Cooling Motor And/or Compressor By Refrigerant Patents (Class 62/505)
  • Patent number: 10879769
    Abstract: A motor unit includes a motor including a rotor to rotate about a motor axis extending in a horizontal direction, a differential connected to the motor, a housing including a housing space to house the motor and the differential, oil in a vertically lower region of the housing space, and an oil passage to feed the oil from the vertically lower region of the housing space to the motor. A pump is fixed to an outer peripheral surface of the housing and is located in a channel of the oil passage. The pump is on an opposite side of the motor axis with respect to the differential when viewed in an axial direction of the motor axis.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: December 29, 2020
    Assignee: NIDEC CORPORATION
    Inventors: Yuki Ishikawa, Yasuo Yamaguchi, Takayuki Migita
  • Patent number: 10591188
    Abstract: A refrigeration cycle device includes a refrigeration cycle formed by connecting a compressor, a condenser, an expansion valve and an evaporator to each other. As a refrigerant in the refrigeration cycle, a working fluid containing 1,1,2-trifluoroethylene (R1123) and difluoromethane (R32) is used. A degree of opening of the expansion valve is controlled such that the refrigerant has two phases at a suction portion of the compressor.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: March 17, 2020
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Fuminori Sakima, Akira Fujitaka, Shigehiro Sato, Kenji Takaichi, Yoshikazu Kawabe, Hiroaki Nakai
  • Patent number: 10523068
    Abstract: A stator of an electric machine for a hybrid vehicle or electric vehicle includes: a substantially cylinder-jacket-shaped, axially extending stator carrier. The stator carrier is configured to carry a lamination stack having a plurality of stator teeth substantially annularly arranged and has a radially inwardly extending shoulder edge configured so as to axially support the lamination stack. At least one cutout is formed at the shoulder edge of the stator carrier.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: December 31, 2019
    Assignee: ZF Friedrichshafen AG
    Inventors: Klaus Geidel, Matthias Weidner, Alexander Schäflein, Matthias Cudok
  • Patent number: 10465962
    Abstract: A system may include first and second compressors, first and second heat exchangers, a flash tank, and first, second and third fluid paths. The first compressor may include first and second inlets. The second compressor may receive fluid from an outlet of the first compressor. The first heat exchanger may receive fluid from the second compressor. The flash tank may receive fluid from the first heat exchanger and includes a vapor outlet and a liquid outlet. The second heat exchanger may be in fluid communication with the flash tank and may receive fluid from the liquid outlet. The first fluid path extends from an outlet of the second heat exchanger to an inlet of the second compressor. The second fluid path extends from the vapor outlet to the first fluid path. The third fluid path may transmit fluid from the vapor outlet to the second inlet.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: November 5, 2019
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Kirill M. Ignatiev, Michael M. Perevozchikov
  • Patent number: 10280938
    Abstract: A motorcompressor unit includes a first motor driving the rotation of a rotor and a compression stage including a bladed impeller mounted on a driven shaft, the rotation of which is driven by the rotor. Also, common casing is gastight with respect to fluid handled by the motorcompressor unit, where the compression stage and the first motor are mounted in the common casing. The compression stage also includes a regulating member that regulates the angle at which the fluid flows to or from the bladed impeller, and a second motor that controls the regulating member, the second motor being mounted in the common casing.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: May 7, 2019
    Assignee: THERMODYN
    Inventor: Gilles Nawrocki
  • Patent number: 10156384
    Abstract: A climate control system is provided and may include a compressor, a first heat exchanger, a second heat exchanger, and a coolant flow path. The compressor may include a suction port, a first discharge port and a second discharge port. The first heat exchanger may be in fluid communication with the first discharge port. The second heat exchanger may be in fluid communication with the second discharge port. The coolant flow path may be in fluid communication with the first heat exchanger and the second heat exchanger.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: December 18, 2018
    Assignee: Emerson Climate Technologies, Inc.
