US2793506A - Refrigerating apparatus with motor driven centrifugal compressor - Google Patents

Refrigerating apparatus with motor driven centrifugal compressor Download PDF

Info

Publication number
US2793506A
US2793506A US497210A US49721055A US2793506A US 2793506 A US2793506 A US 2793506A US 497210 A US497210 A US 497210A US 49721055 A US49721055 A US 49721055A US 2793506 A US2793506 A US 2793506A
Authority
US
United States
Prior art keywords
motor
refrigerant
compressor
stage
condenser
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US497210A
Inventor
Arthur M G Moody
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.)
Trane Co
Original Assignee
Trane Co
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 Trane Co filed Critical Trane Co
Priority to US497210A priority Critical patent/US2793506A/en
Application granted granted Critical
Publication of US2793506A publication Critical patent/US2793506A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/006—Cooling of compressor or motor
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/23—Separators

Definitions

  • Figure 2 is a cross-sectional view of the motor-compressor assembly taken on an axial plane.
  • an electric motor has at one end a first compressor stage 12 and at the other end a second compressor stage 14.
  • a cross-over pipe 16 conducts gas from the discharge of the first stage to the inlet of the second stage 14.
  • the gas discharged from the second stage 14 flows through a pipe 18 to a condenser 20.
  • the condenser 20 may be of the shell-and-tube type in which cooling water flows through the tubing 22 and the refrigerant is in the shell outside the tubes.
  • Refrigerant liquid condensed in condenser 20 flows by gravity through pipe 23 to a float chamber 24.
  • Float 26 in fioat chamber 24 opens and closes to control the flow of refrigerant liquid to an evaporator 28 which is also of the shell-and-tube type in which the secondary refrigerant liquid such as water or brine flows through the tubing 30 and the refrigerant is in the shell outside the tubing 30.
  • the secondary refrigerant liquid circulates between the evaporator 28 and the cooling load served by the refrigeration apparatus to transfer heat from the load to the evaporator 28.
  • the refrigerant in the evaporator 28 boils forming gas which passes through the liquid eliminator 32 and thence into the suction pipe 34 to the inlet of the first stage compressor 12.
  • the motor 10 has a fiuid tight casing 35 secured in fluid tight relationship to compressor housings 12 and 14.
  • a motor frame 38 is supported in said fluid tight casing 35 by a pair of rings 40 and 41 which divide the annular space between motor frame 38 and said fluid tight casing 35 into a central chamber 42 and end chambers 44 and 46.
  • Motor frame 38 has bearings 48 and 50 which rotatably support a shaft 36.
  • Shaft 36 extends 2,793,506 Patented May 28, 1957 at one end into compressor housing 12 and has impeller 52 secured thereto. The other end of shaft 36 extends into housing 14 and has impeller 54 secured thereto.
  • a stator 56 is secured to the motor frame 36.
  • Stator 56 has the usual windings 58.
  • a plurality of radial passageways 60 extend through the stator 56.
  • a rotor 62 is mounted on shaft 36 to rotate therewith.
  • Rotor 62 rotates within stator 56 and has an outside diameter slightly less than the inside diameter of the stator 56 to provide a gap between the rotor 62 and stator 56.
  • Refrigerant gas flows from the condenser 20 through a pipe 64 into branch pipes and 72 which in turn conduct the gas to the end chambers 44 and 46 respectively.
  • valve 76 may be of the thermostatic type in which a temperature sensing bulb is mounted in the gas stream leaving the motor 10.
  • the gas having entered the motor 10 through pipes 70 and 72, flows to end chambers 44 and 46 from which it is conducted by shrouds 67 and 68 into an annular stream surrounding the shaft 36.
  • shrouds 67 and 68 part of each stream fiows over the winding 58 and into the central chamber 42 and part of each stream flows into the gap between the rotor 62 and stator 56 and then outwardly through the radial passageways 60 in the stator 56 and into the central chamber 42.
  • Central chamber 42 thus collects the gas flowing over the windings 58 and the gas flowing from the radial passageways 60 and conducts the gas to the pipe 74.
  • the gas space above the tubes in the condenser provides a dependable source of gas for motor cooling. Since the condenser is at a pressure substantially equal to the discharge pressure of the second stage 14 and since the pressure in the cross-over pipe 16 is substantially equal to the discharge pressure of the first stage 12, there is sufiicient pressure difference to cause a considerable flow of cooling gas through the motor.
  • the gas entering the cross-over pipe 16 from the motor 10 through pipe 74 is superheated because it has removed heat from the motor. This superheated gas mixe with the gas in the cross-over pipe 16 and minimizes the danger of condensation of liquid in the second stage of the compressor.
  • the additional gas passing through the second stage 14 permits a more efiicient second stage design by reason of the fact that the passageways in the impeller can be made slightly wider.
  • a refrigerating apparatus the combination of an evaporator for vaporizing refrigerant, a condenser for liquefying refrigerant, a two stage compressor for circulating refrigerant through said evaporator and condenser, a cross-over conduit for conducting refrigerant from the first stage of the compressor to the second stage of the compressor, a motor for driving said compressor, a fluid tight casing enclosing said motor, said fluid tight casing being in fluid tight engagement with said compressor, a first conduit connected to said condenser and to said fluid tight casing for conducting refrigerant gas from said condenser to said fluid tight casing, a second conduit, connected to said fluid tight casing and to said cross-over conduit for conducting refrigerant gas from said fluid tight casingto said cross-over conduit whereby refrigerant gas flows through said fluid tightcasing to remove heat from the motor.
  • an evaporator for vaporizing refrigerant a condenser for liquefying refrigerant
  • a pipe for conducting refrigerant from said condenser to said evaporator a Centrifugal compressor having a first compressor stage and a second compressor stage, said first compressor stage being connected to receive refrigerant from said evaporator, 'a crossover conduit for conducting refrigerant from .said first compressor stage to the inlet of said second compressor stage, a pipe for conducting refrigerantfrom said second compressor stage to said condenser, a motor casing in fluid tight engagement with said centrifugal compressor, a motor frame in said motor casing, annular rings between said motorframe-and said motor casing to support said motor frame in said motor casing, said annular rings being arranged to divide the annular space between said motor frameand said motor easing into a central chamber and two end chambers, a stator mounted in said motor frame opposite said central portion, said stator having
  • an evaporator for vaporizing refrigerant a condenser for liquefying refrigerant, a pipefor conducting refrigerant from said condenser to said evaporator, a first compressor stage, a second compressor stage, said first compressor stage being connected to receive refrig rant from said evaporator, a cross-over conduit, for conducting refrigerant from said first compressor stage to the inlet of said second compressor stage, a discharge pipe'for conducting refrigerant from said second compressor stage to said condenser, a motor casing in fluid sealing relationship with said compressor stages, a motor frame in said motor casing, hearings in each end of the motor'frame, a shaft and rotor assembly rotatably mounted in said bearings, said shaft and rotor assembly extending into said com pressor stages, an impeller in each of said compressor stages, said impellers being secured to said shaft and rotor assembly, a first conduit connected to said condenser and to said.

