WO1994025807A1 - Compresseur de refrigeration - Google Patents

Compresseur de refrigeration Download PDF

Info

Publication number
WO1994025807A1
WO1994025807A1 PCT/AU1993/000460 AU9300460W WO9425807A1 WO 1994025807 A1 WO1994025807 A1 WO 1994025807A1 AU 9300460 W AU9300460 W AU 9300460W WO 9425807 A1 WO9425807 A1 WO 9425807A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
cylinder
housing
rotor
compressor
Prior art date
Application number
PCT/AU1993/000460
Other languages
English (en)
Inventor
Elias Noja
Original Assignee
Elias Noja
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 Elias Noja filed Critical Elias Noja
Priority to AU49364/93A priority Critical patent/AU672434B2/en
Priority to EP93918806A priority patent/EP0746732A4/fr
Publication of WO1994025807A1 publication Critical patent/WO1994025807A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/121—Casings
    • 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
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/0085—Prime movers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating

Definitions

  • This invention relates to a refrigeration compressor.
  • the invention has particular but not exclusive application to an electric motor driven refrigeration compressor and for illustrative purposes reference will be made to such an application.
  • the invention has particular application where an electric motor is included within a closed refrigerant system in circumstances where it is preferable that access to the motor for repairs and/or modification be available without the necessity of entering the closed refrigerant system.
  • a compressor in the refrigerant circuit is driven by a belt or shaft from a motor external to the refrigerant circuit with the shaft entering the refrigerant circuit through a gland seal.
  • Such arrangements allow the refrigerant to leak from the system in the event of seal malfunction.
  • Compressors for some other known refrigeration systems such as domestic and commercial refrigerators, have an electric motor located within a sealed unit from which a discharge line feeds condensed refrigerant and to which the expanded low pressure refrigerant is returned.
  • the refrigerant in known compressors of this type is thus in contact with the electric motor and the coolant oil therefor and in contact with lubrication oil for the compressor. This contact also leads to contamination of the refrigerant.
  • a prior art compressor has addressed these problems by interposing a sleeve in the airgap between the stator and rotor.
  • a sleeve in the airgap between the stator and rotor.
  • such sleeves are very thin and consequently can distend and fail when the refrigerant gases are pressurised. It is required that the compressor sump be depressurised before a stator can be removed from such a sleeve for replacement.
  • the thin sleeve can be perforated.
  • a refrigeration compressor assembly including:- a housing having input means for receiving refrigerant for compression and output means for returning compressed refrigerant; compressor means mounted in the housing; an electric motor supported by the housing and having a rotor and a stator, the rotor being coupled to the compressor means for rotation thereof; an input refrigerant circuit establishing fluid communication between the input means and the compressor input; an output refrigerant circuit establishing fluid communication between the output means and the compressor output, and substantially rigid isolating means for isolating the refrigerant from the stator.
  • the isolating means includes a sealed refrigerant unit within the housing.
  • the compressor means, the input refrigerant circuit and the output refrigerant circuit constitute the sealed refrigerant unit.
  • the assembly may include an expansion chamber for expanding the refrigerant prior to compression.
  • the expansion chamber may be exterior of and in fluid communication with the housing or it can be included within the housing.
  • the input refrigerant circuit includes an expansion chamber within the housing, the expansion chamber including the input means and an expansion chamber outlet in sealed fluid communication with the compressor means.
  • the expansion chamber may include a sump and the expansion chamber outlet may be adapted to drain the sump.
  • the isolating means may also include a substantially rigid isolation assembly forming with the housing a sealed unit about the compressor means and the rotor.
  • the stator of the electric motor may be mounted independently of the compressor assembly.
  • both the stator and the compressor assembly can be fixedly mounted relative to each other by mounting on a common support.
  • the stator is supported by the housing to enclose the isolation assembly.
  • the housing includes mounting means for mounting the stator of the electric motor to enclose the isolation assembly.
  • the isolation assembly includes a substantially rigid cylinder closed at one end thereof and open at the other end for receiving the rotor therein, the cylinder being adapted to abut the stator to form an extension thereof, the gap between the rotor and the inner surface of the cylinder constituting an airgap for the electric motor.
