EP3019750A2 - Screw compressor with economizer port - Google Patents

Screw compressor with economizer port

Info

Publication number
EP3019750A2
EP3019750A2 EP14742105.1A EP14742105A EP3019750A2 EP 3019750 A2 EP3019750 A2 EP 3019750A2 EP 14742105 A EP14742105 A EP 14742105A EP 3019750 A2 EP3019750 A2 EP 3019750A2
Authority
EP
European Patent Office
Prior art keywords
compressor
rotor
economizer
housing
housing wall
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.)
Granted
Application number
EP14742105.1A
Other languages
German (de)
French (fr)
Other versions
EP3019750B1 (en
Inventor
Peter J. Pileski
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.)
Carrier Corp
Original Assignee
Carrier Corp
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 Carrier Corp filed Critical Carrier Corp
Publication of EP3019750A2 publication Critical patent/EP3019750A2/en
Application granted granted Critical
Publication of EP3019750B1 publication Critical patent/EP3019750B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
    • F25B1/047—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of screw type
    • 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
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/086—Carter
    • 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
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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

Definitions

  • the subject matter disclosed herein relates to refrigeration systems. More specifically, the subject matter disclosed herein relates to screw compressors for refrigeration systems.
  • Refrigeration systems typically include a compressor delivering compressed refrigerant to a condenser. From the condenser, the refrigerant travels to an expansion valve, and then to an evaporator. From the evaporator, the refrigerant returns to the compressor to be compressed.
  • an economizer is often included between the condenser and evaporator, more specifically between the condenser and expansion valve.
  • the economizer is a heat exchanger that returns a portion of the refrigerant flowing through the system as a gas to the compressor, where it is injected into the compressor at a selected location via an economizer port.
  • the economizer port is a slot milled in the rotor housing from an exterior of the housing, or formed in a rotor housing by casting.
  • the typical slot allows for unintended and undesirable leakage between adjacent lobes of the screw rotor as the lobe passes the slot. This leakage negatively impacts compressor performance, and limits slot width and placement of the slot in the compressor.
  • slots are typically only located at the female rotor of a two rotor screw compressor due to a thicker sealing line present in the female rotor, thus reducing a potential for leakage.
  • a screw compressor in one embodiment, includes a screw compressor rotor.
  • the rotor includes a helical flute extending outwardly from a rotor axis.
  • a compressor housing surrounds the rotor and including a suction port and a discharge port.
  • the housing has an inner housing wall abutting the rotor and an outer housing wall forming an exterior of the compressor.
  • a housing pocket is located between the outer housing wall and the inner housing wall.
  • An economizer port extends from the housing pocket through the inner housing wall to direct a flow of gaseous refrigerant into the compressor.
  • a refrigerant system in another embodiment, includes an evaporator and a compressor operably connected to the evaporator.
  • the compressor includes a screw compressor rotor.
  • the rotor includes a helical flute extending outwardly from a rotor axis.
  • a compressor housing surrounds the rotor and includes a suction port to receive refrigerant from the evaporator and a discharge port to convey refrigerant toward a condenser.
  • the housing has an inner housing wall abutting the rotor and an outer housing wall forming an exterior of the compressor.
  • a housing pocket is located between the outer housing wall and the inner housing wall.
  • An economizer port extends from the housing pocket through the inner housing wall to direct a flow of gaseous refrigerant into the compressor from an economizer.
  • FIG. 1 is a schematic view of an embodiment of a refrigerant system
  • FIG. 2 is a cross-sectional view of an embodiment of a screw compressor
  • FIG. 3 is a cross-sectional view of an embodiment of a screw compressor
  • FIG. 4 is a plan view of an economizer port in an embodiment of a screw compressor.
  • FIG. 5 is a cross-sectional view of another embodiment of a screw compressor.
  • FIG. 1 Shown in FIG. 1 is a schematic of an embodiment of a refrigerant system 10.
  • the refrigerant system 10 includes a screw compressor 12.