Description

May 28, 1957 MOODY 2,793,506
A. M. G. REFRIGERATING APPARATUS WITH MOTOR DRIVEN CENTRIF'UGAL COMPRESSOR Filed March 28, 1955 IN VEN TOR. ARTHUR M. G. MOODY MMTW ATTORNEYS United States Patent REFRIGERATING APPARATUS WITH MOTOR DRIVEN CENTRIFUGAL COMPRESSOR Arthur M. G. Moody, La Crosse, Wis., assignor to The Trane Company, La Crosse, Wis., a corporation of Wisconsin This invention relates to refrigerating apparatus of the type including a motor-compressor assembly, and particularly to apparatus in which a motor and a multi-stage compressor are housed in a sealed unit.
It is an object of this invention to provide means for cooling the motor using the refrigerant of the apparatus as a heat exchange medium.
It is another Object of the invention to provide circulation of refrigerant gas from the condenser to the motor casing, thence over the rotor and stator of the motor, and thence to the cross-over pipe between the first and second stage of the compressor.
It is another object of the invention to provide passageways in the motor casing to conduct refrigerant gas in two streams to the ends of the motor to flow first over the bearings and with each stream then separating into two streams one of which flows over the stator winding and the other of which flows through the gap and outwardly through passageways in the stator.
Other objects and advantages of the invention will appear as the specification proceeds to describe the invention with reference to the accompanying drawings; in which- Figure 1 is a partly diagrammatic view of the refrigeration apparatus of my invention.
Figure 2 is a cross-sectional view of the motor-compressor assembly taken on an axial plane.
Referring now to Figure 1, an electric motor has at one end a first compressor stage 12 and at the other end a second compressor stage 14. A cross-over pipe 16 conducts gas from the discharge of the first stage to the inlet of the second stage 14. The gas discharged from the second stage 14 flows through a pipe 18 to a condenser 20. The condenser 20 may be of the shell-and-tube type in which cooling water flows through the tubing 22 and the refrigerant is in the shell outside the tubes. Refrigerant liquid condensed in condenser 20 flows by gravity through pipe 23 to a float chamber 24. Float 26 in fioat chamber 24 opens and closes to control the flow of refrigerant liquid to an evaporator 28 which is also of the shell-and-tube type in which the secondary refrigerant liquid such as water or brine flows through the tubing 30 and the refrigerant is in the shell outside the tubing 30. The secondary refrigerant liquid circulates between the evaporator 28 and the cooling load served by the refrigeration apparatus to transfer heat from the load to the evaporator 28. In removing heat from the secondary refrigerant, the refrigerant in the evaporator 28 boils forming gas which passes through the liquid eliminator 32 and thence into the suction pipe 34 to the inlet of the first stage compressor 12.
The motor 10 has a fiuid tight casing 35 secured in fluid tight relationship to compressor housings 12 and 14. A motor frame 38 is supported in said fluid tight casing 35 by a pair of rings 40 and 41 which divide the annular space between motor frame 38 and said fluid tight casing 35 into a central chamber 42 and end chambers 44 and 46. Motor frame 38 has bearings 48 and 50 which rotatably support a shaft 36. Shaft 36 extends 2,793,506 Patented May 28, 1957 at one end into compressor housing 12 and has impeller 52 secured thereto. The other end of shaft 36 extends into housing 14 and has impeller 54 secured thereto. A stator 56 is secured to the motor frame 36. Stator 56 has the usual windings 58. A plurality of radial passageways 60 extend through the stator 56. A rotor 62 is mounted on shaft 36 to rotate therewith. Rotor 62 rotates within stator 56 and has an outside diameter slightly less than the inside diameter of the stator 56 to provide a gap between the rotor 62 and stator 56. Refrigerant gas flows from the condenser 20 through a pipe 64 into branch pipes and 72 which in turn conduct the gas to the end chambers 44 and 46 respectively.
After the gas has traversed its path through the motor 10, as will be described in detail below, it flows from the motor 10 through pipe 74 which conducts the gas to the cross-over pipe 16. After entering the pipe 16, this gas flows with the gas discharged from the first stage 12 and enters the second stage 14.
The fiow of gas through pipe 64 may be manually controlled by valve 76. If desired valve 76 may be of the thermostatic type in which a temperature sensing bulb is mounted in the gas stream leaving the motor 10.
The gas, having entered the motor 10 through pipes 70 and 72, flows to end chambers 44 and 46 from which it is conducted by shrouds 67 and 68 into an annular stream surrounding the shaft 36. On leaving the shrouds 67 and 68 part of each stream fiows over the winding 58 and into the central chamber 42 and part of each stream flows into the gap between the rotor 62 and stator 56 and then outwardly through the radial passageways 60 in the stator 56 and into the central chamber 42. Central chamber 42 thus collects the gas flowing over the windings 58 and the gas flowing from the radial passageways 60 and conducts the gas to the pipe 74.
It is thus seen that the gas space above the tubes in the condenser provides a dependable source of gas for motor cooling. Since the condenser is at a pressure substantially equal to the discharge pressure of the second stage 14 and since the pressure in the cross-over pipe 16 is substantially equal to the discharge pressure of the first stage 12, there is sufiicient pressure difference to cause a considerable flow of cooling gas through the motor.
The gas entering the cross-over pipe 16 from the motor 10 through pipe 74 is superheated because it has removed heat from the motor. This superheated gas mixe with the gas in the cross-over pipe 16 and minimizes the danger of condensation of liquid in the second stage of the compressor.
The additional gas passing through the second stage 14 permits a more efiicient second stage design by reason of the fact that the passageways in the impeller can be made slightly wider.
While the apparatus disclosed and described herein constitutes a preferred form of the invention, yet it will be understood that the apparatus is capable of alteration without departing from the scope or spirit of the invention, and that all modifications that fall within the scope of the appended claims are intended to be included herein.
Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:
