 43 are fixed by bolts 38.
  • the reed valves 37 are sheet-like members, and are provided in outlets of the refrigerant gas flow passages 32 or the refrigerant liquid flow passages 41, and open and close the refrigerant gas flow passages 32 or the refrigerant liquid flow passages 41.
  • the reed valves 37 each define the direction of the flow of the refrigerant only in one direction.
  • Each reed valve 37 is provided, so that the refrigerant flows from the gas injection pipe 25 or the liquid injection pipe 40 to the compression chamber 20 side of the fixed scroll 18.
  • the reed valve 37 provided in the outlet of each refrigerant gas flow passage 32 is an example of the first check valve
  • the reed valve 37 provided in the outlet of each refrigerant liquid flow passage 41 is an example of the second check valve.
  • a retainer 39 that limits the movable range (opening upper limit) of each reed valve 37 is provided in the movable direction of the reed valve 37.
  • the reed valve 37 abuts on the retainer 39.
  • each retainer 39 can regulate such that the reed valve 37 is not opened too widely.
  • Each retainer 39 is a member having high rigidity and unlikely to deform.
  • Each reed valve 37 is a member elongated in one direction, and has an end having, for example, an arc shape.
  • Each reed valve 37 has one end side fixed to the block member 29 by the bolt 38, and the other end side of the reed valve 37 capable of opening and closing with respect to the refrigerant gas flow passage 32 or the refrigerant liquid flow passages 41.
  • Each retainer 39 is also a member elongated in one direction similarly to the reed valve 37, and has one end side fixed to the reed valve 37 by the bolt 38.
  • annular groove 49 is formed on a surface on the discharge cover 15 side of the block member 29.
  • the groove 49 is formed around the refrigerant flow passage 30 formed in the block member 29 so as to surround the refrigerant flow passage 30.
  • the refrigerant gas flow passages 32 are formed in the groove 49.
  • An annular protrusion 50 is formed on a surface on the block member 29 side of the discharge cover 15. When the block member 29 and the discharge cover 15 are combined with each other, the protrusion 50 is in a state of being inserted into the groove 49 of the block member 29. In a portion where the protrusion 50 is formed, the refrigerant gas flow passage 31 is disposed.
  • an end of the gas injection pipe 25 is connected to the discharge cover 15.
  • the refrigerant gas flows through the gas injection pipe 25, and the refrigerant gas that flows in the gas injection pipe 25 is supplied to the refrigerant gas flow passages 31, 32, and thereafter supplied to the reed valve chambers 36, as illustrated by the hatched portions of Fig. 3 .
  • the refrigerant gas is introduced into the compression chambers 20 of the scroll compression mechanism 12 through the gas injection ports 26 formed in the fixed scroll 18.
  • An end of the liquid injection pipe 40 is connected to the block member 29.
  • the refrigerant liquid flows through the liquid injection pipe 40, and the refrigerant liquid that flows in the liquid injection pipe 40 is supplied to the refrigerant liquid flow passages 41, and thereafter supplied to the reed valve chambers 43, as illustrated by the hatched portions of Fig. 4 .
  • the refrigerant liquid is introduced into the compression chambers 20 of the scroll compression mechanism 12 through the liquid injection ports 42 formed in the fixed scroll 18.
  • the housing 11 is assembled before the gas injection pipe 25 and the liquid injection pipe 40 are connected to internal components. That is, the components including the scroll compression mechanism 12, the electric motor, and the like are disposed in the housing 11, and welding connection of the intermediate cover 14 of the housing 11, and the discharge cover 15, and welding connection between the discharge cover 15 and the upper cover 16 are performed in a state in which the gas injection pipe 25 and the liquid injection pipe 40 are not connected.
  • the gas injection pipe 25 is pressed into the discharge cover 15 from the outside of the upper cover 16, and the gas injection pipe 25 is connected to the discharge cover 15. Additionally, the outer pipe 46 is provided around the gas injection pipe 25, and the gas injection pipe 25 and the upper cover 16 are connected to each other.
  • the liquid injection pipe 40 is pressed into the block member 29 from the outside of the upper cover 16, and the liquid injection pipe 40 is connected to the block member 29. Additionally, the connector pipe 47 and the outer pipe 48 are provided around the liquid injection pipe 40, the connector pipe 47 is connected to the discharge cover 15 and the liquid injection pipe 40, and the outer pipe 48 is connected to the upper cover 16 and the liquid injection pipe 40.
  • the gas injection pipe 25 and the liquid injection pipe 40 are pressed in directions parallel to the axial direction of the rotating shaft 13.
  • the gas injection pipe 25 and the liquid injection pipe 40 are pressed into the internal components, so that it is possible to complete connection between the gas injection pipe 25 and the liquid injection pipe 40, and the internal components.
  • the housing 11 is first assembled before the gas injection pipe 25 and the liquid injection pipe 40 are connected to the internal components. Therefore, in a case in which welding around the housing 11 is performed, it is not necessary to cure the gas injection pipe 25 and the liquid injection pipe 40 to be provided so as to protrude from the housing 11. Therefore, welding work at the time of assembling the housing 11 is facilitated.
  • the gas injection pipe 25 is connected to the discharge cover 15, and the refrigerant gas distribution flow passages 44, 45 are formed.
  • the present invention is not limited to this example. That is, although not illustrated, while the liquid injection pipe 40 is not connected to the gas injection pipe 25, but connected to the discharge cover 15, a refrigerant liquid distribution flow passage may be annularly formed in the discharge cover 15 and/or the block member 29 similarly to the refrigerant gas distribution flow passages 44, 45 of the aforementioned embodiment, and refrigerant liquid may be distributed in the plurality of refrigerant liquid flow passages 41.
EP19177971.9A 2018-06-05 2019-06-03 Compressor and method for manufacturing compressor Active EP3578823B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018107595A JP7123636B2 (ja) 2018-06-05 2018-06-05 圧縮機及び圧縮機の製造方法