  • An evaporator 14, in some embodiments a flooded style evaporator 14, delivers a flow of refrigerant to the compressor 12 through a passage 16.
  • the refrigerant flows through line 18 to a condenser 20.
  • Compressed, gaseous refrigerant is cooled in the condenser 20, transferred into a liquid phase, and passed through an expansion valve 24 on its way to the evaporator 14 through conduit 22.
  • An economizer 26 is located between the evaporator 14 and the condenser 20, in some embodiments between the condenser 20 and the expansion valve 24 along conduit 22.
  • the economizer 26 may be, for example, a heat exchange type or flash type economizer 26.
  • Gaseous refrigerant is directed from the economizer 26 to the compressor 12 via economizer conduit 28, where the gaseous refrigerant is injected into the compressor 12 at economizer port 30.
  • the compressor 12 includes two compressor rotors 32 disposed in a compressor housing 34.
  • the compressor rotors 32 each include a plurality of helical rotor flutes 36.
  • the compressor rotors 32 are arranged in parallel such that rotor axes 38 are parallel and the rotor flutes 36 intermesh.
  • the compressor 12 incudes two compressor rotors 32, known in the art as a male rotor 32 and a female rotor 32.
  • the compressor 12 includes other numbers of rotors 32, for example, three rotors 32.
  • the compressor rotors 32 are located inside of the housing 34, which also includes a- suction port 40 through which refrigerant flowed from the evaporator 14, and a discharge port 42 through which compressed refrigerant is discharged toward the condenser 20.
  • the suction port 40 and the discharge port 42 are located at opposite axial ends of the housing 34.
  • the compressor 12 includes an economizer port 30 through which gaseous refrigerant is urged from the economizer 26.
  • the housing 34 is formed by casting.
  • An integral economizer pocket 44 is formed or cored in the housing 34 during casting of the housing 34.
  • the economizer pocket 44 is a space located radially between a housing inner wall 46 that abuts the rotors 32, and a housing outer wall 48 that forms the exterior of the housing 34. Forming the pocket 44 leaves a relatively thin housing inner wall 46, in some embodiments, 10-15 millimeters in thickness.
  • the economizer port 30 comprises an outer wall opening 50 in the outer wall 48, the pocket 44 and an inner wall opening 52 in the inner wall 46.
  • a metallic housing 34 may be formed from other processes, such as machining, while the housing 34 may also be formed of other, non-metallic, materials such as composites or plastics.
  • the inner wall opening 52 is slot shaped, with a lateral side 54 of the opening 52 extending substantially parallel to the rotor flutes 36.
  • the inner wall opening 52 has a width between 1/32" and 1 ⁇ 4" (about 0.79 to 6.35 millimeters).
  • the inner wall opening 52 has a length between about 1.9 inches and 3.5 inches (about 50 to 90 millimeters).
  • the inner wall opening 52 may have other shapes, such as circular or triangular.
  • the inner wall 46 is sufficiently thin, due to inclusion of the pocket 44 in the housing 34, to allow the inner wall opening 52 to be formed by a secondary process, such as plasma cutting or water jet cutting. These processes allow an inner wall opening 52 of the economizer port 30 to be significantly narrower than a typical economizer port formed integral with the casting or via profile milling; the narrower inner wall opening 52 resulting in reduced leakage in the compressor 12.
  • multiple economizer ports 30 may be included in the compressor 12, at different locations in the compressor 12.
  • economizer ports 30 may be located at either or both of the male or female rotors 32, with the thinner profile of the economizer port 30 allowing for location at the male rotor 32, even though a thinner sealing line typically exists at the male rotor 32.
  • Multiple economizer ports 30 improves compressor performance by allowing the refrigeration system 10 to direct gas from the economizer 26 to selected economizer port(s) 30 depending on the operating conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A screw compressor includes a screw compressor rotor. The rotor includes a helical flute extending outwardly from a rotor axis. A compressor housing surrounds the rotor and including a suction port and a discharge port. The housing has an inner housing wall abutting the rotor and an outer housing wall forming an exterior of the compressor. A housing pocket is located between the outer housing wall and the inner housing wall. An economizer port extends from the housing pocket through the inner housing wall to direct a flow of gaseous refrigerant into the compressor.