1. In a refrigerating apparatus, the combination of an evaporator for vaporizing refrigerant, a condenser for liquefying refrigerant, a two stage compressor for circulating refrigerant through said evaporator and condenser, a cross-over conduit for conducting refrigerant from the first stage of the compressor to the second stage of the compressor, a motor for driving said compressor, a fluid tight casing enclosing said motor, said fluid tight casing being in fluid tight engagement with said compressor, a first conduit connected to said condenser and to said fluid tight casing for conducting refrigerant gas from said condenser to said fluid tight casing, a second conduit, connected to said fluid tight casing and to said cross-over conduit for conducting refrigerant gas from said fluid tight casingto said cross-over conduit whereby refrigerant gas flows through said fluid tightcasing to remove heat from the motor.
2. In refrigerating apparatus, the combination of an evaporator for vaporizing refrigerant, a condenser for liquefying refrigerant, a pipe for conducting refrigerant from said condenser to said evaporator, a Centrifugal compressor having a first compressor stage and a second compressor stage, said first compressor stage being connected to receive refrigerant from said evaporator, 'a crossover conduit for conducting refrigerant from .said first compressor stage to the inlet of said second compressor stage, a pipe for conducting refrigerantfrom said second compressor stage to said condenser, a motor casing in fluid tight engagement with said centrifugal compressor, a motor frame in said motor casing, annular rings between said motorframe-and said motor casing to support said motor frame in said motor casing, said annular rings being arranged to divide the annular space between said motor frameand said motor easing into a central chamber and two end chambers, a stator mounted in said motor frame opposite said central portion, said stator having radial passageways extending therethrough,passageways in said motor frame from said end chambers to the inner ends of said radial passageways, bearings in each end of the motor frame, a shaft and rotor assembly rotatably mounted in said bearings, said shaft and rotor assembly extending into said centrifugal compressor, an impeller in each compressor stage, said impellers being secured to said shaft and rotor assembly, conduit means connected to said condenser and said end chambers for conducting refrigerant from said condenser to said end .chambers, conduit means connected to said central chamberand said cross-over conduit for conducting refrigerant from said central chamber to said cross-over conduit whereby refrigerant is caused to flow from said end chambers through the passageways in said motor frame and then through the radial passageways in the stator to remove heat from the motor.
3. In refrigerating apparatus, the combination of an evaporator for vaporizing refrigerant, a condenser for liquefying refrigerant, a pipe for conducting refrigerant from said condenser to said evaporator, a first stage centrifugal compressorhaving ,an inlet connected to receive refrigerant from said evaporator, a second stage centrifugal compressor, a cross-over conduit for conducting refrigerant from said first stage centrifugal compressor to the inlet or said second stage centrifugal compressor, a pipe for conducting refrigerant from said second stage centrifugal compressor to said condenser, a motor casing in fluid tight engagement at one end with said first stage centrifugal compressor and at its other end with said second stage centrifugal compressor, a motor frame in said annular motor casing, annular rings between said motor frame and said motor casing to support said motor frame in said motor casing, said annular rings being arranged to divide the annular space between said motor frame and said motor easing into a central chamber and two end chambers, a stator mounted in said motor frame opposite said central portion, said stator having radial passageways extending therethrough, passageways in said motor frame from said endchambers to the inner ends of said radial passageways, bearings in each end of the motor frame, a shaft and rotor assembly rotatably mounted in said bearings, said shaft and rotor assembly having one end extending into said-first stage centrifugal compressor, an impeller secured to said one end of said shaft and rotor assembly, said'shaft and rotor assembly having its'other end extending-into said second stage centrifugal compressor, an impeller secured to said other end of said shaft and rotor assembly, conduit means connected to saidcondenser and said end chambers for conducting refrigerant from,,said condenser to said end chambers, conduit means connected tosaid central chamber and said cross-over conduit for conducting refrigerant from said central chamber to said cross-over conduit whereby refrigerant ,is caused to .flow from said end chambers through the passageways in saidimotor frame and then through the radial passageways in the stator toremove heat from the motor.
4. In refrigerating apparatus, the combination of an evaporator for vaporizing refrigerant, a condenser for liquefying refrigerant, a pipefor conducting refrigerant from said condenser to said evaporator, a first compressor stage, a second compressor stage, said first compressor stage being connected to receive refrig rant from said evaporator, a cross-over conduit, for conducting refrigerant from said first compressor stage to the inlet of said second compressor stage, a discharge pipe'for conducting refrigerant from said second compressor stage to said condenser, a motor casing in fluid sealing relationship with said compressor stages, a motor frame in said motor casing, hearings in each end of the motor'frame, a shaft and rotor assembly rotatably mounted in said bearings, said shaft and rotor assembly extending into said com pressor stages, an impeller in each of said compressor stages, said impellers being secured to said shaft and rotor assembly, a first conduit connected to said condenser and to said. motor casing for conducting refrigerant from said condenser to said motor casing, a second conduit connected to said motor casing and to said cross-over conduit for conducting refrigerant from said motor casing to said cross-over conduit whereby refrigerant is caused to flowfrom .said condenser to said motor casing and thence to said cross-over conduit to remove heat from the motor casing.
A-ndresen Dec. 6, 1932 Jones Mar. '24, 1942
US497210A 1955-03-28 1955-03-28 Refrigerating apparatus with motor driven centrifugal compressor Expired - Lifetime US2793506A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US497210A US2793506A (en) 1955-03-28 1955-03-28 Refrigerating apparatus with motor driven centrifugal compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US497210A US2793506A (en) 1955-03-28 1955-03-28 Refrigerating apparatus with motor driven centrifugal compressor

