Lubricant Handling Patents (Class 62/84)
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Publication number: 20150027146Abstract: A composition including 2,3,3,3-tetrafluoropropene and a lubricating oil including a polyalkylene glycol and a polyol ester, the polyol ester content in the lubricating oil being less than or equal to 25%. A method of lubricating a vapor compression circuit, the method including using a mixture including a polyalkylene glycol and a polyol ester as lubricating oil in the vapor compression circuit, in combination with a heat transfer fluid comprising 2,3,3,3-tetrafluoropropene, the content of polyol ester in the lubricating oil being less than or equal to 25%. Further, the use of said composition in methods for heating or cooling.Type: ApplicationFiled: January 9, 2013Publication date: January 29, 2015Inventor: Béatrice Boussand
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Publication number: 20140360210Abstract: 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: ApplicationFiled: December 5, 2012Publication date: December 11, 2014Inventors: William E. Lapp, Todd W. Smith, Arthur L. Butterworth, Paul J. Sikorsky
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Patent number: 8899073Abstract: A refrigerant storage device that arranges two end plates to form a cavity and includes a turbulator plate within the cavity. The turbulator plate is arranged within the cavity to reinforce the cavity by providing a plurality of reinforcement portions between the end plates. The cavity is sized and the turbulator plate is configured so a liquid portion of refrigerant flowing through the cavity collects onto the turbulator plate. The device has a rectangular shape that simplifies vehicle packaging and allows the device to be readily integrated into a plate-type refrigerant-to-liquid coolant heat exchanger. The device is formed by a stacking arrangement of parts that provides for a readily scalable design.Type: GrantFiled: December 14, 2011Date of Patent: December 2, 2014Assignee: Delphi Technologies, Inc.Inventors: Gary Scott Vreeland, Frederick Vincent Oddi
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Patent number: 8899054Abstract: Cooling devices for use with electric submersible pump motors include a refrigerator attached to the end of the electric submersible pump motor with the evaporator heat exchanger accepting all or a portion of the heat load from the motor. The cooling device can be a self-contained bolt-on unit, so that minimal design changes to existing motors are required.Type: GrantFiled: October 18, 2012Date of Patent: December 2, 2014Assignee: Los Alamos National Security, LLCInventors: Todd A. Jankowski, Dallas D. Hill
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Publication number: 20140331699Abstract: A refrigeration cycle device includes: a compressor that constitutes a refrigeration cycle and compresses a supplied refrigerant; a refrigerant-retaining container that retains the refrigerant into which lubricating oil for the compressor is mixed, and which separates the gas refrigerant from the liquid refrigerant, and sends out the gas refrigerant to the compressor; a refrigerant conveying pump that conveys a fluid mixture including the liquid refrigerant and the lubricating oil retained in the refrigerant-retaining container; and an internal heat exchanger that changes the liquid refrigerant conveyed out from the refrigerant-retaining container by the refrigerant conveying pump to the gas refrigerant, and provides the compressor with the gas refrigerant together with the lubricating oil. Since the refrigerant conveying pump conveys the fluid mixture containing the liquid refrigerant and the lubricating oil retained in a refrigerant-retaining container, stable operation is possible.Type: ApplicationFiled: November 30, 2011Publication date: November 13, 2014Applicant: MITSUBISHI ELECTRIC CORPORATIONInventor: Shinya Higashiiue
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Patent number: 8875525Abstract: An accumulator arrangement suitable for use in a cooling system designed for operation with a two-phase refrigerating medium, includes an accumulator vessel with a receptacle for receiving a refrigerating medium. A liquefier of the accumulator arrangement is adapted to liquefy refrigerating medium to be received into the receptacle of the accumulator vessel before fed in the receptacle of the accumulator vessel and includes a refrigerating medium outlet for discharging refrigerating medium which liquefied in the liquefier from the liquefier.Type: GrantFiled: March 23, 2012Date of Patent: November 4, 2014Assignee: Airbus Operations GmbHInventor: Markus Piesker