Description

SCREW COMPRESSOR WITH ECONOMIZER PORT
BACKGROUND
[0001] The subject matter disclosed herein relates to refrigeration systems. More specifically, the subject matter disclosed herein relates to screw compressors for refrigeration systems.
[0002] Refrigeration systems typically include a compressor delivering compressed refrigerant to a condenser. From the condenser, the refrigerant travels to an expansion valve, and then to an evaporator. From the evaporator, the refrigerant returns to the compressor to be compressed. To increase efficiency of the system, an economizer is often included between the condenser and evaporator, more specifically between the condenser and expansion valve. The economizer is a heat exchanger that returns a portion of the refrigerant flowing through the system as a gas to the compressor, where it is injected into the compressor at a selected location via an economizer port.
[0003] In some compressors, the economizer port is a slot milled in the rotor housing from an exterior of the housing, or formed in a rotor housing by casting. The typical slot, however, allows for unintended and undesirable leakage between adjacent lobes of the screw rotor as the lobe passes the slot. This leakage negatively impacts compressor performance, and limits slot width and placement of the slot in the compressor. For example, slots are typically only located at the female rotor of a two rotor screw compressor due to a thicker sealing line present in the female rotor, thus reducing a potential for leakage.
BRIEF SUMMARY
[0004] In one embodiment, a screw compressor includes a screw compressor rotor. The rotor includes a helical flute extending outwardly from a rotor axis. A compressor housing surrounds the rotor and including a suction port and a discharge port. The housing has an inner housing wall abutting the rotor and an outer housing wall forming an exterior of the compressor. A housing pocket is located between the outer housing wall and the inner housing wall. An economizer port extends from the housing pocket through the inner housing wall to direct a flow of gaseous refrigerant into the compressor.
[0005] In another embodiment, a refrigerant system includes an evaporator and a compressor operably connected to the evaporator. The compressor includes a screw compressor rotor. The rotor includes a helical flute extending outwardly from a rotor axis. A compressor housing surrounds the rotor and includes a suction port to receive refrigerant from the evaporator and a discharge port to convey refrigerant toward a condenser. The housing has an inner housing wall abutting the rotor and an outer housing wall forming an exterior of the compressor. A housing pocket is located between the outer housing wall and the inner housing wall. An economizer port extends from the housing pocket through the inner housing wall to direct a flow of gaseous refrigerant into the compressor from an economizer.
[0006] These and other advantages and features will become more apparent from the following description taken in conjunction with the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] The subject matter, which is regarded as the invention, is particularly pointed out and distinctly claimed in the claims at the conclusion of the specification. The foregoing and other features, and advantages of the invention are apparent from the following detailed description taken in conjunction with the accompanying drawings in which:
[0008] FIG. 1 is a schematic view of an embodiment of a refrigerant system;
[0009] FIG. 2 is a cross-sectional view of an embodiment of a screw compressor;
[0010] FIG. 3 is a cross-sectional view of an embodiment of a screw compressor;
[0011] FIG. 4 is a plan view of an economizer port in an embodiment of a screw compressor; and
[0012] FIG. 5 is a cross-sectional view of another embodiment of a screw compressor.
[0013] The detailed description explains embodiments of the invention, together with advantages and features, by way of example with reference to the drawing.
DETAILED DESCRIPTION
[0014] Shown in FIG. 1 is a schematic of an embodiment of a refrigerant system 10. The refrigerant system 10 includes a screw compressor 12. An evaporator 14, in some embodiments a flooded style evaporator 14, delivers a flow of refrigerant to the compressor 12 through a passage 16. From the compressor 12, the refrigerant flows through line 18 to a condenser 20. Compressed, gaseous refrigerant is cooled in the condenser 20, transferred into a liquid phase, and passed through an expansion valve 24 on its way to the evaporator 14 through conduit 22.