    Inventor: Kirill Ignatiev
  • Patent number: 9291167
    Abstract: An apparatus and method for cooling a compressor motor (152)having a motor stator (162) and rotor (166)in a refrigerant system(100). The method cools the rotor and the stator, electromagnetic bearings (160)located within a compressor housing providing refrigerant liquid to the stator internal channels, the channels being in fluid communication with a rotor passageway (172), and a flow-control device (168) controlling refrigerant flow into the stator. A temperature monitoring device (176) in communication with a controller (140) monitors motor temperature. The controller (140)evaluates the motor temperature and adjusts refrigerant flow through the flow control device (168), maintaining the motor (152) within a predetermined temperature range.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: March 22, 2016
    Assignee: Johnson Controls Technology Company
    Inventor: Jeb W. Schreiber
  • Patent number: 9212661
    Abstract: An electric compressor includes a housing, an electric motor, a compression mechanism, and a resin molding. The electric motor includes a coil having coil ends projecting from each of two end surfaces of the stator. Refrigerant flows through the housing that accommodates the electric motor. The resin molding covers each coil end and includes an opening that exposes part of the coil end to the interior of the housing.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: December 15, 2015
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hiroshi Fukasaku, Shozo Hamana
  • Patent number: 9148041
    Abstract: An electric machine (1) has a hollow rotor shaft (3) and a stationary cooling lance (13) that penetrates the hollow shaft (3) axially. The cooling lance (13) has an inlet (16) and an outlet (17) for a cooling medium. A cooling duct (18) penetrates the cooling lance (13) axially and is connected to the inlet (16) and the outlet (17) for guiding the cooling medium through the cooling lance (13). The cooling lance (13) also has an inlet (24) and an outlet (25) for oil. An oil duct (26) penetrates the cooling lance (13) axially and is connected to the oil inlet (24) and outlet (25) for guiding the oil through the cooling lance (13). The outlet (25) for the oil is connected to an annular space (27) between the cooling lance (13) and the rotor shaft (3). The annular space (27) has an opening (28) for the oil.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: September 29, 2015
    Assignee: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventor: Daniel Knoblauch
  • Patent number: 9054565
    Abstract: Embodiments of the invention provide an electric machine module including a housing. In some embodiments, the housing can include a sleeve member coupled to at least one end cap. The housing can include an inner wall at least partially defining a machine cavity, a coolant sump, and at least one coolant channel positioned between the inner wall and an outer wall of the housing. In some embodiments, the coolant channel can be in fluid communication with the coolant sump. In some embodiments, an electric machine can be positioned in the machine cavity. The electric machine can comprise a stator assembly including stator end turns and a rotor assembly. In some embodiments, a coolant jacket can be at least partially defined by the housing and can be positioned so that to at least partially circumscribe a portion of the stator assembly.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: June 9, 2015
    Assignee: Remy Technologies, LLC
    Inventor: David A. Fulton
  • Patent number: 8959950
    Abstract: A high efficiency, low maintenance single stage or multi-stage centrifugal compressor assembly for large cooling installations. A cooling system provides direct, two-phase cooling of the rotor by combining gas refrigerant from the evaporator section with liquid refrigerant from the condenser section to affect a liquid/vapor refrigerant mixture. Cooling of the stator with liquid refrigerant may be provided by a similar technique. A noise suppression system is provided by injecting liquid refrigerant spray at points between the impeller and the condenser section. The liquid refrigerant may be sourced from high pressure liquid refrigerant from the condenser section.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: February 24, 2015
    Assignee: Daikin Applied Americas Inc.
    Inventors: Mark C. Doty, Earl A. Champaigne, Thomas E. Watson, Paul K. Butler, Quentin E. Cline, Samuel J. Showalter
  • Patent number: 8955323
    Abstract: To improve the exhaust heat recovery efficiency, a compressor includes a heat exchanger for cooling a gas, coolant, water, or oil heated by the compressor during compressor operation by heat exchange with a working fluid, for circulating the working fluid of a Rankine cycle. The Rankine cycle is implemented by the heat exchanger, an expander, a condenser, and a circulating pump to circulate the working fluid through the cycle.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: February 17, 2015
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventor: Yuji Kamiya
  • Patent number: 8931304
    Abstract: An example compressor arrangement includes a first compressor portion configured to compress a fluid and a second compressor portion configured to compress the fluid more than the first compressor portion. The compressor arrangement also includes a motor disposed between the first compressor portion and the second compressor portion. The first compressor portion is configured to communicate the fluid to the second compressor portion along a primary flow path. The second compressor portion is configured to divert at least some of the fluid from the primary flow path, communicating the diverted fluid back to the first compressor portion along a secondary flow path.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: January 13, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Craig M. Beers, Christopher McAuliffe
  • Publication number: 20140360210
    Abstract: A refrigeration chiller employs a centrifugal compressor the impellers of which are mounted on a shaft which is itself mounted for rotation using rolling element bearings lubricated only by the refrigerant which constitutes the working fluid of the chiller system. Apparatus is taught for providing liquid refrigerant to (1.) the bearings immediately upon chiller start-up, during chiller operation and during a coastdown period subsequent to shutdown of the chiller and (2.) the drive motor of the chiller's compressor for motor cooling purposes. By use of a variable speed-driven motor to drive the compressor, optimized part load chiller performance is achieved in a chiller which does not require or employ an oil-based lubrication system.
