US3838581A - Refrigerator apparatus including motor cooling means - Google Patents

Refrigerator apparatus including motor cooling means Download PDF

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Publication number
US3838581A
US3838581A US00410665A US41066573A US3838581A US 3838581 A US3838581 A US 3838581A US 00410665 A US00410665 A US 00410665A US 41066573 A US41066573 A US 41066573A US 3838581 A US3838581 A US 3838581A
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Prior art keywords
motor
refrigerant
condenser
casing
mixture
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Expired - Lifetime
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US00410665A
Inventor
J Endress
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Carrier Corp
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Carrier Corp
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Filing date
Publication date
Priority to US00410665A priority Critical patent/US3838581A/en
Application filed by Carrier Corp filed Critical Carrier Corp
Publication of US3838581A publication Critical patent/US3838581A/en
Application granted granted Critical
Priority to ZA00746414A priority patent/ZA746414B/en
Priority to GB43791/74A priority patent/GB1487071A/en
Priority to AU74243/74A priority patent/AU487837B2/en
Priority to IT28440/74A priority patent/IT1022886B/en
Priority to DE19742450169 priority patent/DE2450169A1/en
Priority to BR8827/74A priority patent/BR7408827D0/en
Priority to NL7413982A priority patent/NL7413982A/en
Priority to FR7435852A priority patent/FR2249473B1/fr
Priority to BE149910A priority patent/BE821513A/en
Priority to JP49123274A priority patent/JPS5074241A/ja
Priority to ES431405A priority patent/ES431405A1/en
Priority to SE7413528A priority patent/SE409618B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F25B1/053—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of turbine type
    • 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
    • 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