[0015] An economizer 26 is located between the evaporator 14 and the condenser 20, in some embodiments between the condenser 20 and the expansion valve 24 along conduit 22. The economizer 26 may be, for example, a heat exchange type or flash type economizer 26. Gaseous refrigerant is directed from the economizer 26 to the compressor 12 via economizer conduit 28, where the gaseous refrigerant is injected into the compressor 12 at economizer port 30.
[0016] Referring to FIG. 2, an embodiment of the screw compressor 12 is shown. The compressor 12 includes two compressor rotors 32 disposed in a compressor housing 34. The compressor rotors 32 each include a plurality of helical rotor flutes 36. The compressor rotors 32 are arranged in parallel such that rotor axes 38 are parallel and the rotor flutes 36 intermesh. In the embodiment shown, the compressor 12 incudes two compressor rotors 32, known in the art as a male rotor 32 and a female rotor 32. In other embodiments the compressor 12 includes other numbers of rotors 32, for example, three rotors 32. The compressor rotors 32 are located inside of the housing 34, which also includes a- suction port 40 through which refrigerant flowed from the evaporator 14, and a discharge port 42 through which compressed refrigerant is discharged toward the condenser 20. In some embodiments, the suction port 40 and the discharge port 42 are located at opposite axial ends of the housing 34.
[0017] As stated above, the compressor 12 includes an economizer port 30 through which gaseous refrigerant is urged from the economizer 26. Referring to FIGs. 3 and 4, the housing 34 is formed by casting. An integral economizer pocket 44 is formed or cored in the housing 34 during casting of the housing 34. The economizer pocket 44 is a space located radially between a housing inner wall 46 that abuts the rotors 32, and a housing outer wall 48 that forms the exterior of the housing 34. Forming the pocket 44 leaves a relatively thin housing inner wall 46, in some embodiments, 10-15 millimeters in thickness. The economizer port 30 comprises an outer wall opening 50 in the outer wall 48, the pocket 44 and an inner wall opening 52 in the inner wall 46. In alternative embodiments, a metallic housing 34 may be formed from other processes, such as machining, while the housing 34 may also be formed of other, non-metallic, materials such as composites or plastics.
[0018] Referring to FIG. 4, the inner wall opening 52 is slot shaped, with a lateral side 54 of the opening 52 extending substantially parallel to the rotor flutes 36. In some embodiments, the inner wall opening 52 has a width between 1/32" and ¼" (about 0.79 to 6.35 millimeters). In some embodiments, the inner wall opening 52 has a length between about 1.9 inches and 3.5 inches (about 50 to 90 millimeters). In other embodiments, the inner wall opening 52 may have other shapes, such as circular or triangular. The inner wall 46 is sufficiently thin, due to inclusion of the pocket 44 in the housing 34, to allow the inner wall opening 52 to be formed by a secondary process, such as plasma cutting or water jet cutting. These processes allow an inner wall opening 52 of the economizer port 30 to be significantly narrower than a typical economizer port formed integral with the casting or via profile milling; the narrower inner wall opening 52 resulting in reduced leakage in the compressor 12.
[0019] In another embodiment, as shown in FIG. 5, multiple economizer ports 30 may be included in the compressor 12, at different locations in the compressor 12. For example, economizer ports 30 may be located at either or both of the male or female rotors 32, with the thinner profile of the economizer port 30 allowing for location at the male rotor 32, even though a thinner sealing line typically exists at the male rotor 32. Multiple economizer ports 30 improves compressor performance by allowing the refrigeration system 10 to direct gas from the economizer 26 to selected economizer port(s) 30 depending on the operating conditions.
[0020] While the invention has been described in detail in connection with only a limited number of embodiments, it should be readily understood that the invention is not limited to such disclosed embodiments. Rather, the invention can be modified to incorporate any number of variations, alterations, substitutions or equivalent arrangements not heretofore described, but which are commensurate with the spirit and scope of the invention. Additionally, while various embodiments of the invention have been described, it is to be understood that aspects of the invention may include only some of the described embodiments. Accordingly, the invention is not to be seen as limited by the foregoing description, but is only limited by the scope of the appended claims.