    Type: Application
    Filed: December 5, 2012
    Publication date: December 11, 2014
    Inventors: William E. Lapp, Todd W. Smith, Arthur L. Butterworth, Paul J. Sikorsky
  • Patent number: 8863548
    Abstract: A cabin air compressor assembly includes a cabin air compressor disposed at a compressor inlet and a cabin air compressor motor operably connected to the cabin air compressor. At least one cooling flow inlet is located at a first end of the cabin air compressor motor substantially opposite a second end whereat the cabin air compressor is located. The cooling flow inlet is configured to direct a cooling flow across the cabin air compressor motor. A blower is operably connected to the cabin air compressor and is configured to urge a cooling flow from across the cabin air compressor motor toward a cooling flow outlet, thereby increasing the cooling flow across the cabin air compressor motor.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: October 21, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Harold W. Hipsky
  • Patent number: 8857211
    Abstract: In an injectible two-staged rotary compressor, a second suction pipe includes a heat-exchange promoting unit that promotes heat exchange between intermediary-pressure injected refrigerant and internal space or an external surface of a sealed container. The heat being exchanged by the intermediary-pressure injected refrigerant absorbing heat.
    Type: Grant
    Filed: March 10, 2008
    Date of Patent: October 14, 2014
    Assignee: Fujitsu General Limited
    Inventors: Naoya Morozumi, Kenshi Ueda
  • Patent number: 8806888
    Abstract: An air conditioning system includes a phase separator separating a gaseous refrigerant and a liquid refrigerant from a flowing refrigerant, an evaporator evaporating the liquid refrigerant separated by the phase separator, and at least one compressor including a first compressing part receiving the refrigerant via the evaporator and a second compressing part receiving both of the gaseous refrigerant separated by the phase separator and the refrigerant via the first compressing part.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: August 19, 2014
    Assignee: LG Electronics Inc.
    Inventors: Young Hwan Ko, Hyuk Soo Lee, Bum Suk Kim, Sang Kyoung Park, Byung Soon Kim
  • Patent number: 8794027
    Abstract: A compressor includes a casing, a screw rotor, a slide member with at least one economizer port, and a control unit controlling a position of the slide member along the axis of the screw rotor to position the at least one economizer port based on the rotating speed of the screw rotor to advance the timing of opening of the at least one economizer port. The controller controls the position of the slide member along the axis such that the slide member moves upstream toward a suction side of the compressor when the rotating speed of the screw rotor increases, and downstream toward a discharge side of the compressor when the rotating speed of the screw rotor decreases. A refrigerating apparatus includes the compressor, a condenser, a heat exchanger, an expansion unit, and an evaporator, sequentially connected, and has an economizer line.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: August 5, 2014
    Assignee: Daikin Industries, Ltd.
    Inventors: Nozomi Gotou, Harunori Miyamura, Hideyuki Gotou
  • Patent number: 8789382
    Abstract: A heat pump including at least two refrigerant injection flow paths into a scroll compressor and a main circuit. The main circuit includes a scroll compressor, a condenser, an expansion valve, a phase separator, and an evaporator for evaporating refrigerant. The scroll compressor is provided with a first refrigerant injection port between an inlet of the scroll compressor and an outlet of the scroll compressor, and a second refrigerant injection port between the inlet and the first refrigerant injection port. A first refrigerant injection flow path is bypassed from the phase separator. An internal heat exchanger is installed between the phase separator and the evaporator. A second refrigerant injection flow path is bypassed between the phase separator and the internal heat exchanger. The second refrigerant injection flow path is passed through the internal heat exchanger.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: July 29, 2014
    Assignee: LG Electronics Inc.
    Inventors: Younghwan Ko, Sangkyoung Park, Yonghee Jang, Bumsuk Kim
  • Publication number: 20140069139
    Abstract: A compressor may include a shell assembly, a compression mechanism and a conduit. The shell assembly may include a fitting through which fluid is received from outside of the compressor. The compression mechanism may be disposed within a chamber defined by the shell assembly. The conduit may extend through the chamber between the fitting and a suction inlet of the compression mechanism and transmit at least a portion of the fluid from the fitting to the suction inlet. The conduit may include an inlet that may be spaced apart from the fitting and an outlet that may engage the compression mechanism.
    Type: Application
    Filed: September 13, 2013
    Publication date: March 13, 2014
    Applicant: Emerson Climate Technologies, Inc.