Definitions

  • the compressor is operated by an open drive motor.
  • the open drive motor is mounted externally of, and separate from, the compressor, as distinguished from an enclosed drive wherein the motor is mounted in the compressor housing.
  • the advantages of an open drive motor are well known, especially in that the motor can be quickly and conveniently serviced and replaced if necessary. Also, if desired, the motor can be replaced by a turbine or other primer mover.
  • the advantage of a refrigerant cooled motor is also well known. The main advantage being in that the rating of the motor may be reduced 25 percent or more. This effects a saving of several thousand dollars in motor costs for a motor drive on large tonnage refrigeration apparatus.
  • auxiliary compressor and condenser there is provided an auxiliary compressor and condenser.
  • the refrigerant vapor is passed from the motor casing to the inlet of the compressor and the liquid refrigerant is conveyed from the auxiliary condenser to the motor casing.
  • a separate lubricating system is necessary to provide oil to the motor bearings.
  • the motor bearings are sealed off to prevent the leakage of oil from the bearings into the refrigerant in the motor casing. It is necessary to periodically inspect the seals to make certain that the oil is not leaking into the refrigerant, especially where the LII compressor is of the reciprocating piston type.
  • a separate lubricating system is necessary to provide oil to the motor bearings.
  • the motor bearings are sealed off to prevent the leakage of oil from the bearings into the refrigerant in the motor casing. It is necessary to periodically inspect the seals to make certain that the oil is not leaking into the refrigerant, especially where the LII compressor is of the reciprocating piston type
  • the refrigerant is passed directly from the main refrigerating apparatus to the motor casing. That arrangement has the same disadvantage in regard to supplying the lubricant to the motor bearings.
  • the hermetically sealed motor casing is provided with the supply of mixture containing refrigerant and lubricating oil.
  • a passage extends from the upper portion of the motor casing to the auxiliary condenser, and a passage from the condenser to the motor casing for the return of liquid refrigerant.
  • Means is provided for maintaining the refrigerant oil mixture in the motor casing at a selected level.
  • a flow metering means in a line extending from the main condenser to the cooling coil in the auxiliary condenser and is arranged to meter the refrigerant through the coil so as to maintain a flow of liquid refrigerant and oil mixtures from the auxiliary condenser to the motor casing sufficient to properly cool the motor when operated consistently under full load.
  • the refrigeration system disclosed in the drawing includes a centrifugal type compressor operable to draw refrigerant vapor from the cooler 11 through a passageway 12. The compressed vapor is discharged from the compressor through a line 13 to a condenser 14.
  • the condenser is provided with a refrigerant sump containing a flow control metering valve 21 for the discharge of liquid refrigerant through line 23 to the lower portion of the cooler 11.
  • the motor for driving the compressor 10 includes a stator 25 and a rotor 27.
  • the rotor 27 is journaled for rotation in bearigs 30, 31 mounted in the end walls 33-, 35 of the hermetically sealed casing 37.
  • a first passageway extends from the upper portion of the casing 37 to an auxiliary condenser 41.
  • a heat exchanging coil 43 is mounted in the condenser 4l.and is supplied with liquid refrigerant from the main condenser 14 through a line 44 which includes a flow control device 45. Refrigerant is returned from the heat exchanger 43 to the cooler. As shown in the drawing. the return line from the heat exchanger 43 is connected in line 23.
  • Liquid refrigerant is conveyed from the auxiliary condenser 41 to the motor casing 37 by line 47.
  • a supply of a mixture containing a refrigerant and a lubricating oil is maintained in the lower portion of the motor casing 37.
  • the refrigerant vapor passing through the passage 40 to the auxiliary condenser contains a quantity of the lubricating oil entrained therein.
  • the refrigerant vapor is condensed in the condenser 41 and returned through the passage 47, together with the oil entrained in the vapor.
  • the mixture is maintained at a predetermined level indicated at by a metering valve 51 operated by a float 52.
  • the valve 51 is mounted in a chamber 53.
  • a pump 55 driven by a motor 56 operates to pump the mixture from the motor casing 37 through a line 57 for discharge onto the bearing 30 and against the confronting end of the rotor 27.
  • the mixture is also pumped through line 60 to the bearing 31 and to the shaft seal 62.
  • the auxiliary condenser 41 is cooled with refrigerant from the main condenser 14, the mixture flowing through the return passage 47 to the motor casing is at an exceptionally low temperature.
  • the motor is cooled to a temperature substantially equal to the temperature in the cooler 11. This results in maintaining the oil in the mixture at high viscosity to provide good lubrication.
  • This arrangement has the advantage of permitting the use of a refrigerant in the mixture different from the refrigerant in the refrigeration apparatus.
  • the meter device 45 may be in the form of a fixed orifice or an adjustable valve. In any event, the flow through the return passage 47 is such as to'provide proper cooling of the motor when operated consistently at full load.
  • the mixture may consist of 40 50 percent oil and 50. 60 percent refrigerant.
  • a refrigeration system including a compressor, a condenser and a cooler, a'motor operatively connected to the compressor for operating the same, said motor being mounted in a hermetically sealed'casing, a quantity of mixture of a refrigerant and a lubricating oil in the motor casing, a passage extending from the upper portion of the motor casing to an auxiliary condenser and a second passage extending from the auxiliary condenser to the motor casing, means for maintaining said mixture at a selected level in the motor casing, a heat exchanging coil mounted in said auxiliary condenser, a refrigerant line extending from the apparatus condenser to said heat exchanger and a return line extending from the heat exchanger to the cooler of the apparatus, a flow metering device in said line from said apparatus condenser to said heat exchanger and operable to meter a flow of refrigerant from the apparatus condenser to said heat exchanger, said flow being sufficient to effectively cool the motor operating under maximum load

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The open drive motor for a refrigeration apparatus is mounted in a hermetic casing containing a quantity of a mixture consisting of a refrigerant and a lubricating oil. A passage extends from the upper portion of the casing to an auxiliary condenser, and a second passage returns condensed mixture to the motor casing. The auxiliary condenser is cooled by a metered flow of refrigerant from the condenser of the apparatus. The flow is metered to supply the condensed mixture in sufficient quantity to effectively cool the motor during continuous operation of the motor at full load.