Publications (2)

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EP3578823A1 EP3578823A1 (en) 2019-12-11
EP3578823B1 true EP3578823B1 (en) 2021-03-03

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EP19177971.9A Active EP3578823B1 (en) 2018-06-05 2019-06-03 Compressor and method for manufacturing compressor

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JP (1) JP7123636B2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4325055A1 (de) * 2022-08-16 2024-02-21 BITZER Kühlmaschinenbau GmbH Scrollmaschine mit einspritzung sowie kälteanlage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7203796B2 (ja) 2020-09-30 2023-01-13 三菱重工サーマルシステムズ株式会社 スクロール圧縮機
JP7225178B2 (ja) * 2020-10-06 2023-02-20 三菱重工サーマルシステムズ株式会社 熱源機及びその制御方法
WO2024069829A1 (ja) * 2022-09-29 2024-04-04 日立ジョンソンコントロールズ空調株式会社 スクロール圧縮機及び空気調和機

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2618501B2 (ja) 1989-10-30 1997-06-11 株式会社日立製作所 低温用スクロール式冷凍装置
JPH11107949A (ja) * 1997-10-06 1999-04-20 Matsushita Electric Ind Co Ltd スクロール圧縮機
JP5314326B2 (ja) 2008-05-30 2013-10-16 三菱重工業株式会社 冷媒圧縮機
JP6460595B2 (ja) 2014-12-04 2019-01-30 株式会社デンソー 圧縮機
JP6710545B2 (ja) 2016-03-04 2020-06-17 三菱重工サーマルシステムズ株式会社 圧縮機

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4325055A1 (de) * 2022-08-16 2024-02-21 BITZER Kühlmaschinenbau GmbH Scrollmaschine mit einspritzung sowie kälteanlage

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EP3578823A1 (en) 2019-12-11
JP7123636B2 (ja) 2022-08-23
JP2019210867A (ja) 2019-12-12

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