Publications (1)

Publication Number Publication Date
US2793506A true US2793506A (en) 1957-05-28

Family

ID=23975908

Family Applications (1)

Application Number Title Priority Date Filing Date
US497210A Expired - Lifetime US2793506A (en) 1955-03-28 1955-03-28 Refrigerating apparatus with motor driven centrifugal compressor

Country Status (1)

Country Link
US (1) US2793506A (en)

Cited By (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891391A (en) * 1957-08-26 1959-06-23 Vilter Mfg Co Refrigerated hermetically sealed motors
US2918209A (en) * 1957-05-14 1959-12-22 Schueller Otto Motor-compressor unit
US2961847A (en) * 1957-05-07 1960-11-29 Fairchild Engine & Airplane High altitude cooling system
US3057172A (en) * 1961-04-03 1962-10-09 Westinghouse Electric Corp Systems for cooling motors of refrigerant compressors
US3094272A (en) * 1960-12-09 1963-06-18 Trane Co Motor-compressor apparatus
US3112618A (en) * 1960-06-15 1963-12-03 American Radiator & Standard Cooling means for refrigerant compressor motors
US3122894A (en) * 1962-07-05 1964-03-03 American Radiator & Standard Hermetic motor cooling by direct expansion of system refrigerant into motor
US3146605A (en) * 1961-06-02 1964-09-01 Carrier Corp Apparatus for cooling a refrigeration system motor
US3150277A (en) * 1962-03-14 1964-09-22 Worthington Corp Hermetic motor cooling by liquid refrigerant
US3158009A (en) * 1963-01-23 1964-11-24 Worthington Corp Refrigeration apparatus including compressor motor cooling means
US3165905A (en) * 1962-08-15 1965-01-19 Trane Co Refrigerating machine including an economizer
US3229896A (en) * 1963-11-05 1966-01-18 American Agile Co Vaneaxial fan
US3261172A (en) * 1963-11-12 1966-07-19 Vilter Manufacturing Corp Coolant system for hermetically sealed motor
DE1258879B (en) * 1958-08-18 1968-01-18 American Radiator & Standard Cooling device for closed electric motors
US3879180A (en) * 1971-12-18 1975-04-22 Gutehoffnungshuette Sterkrade Method for treating a gas current which is obtained by coal gasification
US3913346A (en) * 1974-05-30 1975-10-21 Dunham Bush Inc Liquid refrigerant injection system for hermetic electric motor driven helical screw compressor
FR2578313A1 (en) * 1985-03-04 1986-09-05 American Standard Inc SCREW COMPRESSOR ASSEMBLY, ECONOMIZER COUPLING REFRIGERATION SYSTEM, AND METHOD FOR ESTABLISHING SUCH COUPLING.
US4889475A (en) * 1987-12-24 1989-12-26 Tecumseh Products Company Twin rotary compressor with suction accumulator
US5363674A (en) * 1993-05-04 1994-11-15 Ecoair Corp. Zero superheat refrigeration compression system
US5431547A (en) * 1993-10-05 1995-07-11 Phoenix Refrigeration Systems, Inc. Liquid refrigerant pump
US5540061A (en) * 1992-01-09 1996-07-30 Hitachi, Ltd. Refrigerator
US5555956A (en) * 1993-02-25 1996-09-17 Nartron Corporation Low capacity centrifugal refrigeration compressor
WO1997039292A1 (en) * 1996-04-18 1997-10-23 Zakrytoe Aktsionernoe Obschestvo Nauchno-Proizvodstvennoe Obiedinenie 'vik' 5 OR 8 kW REFRIGERATING SYSTEM AND CENTRIFUGAL COMPRESSOR ASSEMBLY FOR SAID SYSTEM
WO1997039291A1 (en) * 1996-04-17 1997-10-23 Vic Dynamic Projects Limited Refrigerating system and centrifugal compressor assembly for said system
US6009722A (en) * 1997-12-26 2000-01-04 Lg Electronics Inc. Motor cooling structure for turbo
US6450781B1 (en) 1996-04-26 2002-09-17 Samjin Co., Ltd. Centrifugal compressor assembly for a refrigerating system
US6471493B2 (en) * 2000-09-27 2002-10-29 Lg Electronics Inc. Assembly structure for a turbo compressor