  • the cylinder may be made from a non-magnetic material and in one embodiment the cylinder is made of brass. Alternatively the cylinder may be made from a suitable plastics material. However it is preferred that the cylinder includes alternating longitudinally extending strip-like portions of ferro-magnetic material and non ⁇ magnetic material, the longitudinally extending strip-like portions of ferro-magnetic material being adapted to juxtapose the pole pieces of the stator when the stator is positioned about the cylinder.
  • the isolation assembly may be supported on the stator or can be adapted for mounting on a support member which also supports the stator and/or the rotor. It is preferred that the isolation assembly includes mounting means adjacent the open end of the cylinder for mounting the cylinder relative to the stator and the rotor. Suitably the mounting means are adapted to mount the cylinder in the housing to extend outwardly thereof.
  • the isolation assembly may also include bearing means on the inner surface of the closed end of the cylinder for supporting the shaft of the rotor.
  • this invention resides broadly in an electric motor-driven refrigeration compressor assembly including an isolation assembly adapted to abut the stator of the electric motor to form an extension thereof, the gap between the rotor and the inner surface of the cylinder constituting an airgap for the electric motor, the isolation assembly including:- a substantially rigid cylinder closed at one end thereof and open at the other end for receiving the rotor therein, the cylinder including alternating longitudinally extending strip-like portions of ferro-magnetic material and non-magnetic material, the longitudinally extending strip-like portions of ferro-magnetic material being adapted to juxtapose the pole pieces of the stator when the stator is positioned about the cylinder; and mounting means adjacent the open end for mounting the cylinder relative to the stator and the rotor.
  • FIGS 1 and 2 are representative illustrations of known compressor assemblies for use with a refrigerator
  • FIG 3 is an illustration of a compressor assembly having a sealed refrigerant unit within the compressor housing
  • FIG 4 is an illustration of a compressor assembly having an electric motor including a divider in accordance with the invention and also having a sealed refrigerant unit within the compressor housing;
  • FIG 5 is a sectional elevation of a compressor assembly having an electric motor including a divider in accordance with the invention.
  • FIG 6 is a perspective view of the divider illustrated in FIG 5;
  • FIG 7 is a perspective view of an alternative embodiment of a divider in accordance with the invention.
  • FIG 8 is a perspective view of the cylinder portion of the divider illustrated in FIG 7;
  • FIGS 9 and 10 are sectional elevations of other compressor assemblies having an electric motor with a divider in accordance with the invention.
  • FIGS 11, 12 and 13 are sectional elevations illustrating modifications to a stator assembly for use with the invention
  • FIGS 14, 15, 18 and 19 illustrate alternative embodiments (without the end cap) of the cylinder portion of the divider.
  • FIGS 16 and 17 illustrate the component portions used in assembling the cylinder illustrated in FIG 18. DETAILED DESCRIPTION OF THE INVENTION
  • a known sealed unit compressor 10 has a compressor 11 and an electric motor 12 for driving the compressor through shaft 13.
  • the compressor is mounted to the underside of a refrigerator with the orientation illustrated by mounting means 17 (shown here as arrows and in practice usually comprising suspended spring mountings) .
  • mounting means 17 shown here as arrows and in practice usually comprising suspended spring mountings.
  • the coolant oil for motor 12 is located in the well portion of the housing.
  • Outlets 14, 15 and 16 are provided in the housing for providing connections to the discharge line, return or suction line and a charge line respectively.
  • the refrigerant gases are not physically separated from the field coils of the stator of the drive motor which with the rotor sit in a well of coolant oil in free contact with the refrigerant gases.
  • a compressor assembly 70 is connected to a load 71 by refrigerant supply line 72 and refrigerant return line 73.
  • a compressor unit 74 is driven by an electric motor 75 via drive shaft 76.
  • Motor 75 and compressor 74 are mounted within sealed housing 77 in a known manner (not shown) with motor 75 resting in coolant oil 78.
  • Housing 77 has an inlet 79 for receiving refrigerant for compression and an outlet 80 for returning compressed refrigerant to load 71.
  • Refrigerant gases entering housing 77 through inlet 79 expand within the housing which thus acts as an expansion chamber.
  • the refrigerant gases are collected for compression within the housing at inlet 81 of compressor suction pipe 82.