    Inventors: Michael M. Perevozchikov, Roy J. Doepker, Matthew Thomas Piscopo, Eric P. Cavender, Brian L. Reid, Kevin J. Gehret, Stephen Barry Tummino
  • Patent number: 8528359
    Abstract: A refrigerant vapor compression system includes a compression device, a heat rejecting heat exchanger, an economizer heat exchanger, an expander and an evaporator disposed in a refrigerant circuit. An evaporator bypass line is provided for passing a portion of the refrigerant flow from the main refrigerant circuit after having traversed a first pass of the economizer heat exchanger through the expander to partially expand it to an intermediate pressure and thence through a second pass of the economizer heat exchanger and into an intermediate pressure stage of the compression device. An economizer bypass line is also provided for passing a portion of the refrigerant from the main refrigerant circuit after having traversed the heat rejecting heat exchanger through a restrictor type expansion device and thence into the evaporator bypass line as liquid refrigerant or a mix of liquid and vapor refrigerant for injection into an intermediate pressure stage of the compression device.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: September 10, 2013
    Assignee: Carrier Corporation
    Inventors: Alexander Lifson, Michael F. Taras
  • Patent number: 8516850
    Abstract: A cooling system for a motor powering a compressor in a vapor compression system includes a housing and a cavity within the housing. A first fluid circuit has a first connection to receive a refrigerant into the cavity, and a second connection to deliver refrigerant from the cavity to a heat exchanger for a heat transfer relationship with a heat-generating component.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: August 27, 2013
    Assignee: Johnson Controls Technology Company
    Inventors: Ivan Jadric, Steven J Estes, John C Hansen, Koman B Nambiar, Andrew M Welch, Steven T Sommer, Gregory K Beaverson
  • Patent number: 8465265
    Abstract: Apparatus and methods are provided for cooling motors used to drive gas and air compressors. In particular, the cooling of hermetic and semi-hermetic motors is accomplished by a gas sweep using a gas source located in the low-pressure side of a gas compression circuit. The gas sweep is provided by the creation of a pressure reduction at the compressor inlet sufficient to draw uncompressed gas through a motor housing, across the motor, and out of the housing for return to the suction assembly. The pressure reduction is created by means provided in the suction assembly, such as a nozzle and gap assembly, or alternatively a venturi, located upstream of the compressor inlet. Additional motor cooling can be provided by circulating liquid or another cooling fluid through a cooling jacket in the motor housing portion adjacent the motor.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: June 18, 2013
    Assignee: Johnson Controls Technology Company
    Inventor: Paul de Larminat
  • Publication number: 20130139531
    Abstract: Inventive embodiments are directed to components, subassemblies, systems, and/or methods for a refrigeration system having a compressor operably coupled to continuously variable accessory drive (CVAD). In one embodiment, the refrigerant is adapted to cool the CVAD. In another embodiment, the refrigerant is configured to actuate a change in operating condition of the CVAD. A change in operating condition of the CVAD can be based at least in part on the thermodynamic state, such as pressure or temperature, of the refrigerant. In one embodiment, a skew-based control system is adapted to facilitate a change in the ratio of a CVAD. In another embodiment, a skew-based control system includes a skew actuator coupled to a carrier member. In some embodiments, the skew actuator is configured to rotate a carrier member of a CVT. Among other things, shift control interfaces for a CVT are disclosed.
    Type: Application
    Filed: October 2, 2012
    Publication date: June 6, 2013
    Applicant: FALLBROOK INTELLECTUAL PROPERTY COMPANY LLC
    Inventor: FALLBROOK INTELLECTUAL PROPERTY COMP
  • Patent number: 8434323
    Abstract: A cooling system for a motor powering a compressor in a vapor compression system includes a housing enclosing the motor and a cavity located within the housing. A fluid circuit circulates a cooling fluid in the motor, and includes a first connection in the housing to receive cooling fluid and a second connection in the housing to remove cooling fluid. The fluid circuit includes a passageway for cooling fluid positioned in an internal chamber formed in a motor shaft.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: May 7, 2013
    Assignee: Johnson Controls Technology Company
    Inventors: Andrew M Welch, Steven J Estes, John C Hansen, Steven T Sommer, Gregory K Beaverson
  • Patent number: 8424339
    Abstract: A motor coolant method and system is used to cool a compressor motor (36) in a refrigeration system having a multi-stage compressor (38). The compressor includes a first compressor stage (42) and a second compressor stage (44), the first compressor stage providing compressed refrigerant to an input of the second compressor stage. The motor coolant system has a first connection with the refrigerant loop to receive refrigerant into the motor cavity for cooling, the received refrigerant provided from a system component having a high pressure, and a second connection with the refrigerant loop to return refrigerant to an intermediate pressure greater than an evaporator operating pressure. The pressure inside the motor cavity may be approximately the pressure within the first stage discharge and second stage suction to minimized seal leakage between the motor cavity and the internal pressures of the first and second stage compressors.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: April 23, 2013
    Assignee: Johnson Controls Technology Company
    Inventor: Steven T. Sommer
  • Patent number: 8397534
    Abstract: A high efficiency, low maintenance single stage or multi-stage centrifugal compressor assembly for large cooling installations. A cooling system provides direct, two-phase cooling of the rotor by combining gas refrigerant from the evaporator section with liquid refrigerant from the condenser section to affect a liquid/vapor refrigerant mixture. Cooling of the stator with liquid refrigerant may be provided by a similar technique. A noise suppression system is provided by injecting liquid refrigerant spray at points between the impeller and the condenser section. The liquid refrigerant may be sourced from high pressure liquid refrigerant from the condenser section.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: March 19, 2013
    Assignee: AFF-McQuay Inc.