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Patent number: 8863533Abstract: A refrigerating cycle apparatus and a method of operating the same are provided. For a refrigerating cycle having a plurality of compressors connected in series for multi-stage compression, an inner space of each compressor and a pipe of the refrigerating cycle may be connected via an oil collection pipe, and oil may be discharged into the refrigerating cycle by pressure reversal during a pressure balancing operation, so as to allow the discharged oil to be collected into a high-stage compressor or a low-stage compressor. Accordingly, an amount of oil may be uniformly maintained in each of the plurality of compressors to prevent losses due to friction and/or increases in power consumption due to a lack of oil in one or more of the compressors. The structure of a device and pipes for performing oil balancing between the compressors may be simplified to enhance efficiency of the compressors.Type: GrantFiled: June 8, 2012Date of Patent: October 21, 2014Assignee: LG Electronics Inc.Inventors: Minkyu Oh, Jangseok Lee, Myungjin Chung, Chanho Jeon, Sunam Chae, Juyeong Heo, Kwangwook Kim, Hoyoun Lee
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Publication number: 20140305146Abstract: Herein disclosed is a lubricant oil or lubricant for the compressor of a refrigeration system which operates with a refrigerant comprising at least one component of the hydrocarbon (HC) group of refrigerants, (a) whereby the lubricant consists of at least 85 weight % of alkylbenzene having an average molecular weight of ?160 g/mol and exhibiting a viscosity of 2.2-3.0 centistokes (cSt) at 40 deg C.; optionally wherein the alkylbenzene consists of at least 85 wt % of linear (straight chain) alkylbenzene, having an average molecular weight of ?160 g/mol and exhibiting a viscosity of 2.2-3.0 centistokes (cSt) at 40 deg C.; (b) or alternatively whereby the lubricant consists of at least 85 weight % of alkylbenzene having an average molecular weight of ?190 g/mol and having a viscosity of 2.5-3.5 cSt at 40 deg C.; optionally wherein the alkylbenzene consists of at least 85 wt % of linear (straight chain) alkylbenzene, having an average molecular weight of ?190 g/mol and exhibiting a viscosity of 2.5-3.Type: ApplicationFiled: February 18, 2014Publication date: October 16, 2014Applicant: SHREIVE CHEMICAL PRODUCTS, Inc.Inventor: Elizabeth DIXON
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Patent number: 8850835Abstract: A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30, 32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. An electric motor compartment (50) of the case has a stator (42) and a rotor (40). The rotor is mounted to the crankshaft. The case has a wall (56) between the motor compartment and a crankcase compartment/sump (52). The wall bears a feature (120, 132; 420; 460) for coalescing oil entrained in a refrigerant flow (522), which flow exits the gap (90) between the rotor and the stator to prevent the oil from entering the cylinders.Type: GrantFiled: December 13, 2010Date of Patent: October 7, 2014Assignee: Carrier CorporationInventor: Paul J. Flanigan
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Publication number: 20140264147Abstract: Heat transfer compositions, methods and use wherein the composition comprising: (a) from about 5 to about 20% by weight of HFC-32; (b) from about 70% to about 90% by weight of HFO-1234ze; and (c) from about 5% to less than about 20% by weight of HFC-152a and/or HFC-134a.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Inventors: SAMUEL F. YANA MOTTA, MARK W. SPATZ, CHRISTOPHER J. SEETON
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Patent number: 8833102Abstract: A turbo compressor includes a case; a plurality of compression stages which is disposed rotatably with respect to the case via sliding parts; an oil tank in which lubricant oils to be supplied to the sliding parts are stored; an oil cooler for cooling the lubricant oils; a primary piping for communicating the oil tank with the oil cooler; and a secondary piping for communicating the oil cooler with the sliding parts, wherein an accommodation space in which the oil cooler is accommodated is formed in the case, and the primary piping and the secondary piping are disposed within the case.Type: GrantFiled: July 16, 2010Date of Patent: September 16, 2014Assignee: IHI CorporationInventors: Minoru Tsukamoto, Kentarou Oda
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Publication number: 20140245760Abstract: The present invention relates to compositions and processes of using perfluoropolyether to maintain or improve the oil return, lubrication, cooling capacity, or energy efficiency of a refrigeration, air conditioning or heat transfer system.Type: ApplicationFiled: May 14, 2014Publication date: September 4, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: Thomas Joseph Leck, Thomas Frank Saturno, Gregory A. Bell
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Publication number: 20140245761Abstract: A PAG lubricant basefluid for use with a fluoroalkene refrigerant, the basefluid containing a PAG having the formula: RX(RaO)x(RbO)yRc, where R is selected from alkyl groups having from 1-10 carbon atoms, acyl groups having from 1-10 carbon atoms, aliphatic hydrocarbon groups having from 2-6 valencies, and substituents containing a heterocyclic ring in which the heteroatom(s) are oxygen; X is O or S; Ra is a C2 alkylene group; Rb is a C3 alkylene group; Rc is the same as R or is an H; x and y are each independently 0 or an integer ?100; and the sum of x+y is an integer in the range of from about 5-100. Refrigeration and lubricant compositions containing the PAG lubricant basefluid and a method of operating a motor-integrated compressor of a refrigeration or air conditioning system with substantially no electrical leakage current are also provided.Type: ApplicationFiled: May 15, 2014Publication date: September 4, 2014Applicant: SHRIEVE CHEMICAL PRODUCTS, Inc.Inventors: Elizabeth DIXON, Phil Beckler