  • Outlet connector pipe 83 carries compressed refrigerant from compressor 74 to outlet 80 for return to load 71.
  • a compressor assembly 84 is modified from that described above by connecting compressor 74 to inlet 79 by inlet connector pipe 85 and locating an expansion chamber 86 in return line 73.
  • Outlet connector pipe 83 carries compressed refrigerant from compressor 74 to outlet 80 for return to load 71.
  • Housing 77 is thus not utilised as an expansion chamber and inlet connector pipe 85, compressor 74 and outlet connector pipe 83 constitute a sealed unit within housing 77 physically separating the refrigerant from the electric motor, coolants and lubricants.
  • compressor assembly 87 includes a divider wall 88 forming an expansion chamber 89 within housing 77. Refrigerant entering housing 77 through inlet 79 expands within chamber 89 and is collected within chamber 89 at inlet 90 of inlet connector pipe 91 which passes through a sealed aperture in divider wall 88 and connects inlet 90 in chamber 89 to the inlet of compressor 74. Inlet 90 thus constitutes an outlet of expansion chamber 89 and is in sealed fluid communication with compressor 74.
  • Outlet connector pipe 83 carries compressed refrigerant from compressor 74 to outlet 80 for return to load 71.
  • Housing 77 is thus not utilised as an expansion chamber and chamber 89, inlet connector pipe 91, compressor 74 and outlet connector pipe 83 constitute a sealed unit within housing 77 physically separating the refrigerant from the electric motor, coolants and lubricants.
  • the embodiment of the invention described above may of course be utilised in a conventional compressor assembly as illustrated in FIG 2, or as can be seen in FIG 4, can be included in a compressor assembly also including other embodiments of the invention described subsequently with reference to FIGS 5, 9 and 10.
  • FIG 4 shows a divider 93 sealing rotor 94 from stator 95 in motor 75.
  • inlet 90 of inlet connector pipe 91 is preferably located adjacent a wall of chamber 89 such that when compressor assembly 87 is mounted with the motor axis horizontal, inlet 90 is positioned at the lowermost portion of chamber 89 and thus is adapted to collect lubricant for feeding to compressor 74 from the pool of lubricant collecting at the bottom of chamber 89.
  • charge line inlet 92 is respectively located in housing 77 (which constitutes the expansion chamber in known compressor assemblies), or in expansion chambers 86 or 89.
  • the refrigerant may also be physically separated from the electric motor, coolants and lubricants by the arrangement illustrated with reference to FIGS 5 to 11 which illustrate in greater detail a divider for separating the motor rotor and stator equivalent to that illustrated schematically as divider 93 in FIG 4.
  • a compressor assembly 20 having an electric motor including a divider in accordance with the invention consists of a compressor housing 21 and a stator housing 22 connected to the compressor housing by bolts 24.
  • Compressor 26 operates in known manner and is mounted on compressor support frame 23 connected to compressor housing 21 by bolts 25.
  • Compressor 26 is driven by rotor 27 when electric power is supplied to stator coils 28 in known manner.
  • a partition between stator and rotor is provided in the form of a cylindrical divider 29 which is positioned between stator 28 and rotor 27 in abutment with the stator to form an extension thereof.
  • Divider 29 is affixed to the interior of compressor housing 21 by bolts 25 together with compressor support frame 23.
  • Divider 29 encases rotor 27 to effectively seal and so separate rotor 27 from stator 28 whereby refrigerant gases are prevented from coming into contact with stator 28 and escaping from the sealed system.
  • Divider 29 has a central cylindrical body portion 32 open at one end for receiving the rotor therein and closed at the other end by endplate 33.
  • Endplate 33 (as seen in
  • Fig 9 may support bushes and bearings for mounting one end of the rotor.
  • An annular recess 31 is formed around the open end for receiving stator coils therein when stator housing 22 is affixed to the compressor assembly.
  • Divider 29 also has a peripheral flange 30 extending about the outer periphery of recess 31 whereby divider 29 is affixed to housing 21 as described above.
  • a gasket (not shown) can be located in known manner between flange 30 and housing 21. It will be realised that the configuration of the divider can vary depending on the type and configuration of the electric motor.
  • rotor 42 mounted on compressor housing 40 is separated from stator 43 mounted in stator housing 41 by a divider 44 which does not have an annular recesses to accommodate the stator.
  • Divider 44 merely has a peripheral flange at the open end for attachment to housing 40 as described above with reference to FIGS 5 and 6.
  • the divider can be made from a non-ferrous and non- magnetic material so that the effects on the characteristics of the motor are minimised. Brass or a plastics material impervious to coolant oils fluids have been found to be suitable materials.