Description

United States Patent Endress REFRIGERATOR APPARATUS INCLUDING MOTOR COOLING MEANS [75] Inventor: James W. Endress, Syracuse, NY.
[73] Assignee: Carrier Corporation, Syracuse, NY.
[22] Filed: Oct. 29, 1973 [21] Appl. No.: 410,665
[52] US. Cl. 62/468, 62/505 [51] Int. Cl. F25b 31/00 [58] Field of Search 62/84, 468, 505
[56] References Cited UNITED STATES PATENTS 3,163,999 1/1965 Ditzler 3,422,635 l/1969 Trenkowitz 3,563,051 2/1971 Brumgartner 62/468 Oct. 1, 1974 Primary ExaminerMeyer Perlin Attorney, Agent, or FirmJ. Raymond Curtain 57 ABSTRACT The open drive motor for a refrigeration apparatus is mounted in a hermetic casing containing a quantity of a mixture consisting of a refrigerant and a lubricating oil. A passage extends from the upper portion of the casing to an auxiliary condenser, and a second passage returns condensed mixture to the motor casing. The auxiliary condenser is cooled by a metered flow of refrigerant from the condenser of the apparatus. The flow is metered to supply the condensed mixture in sufficient quantity to effectively cool the motor during continuous operation of the motor at full load.
2 Claims, 1 Drawing Figure REFRIGERATOR APPARATUS INCLUDING MOTOR COOLING MEANS BACKGROUND OF THE INVENTION In certain refrigeration systems the compressor is operated by an open drive motor. The open drive motor is mounted externally of, and separate from, the compressor, as distinguished from an enclosed drive wherein the motor is mounted in the compressor housing. The advantages of an open drive motor are well known, especially in that the motor can be quickly and conveniently serviced and replaced if necessary. Also, if desired, the motor can be replaced by a turbine or other primer mover. The advantage of a refrigerant cooled motor is also well known. The main advantage being in that the rating of the motor may be reduced 25 percent or more. This effects a saving of several thousand dollars in motor costs for a motor drive on large tonnage refrigeration apparatus.
Various arrangements have been proposed to cool open drive motors by refrigeration. In one arrangement, there is provided an auxiliary compressor and condenser. The refrigerant vapor is passed from the motor casing to the inlet of the compressor and the liquid refrigerant is conveyed from the auxiliary condenser to the motor casing. In that arrangement, a separate lubricating system is necessary to provide oil to the motor bearings. The motor bearings are sealed off to prevent the leakage of oil from the bearings into the refrigerant in the motor casing. It is necessary to periodically inspect the seals to make certain that the oil is not leaking into the refrigerant, especially where the LII compressor is of the reciprocating piston type. Also, a
separate compressor has to be operated and maintained. In another arrangement, the refrigerant is passed directly from the main refrigerating apparatus to the motor casing. That arrangement has the same disadvantage in regard to supplying the lubricant to the motor bearings.
SUMMARY OF THE INVENTION In this invention, the hermetically sealed motor casing is provided with the supply of mixture containing refrigerant and lubricating oil. A passage extends from the upper portion of the motor casing to the auxiliary condenser, and a passage from the condenser to the motor casing for the return of liquid refrigerant. Means is provided for maintaining the refrigerant oil mixture in the motor casing at a selected level. There is a flow metering means in a line extending from the main condenser to the cooling coil in the auxiliary condenser and is arranged to meter the refrigerant through the coil so as to maintain a flow of liquid refrigerant and oil mixtures from the auxiliary condenser to the motor casing sufficient to properly cool the motor when operated consistently under full load.
BRIEF DESCRIPTION OF THE DRAWING The drawing discloses a schematic view of a refrigeration system, the compressor of which is driven by a motor embodying my invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT The refrigeration system disclosed in the drawing includes a centrifugal type compressor operable to draw refrigerant vapor from the cooler 11 through a passageway 12. The compressed vapor is discharged from the compressor through a line 13 to a condenser 14.
The condenser is provided with a refrigerant sump containing a flow control metering valve 21 for the discharge of liquid refrigerant through line 23 to the lower portion of the cooler 11. I
The motor for driving the compressor 10 includes a stator 25 and a rotor 27. The rotor 27 is journaled for rotation in bearigs 30, 31 mounted in the end walls 33-, 35 of the hermetically sealed casing 37.
A first passageway extends from the upper portion of the casing 37 to an auxiliary condenser 41. A heat exchanging coil 43 is mounted in the condenser 4l.and is supplied with liquid refrigerant from the main condenser 14 through a line 44 which includes a flow control device 45. Refrigerant is returned from the heat exchanger 43 to the cooler. As shown in the drawing. the return line from the heat exchanger 43 is connected in line 23.
Liquid refrigerant is conveyed from the auxiliary condenser 41 to the motor casing 37 by line 47. A supply of a mixture containing a refrigerant and a lubricating oil is maintained in the lower portion of the motor casing 37. The refrigerant vapor passing through the passage 40 to the auxiliary condenser contains a quantity of the lubricating oil entrained therein. The refrigerant vapor is condensed in the condenser 41 and returned through the passage 47, together with the oil entrained in the vapor. The mixture is maintained at a predetermined level indicated at by a metering valve 51 operated by a float 52. The valve 51 is mounted in a chamber 53.
A pump 55 driven by a motor 56 operates to pump the mixture from the motor casing 37 through a line 57 for discharge onto the bearing 30 and against the confronting end of the rotor 27. The mixture is also pumped through line 60 to the bearing 31 and to the shaft seal 62.
Inasmuch as the auxiliary condenser 41 is cooled with refrigerant from the main condenser 14, the mixture flowing through the return passage 47 to the motor casing is at an exceptionally low temperature. The motor is cooled to a temperature substantially equal to the temperature in the cooler 11. This results in maintaining the oil in the mixture at high viscosity to provide good lubrication. This arrangement has the advantage of permitting the use of a refrigerant in the mixture different from the refrigerant in the refrigeration apparatus.
The meter device 45 may be in the form of a fixed orifice or an adjustable valve. In any event, the flow through the return passage 47 is such as to'provide proper cooling of the motor when operated consistently at full load. Employing refrigerants conventionally used and conventional types of lubricating oils, the mixture may consist of 40 50 percent oil and 50. 60 percent refrigerant.
While I have described the preferred embodiments of my invention, it is to be understood that the invention is not limited thereto, but may be otherwise embodied within the scope of the following claims.
I claim:
1. A refrigeration system including a compressor, a condenser and a cooler, a'motor operatively connected to the compressor for operating the same, said motor being mounted in a hermetically sealed'casing, a quantity of mixture of a refrigerant and a lubricating oil in the motor casing, a passage extending from the upper portion of the motor casing to an auxiliary condenser and a second passage extending from the auxiliary condenser to the motor casing, means for maintaining said mixture at a selected level in the motor casing, a heat exchanging coil mounted in said auxiliary condenser, a refrigerant line extending from the apparatus condenser to said heat exchanger and a return line extending from the heat exchanger to the cooler of the apparatus, a flow metering device in said line from said apparatus condenser to said heat exchanger and operable to meter a flow of refrigerant from the apparatus condenser to said heat exchanger, said flow being sufficient to effectively cool the motor operating under maximum load, a pump operable to circulate the mixture in said erant and 50 percent lubricating oil.