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Patent number: 8822395Abstract: The present invention provides a refrigerating machine oil composition for use in a compressor for a refrigerator in which a sliding surface of at least a part of constitutional members of the compressor is coated with a lubrication film-forming composition containing a resin having a heat distortion temperature of 100° C. or higher as a binder, and a solid lubricant, wherein the refrigerating machine oil composition contains a base oil made of a polyoxyalkylene glycol having a kinematic viscosity of from 3 to 50 mm2/s as measured at 100° C., and a compound selected from the group consisting of amide compounds, amidated amino acid compounds and aliphatic amines having a specific structural formula which compound is contained in an amount of from 0.Type: GrantFiled: April 27, 2006Date of Patent: September 2, 2014Assignee: Idemitsu Kosan Co., Ltd.Inventors: Harutomo Ikeda, Takayuki Kato, Manabu Sugiura, Masami Ohno, Shuichi Yasuda, Takahiro Sugioka
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Patent number: 8820103Abstract: An air conditioner includes a plurality of compressors, an intake passageway, a bypass unit, and an expansion valve. The intake passageway distributes a fluid to each of the compressors. The bypass unit includes a plurality of bypass pipes connected respectively to the compressors and a common bypass pipe to discharge the fluids from the compressors to the intake passageway. The expansion valve is provided to the bypass unit to control a flow of fluid from the common bypass pipe to the intake unit.Type: GrantFiled: December 22, 2010Date of Patent: September 2, 2014Assignee: LG Electronics Inc.Inventors: Hojong Jeong, Sedong Chang, Baikyoung Chung, Jiyoung Jang
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Publication number: 20140230465Abstract: Provided is a method for selecting a lubricant and a refrigerant for use in a vapor-compression refrigeration device such that the combination of the lubricant and refrigerant produces a fluid system having a lubricant-rich phase and a refrigerant-rich phase, yet exhibits miscible-type properties.Type: ApplicationFiled: April 25, 2014Publication date: August 21, 2014Applicant: HONEYWELL INTERNATIONAL INC.Inventors: RAYMOND H. THOMAS, CHRISTOPHER J. SEETON, DAVID P. WILSON, SAMUEL F. YANA MOTTA, MARK W. SPATZ
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Patent number: 8806876Abstract: An air conditioner (10) composed of a refrigerating apparatus includes a controller (90). A heating control section (91) of the controller (90) feeds electric current in an open phase state to an electric motor (62) of a compressor (30) to heat the compressor (30) in operation stop of the air conditioner (10). The heating control section (91) monitors the detection value of an outdoor air temperature sensor (72) during the operation stop of the air conditioner (10) and keeps on stopping feeding the electric current to the electric motor (62) during the time when the detection value decreases.Type: GrantFiled: August 3, 2007Date of Patent: August 19, 2014Assignee: Daikin Industries, Ltd.Inventors: Junichi Shimoda, Hidehiko Kinoshita
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Publication number: 20140216075Abstract: Disclosed are the use of fluorine substituted olefins, including tetra- and penta-fluoropropenes, in a variety of applications, including in methods of depositing catalyst on a solid support, methods of sterilizing articles, cleaning methods and compositions, methods of applying medicaments, fire extinguishing/suppression compositions and methods, flavor formulations, fragrance formulations and inflating agents.Type: ApplicationFiled: April 4, 2014Publication date: August 7, 2014Applicant: HONEYWELL INTERNATIONAL INC.Inventors: Rajiv R. Singh, Hang T. Pham, Ian Shankland
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Publication number: 20140202182Abstract: Disclosed are the use of fluorine substituted olefins, including tetra- and penta-fluoropropenes, in a variety of applications, including in methods of depositing catalyst on a solid support, methods of sterilizing articles, cleaning methods and compositions, methods of applying medicaments, fire extinguishing/suppression compositions and methods, flavor formulations, fragrance formulations and inflating agents.Type: ApplicationFiled: March 26, 2014Publication date: July 24, 2014Applicant: HONEYWELL INTERNATIONAL INC.Inventors: Rajiv R. Singh, Hang T. Pham, Ian Shankland
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Publication number: 20140174112Abstract: A vaporizer has: an inlet (72); an oil outlet (90; 94); a vent (120); a hot gas inlet (132); and a cooled gas outlet (134). A gas flowpath (130) extends from the hot gas inlet to the cooled gas outlet. A vaporizer chamber (192) is downstream of the inlet along a primary flowpath. A gas conduit (220) is along the gas flowpath in heat exchange relation with the primary flowpath. A sump (194) is below the vaporizer chamber. A housing (180) encloses the sump and the vaporizer chamber. A passageway extends from the vaporizer chamber to the sump.Type: ApplicationFiled: July 27, 2012Publication date: June 26, 2014Applicant: CARRIER CORPORATIONInventor: Anthony S. Molavi