  • the motor can be extended to provide additional stator coils 45 extending beyond divider
  • auxiliary rotor 46 rotatably mounted to the motor housing by bearing 47.
  • Fan 48 is attached to rotor shaft 49. Upon energisation of the motor, rotation of fan 48 provides air cooling of all stator coils.
  • This embodiment illustrates a bearing 96 located on the inner face of the closed end of the divider cylinder and which provides support for the rotor shaft. A bearing may also be mounted on the outside of the endcap as illustarted at
  • cylinder 51 of divider 50 includes alternating longitudinally extending strip-like portions 53 and 52 of ferro-magnetic material and non-magnetic material respectively.
  • FIG 8 which illustrates cylinder 51 only, the strip-like alternating magnetic and non-magnetic portions extend only along that portion of cylinder 51 corresponding to the longitudinal axial length of the stator poles. This portion may be separately fabricated and housed in a cylinder 60 made from non- magnetic material and which abuts the end windings of the stator when the stator is assembled about the divider.
  • Cylindrical portion 60 terminates in opening 61 through which a rotor enters in cylinder 51.
  • the outer end of the strip-like alternating magnetic and non-magnetic portions of cylinder 51 terminate in end plate 33. End plate 33 and cylindrical portion 60 thus reinforce the strip-like alternating magnetic and non-magnetic cylindrical portion of cylinder 51. .
  • FIG 11 illustrates an end view of a conventional stator 54 having pole pieces 56 and slots 55 for receiving the stator windings (which are not illustrated) through slot openings 57.
  • Stator 54 is modified as seen in FIG 12 by effectively removing the ends of pole pieces 56 by a distance corresponding to the conventional air gap width between stator and rotor.
  • the thickness of the wall of cylinder 51 is equivalent to that of the ends of pole pieces 56, the longitudinally extending strip-like portions of ferro-magnetic material 53 are adapted to juxtapose the pole pieces 58 of the stator when it is positioned about cylinder 51 as seen in FIG 13, and the longitudinally extending strip-like portions of non-magnetic material 52 are adapted to juxtapose slot gaps 59 in the stator.
  • stator 54 may be modified by effectively removing the outer surface thereof by a distance corresponding to the air gap width between stator and rotor.
  • FIG 18 also illustrates a divider cylinder 105 made by inserting pole bits 100 in the gaps formed between non - magnetic fingers 99 of former 104 seen in FIG 16.
  • Pole bits 100 are equivalent to the tips of pole pieces 56 seen in FIG 11 and seen as removed in FIG 12.
  • the pole bits 100 may be retained against radial movement when assembled to form the divider by a suitable adhesive.
  • the edges of the pole bits may be slightly concave and match slightly convex side edges of fingers 99.
  • the longitudinally extending ferro-magnetic strips 101, 102, 103 etc comprise a series of pole bits 100.
  • FIG 18 illustrates a modification of the invention in which keyway 106 is formed in cylinder 105 whereby a spline on the stator assembly (not shown) registers in keyway 106 to provide accurate juxtaposition of the stator assembly relative to the longitudinally extending ferro-magnetic and non-magnetic strips on cylinder 105.
  • FIG 19 illustrates an alternative embodiment of cylinder 108 in which longitudinally extending ribs 109 of non-magnetic material form keyways for closely receiving the poles of a stator assembly.
  • a sealed casing can be located about the stator housing in a manner not shown.
  • a pressure sensitive device is located in the enclosure between the outer sealed casing and divider 29 for detecting the resulting increase in pressure if the divider is breached.
  • the pressure sensitive device can be arranged to activate an alarm to indicate that a leak has occurred.
  • Another advantage of the present invention is that there is no restriction on the orientation of mounting a compressor unit using oil coolant for the motor rather than air cooling, because the oil coolant is physically separated from the refrigerant by the divider.
  • the compressor unit can be bolted horizontally thereby providing greater flexibility in overall refrigerator design.
  • the compressor housing and the divider in accordance with the invention constitute a sealed unit enabling the stator housing to be replaced without breaching the closed system.
  • the invention thus enables motor failures in compressors to be repaired in a relatively cost effective and timely manner.
  • existing systems can be modified when the first repair is carried out to include a divider and consequently the advantages of the invention are not limited to new installations.
  • An appropriate adaptor kit can be provided which is suitable to enable the connection of a divider to individual compressor semi- hermetic units.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Compressor (AREA)