    Inventors: Mark C. Doty, Earl A. Campaigne, Jr., Thomas E. Watson, Paul K. Butler, Quentin E. Cline, Samuel J. Showalter
  • Patent number: 8387411
    Abstract: An air-conditioning apparatus uses carbon dioxide as a refrigerant, and includes a two-stage-compression-type compression mechanism, a heat source-side heat exchanger, an expansion mechanism, a usage-side heat exchanger, and an intercooler. The intercooler uses air as a heat source. The intercooler is configured and arranged to cool refrigerant flowing through an intermediate refrigerant tube that draws refrigerant discharged from the first-stage compression element into the second-stage compression element. The intercooler is integrated with the heat source-side heat exchanger to form an integrated heat exchanger, with the intercooler disposed in an upper part of the integrated heat exchanger.
    Type: Grant
    Filed: November 28, 2008
    Date of Patent: March 5, 2013
    Assignee: Daikin Industries, Ltd.
    Inventors: Shuji Fujimoto, Atsushi Yoshimi, Yoshio Ueno, Ryusuke Fujiyoshi, Toshiyuki Kurihara, Shun Yoshioka
  • Patent number: 8303270
    Abstract: A motor-driven compressor includes a housing having an inlet port, a compression mechanism for compression of refrigerant introduced from an external refrigerant circuit via the inlet port into the housing, an inverter having a heat-generating component, an electric motor driven by the inverter, and a rotary shaft rotated by the electric motor thereby to drive the compression mechanism. The electric motor, the compression mechanism and the inverter are aligned in the housing in axial direction of the rotary shaft. An inlet pipe is connected to the inlet port. The housing has an outer peripheral surface in contact with the inlet pipe. The heat-generating component of the inverter is disposed adjacent to or in contact with the inlet pipe so as to be thermally coupled to the inlet pipe.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: November 6, 2012
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Masao Iguchi, Masahiro Kawaguchi, Ken Suitou, Tatsushi Mori, Hiroshi Fukasaku
  • Patent number: 8261575
    Abstract: A self cooling motor system includes an internally cooled motor assembly operationally interconnected to a heat transfer assembly. The internally cooled motor assembly includes a winding assembly having one or more winding, each winding constructed of an electrically conductive material and having a fluid passage extending lengthwise therethrough. A fluid heat transfer media flows through the winding(s) while the internally cooled motor assembly is in operation, and the fluid heat transfer media is structured to remove a predetermined amount of heat from the winding(s) of the motor assembly. The fluid heat transfer media is transferred to the heat transfer assembly, where heat is dissipated from the fluid heat transfer media, reducing its temperature to a preselected exit temperature, prior to reintroduction into the winding(s) of the internally cooled motor assembly.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: September 11, 2012
    Inventor: Jeremy Holmes
  • Patent number: 8246318
    Abstract: Provided is a water-cooled air compressor which is capable of restraining lowering of the performance of a plate type compressor for heat-exchanging compressed air from a compressor body, with cooling water due to clogging of gaps between plates in the heat-exchanger by dust or the like, incorporating a first solenoid valve and a second solenoid valve connected respectively in a cooling water supply pipe line and a cooling water discharge pipe line of the heat-exchanger, an air feed pipe line connecting between a compressed air supply pipe line on the outlet side of the heat-exchanger and the cooling water discharge pipe line, a third solenoid valve and a check valve connected in the air feed pipe line, a discharge pipe line connected in a discharge pipe line 18 so as to branch therefrom, a fourth solenoid valve connected in the discharge pipe line, and a control device for controlling opening and closing of the first to fourth solenoid valves.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: August 21, 2012
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Hideharu Tanaka, Masahiko Takano, Akihiro Nagasaka
  • Patent number: 8181478
    Abstract: A refrigeration system can incorporate a liquid-injection system that can provide a cooling liquid to an intermediate-pressure location of the compressor. The cooling liquid can absorb the heat of compression during the compression of the refrigerant flowing therethrough. The refrigeration system can include an economizer circuit that injects a refrigerant vapor into an intermediate-pressure location of the compressor in conjunction with the injection of the cooling liquid. The incorporation of the vapor injection in conjunction with the cooling-liquid injection can advantageously increase the cooling capacity and/or efficiency of the refrigeration system and the performance of the compressor.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: May 22, 2012
    Assignee: Emerson Climate Technologies, Inc.