Claims (1)

  1. 2. Apparatus as set forth in claim 1 wherein the mixture in said motor casing consists of 50 percent refrigerant and 50 percent lubricating oil.
US00410665A 1973-10-29 1973-10-29 Refrigerator apparatus including motor cooling means Expired - Lifetime US3838581A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US00410665A US3838581A (en) 1973-10-29 1973-10-29 Refrigerator apparatus including motor cooling means
ZA00746414A ZA746414B (en) 1973-10-29 1974-10-08 Refrigeration apparatus including motor cooling means
GB43791/74A GB1487071A (en) 1973-10-29 1974-10-09 Refrigeration apparatus including motor cooling means
AU74243/74A AU487837B2 (en) 1973-10-29 1974-10-11 Refrigeration apparatus including motor cooling means
IT28440/74A IT1022886B (en) 1973-10-29 1974-10-15 REFRIGERATION EQUIPMENT INCLUDING ENGINE REFRIGERATION MEANS
DE19742450169 DE2450169A1 (en) 1973-10-29 1974-10-22 COOLING MACHINE WITH A COOLING DEVICE FOR THE ENGINE
BR8827/74A BR7408827D0 (en) 1973-10-29 1974-10-23 REFRIGERATION APPLIANCE
JP49123274A JPS5074241A (en) 1973-10-29 1974-10-25
NL7413982A NL7413982A (en) 1973-10-29 1974-10-25 COOLING SYSTEM.
FR7435852A FR2249473B1 (en) 1973-10-29 1974-10-25
BE149910A BE821513A (en) 1973-10-29 1974-10-25 REFRIGERATION UNIT INCLUDING AN ENGINE COOLING DEVICE
ES431405A ES431405A1 (en) 1973-10-29 1974-10-26 Refrigerator apparatus including motor cooling means
SE7413528A SE409618B (en) 1973-10-29 1974-10-28 COOLING DEVICE INCLUDING ENGINE COOLING DEVICES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00410665A US3838581A (en) 1973-10-29 1973-10-29 Refrigerator apparatus including motor cooling means