Abstract

Ensemble compresseur de réfrigération (84) comprenant un boîtier (77) possédant un moyen d'entrée (79) servant à recevoir un réfrigérant dans le but de le comprimer et un moyen de sortie (80) servant à renvoyer le réfrigérant comprimé; un moyen de compression (74) monté à l'intérieur du boîtier; un moyen d'accouplement d'entrée servant à accoupler le moyen d'entrée à l'entrée du compresseur et un moyen d'accouplement de sortie (83) servant à accoupler le moyen de sortie à la sortie du compresseur; le moyen de compression, le moyen d'accouplement d'entrée et le moyen d'accouplement de sortie constituent un ensemble réfrigérant scellé à l'intérieur du boîtier.
PCT/AU1993/000460 1993-04-28 1993-09-09 Compresseur de refrigeration WO1994025807A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU49364/93A AU672434B2 (en) 1993-04-28 1993-09-09 Refrigeration compressor
EP93918806A EP0746732A4 (fr) 1993-04-28 1993-09-09 Compresseur de refrigeration

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPL848693 1993-04-28
AUPL8486 1993-04-28
AUPL867593 1993-05-04
AUPL8675 1993-05-04

Publications (1)

Publication Number Publication Date
WO1994025807A1 true WO1994025807A1 (fr) 1994-11-10

Family

ID=25644451

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1993/000460 WO1994025807A1 (fr) 1993-04-28 1993-09-09 Compresseur de refrigeration

Country Status (2)

Country Link
EP (1) EP0746732A4 (fr)
WO (1) WO1994025807A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0710807A2 (fr) * 1994-11-07 1996-05-08 SEP GESELLSCHAFT FÜR TECHNISCHE STUDIEN ENTWICKLUNG PLANUNG mbH Machine frigorifique à compresseur
US5653125A (en) * 1995-01-26 1997-08-05 Boyanich; Joseph E. Compressor with isolated motor windings