US20030059315A1 (en) * 2001-09-25 2003-03-27 Moon-Chang Choi Turbo compressor
US20040050090A1 (en) * 2000-06-22 2004-03-18 Avraham Ophir Arrangement for multi-stage heat pump assembly
US20050082941A1 (en) * 2003-10-17 2005-04-21 Toyota Jidosha Kabushiki Kaisha Turbocharger with rotating electric machine
EP1526282A1 (en) * 2003-10-24 2005-04-27 Voith Turbo GmbH & Co. KG Motor-pump unit
US20060059941A1 (en) * 2004-09-22 2006-03-23 Hamilton Sundstrand RAM fan system for an aircraft environmental control system
US20060061221A1 (en) * 2004-09-22 2006-03-23 Mcauliffe Christopher Integral motor and air bearing cooling path
US20060061222A1 (en) * 2004-09-22 2006-03-23 Hamilton Sundstrand Air bearing and motor cooling
US20080253907A1 (en) * 2005-09-15 2008-10-16 Lind Finance & Development Ab Cooling of Stator for Compressor
US20090195092A1 (en) * 2008-01-31 2009-08-06 Gagnon Gilles D Winding end turn cooling in an electric machine
US20090205362A1 (en) * 2008-02-20 2009-08-20 Haley Paul F Centrifugal compressor assembly and method
US20090208331A1 (en) * 2008-02-20 2009-08-20 Haley Paul F Centrifugal compressor assembly and method
US20090205360A1 (en) * 2008-02-20 2009-08-20 Haley Paul H Centrifugal compressor assembly and method
US7975506B2 (en) 2008-02-20 2011-07-12 Trane International, Inc. Coaxial economizer assembly and method
US20110229351A1 (en) * 2010-03-22 2011-09-22 Beers Craig M Journal bearing with dual pass cooling for air machine
JP2012020728A (en) * 2010-07-16 2012-02-02 Hamilton Sundstrand Corp Cabin air compressor apparatus and method for cooling the same
US20120266887A1 (en) * 2001-12-10 2012-10-25 Resmed Limited Double-ended blower and volutes therefor
US20140127050A1 (en) * 2011-07-21 2014-05-08 Ihi Corporation Electrical motor and turbo compressor
US20150276282A1 (en) * 2012-12-07 2015-10-01 Trane International Inc. Motor cooling system for chillers
CN105865065A (en) * 2016-06-08 2016-08-17 南通四方冷链装备股份有限公司 Refrigeration system
US9427538B2 (en) 2001-12-10 2016-08-30 Resmed Limited Multiple stage blowers and volutes therefor
EP2951440A4 (en) * 2013-01-31 2017-01-11 Danfoss A/S Centrifugal compressor with extended operating range
US9610416B2 (en) 2009-06-04 2017-04-04 Resmed Limited Flow generator chassis assembly with suspension seal
US9862493B2 (en) 2013-05-28 2018-01-09 Hamilton Sundstrand Corporation Motor cooling blower and containment structure
EP3377829A4 (en) * 2015-11-16 2019-09-25 Emerson Climate Technologies, Inc. Compressor with cooling system
US10598395B2 (en) 2018-05-15 2020-03-24 Emerson Climate Technologies, Inc. Climate-control system with ground loop
US11149971B2 (en) 2018-02-23 2021-10-19 Emerson Climate Technologies, Inc. Climate-control system with thermal storage device
US11156231B2 (en) 2018-03-23 2021-10-26 Honeywell International Inc. Multistage compressor having interstage refrigerant path split between first portion flowing to end of shaft and second portion following around thrust bearing disc
US11346583B2 (en) 2018-06-27 2022-05-31 Emerson Climate Technologies, Inc. Climate-control system having vapor-injection compressors
US20220194597A1 (en) * 2020-12-22 2022-06-23 Hamilton Sundstrand Corporation Cabin air compressor with liquid cooled passage formed in the case
US11448237B2 (en) * 2019-02-25 2022-09-20 Mitsubishi Heavy Industries Compressor Corporation Compressor
US11585608B2 (en) 2018-02-05 2023-02-21 Emerson Climate Technologies, Inc. Climate-control system having thermal storage tank