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Publication number: 20140165631Abstract: One variation may include a product including a mixture including CF3CF?CH2 and a lubricating oil or grease wherein the lubricating oil or grease that reduces eliminates the likelihood that the refrigerant will ignite.Type: ApplicationFiled: December 14, 2012Publication date: June 19, 2014Applicant: GM Global Technology Operations LLCInventors: Jeffrey Santrock, Todd J. Gordon, Jeffrey A. Bozeman, Bryan M. Styles
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Patent number: 8739559Abstract: Provided is a method for selecting a lubricant and a refrigerant for use in a vapor-compression refrigeration device such that the combination of the lubricant and refrigerant produces a fluid system having a lubricant-rich phase and a refrigerant-rich phase, yet exhibits miscible-type properties.Type: GrantFiled: November 1, 2012Date of Patent: June 3, 2014Assignee: Honeywell International Inc.Inventors: Raymond H. Thomas, Christopher J. Seeton, David P. Wilson, Samuel F. Yana Motta, Mark W. Spatz
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Patent number: 8734118Abstract: A set of piston compressors (2, 4, 6, 8) for use in a refrigeration system comprises a fluid connection (10) between the crank cases of the piston compressors (2, 4, 6, 8) for allowing oil compensation between said piston compressors (2, 4, 6, 8); and a control unit (12) which in operation monitors the running time of each piston compressor (2, 4, 6, 8) and, in case all piston compressors (2, 4, 6, 8) are running, subsequently interrupts the operation of a respective piston compressor (2, 4, 6, 8) for a predetermined period of time for oil compensation if its running time reaches a predetermined maximum running time.Type: GrantFiled: October 18, 2007Date of Patent: May 27, 2014Assignee: United Technologies CorporationInventors: Bernd Heinbokel, Heinz Gassen, Kai Munker
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Patent number: 8603354Abstract: Provided is a lubricating oil composition for a refrigerator which uses a base oil including as the main component at least one kind of oxygen-containing compounds selected from polyoxyalkylene glycols, polyvinyl ethers, copolymers of poly(oxy)alkylene glycols or monoethers thereof and polyvinyl ethers, polyol esters, and polycarbonates. The lubricating oil composition for a refrigerator is used for a refrigerator that uses, as a refrigerant, a fluorine-containing organic compound, which is a refrigerant applicable to current car air conditioner systems or the like and has a specific polar structure, and has favorable sealing property, a low coefficient of friction factor in a sliding part, and excellent stability as well as excellent compatibility with the refrigerant.Type: GrantFiled: December 9, 2011Date of Patent: December 10, 2013Assignee: Idemitsu Kosan Co., Ltd.Inventor: Masato Kaneko
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Patent number: 8596088Abstract: An oil separator for an air conditioner, which includes: a case having a cylinder portion, and a lid portion and a bottom portion respectively closing an upper side opening end and a lower side opening end of the cylinder portion; an inlet pipe which is connectable to a discharging outlet of a compressor and which penetrates the lid portion so that an end of the inlet pipe is located inside the case; an outlet pipe which is connectable to a condenser and which penetrates the lid portion so that an end portion of the outlet pipe is located inside the case and protrudes into the cylinder portion toward the bottom portion; and a mesh portion which is provided to the end of the inlet pipe.Type: GrantFiled: March 22, 2010Date of Patent: December 3, 2013Assignee: Aisin Seiki Kabushiki KaishaInventor: Toshiyuki Sato
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Publication number: 20130312438Abstract: The temperature of high-temperature water at the exit of a condenser is maintained to be within a setting range by control of, under an operation with all cylinders, capacity of a reciprocating compressor in the period between a maximum allowable load and a minimum load for lubrication, at which the flow of a lubrication oil pump is ensured, based on the revolution-speed control of a drive motor that drives the reciprocating compressor and by control of the capacity of the reciprocating compressor at the minimum load for lubrication or less based on the combination of the control of decreasing the number of operation cylinders and the revolution-speed control of the drive motor. In addition, a heating mechanism is provided on an inlet path of the reciprocating compressor to prevent the liquefied refrigeration flow of a refrigerant liquid to the reciprocating compressor during the operation or at the start.Type: ApplicationFiled: May 3, 2013Publication date: November 28, 2013Applicant: MAYEKAWA MFG. CO., LTD.Inventor: MAYEKAWA MFG. CO., LTD.