    Inventor: Kirill Ignatiev
  • Patent number: 8156757
    Abstract: A high efficiency, low maintenance single stage or multi-stage centrifugal compressor assembly for large cooling installations. The assembly is highly efficient by virtue of a variable frequency drive (VFD) that drives a permanent magnet motor and matches compressor speed with compressor load, a direct drive impeller that eliminates gearing losses, and magnetic bearings that reduce frictional losses. The back-emf produced by the motor provides an intermediate power source for the magnetic bearings in the event of a loss of electrical power. A cooling system provides direct cooling of the rotor with gas refrigerant, and cooling of the stator with liquid refrigerant. Modular construction allows the compressor to be retrofit with upgrades. An inlet guide vane system operates without need for oil lubrication. The use of light metal castings and elimination of gearing reduces the weight to one-third or less of comparably powered conventional units.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: April 17, 2012
    Assignee: AFF-McQuay Inc.
    Inventors: Mark C. Doty, Earl A. Campaigne, Jr., Thomas E. Watson, Paul K. Butler, Quentin E. Cline, Samuel J. Showalter
  • Publication number: 20120036874
    Abstract: A system for cooling a compressor for an appliance includes a water source, a compressor having an outer shell, the compressor being configured to compress a refrigerant during a cooling cycle of the appliance, and a fluid heat transfer device. The fluid heat transfer device is configured to receive water from the water source and apply the water to the outer shell for rejecting heat from the compressor.
    Type: Application
    Filed: August 12, 2010
    Publication date: February 16, 2012
    Inventors: Jianwu LI, Stephanos KYRIACOU
  • Publication number: 20120017617
    Abstract: An example compressor arrangement includes a first compressor portion configured to compress a fluid and a second compressor portion configured to compress the fluid more than the first compressor portion. The compressor arrangement also includes a motor disposed between the first compressor portion and the second compressor portion. The first compressor portion is configured to communicate the fluid to the second compressor portion along a primary flow path. The second compressor portion is configured to divert at least some of the fluid from the primary flow path, communicating the diverted fluid back to the first compressor portion along a secondary flow path.
    Type: Application
    Filed: July 20, 2010
    Publication date: January 26, 2012
    Inventors: Craig M. Beers, Christopher McAuliffe
  • Patent number: 8028540
    Abstract: A three-winding induction motor supplies shaft power to an air-conditioning or refrigeration compressor, where both motor and compressor are hermetically sealed, and the wall of the hermetic enclosure has an electrical bushing in the wall of the enclosure, which bushing has four electrical conductors to connect the motor stator windings internal in the enclosure to the external electrical circuits. Four conductors permit the six motor winding terminals for a three-winding induction motor to be connected in the unique semi-hexagon circuit to motor-run-capacitors and to a single-phase supply. A three-symmetrical-winding induction motor with the three windings in series and a single-phase supply connected across two of the windings in series. A circuit for use with a three-winding induction motor. A capacitor bank. An air-conditioning or refrigeration unit. A four-terminal hermetic bushing.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: October 4, 2011
    Assignee: 123Phase Inc.
    Inventor: Otto J. M. Smith
  • Patent number: 8021127
    Abstract: Apparatus and methods are provided for cooling motors used to drive gas and air compressors. In particular, the cooling of hermetic and semi-hermetic motors is accomplished by a gas sweep using a gas source located in the low-pressure side of a gas compression circuit. The gas sweep is provided by the creation of a pressure reduction at the compressor inlet sufficient to draw uncompressed gas through a motor housing, across the motor, and out of the housing for return to the suction assembly. The pressure reduction is created by structure in the suction assembly, such as a nozzle and gap assembly, or alternatively a venturi, located upstream of the compressor inlet. Additional motor cooling can be provided by circulating liquid or another cooling fluid through a cooling jacket in the motor housing portion adjacent the motor.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: September 20, 2011
    Assignee: Johnson Controls Technology Company
    Inventor: Paul De Larminat
  • Publication number: 20110189035
    Abstract: An object is to achieve a compact design by using a dead space in an inverter box effectively, to improve cooling properties of heat-generating electrical components disposed on a control circuit board of an inverter, and to increase flexibility of wiring layout. In an inverter box provided at a periphery of a housing, a heat-dissipating flat portion that is parallel to a control circuit board of an inverter is formed, and electrical components are disposed in a space between the heat-dissipating flat portion and the control circuit board. Preferably, the electrical components are installed so that the back faces thereof abut against the heat-dissipating flat portion either directly or via a heat-conducting member. More preferably, faces of the electrical components on the board side abut against the control circuit board.