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE818954C (de) * 1948-03-12 1951-10-29 Therma Fabrik Fuer Elek Sche H Verfahren zur Herstellung eines Motor-Kompressors
FR1122730A (fr) * 1955-04-15 1956-09-12 Compresseur blindé pour équipements frigorifiques
FR1433156A (fr) * 1965-05-12 1966-03-25 Compresseur frigorifique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR824256A (fr) * 1937-01-08 1938-02-04 Borg Warner Perfectionnements à la construction des moteurs électriques et des systèmes de réfrigération; procédé de construction ou de formation d'une bague de stator pour moteur scellé ou cuirassé
US2282586A (en) * 1939-04-04 1942-05-12 Borg Warner Electric motor unit or the like
GB538358A (en) * 1939-10-27 1941-07-31 Beresford James & Son Ltd Improvements relating to dynamo-electric machines
DE826948C (de) * 1949-09-08 1952-01-07 Bosch Gmbh Robert Verfahren zum Herstellen einer Trennhaube fuer den Motorlaeufer bei gasdicht abgeschlssenen Arbeits-, insbesondere Kaeltemaschinen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE818954C (de) * 1948-03-12 1951-10-29 Therma Fabrik Fuer Elek Sche H Verfahren zur Herstellung eines Motor-Kompressors
FR1122730A (fr) * 1955-04-15 1956-09-12 Compresseur blindé pour équipements frigorifiques
FR1433156A (fr) * 1965-05-12 1966-03-25 Compresseur frigorifique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0746732A4 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0710807A2 (fr) * 1994-11-07 1996-05-08 SEP GESELLSCHAFT FÜR TECHNISCHE STUDIEN ENTWICKLUNG PLANUNG mbH Machine frigorifique à compresseur
US5671607A (en) * 1994-11-07 1997-09-30 Sep Gesellschaft Fur Technische Studien Entwicklung Planung Mbh Compression refrigeration machine
EP0710807A3 (fr) * 1994-11-07 2002-06-19 SEP GESELLSCHAFT FÜR TECHNISCHE STUDIEN ENTWICKLUNG PLANUNG mbH Machine frigorifique à compresseur
US5653125A (en) * 1995-01-26 1997-08-05 Boyanich; Joseph E. Compressor with isolated motor windings

Also Published As

Publication number Publication date
EP0746732A1 (fr) 1996-12-11
EP0746732A4 (fr) 1998-02-11

Similar Documents

Publication Publication Date Title
EP0661793B1 (fr) Assemblage de moteur-pompe
US5083040A (en) Integrated turbine generator
KR0151434B1 (ko) 밀폐형 압축기와 이 압축기를 이용한 냉동장치
US7573165B2 (en) Compressor and driving motor assembly
US5226294A (en) Compressor arrangement suitable for transport refrigeration systems
EP0124973B1 (fr) Machines électriques
EP0184281B1 (fr) Palier principal pour compresseur rotatif
MXPA01001177A (es) Compresor de espiral.
EP3023645B1 (fr) Turbo-compresseur et turbo-réfrigérateur
US4110643A (en) Induction motor
CN113557365A (zh) 箔轴承系统及包括该箔轴承系统的压缩机
US2062045A (en) Motor operated machine unit
EP0771404A1 (fr) Systeme de refrigeration et pompe utilisee dans celui-ci
US5544496A (en) Refrigeration system and pump therefor
CA1246508A (fr) Garniture d'etancheite sur tube d'adduction pour compresseur tournant
CA1189746A (fr) Joint etanche mecanique d'appoint
WO1994025807A1 (fr) Compresseur de refrigeration
KR0151432B1 (ko) 로터리압축기와 이 로터리압축기를 이용한 냉장고 및 냉동장치
AU4936493A (en) Refrigeration compressor
WO2007061385A1 (fr) Piège magnétique pour des contaminants ferreux dans un lubrifiant
KR100325393B1 (ko) 고압돔형압축기
US1867719A (en) Motor operated machine unit
CN111868385B (zh) 密闭型压缩机
RU2175408C1 (ru) Моноблочный центробежный электронасос
Siewert Compressor Tolerance to Liquid Refrigerant

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AT AU BB BG BR BY CA CH CZ DE DK ES FI GB HU JP KP KR KZ LK LU LV MG MN MW NL NO NZ PL PT RO RU SD SE SK UA US VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1993918806

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWP Wipo information: published in national office

Ref document number: 1993918806

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: CA

WWW Wipo information: withdrawn in national office

Ref document number: 1993918806

Country of ref document: EP