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Patent number: 8590335Abstract: A refrigerant recovery unit is provided that can clear oil from an oil inject path in order to prepare the unit to switch over to a different kind of oil. The refrigerant recovery unit includes an oil inject circuit that receives an oil from the oil bottle into the refrigerant system. The refrigerant recovery circuit is coupled in fluid communication with the oil inject circuit. The refrigerant recovery circuit is operable to receive and transfer a fluid drawn through the oil inject circuit. A controller is operatively connected to the refrigerant recovery circuit and to the oil inject circuit so that as the fluid is drawn through the oil inject circuit a quantity of the oil in the oil inject circuit is removed.Type: GrantFiled: February 27, 2012Date of Patent: November 26, 2013Assignee: Bosch Automotive Service Solutions LLCInventors: William Brown, Mark McMasters, Gary Murray
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Patent number: 8590322Abstract: An oil separator includes a separation part and an oil storage part. The separation part includes a separation cylinder, an inner cylinder disposed in the separation cylinder and an inlet pipe connecting to the separation cylinder tangential to an inner surface of the separation cylinder. The separation part defines an inlet opening to introduce CO2 refrigerant containing oil in the separation cylinder. The separation cylinder separates the oil from the CO2 refrigerant by means of centrifugal force. A ratio of a flow rate (kg/h) of the CO2 refrigerant flowing in the separation cylinder to an area (mm2) of the inlet opening is at least 4. Alternative to or in addition to the above, a ratio of a distance (mm) from an end of the inner cylinder to a bottom wall of the separation cylinder to an inner diameter (mm) of the separation cylinder is at least 2.5.Type: GrantFiled: September 18, 2008Date of Patent: November 26, 2013Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Takashi Kusada, Yoichiro Kawamoto, Tadashi Hotta, Shigeki Iwanami
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Patent number: 8590324Abstract: An external heat exchanger is used to transfer heat from a compressor lubricant to an expanded working fluid, thereby cooling the lubricant. The heat exchanger may also be used to sub-cool condensed working fluid with the same flow of expanded working fluid. A horizontal scroll-type compressor includes an intermediate lubricant sump between a main bearing support and a scroll member. A counterweight on the crankshaft can travel through the lubricant in the intermediate sump to splash the lubricant around. A horizontal scroll-type compressor can include multiple machined surfaces that are utilized to precisely center and align components of the compressor.Type: GrantFiled: May 10, 2010Date of Patent: November 26, 2013Assignee: Emerson Climate Technologies, Inc.Inventors: Weihua Guo, Honghong Zhan, Shi Wang, Huaming Guo, Guibin Wang, Jin Zhang
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Patent number: 8590323Abstract: A turbo compressor includes a motor, an impeller which is rotationally driven as the rotative power of the motor is transmitted to the impeller, a gear unit which transmits the rotative power of the motor to the impeller, and an oil tank to which lubricant supplied to the gear unit is at least recovered, wherein the oil tank is a portion of a closed space formed by at least one of a motor housing surrounding the motor and an impeller housing surrounding the impeller.Type: GrantFiled: February 6, 2009Date of Patent: November 26, 2013Assignee: IHI CorporationInventors: Minoru Tsukamoto, Kentarou Oda
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Patent number: 8568608Abstract: This invention relates to the use of ionic liquids as lubricants in vapor compression systems for cooling or heating. This invention also relates to an apparatus for adjusting temperature that operates a vapor compression cycle.Type: GrantFiled: May 31, 2007Date of Patent: October 29, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Mark Brandon Shiflett, Akimichi Yokozeki
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Publication number: 20130255286Abstract: The invention relates to a refrigeration circuit with at least two compressors, each compressor comprising at least one lubrication point and at least one oil pump having an outlet for providing oil to said lubrication point; wherein the outlet of the oil pump of at least one of the compressors is fluidly connected to the lubrication point of at least one different compressor.Type: ApplicationFiled: December 2, 2010Publication date: October 3, 2013Inventor: Jan Siegert
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Publication number: 20130247599Abstract: A refrigeration system that induces lubricant-liquid refrigerant mixture flow from a flooded or falling film evaporator by means of the lubricant-liquid refrigerant mixture flow adsorbing heat from an electronic component.Type: ApplicationFiled: July 2, 2012Publication date: September 26, 2013Applicant: TRANE INTERNATIONALInventors: Todd J. Love, Michael Boehde, Benjamin E. Dingel