    Type: Application
    Filed: October 14, 2010
    Publication date: August 4, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takashi Nakagami, Hiroyuki Kamitani
  • Publication number: 20110000227
    Abstract: To improve the exhaust heat recovery efficiency, a compressor includes a heat exchanger for cooling a gas, coolant, water, or oil heated by the compressor during compressor operation by heat exchange with a working fluid, for circulating the working fluid of a Rankine cycle. The Rankine cycle is implemented by the heat exchanger, an expander, a condenser, and a circulating pump to circulate the working fluid through the cycle.
    Type: Application
    Filed: July 1, 2010
    Publication date: January 6, 2011
    Inventor: Yuji KAMIYA
  • Publication number: 20100307191
    Abstract: A motor coolant method and system is used to cool a compressor motor (36) in a refrigeration system having a multi-stage compressor (38). The compressor includes a first compressor stage (42) and a second compressor stage (44), the first compressor stage providing compressed refrigerant to an input of the second compressor stage. The motor coolant system has a first connection with the refrigerant loop to receive refrigerant into the motor cavity for cooling, the received refrigerant provided from a system component having a high pressure, and a second connection with the refrigerant loop to return refrigerant to an intermediate pressure greater than an evaporator operating pressure. The pressure inside the motor cavity may be approximately the pressure within the first stage discharge and second stage suction to minimized seal leakage between the motor cavity and the internal pressures of the first and second stage compressors.
    Type: Application
    Filed: December 30, 2008
    Publication date: December 9, 2010
    Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY
    Inventor: Steven T. Sommer
  • Patent number: 7824160
    Abstract: A scroll back pressure chamber in a scroll compressor is composed of a space 111 filled with suction pressure (or intermediate pressure) and a space filled with discharge pressure, and the summation of the suction pressure (or the intermediate pressure) and the discharge pressure presses one of scrolls against the other of the scrolls. An injection hole, through which refrigerant in gas state or refrigerant in liquid state is injected into a compression chamber of the scroll compressor, is provided on a fixed scroll, and the gas refrigerant injection or the liquid refrigerant injection is selected and carried out according to an operating pressure ratio.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: November 2, 2010
    Assignee: Hitachi Appliances, Inc.
    Inventors: Satoshi Nakamura, Mutsunori Matsunaga, Shuji Hasegawa, Kenji Tojo
  • Patent number: 7775060
    Abstract: A drive unit for an electric vehicle is comprised of a motor, an inverter which supplies alternating current electric power to the motor, a speed reducer which is connected to the motor, and a cooling system which cools the motor, the inverter and the speed reducer. The speed reducer reduces a revolution speed of a mechanical output of the motor. The cooling system comprises a heat exchanger at which first refrigerant for receiving heat of at least one of the motor and the inverter receives heat of second refrigerant for receiving heat of at least one of the motor and the speed reducer.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: August 17, 2010
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yuki Nakajima, Masahiro Tsukamoto, Masakazu Kobayashi, Yutaro Kaneko, Hiroyuki Kaneko, Toshiro Shinohara, Makoto Iwashima, Yasuhiko Kitajima, Akihiro Hanamura, Kouichirou Yonekura, Tadayuki Hatsuda
  • Publication number: 20100170294
    Abstract: The object is to provide an integrated compressor that enables a control board to be miniaturized while ensuring a layout in which the heat radiation of parts is considered. Diodes 43 and IGBTs 42 that correspond to each of the U-phase, V-phase and W-phase are arrayed in series for each phase. Rectangular chips are used for the diodes 43 and IGBTs 42. As a result of this, a power board 16 is substantially miniaturized, and the diode 43, the IGBT 42, a P-terminal electrode pattern 40, an N-terminal electrode pattern 41, a shunt resistor 44, output terminal patterns 48U, 48V, 48W, and a feed pattern 50 are disposed so as to lie in a region in contact with an outer surface of a housing.
    Type: Application
    Filed: September 8, 2008
    Publication date: July 8, 2010
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takashi Nakagami, Koji Nakano, Masahiko Asai, Makoto Hattori, Kazuki Niwa
  • Publication number: 20100143165
    Abstract: An electric compressor provided with an integral inverter, incorporated with a motor and provided in a compressor housing with a motor drive circuit that includes the inverter. At least some of electric parts including the motor drive circuit are coated at an assembly-completed state with a resin material at a predetermined thickness by, for example, pouring of a liquid resin and draining of excess resin. In the electric compressor, a resin coating structure of the motor drive circuit is simplified, is easily coated with resin, is reduced in weight by reducing the amount of resin, and is reduced in cost.