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US3838581A true US3838581A (en) 1974-10-01

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US00410665A Expired - Lifetime US3838581A (en) 1973-10-29 1973-10-29 Refrigerator apparatus including motor cooling means

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US (1) US3838581A (en)
JP (1) JPS5074241A (en)
BE (1) BE821513A (en)
BR (1) BR7408827D0 (en)
DE (1) DE2450169A1 (en)
ES (1) ES431405A1 (en)
FR (1) FR2249473B1 (en)
GB (1) GB1487071A (en)
IT (1) IT1022886B (en)
NL (1) NL7413982A (en)
SE (1) SE409618B (en)
ZA (1) ZA746414B (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4669279A (en) * 1985-03-19 1987-06-02 Ebara Corporation Motor cooling apparatus for refrigerator
US4747276A (en) * 1986-04-15 1988-05-31 Seiko Seiki Kabushiki Kaisha Helium compressor apparatus
US4890461A (en) * 1987-07-21 1990-01-02 Bernard Zimmern Hermetic or semi-hermetic refrigeration motor-compressor unit
US4899555A (en) * 1989-05-19 1990-02-13 Carrier Corporation Evaporator feed system with flash cooled motor
US5848538A (en) * 1997-11-06 1998-12-15 American Standard Inc. Oil and refrigerant pump for centrifugal chiller
US6065297A (en) * 1998-10-09 2000-05-23 American Standard Inc. Liquid chiller with enhanced motor cooling and lubrication
US6098422A (en) * 1998-12-03 2000-08-08 American Standard Inc. Oil and refrigerant pump for centrifugal chiller
US6176092B1 (en) 1998-10-09 2001-01-23 American Standard Inc. Oil-free liquid chiller
US20050284173A1 (en) * 2004-06-29 2005-12-29 York International Corporation System and method for cooling a compressor motor
US20070186581A1 (en) * 2006-02-14 2007-08-16 Ingersoll-Rand Company Compressor cooling system
US20070212232A1 (en) * 2004-06-29 2007-09-13 Johnson Controls Technology Company System and method for cooling a compressor motor
US20120240614A1 (en) * 2004-12-22 2012-09-27 Johnson Controls Technology Company Medium voltage power controller
US20140363311A1 (en) * 2012-02-07 2014-12-11 Johnson Controls Technology Company Hermetic motor cooling and control
CN104979960A (en) * 2015-07-14 2015-10-14 国家电网公司 External evaporation-type cooling system for generator motor
US9178405B2 (en) 2011-05-13 2015-11-03 Carrier Corporation Magnetic drive coupling apparatus
US20160040915A1 (en) * 2013-03-25 2016-02-11 Carrier Corporation Compressor Bearing Cooling
US20170097007A1 (en) * 2014-03-18 2017-04-06 Carrier Corporation Refrigerant lube system
CN107429680A (en) * 2015-03-19 2017-12-01 三菱重工制冷空调系统株式会社 Driven compressor motor and its cooling means

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163999A (en) * 1962-08-01 1965-01-05 Westinghouse Electric Corp Centrifugal compressor lubricating and motor cooling systems
US3422635A (en) * 1967-03-21 1969-01-21 Bbc Brown Boveri & Cie Lubricating and cooling system for electric motors
US3563051A (en) * 1968-08-13 1971-02-16 Thermomeccanica Italiana Apparatus for lubricating the compressor of a refrigerating installation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393528A (en) * 1966-12-01 1968-07-23 Carrier Corp Refrigeration machine with lubricant cooling

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163999A (en) * 1962-08-01 1965-01-05 Westinghouse Electric Corp Centrifugal compressor lubricating and motor cooling systems
US3422635A (en) * 1967-03-21 1969-01-21 Bbc Brown Boveri & Cie Lubricating and cooling system for electric motors
US3563051A (en) * 1968-08-13 1971-02-16 Thermomeccanica Italiana Apparatus for lubricating the compressor of a refrigerating installation