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1890205A (en) * 1931-01-31 1932-12-06 W B Parkyn Refrigerating apparatus
US2277647A (en) * 1940-08-01 1942-03-24 Carrier Corp Refrigeration

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1890205A (en) * 1931-01-31 1932-12-06 W B Parkyn Refrigerating apparatus
US2277647A (en) * 1940-08-01 1942-03-24 Carrier Corp Refrigeration

Cited By (84)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961847A (en) * 1957-05-07 1960-11-29 Fairchild Engine & Airplane High altitude cooling system
US2918209A (en) * 1957-05-14 1959-12-22 Schueller Otto Motor-compressor unit
US2891391A (en) * 1957-08-26 1959-06-23 Vilter Mfg Co Refrigerated hermetically sealed motors
DE1258879B (en) * 1958-08-18 1968-01-18 American Radiator & Standard Cooling device for closed electric motors
US3112618A (en) * 1960-06-15 1963-12-03 American Radiator & Standard Cooling means for refrigerant compressor motors
US3094272A (en) * 1960-12-09 1963-06-18 Trane Co Motor-compressor apparatus
US3057172A (en) * 1961-04-03 1962-10-09 Westinghouse Electric Corp Systems for cooling motors of refrigerant compressors
US3146605A (en) * 1961-06-02 1964-09-01 Carrier Corp Apparatus for cooling a refrigeration system motor
US3150277A (en) * 1962-03-14 1964-09-22 Worthington Corp Hermetic motor cooling by liquid refrigerant
US3122894A (en) * 1962-07-05 1964-03-03 American Radiator & Standard Hermetic motor cooling by direct expansion of system refrigerant into motor
US3165905A (en) * 1962-08-15 1965-01-19 Trane Co Refrigerating machine including an economizer
US3158009A (en) * 1963-01-23 1964-11-24 Worthington Corp Refrigeration apparatus including compressor motor cooling means
US3229896A (en) * 1963-11-05 1966-01-18 American Agile Co Vaneaxial fan
US3261172A (en) * 1963-11-12 1966-07-19 Vilter Manufacturing Corp Coolant system for hermetically sealed motor
US3879180A (en) * 1971-12-18 1975-04-22 Gutehoffnungshuette Sterkrade Method for treating a gas current which is obtained by coal gasification
US3913346A (en) * 1974-05-30 1975-10-21 Dunham Bush Inc Liquid refrigerant injection system for hermetic electric motor driven helical screw compressor
FR2578313A1 (en) * 1985-03-04 1986-09-05 American Standard Inc SCREW COMPRESSOR ASSEMBLY, ECONOMIZER COUPLING REFRIGERATION SYSTEM, AND METHOD FOR ESTABLISHING SUCH COUPLING.
US4889475A (en) * 1987-12-24 1989-12-26 Tecumseh Products Company Twin rotary compressor with suction accumulator
US5540061A (en) * 1992-01-09 1996-07-30 Hitachi, Ltd. Refrigerator
US5555956A (en) * 1993-02-25 1996-09-17 Nartron Corporation Low capacity centrifugal refrigeration compressor
US5363674A (en) * 1993-05-04 1994-11-15 Ecoair Corp. Zero superheat refrigeration compression system
US5431547A (en) * 1993-10-05 1995-07-11 Phoenix Refrigeration Systems, Inc. Liquid refrigerant pump
WO1997039291A1 (en) * 1996-04-17 1997-10-23 Vic Dynamic Projects Limited Refrigerating system and centrifugal compressor assembly for said system
WO1997039292A1 (en) * 1996-04-18 1997-10-23 Zakrytoe Aktsionernoe Obschestvo Nauchno-Proizvodstvennoe Obiedinenie 'vik' 5 OR 8 kW REFRIGERATING SYSTEM AND CENTRIFUGAL COMPRESSOR ASSEMBLY FOR SAID SYSTEM
US6450781B1 (en) 1996-04-26 2002-09-17 Samjin Co., Ltd. Centrifugal compressor assembly for a refrigerating system
US6009722A (en) * 1997-12-26 2000-01-04 Lg Electronics Inc. Motor cooling structure for turbo
US20040050090A1 (en) * 2000-06-22 2004-03-18 Avraham Ophir Arrangement for multi-stage heat pump assembly
US7013669B2 (en) * 2000-06-22 2006-03-21 I.D.E. Technologies, Ltd. Arrangement for multi-stage heat pump assembly
US6471493B2 (en) * 2000-09-27 2002-10-29 Lg Electronics Inc. Assembly structure for a turbo compressor
US20030059315A1 (en) * 2001-09-25 2003-03-27 Moon-Chang Choi Turbo compressor
US6729858B2 (en) * 2001-09-25 2004-05-04 Lg Electronics Inc. Thrust bearing cooling unit for a turbo compressor
US9427538B2 (en) 2001-12-10 2016-08-30 Resmed Limited Multiple stage blowers and volutes therefor
US20120266887A1 (en) * 2001-12-10 2012-10-25 Resmed Limited Double-ended blower and volutes therefor
US10434271B2 (en) 2001-12-10 2019-10-08 ResMed Pty Ltd Multiple stage blowers and volutes therefor
US10400773B2 (en) 2001-12-10 2019-09-03 ResMed Pty Ltd Double-ended blower and volutes therefor
US10300231B2 (en) 2001-12-10 2019-05-28 Resmed Limited Multiple stage blowers and volutes therefor
US8499760B2 (en) * 2001-12-10 2013-08-06 Resmed Limited Double-ended blower and volutes therefor
US20050082941A1 (en) * 2003-10-17 2005-04-21 Toyota Jidosha Kabushiki Kaisha Turbocharger with rotating electric machine
US7071585B2 (en) 2003-10-17 2006-07-04 Toyota Jidosha Kabushiki Kaisha Turbocharger with rotating electric machine
US20050280325A1 (en) * 2003-10-17 2005-12-22 Toyota Jidosha Kabushiki Kaisha Turbocharger with rotating electric machine