    Type: Application
    Filed: February 13, 2008
    Publication date: June 10, 2010
    Inventors: Takaaki Itabashi, Masahiko Osaka, Kou Tsukamoto
  • Publication number: 20100101242
    Abstract: A system, method and apparatus for cooling the electronic components that regulate power and commutation of a refrigerant compressor motor in an air conditioning system. The electronic components are juxtaposed upon a heat sink provided with a refrigerant passageway. The heat sink is fluidly disposed in the refrigeration line between the evaporator assembly and compressor such that refrigerant returning from the evaporator assembly to the compressor of the air conditioning system travels directly to the heat sink and through the refrigerant passageway before reaching the compressor.
    Type: Application
    Filed: March 20, 2009
    Publication date: April 29, 2010
    Applicant: Enviro Systems, Inc.
    Inventors: Craig A. Froelich, Theodore L. Belshe, Stephen D. Rigney
  • Patent number: 7704056
    Abstract: A two-stage vapor cycle compressor includes a first stage impeller, a second stage impeller situated adjacent to the first stage impeller, an electric motor running on a pair of foil bearings, a thrust disk including two foil bearings and being positioned between the second stage impeller and the electric motor, and a compressor housing enclosing the first and second stage impeller and the electric motor. A refrigerant vapor compressed by the first stage and second stage impeller flows through an internal passageway formed by the compressor housing and cools the foil bearings and the electric motor. The compressor may be a gravity insensitive, small, and lightweight machine that may be easily assembled at low manufacturing costs. The two-stage vapor cycle compressor may be suitable for, but not limited to, applications in vapor compression refrigeration systems, such as air-conditioning systems, for example, in the aircraft and aerospace industries.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: April 27, 2010
    Assignee: Honeywell International Inc.
    Inventors: Mike M. Masoudipour, Allen Hansen, Chris Speights, Phung K. Duong, Zeng Qian
  • Publication number: 20100077793
    Abstract: An inverter-device built-in type electric compressor includes a compressor terminal and a direct-mounting connector, which connects the inverter-device to an external circuit, at an electric compressor side. The direct-mounting connector faces toward the electric compressor and is placed in parallel with a center axis of the electric compressor. A harness connector wired from a motor of the electric compressor is detachably and electrically connected to the compressor terminal, and the electric compressor is detachably and mechanically connected to the inverter-device.
    Type: Application
    Filed: September 24, 2009
    Publication date: April 1, 2010
    Inventors: Nobuyuki Nishii, Naomi Gotou
  • Patent number: 7637117
    Abstract: An air-conditioning system includes a refrigeration cycle and a control unit. The refrigeration cycle includes an electric compressor in which a compression mechanism for drawing a refrigerant therein for compression is integrated with an electric motor for driving the compression mechanism, and a motor drive circuit for driving the motor is cooled using an intake refrigerant drawn into the compression mechanism. The control unit provides operational control to the motor drive circuit and the refrigeration cycle. When the temperature of the motor drive circuit has exceeded a predetermined temperature, the control unit varies a condition of supplying air to exchange heat with the refrigerant flowing through the refrigeration cycle to thereby reduce the temperature of the intake refrigerant.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: December 29, 2009
    Assignee: Denso Corporation
    Inventors: Kunio Iritani, Yusuke Shindo, Kenji Iriyama, Akihito Higashihara
  • Publication number: 20090269220
    Abstract: An electric compressor (10, 10A, 10B, 10C) includes a suction chamber (14), a discharge chamber (15), a compressor body (20) configured to suck a fluid from the suction chamber (14), and then, discharge the compressed fluid in to the discharge chamber (15), an electric motor (30) configured to drive the compressor body (20), and an inverter (100) configured to control the electric motor (30). The inverter (100) is disposed in the suction chamber (14).
    Type: Application
    Filed: May 16, 2007
    Publication date: October 29, 2009
    Applicant: Calsonic Kansei Corporation
    Inventors: Masahiro Nakagawa, Yoshinobu Maemura
  • Publication number: 20090241592
    Abstract: A refrigeration system having a compressor, a condenser, an evaporator, an accumulator, and electronics for controlling the compressor. The accumulator collects gaseous and liquid refrigerant passing from the evaporator to the compressor. The electronics are mounted to the accumulator to transfer heat from the electronics to the refrigerant located within the accumulator to cool the electronics.
    Type: Application
    Filed: October 2, 2008
    Publication date: October 1, 2009
    Applicant: EMERSON CLIMATE TECHNOLOGIES, INC.
    Inventor: Robert C. Stover