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4669279A (en) * 1985-03-19 1987-06-02 Ebara Corporation Motor cooling apparatus for refrigerator
US4747276A (en) * 1986-04-15 1988-05-31 Seiko Seiki Kabushiki Kaisha Helium compressor apparatus
US4890461A (en) * 1987-07-21 1990-01-02 Bernard Zimmern Hermetic or semi-hermetic refrigeration motor-compressor unit
US4899555A (en) * 1989-05-19 1990-02-13 Carrier Corporation Evaporator feed system with flash cooled motor
US5848538A (en) * 1997-11-06 1998-12-15 American Standard Inc. Oil and refrigerant pump for centrifugal chiller
US6065297A (en) * 1998-10-09 2000-05-23 American Standard Inc. Liquid chiller with enhanced motor cooling and lubrication
US6176092B1 (en) 1998-10-09 2001-01-23 American Standard Inc. Oil-free liquid chiller
US6279340B1 (en) 1998-10-09 2001-08-28 American Standard International Inc. Oil-free liquid chiller
US6098422A (en) * 1998-12-03 2000-08-08 American Standard Inc. Oil and refrigerant pump for centrifugal chiller
US6250101B1 (en) * 1998-12-03 2001-06-26 American Standard International Inc. Oil and refrigerant pump for centrifugal chiller
US6250102B1 (en) * 1998-12-03 2001-06-26 American Standard International Inc. Oil and refrigerant pump for centrifugal chiller
US20070212232A1 (en) * 2004-06-29 2007-09-13 Johnson Controls Technology Company System and method for cooling a compressor motor
US20050284173A1 (en) * 2004-06-29 2005-12-29 York International Corporation System and method for cooling a compressor motor
US8021127B2 (en) 2004-06-29 2011-09-20 Johnson Controls Technology Company System and method for cooling a compressor motor
US8465265B2 (en) 2004-06-29 2013-06-18 Johnson Controls Technology Company System and method for cooling a compressor motor
US7181928B2 (en) 2004-06-29 2007-02-27 York International Corporation System and method for cooling a compressor motor
US20120240614A1 (en) * 2004-12-22 2012-09-27 Johnson Controls Technology Company Medium voltage power controller
US8590329B2 (en) * 2004-12-22 2013-11-26 Johnson Controls Technology Company Medium voltage power controller
US8820105B2 (en) 2004-12-22 2014-09-02 Johnson Controls Technology Company Medium voltage power controller
US20070186581A1 (en) * 2006-02-14 2007-08-16 Ingersoll-Rand Company Compressor cooling system
US9178405B2 (en) 2011-05-13 2015-11-03 Carrier Corporation Magnetic drive coupling apparatus
US20140363311A1 (en) * 2012-02-07 2014-12-11 Johnson Controls Technology Company Hermetic motor cooling and control
US9291167B2 (en) * 2012-02-07 2016-03-22 Johnson Controls Technology Company Hermetic motor cooling and control
US20160040915A1 (en) * 2013-03-25 2016-02-11 Carrier Corporation Compressor Bearing Cooling
US10228168B2 (en) * 2013-03-25 2019-03-12 Carrier Corporation Compressor bearing cooling
US20170097007A1 (en) * 2014-03-18 2017-04-06 Carrier Corporation Refrigerant lube system
US10527050B2 (en) * 2014-03-18 2020-01-07 Carrier Corporation Refrigerant lube system
CN107429680A (en) * 2015-03-19 2017-12-01 三菱重工制冷空调系统株式会社 Driven compressor motor and its cooling means
CN104979960A (en) * 2015-07-14 2015-10-14 国家电网公司 External evaporation-type cooling system for generator motor

Also Published As

Publication number Publication date
IT1022886B (en) 1978-04-20
SE7413528L (en) 1975-04-30
GB1487071A (en) 1977-09-28
DE2450169A1 (en) 1975-04-30
JPS5074241A (en) 1975-06-18
SE409618B (en) 1979-08-27
FR2249473A1 (en) 1975-05-23
FR2249473B1 (en) 1982-01-08
ES431405A1 (en) 1976-10-16
BE821513A (en) 1975-02-17
NL7413982A (en) 1975-05-02
ZA746414B (en) 1975-10-29
AU7424374A (en) 1976-04-15
BR7408827D0 (en) 1975-09-23

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