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Publication number: 20130199219Abstract: The present invention relates to compositions and processes of using perfluoropolyether to maintain or improve the oil return, lubrication, cooling capacity, or energy efficiency of a refrigeration, air conditioning or heat transfer system.Type: ApplicationFiled: March 15, 2013Publication date: August 8, 2013Applicant: E I DU PONT DE NEMOURS AND COMPANYInventor: E I DU PONT DE NEMOURS AND COMPANY
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Patent number: 8465665Abstract: The present invention provides a refrigerator oil composition which satisfies both sludge dispersibility and prevention of wear and seizing of sliding parts made of aluminum and/or iron, and a compressor and a refrigeration apparatus using the refrigerator oil composition. The refrigerator oil composition is characterized by comprising a base oil which is at least one member selected from mineral oils and synthetic oils, and at least one polyamide compound having two or more amide groups in the molecule and being present in an amount of 0.01 to 5% by mass based on the total amount of the refrigerator oil composition.Type: GrantFiled: June 29, 2011Date of Patent: June 18, 2013Assignee: Idemitsu Kosan Co., Ltd.Inventor: Masato Kaneko
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Patent number: 8435014Abstract: In the hermetically sealed scroll compressor, an injection pipe for injecting a fluid to a compression chamber is connected to an injecting port of a fixed scroll. The injecting port includes a first injecting port which is provided in the vicinity of a fixed scroll inner curve and injects the fluid to an orbiting outer compression chamber, and a second injecting port 22b which is provided in the vicinity of a fixed scroll outer curve and injects the fluid to a orbiting inner compression chamber 8b. The second injecting port is placed in parallel in a radius direction with respect to the first injecting port and is placed so that an orbiting scroll wrap does not practically communicate with the orbiting outer compression chamber in the state in which the orbiting scroll wrap is in contact with the outer side of a fixed scroll wrap.Type: GrantFiled: February 28, 2012Date of Patent: May 7, 2013Assignee: Hitachi Appliances, Inc.Inventors: Masao Shiibayashi, Kenji Tojo, Yasushi Izunaga
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Patent number: 8425796Abstract: Provided is a refrigerating machine oil which contains a base oil mainly containing at least one substance selected from the group consisting of a mineral oil, a synthetic alicyclic hydrocarbon compound, and a synthetic aromatic hydrocarbon compound and having a kinematic viscosity at 40° C. of 1 to 8 mm2/s. The refrigerating machine oil is applied to refrigerators including a sliding part formed of an engineering plastic or including an organic coating film or an inorganic coating film. The refrigerating machine oil enables to improve energy-saving performance due to its low viscosity, has a low frictional coefficient and good sealing property, and is suitably used in various refrigeration applications, especially in closed-type refrigerators.Type: GrantFiled: August 16, 2011Date of Patent: April 23, 2013Assignee: Idemitsu Kosan Co., Ltd.Inventor: Masato Kaneko
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Publication number: 20130091878Abstract: Cooling devices for use with electric submersible pump motors include a refrigerator attached to the end of the electric submersible pump motor with the evaporator heat exchanger accepting all or a portion of the heat load from the motor. The cooling device can be a self-contained bolt-on unit, so that minimal design changes to existing motors are required.Type: ApplicationFiled: October 18, 2012Publication date: April 18, 2013Applicant: Los Alamos National Security, LLCInventor: Los Alamos National Security, LLC
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Patent number: 8402778Abstract: The present invention relates to a method for increasing the solubility of oils in refrigerant compositions within a system using a refrigerant compressed with a mechanical device by adding polyolester directly to the refrigerant followed by charging a mixture of the polyolester and refrigerant into the system (air conditioner, refrigerator, etc.). The present invention also relates to a method of optimizing mineral oil return in a system using a refrigerant compressed with a mechanical device and a method of cleansing heat exchange tubes of a system using a refrigerant compressed with a mechanical device by adding polyolesters directly to a refrigerant composition followed by charging a mixture of the polyolester and refrigerant into the system.Type: GrantFiled: March 31, 2008Date of Patent: March 26, 2013Assignee: National Refrigerants, Inc.Inventors: Robert W. Yost, James P. Lavelle, Umar M. Khokhar
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Publication number: 20130067938Abstract: Provided is a method for selecting a lubricant and a refrigerant for use in a vapor-compression refrigeration device such that the combination of the lubricant and refrigerant produces a fluid system having a lubricant-rich phase and a refrigerant-rich phase, yet exhibits miscible-type properties.Type: ApplicationFiled: November 1, 2012Publication date: March 21, 2013Applicant: HONEYWELL INTERNATIONAL INC.Inventor: Honeywell International Inc.