Claims

CLAIMS:
1. A screw compressor comprising:
a screw compressor rotor, the rotor including a helical flute extending outwardly from a rotor axis;
a compressor housing surrounding the rotor and including a suction port and a discharge port, the housing having an inner housing wall abutting the rotor and an outer housing wall forming an exterior of the compressor, a housing pocket disposed between the outer housing wall and the inner housing wall; and
an economizer port extending from the housing pocket through the inner housing wall to direct a flow of gaseous refrigerant into the compressor.
2. The screw compressor of Claim 1, wherein the economizer port is slot shaped and extends circumferentially parallel to the helical flute.
3. The screw compressor of Claim 1, wherein a width of the economizer port is between 1 millimeter and 6 millimeters.
4. The screw compressor of Claim 1, comprising at least two rotors disposed in the housing.
5. The screw compressor of Claim 4, wherein the helical flutes of the at least two rotors intermesh.
6. The screw compressor of Claim 1, comprising two or more economizer ports extending through the inner housing wall.
7. The screw compressor of Claim 1, wherein the economizer port is formed by one of plasma cutting or water jet.
8. A refrigerant system comprising:
an evaporator;
a compressor operably connected to the evaporator, the compressor including: a screw compressor rotor, the rotor including a helical flute extending outwardly from a rotor axis;
a compressor housing surrounding the rotor and including a suction port to receive refrigerant from the evaporator and a discharge port to convey refrigerant toward a condenser, the housing having an inner housing wall abutting the rotor and an outer housing wall forming an exterior of the compressor, a housing pocket disposed between the outer housing wall and the inner housing wall; and an economizer port extending from the housing pocket through the inner housing wall to direct a flow of gaseous refrigerant into the compressor from an economizer.
9. The refrigerant system of Claim 8, wherein the economizer is disposed between the condenser and the evaporator.
10. The refrigerant system of Claim 8, wherein the economizer port is slot shaped and extends circumferentially parallel to the helical flute.
11. The refrigerant system of Claim 8, wherein a width of the economizer port is between 1 millimeter and 6 millimeters.
12. The refrigerant system of Claim 8, comprising at least two rotors disposed in the housing.
13. The refrigerant system of Claim 12, wherein the helical flutes of the at least two rotors intermesh.
14. The refrigerant system of Claim 8, comprising two or more economizer ports extending through the inner housing wall.
15. The refrigerant system of Claim 8, wherein the economizer port is formed by one of plasma cutting or water jet.
EP14742105.1A 2013-07-10 2014-06-30 Screw compressor with economizer port Active EP3019750B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361844526P 2013-07-10 2013-07-10
PCT/US2014/044859 WO2015006081A2 (en) 2013-07-10 2014-06-30 Screw compressor with economizer port

Publications (2)

Publication Number Publication Date
EP3019750A2 true EP3019750A2 (en) 2016-05-18
EP3019750B1 EP3019750B1 (en) 2020-11-04

Family

ID=51213042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14742105.1A Active EP3019750B1 (en) 2013-07-10 2014-06-30 Screw compressor with economizer port

Country Status (5)