US6943468B2 (en) * 2003-10-17 2005-09-13 Toyota Jidosha Kabushiki Kaisha Turbocharger with rotating electric machine
EP1526282A1 (en) * 2003-10-24 2005-04-27 Voith Turbo GmbH & Co. KG Motor-pump unit
US20060061221A1 (en) * 2004-09-22 2006-03-23 Mcauliffe Christopher Integral motor and air bearing cooling path
US7394175B2 (en) * 2004-09-22 2008-07-01 Hamilton Sundstrand Corporation Integral motor and air bearing cooling path
US7342332B2 (en) * 2004-09-22 2008-03-11 Hamilton Sundstrand Corporation Air bearing and motor cooling
US7757502B2 (en) * 2004-09-22 2010-07-20 Hamilton Sundstrand Corporation RAM fan system for an aircraft environmental control system
US20060061222A1 (en) * 2004-09-22 2006-03-23 Hamilton Sundstrand Air bearing and motor cooling
US20060059941A1 (en) * 2004-09-22 2006-03-23 Hamilton Sundstrand RAM fan system for an aircraft environmental control system
US20080253907A1 (en) * 2005-09-15 2008-10-16 Lind Finance & Development Ab Cooling of Stator for Compressor
US20090195092A1 (en) * 2008-01-31 2009-08-06 Gagnon Gilles D Winding end turn cooling in an electric machine
US8198762B2 (en) * 2008-01-31 2012-06-12 Pratt & Whitney Canada Corp. Winding end turn cooling in an electric machine
US9683758B2 (en) 2008-02-20 2017-06-20 Trane International Inc. Coaxial economizer assembly and method
US20090205360A1 (en) * 2008-02-20 2009-08-20 Haley Paul H Centrifugal compressor assembly and method
US7856834B2 (en) 2008-02-20 2010-12-28 Trane International Inc. Centrifugal compressor assembly and method
US9556875B2 (en) 2008-02-20 2017-01-31 Trane International Inc. Centrifugal compressor assembly and method
US20090208331A1 (en) * 2008-02-20 2009-08-20 Haley Paul F Centrifugal compressor assembly and method
US8627680B2 (en) 2008-02-20 2014-01-14 Trane International, Inc. Centrifugal compressor assembly and method
US20090205362A1 (en) * 2008-02-20 2009-08-20 Haley Paul F Centrifugal compressor assembly and method
US8037713B2 (en) 2008-02-20 2011-10-18 Trane International, Inc. Centrifugal compressor assembly and method
US9353765B2 (en) 2008-02-20 2016-05-31 Trane International Inc. Centrifugal compressor assembly and method
US7975506B2 (en) 2008-02-20 2011-07-12 Trane International, Inc. Coaxial economizer assembly and method
US11129948B2 (en) 2009-06-04 2021-09-28 ResMed Pty Ltd Flow generator chassis assembly with suspension seal
US9610416B2 (en) 2009-06-04 2017-04-04 Resmed Limited Flow generator chassis assembly with suspension seal
US20110229351A1 (en) * 2010-03-22 2011-09-22 Beers Craig M Journal bearing with dual pass cooling for air machine
US8496533B2 (en) 2010-03-22 2013-07-30 Hamilton Sundstrand Corporation Journal bearing with dual pass cooling for air machine
JP2012020728A (en) * 2010-07-16 2012-02-02 Hamilton Sundstrand Corp Cabin air compressor apparatus and method for cooling the same
US20140127050A1 (en) * 2011-07-21 2014-05-08 Ihi Corporation Electrical motor and turbo compressor
US10072468B2 (en) * 2012-12-07 2018-09-11 Trane International Inc. Motor cooling system for chillers
US20150276282A1 (en) * 2012-12-07 2015-10-01 Trane International Inc. Motor cooling system for chillers
US10184481B2 (en) 2013-01-31 2019-01-22 Danfoss A/S Centrifugal compressor with extended operating range
EP2951440A4 (en) * 2013-01-31 2017-01-11 Danfoss A/S Centrifugal compressor with extended operating range
US9862493B2 (en) 2013-05-28 2018-01-09 Hamilton Sundstrand Corporation Motor cooling blower and containment structure
US10465962B2 (en) 2015-11-16 2019-11-05 Emerson Climate Technologies, Inc. Compressor with cooling system
EP3377829A4 (en) * 2015-11-16 2019-09-25 Emerson Climate Technologies, Inc. Compressor with cooling system
WO2017211033A1 (en) * 2016-06-08 2017-12-14 南通四方冷链装备股份有限公司 Refrigeration system
CN105865065A (en) * 2016-06-08 2016-08-17 南通四方冷链装备股份有限公司 Refrigeration system
US11585608B2 (en) 2018-02-05 2023-02-21 Emerson Climate Technologies, Inc. Climate-control system having thermal storage tank
US11149971B2 (en) 2018-02-23 2021-10-19 Emerson Climate Technologies, Inc. Climate-control system with thermal storage device
US11156231B2 (en) 2018-03-23 2021-10-26 Honeywell International Inc. Multistage compressor having interstage refrigerant path split between first portion flowing to end of shaft and second portion following around thrust bearing disc
US10598395B2 (en) 2018-05-15 2020-03-24 Emerson Climate Technologies, Inc. Climate-control system with ground loop
US11346583B2 (en) 2018-06-27 2022-05-31 Emerson Climate Technologies, Inc. Climate-control system having vapor-injection compressors
US11448237B2 (en) * 2019-02-25 2022-09-20 Mitsubishi Heavy Industries Compressor Corporation Compressor
US20220194597A1 (en) * 2020-12-22 2022-06-23 Hamilton Sundstrand Corporation Cabin air compressor with liquid cooled passage formed in the case
US11897618B2 (en) * 2020-12-22 2024-02-13 Hamilton Sundstrand Corporation Cabin air compressor with liquid cooled passage formed in the case