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Publication number: 20130061616Abstract: A multi-connected air conditioner unit and method of operating the same, wherein, when an air-side heat exchanger is put into operation, and a water-side heat exchanger is not put into operation, a four-way valve is used to control a refrigerant to pass through said air-side heat exchanger, in realizing the refrigerating or heating operation of said unit; when said air-side heat exchanger is not put into operation, and said water-side heat exchanger is put into operation, said four-way valve is used to control said refrigerant to pass through said water-side heat exchanger to heat water, in achieving full recovery of heat; when both said compressors are put into operations concurrently, a dispenser is used to transport refrigerant oil separated by a second oil separator to an oil inlet pipe, then it is input to said compressor via an air suction pipe; and when a portion of compressor is put into operation, and another portion of compressor is not put into operation, since said air suction pipe is installed upType: ApplicationFiled: August 17, 2010Publication date: March 14, 2013Inventors: Ping Zhang, Shi Gang Li, Qian Ju Cheng, Min Cui
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Patent number: 8359873Abstract: To address the problem of lubricant entrainment within the refrigerant system components such as an evaporator and suction line, a control is provided to periodically, substantially and intermittently increase the refrigerant flow through these components to thereby carry the trapped lubricant back to the compressor. The increased flow of refrigerant can be accomplished by periodically throttling and then unthrottling either an expansion device or a suction modulation valve to cause instantaneous pressure buildup within a respective section of the vapor compression system and subsequent increase of the refrigerant flow through the above-referenced components such as an evaporator and suction line. Suggested time intervals of both the throttling and unthrottling states are provided, as well as the frequency of occurrence for subsequent oil return cycles.Type: GrantFiled: August 22, 2006Date of Patent: January 29, 2013Assignee: Carrier CorporationInventors: Alexander Lifson, Michael F. Taras
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Publication number: 20130008194Abstract: This description relates to a heat pump and a method of using the heat pump. The heat pump includes a hydraulic compressor that compresses a heat medium, an oil separation and recovery device that separates oil from the heat medium discharged from the compressor and returns the separated oil to the compressor, a condenser that liquefies the heat medium compressed in the compressor, a decompression device that decompresses the heat medium liquefied in the condenser, and an evaporator that causes the heat medium to absorb heat. The aforementioned devices are connected in series and the heat medium is circulated in those devices. The heat medium can be compressed at a compression ratio, at which a discharge temperature from the compressor becomes 150 to 200° C. An intake temperature control unit which can control the temperature of the heat medium taken into the compressor is on the intake side of the compressor.Type: ApplicationFiled: July 9, 2012Publication date: January 10, 2013Applicant: MAYEKAWA MFG. CO., LTD.Inventors: Toshiro HATTORI, Yusuke ISHIZUKI
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Patent number: 8349206Abstract: A process to lubricate a refrigerator preferably having a sliding portion which is made of an engineering plastic material, or provided thereon with an organic coating film or an inorganic coating film is provided. The process includes contacting sliding parts of the refrigerator with a refrigerating machine oil composition having a base oil containing a polyvinyl ether and/or a polyoxyalkylene glycol derivative as a main component and having a kinematic viscosity of 1 to 8 mm2/s as measured at 40° C. The refrigerating machine oil composition has a low viscosity, an improved energy saving performance, a good sealability and an excellent compatibility with a refrigerant and, therefore, the process can be suitably used in various refrigerating application fields, in particular, in closed-system refrigerators.Type: GrantFiled: February 18, 2011Date of Patent: January 8, 2013Assignee: Idemitsu Kosan Co., Ltd.Inventor: Masato Kaneko
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Publication number: 20120312034Abstract: A refrigerating cycle apparatus and a method of operating the same are provided. For a refrigerating cycle having a plurality of compressors connected in series for multi-stage compression, an inner space of each compressor and a pipe of the refrigerating cycle may be connected via an oil collection pipe, and oil may be discharged into the refrigerating cycle by pressure reversal during a pressure balancing operation, so as to allow the discharged oil to be collected into a high-stage compressor or a low-stage compressor. Accordingly, an amount of oil may be uniformly maintained in each of the plurality of compressors to prevent losses due to friction and/or increases in power consumption due to a lack of oil in one or more of the compressors. The structure of a device and pipes for performing oil balancing between the compressors may be simplified to enhance efficiency of the compressors.Type: ApplicationFiled: June 8, 2012Publication date: December 13, 2012Inventors: Minkyu OH, Jangseok Lee, Myungjin Chung, Chanho Jeon, Sunam Chae, Juyeong Heo, Kwangwook Kim, Hoyoun Lee