Country Link
US (1) US20160161153A1 (en)
EP (1) EP3019750B1 (en)
CN (1) CN105518304B (en)
ES (1) ES2829828T3 (en)
WO (1) WO2015006081A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170080354A1 (en) * 2015-01-20 2017-03-23 Artisan Industries Inc. Thin-Film Evaporator with Screw Outfeed
RU2723469C2 (en) 2015-08-11 2020-06-11 Кэрриер Корпорейшн Compressor, steam compression plant and methods of their operation and assembly
US10808969B2 (en) 2015-08-11 2020-10-20 Carrier Corporation Screw compressor economizer plenum for pulsation reduction
CN108138775B (en) 2015-10-02 2020-11-20 开利公司 Screw compressor resonator array
US10895259B2 (en) * 2018-04-20 2021-01-19 Trane International Inc. Screw compressor having synchronized economizer ports
RU199030U1 (en) * 2020-04-21 2020-08-07 Леонид Григорьевич Кузнецов Oil-injected single rotor screw compressor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5269667A (en) * 1993-02-24 1993-12-14 Ingersoll-Rand Company Removabe discharge port plate for a compressor
US5603227A (en) * 1995-11-13 1997-02-18 Carrier Corporation Back pressure control for improved system operative efficiency
US5899091A (en) * 1997-12-15 1999-05-04 Carrier Corporation Refrigeration system with integrated economizer/oil cooler
JP2002227788A (en) * 2001-01-31 2002-08-14 Hitachi Industries Co Ltd Screw compressor with air dryer
US6718781B2 (en) * 2001-07-11 2004-04-13 Thermo King Corporation Refrigeration unit apparatus and method
WO2006041494A1 (en) * 2004-09-30 2006-04-20 Carrier Corporation Screw compressor seal
US7156624B2 (en) * 2004-12-09 2007-01-02 Carrier Corporation Compressor sound suppression

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2015006081A3 *

Also Published As

Publication number Publication date
CN105518304B (en) 2018-07-27
WO2015006081A2 (en) 2015-01-15
EP3019750B1 (en) 2020-11-04
CN105518304A (en) 2016-04-20
US20160161153A1 (en) 2016-06-09
WO2015006081A3 (en) 2015-05-14
ES2829828T3 (en) 2021-06-02

Similar Documents

Publication Publication Date Title
EP3019750B1 (en) Screw compressor with economizer port
JP2012026436A (en) Compressor and cooling method thereof
EP2992279B1 (en) Low leakage seal for low pressure system
US20150345833A1 (en) Economizer injection assembly and method
US11428239B2 (en) Compressor suction pipe, compression unit, and chiller
US10578108B2 (en) Electric compressor
CN111295518B (en) Liquid-cooled screw compressor
HK1213975A1 (en) Refrigerator
US10302087B2 (en) Compressor exhaust structure, screw compressor and air-conditioning unit having same
EP3951301A1 (en) Heat exchanger and refrigeration cycle device
JP6653157B2 (en) Return channel forming part of centrifugal compression machine, centrifugal compression machine
WO2017045411A1 (en) Screw compressor and machine body thereof
US11248613B2 (en) Centrifugal compressor
CN110454440A (en) A kind of compressor for cooling cycle system
KR20130055104A (en) Air conditioner pipe for vehicle
EP2910875B1 (en) Oil separator
JP2014137008A (en) Compressor and refrigeration cycle device
WO2019073584A1 (en) Compressor housing and turbocharger provided with said compressor housing
JP2015175281A (en) compressor
JP2018502254A (en) Oil injection vacuum pump element
CN206207812U (en) Coolant flow divider
JP6418386B2 (en) Rotary compressor
CN104728116B (en) Rotary compressor and air conditioner with same
CN110388319B (en) Screw compressor with synchronous economizer port
CN114087185A (en) Variable-capacity rotor type compressor and air conditioner

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20160113

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20181122

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20200731

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1331174

Country of ref document: AT

Kind code of ref document: T

Effective date: 20201115

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602014071987

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1331174

Country of ref document: AT

Kind code of ref document: T

Effective date: 20201104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210304

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210204

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210304

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210204

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2829828

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20210602

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602014071987

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20210805

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20210630

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20210630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210630

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210630

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210630

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210304

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20220523

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20140630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20230701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201104

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20240701

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20250520

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20250520

Year of fee payment: 12