Similar Documents

Publication Publication Date Title
US2793506A (en) Refrigerating apparatus with motor driven centrifugal compressor
US2746269A (en) Plural stage refrigerating apparatus
US2770106A (en) Cooling motor compressor unit of refrigerating apparatus
US2768511A (en) Motor compressor cooling in refrigerating apparatus
US3241331A (en) Apparatus for and method of motor cooling
US3388559A (en) Electric motors cooled with refrigerants
US3188833A (en) Electric motor with improved cooling means
US3165905A (en) Refrigerating machine including an economizer
US3218825A (en) Refrigerating apparatus including means for cooling compressor motor
US3025684A (en) Refrigerating machine
CN104823360B (en) motor rotor and air gap cooling
CN107923663B (en) Low capacity, low GWP HVAC systems
US2243466A (en) Refrigerating apparatus
JP5326900B2 (en) Turbo compressor and refrigerator
US3296824A (en) Multiple pump system for absorption apparatus
US1575818A (en) Refrigerating system and method of refrigeration
JP2005312272A (en) Turbo refrigerator and motor for the turbo refrigerator
US2283024A (en) Air conditioning apparatus
JP2015194300A (en) turbo refrigerator
JP2015190733A (en) Evaporator of turbo refrigerator, and turbo refrigerator including evaporator
US2201099A (en) Refrigeration
US1436444A (en) Refrigerating apparatus
US2924081A (en) Rotating air conditioner
US3559419A (en) Centrifugal absorbtive thermodynamic apparatus and method
US2649698A (en) Special valve arrangement on centrifugal condensers and coolers