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Patent number: 8322149Abstract: Provided is a method for selecting a lubricant and a refrigerant for use in a vapor-compression refrigeration device such that the combination of the lubricant and refrigerant produces a fluid system having a lubricant-rich phase and a refrigerant-rich phase, yet exhibits miscible-type properties.Type: GrantFiled: April 1, 2009Date of Patent: December 4, 2012Assignee: Honeywell International Inc.Inventors: Raymond H. Thomas, Christopher J. Seeton, David P. Wilson, Samuel F. Yana Motta, Mark W. Spatz
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Patent number: 8312731Abstract: A refrigeration apparatus includes an outdoor unit having a first compressor and a second compressor connected in parallel with each other, a first oil separator attached to the first compressor and connected to a suction pipe of the second compressor via a first oil return piping including a pressure reducing device, and a second oil separator attached to the second compressor and connected to a suction pipe of the first compressor via a second oil return piping including a pressure reducing device. The suction pipes of the first and second compressors are connected together. The first compressor is a variable-speed compressor, and the second compressor is a constant-speed compressor. A solenoid valve selectively forming a bypass circuit with respect to the pressure reducing device, is connected in parallel with the pressure reducing device of the first oil return piping. The solenoid valve is opened when the first compressor is restarted.Type: GrantFiled: December 3, 2009Date of Patent: November 20, 2012Assignee: Fujitsu General LimitedInventors: Satoshi Tomioka, Hideya Tamura, Tetsuya Ito, Takahiro Matsunaga, Takamitsu Kurokawa, Shintaro Sanada
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Publication number: 20120186280Abstract: A refrigerant recovery unit is provided that can clear oil from an oil inject path in order to prepare the unit to switch over to a different kind of oil. The refrigerant recovery unit includes an oil inject circuit that receives an oil from the oil bottle into the refrigerant system. The refrigerant recovery circuit is coupled in fluid communication with the oil inject circuit. The refrigerant recovery circuit is operable to receive and transfer a fluid drawn through the oil inject circuit. A controller is operatively connected to the refrigerant recovery circuit and to the oil inject circuit so that as the fluid is drawn through the oil inject circuit a quantity of the oil in the oil inject circuit is removed.Type: ApplicationFiled: February 27, 2012Publication date: July 26, 2012Applicant: SERVICE SOLUTIONS U.S. LLCInventors: William Brown, Mark McMasters, Gary Murray
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Publication number: 20120111033Abstract: A space-saving cooling system for an aircraft may include an evaporator in an enclosure with an accumulation region in the enclosure for a liquid mixture of liquid refrigerant and lubricating oil. Space saving may be achieved through a combining of evaporator functions and accumulator functions in a single enclosure. A heat exchanger may be interposed between the evaporator and the compressor for heating refrigerant emerging from the evaporator so that liquid refrigerant does not reach an inlet of the compressor.Type: ApplicationFiled: November 8, 2010Publication date: May 10, 2012Applicant: HONEYWELL INTERNATIONAL INC.Inventors: RANJIT DARKE, PETER ZHENG, RICKY GOV
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Publication number: 20120096878Abstract: Disclosed is a refrigeration circuit in which a scroll compressor is used as a compressor, an unsaturated fluorinated hydrocarbon refrigerant is used as a refrigerant, and an ether-based lubricant such as a polyalkylene glycol is used as a refrigeration machine oil, and wherein a wax-like solid material, which causes clogging of the refrigeration circuit or deterioration of the refrigeration performance, is prevented from being generated. Specifically, a wax-like solid material is prevented from being generated in a refrigeration circuit by adding a lubricant type component having no polyoxyalkylene structure such as an ester-based lubricant, an alcohol-based friction modifier, an olefin-based friction modifier, a polyolefin-based lubricant, an alkyl aromatic lubricant or a silicone-based lubricant, or a metal deactivation agent such as benzotriazole to an ether-based lubricant such as a polyalkylene glycol.Type: ApplicationFiled: June 16, 2010Publication date: April 26, 2012Inventors: Hiromitsu Kamishima, Tomoaki Matsuzaki, Yuuichi Matsumoto